Building Service Project 2 Case Study Report

BUILDINGSERVICE
GROUPMEMBERS
CHANPINQI 0314676
CHOONGLAIMUN 0313573
JOLENEHOR 0313751
LEEJOYEE 0314880
NAAJID NASEEM 0311649
PRESPRESTONLIEWRUPING 0313822
LECTURER
MRSIVAMANKUPPUSAMY
CASESTUDYANDDOCUMENTATION
OFBUILDINGSERVICESSYSTEM
JAYASHOPPINGMALLSEKSYEN14,PETALINGJAYA
ARC2423

TABLE OF CONTENT
1. ABSTRACT
2. ACKNOWLEDGEMENT
3. INTRODUCTION
4. MECHANICAL VENTILATION SYSTEM
4.1 INTRODUCTION
4.2 LITERATURE REVIEW
4.3 CASE STUDY
4.3.1 SUPPLY VENTILATION SYSTEM
4.3.2 EXHAUST VENTILATION SYSTEM
4.3.3 COMBINED VENTILATION SYSTEM
4.4 COMPONENTS OF THE SYSTEM
4.4.1.1 FAN
4.4.1.1.1 PROPELLER FAN
4.4.1.1.2 AXIAL FLOW FAN
4.4.1.2 FIRE DAMPER
4.4.1.3 DUCTWORKS
4.4.1.4 FILTER
4.4.1.5 DIFFUSER
4.5 CONCLUSION
5. AIR-CONDITIONING SYSTEM
5.1 INTRODUCTION
5.3 CASE STUDY
5.4.1 REFRIGERANT CYCLE
5.4.1.1 WATER TANKS
5.4.1.2 COOLING TOWER
5.4.1.3 CHILLER PLANTS ROOM
5.4.1.3 CHILLERS

5.4.1.4 CONTROL UNIT
5.4.1.5 WATER PUMP SETS
5.4.2 AIR CYCLE
5.4.2.1 AIR HANDLING UNIT (A.H.U.)
5.4.2.2 AIR FILTER
5.4.2.3 BLOWER FAN
5.4.2.4 DUCTWORK AND DIFFUSERS
5.4.2.5 FAN COIL UNITS (F.C.U.)
5.5 CONTROL SYSTEM
5.6 CONCLUSION
6. FIRE PROTECTION SYSTEM
6.1 INTRODUCTION
6.3 CASE STUDY
6.4 ACTIVE FIRE PROTECTION SYSTEM
6.4.1 FIRE ALARM SYSTEM
6.4.1.1 OVERVIEW
6.4.1.2 COMPONENTS
6.4.1.2.1 SMOKE DETECTOR
6.4.1.2.2 ALARM BELL & BREAK GLASS
6.4.1.2.3 FIRE CONTROL ROOM
6.4.1.2.4 VOICE COMMUNICATION
6.4.1.2.5 FIRE SWITCH
6.4.1.2.6 MANUAL PULL SWITCH
6.4.1.3 SYSTEM OPERATION
6.4.2 SPINKLER SYSTEM
6.4.2.1 OVERVIEW
6.4.2.2 COMPONENTS
6.4.2.2.1 SPRINKLER
6.4.2.2.2 BUTTERFLY VALVE
6.4.2.2.3 PUMPS
6.4.2.2.4 WATER TANK
6.4.3 HOSE REEL SYSTEM
6.4.3.1 OVERVIEW
6.4.3.2 COMPONENTS
6.4.3.2.1 HOSE REEL DRUM
6.4.3.2.2 HOSE REEL DRUM PUMPS

6.4.4 WET RISER SYSTEM
6.4.4.1 OVERVIEW
6.4.4.2 COMPONENTS
6.4.4.2.1 WET RISER
6.4.4.2.2 WET RISER PUMP SETS
6.4.4.2.3 WET RISER PUMPS
6.4.5 CARBON DIOXIDE FIRE SUPPRESSION SYSTEM 6.4.4.1 OVERVIEW
6.4.5.1 OVERVIEW
6.4.5.2 COMPONENTS
6.4.5.2.1 CO2
6.4.6 FIRE EXTINGUISHER
6.4.6.1 OVERVIEW
6.4.6.2 COMPONENTS
6.4.6.2.1 ABC POWDER FIRE EXTINGUISHER
6.4.6.2.2 CO2 FIRE EXTINGUISHER
6.5 PASSIVE FIRE PROTECTION SYSTEM
6.5.1 FIRE EVACUATION ROUTE
6.5.2 FIRE STAIRCASE
6.5.3 FIRE RATED DOOR
6.5.4 FIRE RESCUE ACCESS
6.5.5 COMMAND AND CONTROL CENTER
6.5.6 SMOKE CURTAIN
6.5.7 FIRE BARRIER GATE
6.6 CONCLUSION
7. MECHANICAL TRANSPORTATION SYSTEM
7.1 INTRODUCTION
7.2.1 ELEVATOR
7.2.2 ESCALATOR
7.2.3 TRAVELATOR
7.3 ELEVATOR
7.3.1 PASSENGER LIFT
7.3.2 SERVICE LIFT
7.3.3 EMERGENCY INDICATORS

7.4 ESCALATOR
7.5 TRAVELATOR
7.6 ANALYSIS
7.7 CONCLUSION
8. CONCLUSION
9. REFERENCES

1CHAPTER
ABSTRACT
For this project, we were assigned to select a building 5 storey high and perform a
thorough analysis on how some of the service systems in the building functions in a qualitative
form. This was to be achieved by experimental learning, through own observations and experience.
Our task was to produce an A4 bounded report with detailed analysis on how the services
components function in the building works. This was to be summarized in diagrammatic forms and
images.Therefore, this report is mainly about how the various service components in Jaya
shopping center functions exploring the advantages and disadvantages of the systems used.
Furthermore, each of the system is compared with the UBBL Law requirement in order to
get a better understanding of the space implications and the regulations related to different service
buildings. The positioning and the connections of the various service equipments are also
discussed in addition with diagrammatic images of how each of the system functions.

2CHAPTER
ACKNOWLEDGEMENT
This project was a success due to the help of a lot of people. To start with, on behalf of all
members of our group we would like to express our deepest gratitude to Mr. William, who
contributed his time to guide us through the visit to Jaya shopping Centre. It is also important to
acknowledge the whole management of Jaya shopping centre as they really helped in making this
visit a success.
On the visit to the shopping centre, we were guided by Mr.William and the facilities
manager officer to all the required service rooms where he briefly explained us how each of the
system functions. They were also kind enough to test out some of the machines in front of us to
make us understand better.
In addition to this, we would also like to thank our Lecturer Mr.Siva, who has guided us in
terms of getting a better understanding of the systems which were being used and helped us
develop our report throughout.
To sum up, this project helped us get a better understanding about the different services which
are provided in the building and this certainly was achieved once again due the help of MR William,
Jaya shopping centre management, and our lecturer.

3
CHAPTER
INTRODUCTION
FIGURE 1a :BIRD EYE VIEW OF JAYA SHOPPING MALL
Source:https://www.malaysianfoodie.com/2014/04/jaya-shopping-centre-opens-today.html#.Vk6aFXarTIU
Jaya Shopping Mall is a mall with a lot of sentimental value to many of the locals
around the area. It was a source of comfort, inspiration and pride to the locals. Jaya Shopping
Mall, once known as Jaya Supermarket is still fondly remembered by Petaling Jaya folks. It was
first built in 1974 and went through a few renovations. In 2008, the building was marked for
redevelopment. During the demolition process on May 28 2009, the building collapsed. Jaya
Shopping Mall was finally completed and started operation again in April 28 2014.

The redevelopment of the building was to prevent unsavoury business. The new
building aimed to provide an affordable platform to new entrepreneurs. The interior design of
the centre is based on the “race course” layout which give customers good visibility of all
outlets. Jaya Shopping Mall stands out as the neighbourhood retail centre with rich memories
and a strong association with the local community. The building is seven floors and 30% of the
tenants are from the previous building. The smaller units are around 13.9sqm while bigger units
which are 63.17sqm are available on the higher floors of the shopping mall.
The building is equipped with complete services of fire protection, mechanical
transportation, ventilation and air conditioning systems Mechanical transportation makes it
more convenient and easier for occupants of the building to move between the different levels
while fire protection is to provide safety to the occupants in case of an emergency . The rest of
the services is to provide a comfortable and safe environment for the occupants of the building.
FIGURE 1b :INTERIOR VIEW OF JAYA SHOPPING MALL
Source: http://www.starproperty.my/index.php/articles/events/new-look-for-the-jaya-shopping-centre/

4CHAPTER
MECHANICAL VENTILATION SYSTEM

4.1 Introduction
Ventilation is a process of exchanging air. It includes both replacing air from outside or
circulating air within a space. It is important in obtaining healthy and comfort condition. Ventilation
helps to prevent heat concentration (heat produced by lighting, machine and human) and air
humidity. Ventilation is also used to remove carbon dioxide, unpleasant smells, excessive moisture
and contaminants such as airborne bacteria, smoke to replenish the indoor space with oxygen to
maintain the percentage of oxygen at 21%. The disposal of gas plays a crucial role in fire
prevention. Therefore, a building should ensure a good air circulation for comfort and safety
purpose. Ventilation is divided into natural ventilation and mechanical ventilation. Natural
ventilation occurs when there’s air difference. It can be achieved via operable windows. Warm air
in the building rises to the upper openings and cool air is forced in to ventilate the building.
Although natural ventilation is energy saving, it is very climatic based and varies due to different
location. That’s when mechanical ventilation is introduced to reach the standard required of air in a
building.
Mechanical Ventilation is used for application where natural ventilation is not appropriate.
Without mechanical ventilation brings in fresh air, contaminants, heat, moisture, odors may be left
in the building and caused health problem as well as fire. Mechanical ventilation circulates fresh air
by using fans, ductwork rather than relying on openings. Air is being pushed inward or outward by
motorized fan, resulting in different air pressure state, and thus allowing the air to circulate around
the building in a mechanical way. This is more efficient than natural ventilation when the building is
built below ground level and has a huge coverage area.
The purpose of having mechanical ventilation primarily goes to the importance of fresh
outdoor air. Sometimes, indoor air is much more polluted than outdoor air. Mechanical ventilation
can thus provide a good air quality condition. Besides, mechanical ventilation is much more
controllable compare to the natural ventilation. Relying on airflow via openings through walls,
windows or roof, there’s no control of the source and the amount of airflow. In fact, air leaking in
the house may from undesirable area like garage or crawl space and thus increase the level of
pollutant in the air. The system is planned before-handed on the sources of airflow and is filtered
before entering the building. Air is brought in and pollutant is extracted out consistently and thus
provides a comfort living condition.

4.2 Literature Review
Mechanical ventilation can be found in various systems according to the function of the
space. There are three type of system, which are, supply ventilation system, extract ventilation and
combined ventilation system.
4.2.1 Supply Ventilation System
Supply ventilation system is system where fresh air is brought in mechanically, and extract
naturally through the openings from the building. It creates over pressure condition. Air is then
drawn out due to lower pressure at the outside.
Figure 4.2.1.a: SUPPLY VENTILATION AIR FLOW DIRECTION DIAGRAM
Source :( http://energy.gov/energysaver/whole-house-ventilation)
The air supply is located in high place and the air inlet must have the possibility of
regulated. It should not be located near the outlet location to prevent air from escaping being
circulating the building. An air filter is connected to the inlet inside the ductwork to clean the coming
air.

A fan or a set of ductwork is used to distribute the fresh air from outside or it can be
connect with the returning air duct, allowing the heating and cooling system’s fan and ducts to
process the outdoor air before being distributed.
The benefit of connecting to returning air duct is the outdoor air can be air-conditioned or
dehumidified before it is introduced into the room. At the same time refreshing the returning indoor
air. Supply ventilation system suitable for hot or mixed climates. It is because they pressurize the
house, but may have the potential to create moisture problem in cold climates.
4.2.2 Exhaust Ventilation System
Exhaust ventilation system is a system where mechanically exhaust the air to the outside.
This creates under pressured in the building. The under pressure creates a pressure difference
over the ventilation openings, so air is suck in naturally.
FIGURE 1.2.2.1 EXHAUST VENTILATION AIR FLOW DIRECTION DIAGRAM
A controllable exhaust controls the ventilation capacity. In residential area, such system is
applied in kitchen (suck out smoke) and toilets. Suction duct is required. In non-residential building,

such system is applied in places like basement, corridor, food court and etc. The extraction of air
processes a loud noise. Thus, baffle filters can be used.
Single fan is installed in the duct connect to the central exhaust point to be expel to outside.
Passive vents are installed for the air to flow in. Passive vents however needed a large pressure
difference compare to those induced by mechanical supply system.
One concern of the exhaust ventilation system is that the possibilities of pollutants existence,
including Radon and molds from a crawlspace
 Dust from an attic
 Fumes from an attached garage
 Flue gases from a fireplace or fossil-fuel-fired water heater and furnace.
Exhaust ventilation contributes to higher operation energy and cost in heating or cooling the
air because the air supply is brought in naturally with contaminants and moisture.
4.2.3 Balanced Ventilation System
In a balanced ventilation system (also known as combined ventilation), both the supply air
and the exhaust air is done mechanically. The air pressure of the room is in neutral state. As the
pressure created by the supply air is then depressurized by the exhaustion of air.
FIGURE 4.2.3.A COMBINED VENTILATION AIR FLOW DIRECTION DIAGRAM

This system is known as the most efficient way in ventilating the air as it is independence of
outdoor weather despite of noisy environment and high installation cost. The combination of
system requires two ducts and fan system. This system usually applied in the area where natural
ventilation hardly access or hard to control such as basement and suitable for all climates.
4.2.4 Comparison between the three systems
Table 4.2.4a COMPARISON OF VENTILATION SYSTEM
Ventilation System Pros Cons
Supply Ventilation  Relatively inexpensive and
simple to install
 Allow better control than exhaust
system
 Minimize pollutants from outside
 Prevent back drafting of
combustion gases from
fireplaces and appliances
 Allow filtering of pollen and dust
in outdoor air
 Allow dehumidification of air
 Work well in hot and humid
climate
 Can cause moisture problem
in cold climate
 Will not temper or remove
moisture from outside air
 Can increase heating and
cooling costs
 May require mixing of outdoor
and indoor air to avoid drafts
in cold weather
Exhaust Ventilation  Relatively inexpensive and
simple to install
 Work well in cold climates
 Can draw pollutants into
living space
 Not appropriate for hot and
humid climates
 Rely in part on random air
leakage
 Can increase heating and
cooling cost
 May require mixing of outdoor
and indoor air to avoid drafts
in cold weather
Balanced
Ventilation
 Appropriate for all climate  Can cost more to install and
operate than exhaust or
supply system
 Will not temper or remove
moisture from incoming air

4.3 Case Study
Jaya Seksyen 14 complies all the three system in achieving comfort condition due to different
function and location of specific space. Different in floor levels may resulted in use of different
system. The following shows the list of application of ventilation system.
1. Supply Ventilation System
 Pressurized Staircase System
2. Exhaust Ventilation System
 Smoke Spill System
 Kitchen& Utilities room Exhaust System
 Utilities Room Exhaust System
3. Balanced Ventilation System
 Ducted Ventilation System (Basement)
 Generator room Ventilation System
FIGURE4.3.A: SUMMARIZATION OF VENTILATION SYSTEM IN JAYA DIAGRAM
Mechanical Ventilation
Pressurized System
Smoke Spill SystemDucted System

4.3.1. Pressurized System
Pressurization system is sometimes required especially in high-rise and under-ground
buildings. Pressurized an area with aspect to another adjacent area so that the smoke cannot enter
it. Pressurization of staircase occurred when a constant volume of fan running, pushing air through
any stair door that opens, create slightly higher pressure condition compare to the function space.
4.3.1.1. Stairwell Pressurized System
FIGURE4.3.1.1A LOCATION OF EXHAUSTS FANS OF STAIRWELL AT ROOFTOP
Source: Actuated-Dampers-In-Smoke-Control-System Pg26

For staircase pressurization system, all the fans are dual-speed completed with roof cowl
and located at the rooftop of staircase shaft. During normal condition, the fans will run in normal
speed for pressurization during fire mode.
The fans are controlled by the BAS (Building Automation System), will be overwritten by
fire signal and run at higher speed during fire mode to provide a highly pressured condition,
avoiding the smoke from entering.
One fan is serving to each stairwell (located at the bottom level). The fan will discharge air
into the entire staircase shaft. Therefore, the staircase will be pressurized. To prevent the stairwell
to be overly pressurized, each stairwell contains one no. Pressure relief damper and maintain the
pressure reading at preset valve. All building staircase will be protected by air pressurization
system during fire mode. Pressure reading for stairwell fans normally rated at 8 no.
Higher
Pressure
Lower
Pressure
FIGURE4.3.1.1.B PRESSURIZATION SYSTEM IN VESTIBULE STAIRWELL

The pressure relief damper located at every floor of stairwell (as shown in figure 4.3.1.1.1b)
that responds to the pressure near them. If the pressure increases, the dampers drive towards
close. If the pressure falls, typically due to the opening of door, then the dampers open.
UBBL- Clause 202
Pressurized system for staircase All staircase
serving buildings of more than 45 meters in height
where there is no adequate ventilation are
required shall be provided with a staircase
pressurization system designed and installed in
accordance with MS1472.
Damper
Duct
Fan
Figure4.3.1.1.STAIRWELL PRESSURIZATION SYSTEM USING
PROPORTIONAL DAMPER CONTROL
Figure4.3.1.1.c : PRESSURE RELIEF DAMPERS
(STAIRCASE)
UBBL Clause 198-202
Ventilation for staircase at each
floor or landing with a minimum
1sqm opening per floor. In
building less than 3-storeys,
staircase may not be ventilated if
access via ventilated lobbies at
all floors except the top most
and; if buildings 18m high or less
with top most floor ventilated at
top most with5 % of area of
enclosure. Buildings higher than
18m to be mechanically
ventilated if not naturally
ventilated at every floor or
landing.

4.3.1.2 Lift Lobby Pressurized System
For lift lobby pressurized system, the fan is single speed motor only, located at the roof top.
It will draw fresh air from atmosphere into the galvanized metal duct or masonry shaft and
discharge into lift lobby via individual grille.
For lift lobby pressurized system, the fans are normally ‘OFF’ or at standby mode during
normal condition. Each fan is serving to one lift lobby. Each lift lobby pressurization system is
equipped with motorized by-pass damper and differential pressure sensor. This by-pass pressure
sensor helps in maintaining each lobby with adjacent area at 45 Pa. excess air will be relieved into
the atmosphere by the motorized by-pass damper at the fan discharge.
Passenger lift lobby and service lift lobby will be protected by air pressurization system
during the fire mode. Motorized fire dampers in the lift lobby require fire signal connection. These
dampers are normally closed and will be triggered open for the floor on fire based on sandwich
basis.
FIGURE4.3.1.2 A PRESSURIZATION OF LIFT LOBBY AREA AND STAIRWELL
ASHARE-6.4.3.4
Ventilation System Controls
(2) Shutoff damper controls all outdoor air intake
with motorized dampers that will automatically shut
when the system or spaces served are not in use.
Ventilation outdoor air or exhaust/relief dampers
shall be capable of automatically shutting off
during preoccupancy building warm-up, cool down,
and setback, except when ventilation reduces
energy cost or when ventilation must be supplied
to meet code requirement.
Figure4.3.1.2b Dampers located at lift lobby

4.3.2 Smoke Spill System
When fire occurs in a building, ventilation is needed to prevent the accumulation of smoke
in tripping the people from escape. Combined ventilation is used where air inlet is driven in and
smoke is exhaust out from the building.
Inlet air supply is can give troubles with mechanical extraction when there’s fire. This is
because the warmed air taken out will have a greater volume than the inlet air. As the fire grows
and declines, the mismatch in volume between the extracted fire warmed air and inlet air will also
change. This can result in significant pressure difference appearing across any doors on the
escape route. Hence, to prevent this ‘push and pull’ effect, replacement of fresh air shall be drawn
by natural means.
UBBL
Clause 249-252
Smoke and heat venting in large buildings, natural draught smoke vent, smoke vent for exit safety
to be designed to prevent accumulation of smoke during evacuation and manual vents must be
operable by Bomba from outside.
Figure4.3.2.a : SMOKE FLOW WHEN FIRE OCCURS AND SMOKE CURTAIN
Source: http://www.scdf.gov.sg/content/scdf_internet/en/building-
professionals/publications_and_circulars/fire_code_2002handbooks/_jcr_content/par/download_17/file.res/hb_v

Applying Venturi effect, the smoke, which is in stationary state, has higher pressure
compare to the moving fresh air (from the door). Hence, moving air stream will then attract the
stationary air (smoke) towards itself. Thus prevent smoke accumulation and aid in smoke
extraction.
Figure4.3.2.b INLET AIR FLOW DIRECTION (NATURAL SOURCE)
Source: http://www.scdf.gov.sg/content/scdf_internet/en/building-
Turbulent mixing area
Figure4.3.2.c INLET AIR NATURAL SOURCES
Fresh air make up for the atrium
smoke spill system is contributed
by 1 nos. fresh air, as shown in
figure below located at ground
floor and all entrance doors
(figure on the left). Fire signal is
required to trigger the fresh air
fan and door entrance as any
floor above ground is on fire.

Figure4.3.2.d FRESH AIR MAKE-UP FOR ATRIUM SMOKE SPILLS SYSTEM
LOCATING IN GROUND FLOOR PLAN

Figure4.3.2e: EXHAUST LOCATION AT ROOF TOP OF JAYA SEKSYEN 14
Figure 4.3.2.1a shows the location of smoke spill exhaust located at the roof top area of
Jaya Seksyen 14 shopping mall. There’re 7nos. of smoke spill (6 duties; 1 standby) for atrium
smoke exhaust located at roof. Those fans require fire signal to operate as any floor above ground
(ground floor to Level5) is on fire.
Smoke spill fans only operate during fire alarm mode. When the fire alarm is triggered, the
signal from fire alarm panel will reach to the Smoke Spill Panel. A 20 seconds time delay allowed
adequate period for the motorized dampers to close or open. Then, the smoke spill fans will run
and discharged out the building.

Figure4.3.2. f : EXHAUST LOCATION AT ROOF TOP OF
JAYA SEKSYEN 14
Figure4.3.2.g :EXHAUST LOCATION AT ATRIUM AREA
The operation of smoke spill system in basement shall be individual basis. There are total
12 nos. of exhaust fans and 12nos. of fresh air make up fans. Smoke spill fans and fresh air make
up fans will only operate in fire mode if particular basement is on fire. Fire signal should be sent to
the fan local panel for the floor. An inverse signal should send to the other basement so that the
normal operating fan will be tripped.
Figure4.3.2.h :LOCATION OF SMOKE SPILL FAN IN BASEMENT 2 PLAN.

4.3.3 Ducted System
Jaya seksyen14 shopping mall practice traditional mechanical ventilation system, which is,
ducted system. Using sheet metal ductwork in transporting the fumes or smoke extracted to the
external atmosphere. It can be seen in the basement car park area, kitchen area and utility room
area.
Basement Car Park Area
For basement area, ductworks are evenly distributed around the car park, both ends with
mechanical extraction and the other end with mechanical supply ductwork and one also drop to
lower level to provide lower level extract points. Air is constantly supplied to basement and extract
out to the other end. Carbon monoxide or pollutants gas are extract from lower level of extract
points.
Supply and extract air is run by the fans located in fan rooms which located at both ends of
the basement. Two for running supply system and another two for exhaust system.
Accommodating large ductwork can be problematic due to low headroom in most car parks and
low-level ducts can be subject to damage from vehicles.
Figure4.3.3a: LOCATION OF FAN ROOMS (SUPPLY SYSTEM) IN BASEMENT 1.

Figure4.3.3b: LOCATION OF FAN ROOMS (EXTRACT SYSTEM) IN BASEMENT 1.
Figure4.3.3.d EXTRACT FAN IN
FAN ROOM
Figure4.3.3.c EXTRACT FAN RUNNING IN FAN
ROOM

Figure4.3.3.e DUCTWORK OF SUPPLY AIR IN BASEMENT 1
Supply Air
Figure4.3.3.f DUCTWORK OF EXTRACT AIR IN BASEMENT 1
Exhaust Air

Kitchen
The kitchen exhaust fan is for kitchen ventilation purpose. This system is only applicable
on F&B tenants and supermarket kitchen.
Tenant kitchen is a combination of centralized and individual duct system which means
some tenants’ lots are linked to the centralized duct system where some other are provided
individual kitchen exhaust and fresh air duct.
Centralized kitchen fans only provided to centralized kitchen exhaust duct system but not
for any kitchen fresh air system. All kitchen exhaust fans are being operated by BAS system.
All tenants are provided one set of black steel exhaust duct and G.I fresh air ducting which
is terminated with one volume control damper to adjust the amount of air flow within the tenants
which share the same centralized exhaust fan. Non-return damper is also installed at all exhaust
outlets to avoid flowing back of smoke.
Figure4.3.3.g: EXHAUST DUCTWORK AT KITCHEN AT 6TH FLOOR
Exhaust Air

Exhaust Airflow direction
Figure4.3.3.h Exhaust air flow from kitchen
itchen
Figure4.3.3.I Ductwork of exhaust air of kitchen
Figure4.3.3.J Natural air supply for kitchen area
The mechanical exhaust system is incorporated
with the natural supply air, which invited by the
dampers located at the roof level.
UBBL
Clause 99 cooking facilities in
residential building
2) Where a common vertical kitchen
exhaust riser is provided, the riser shall
be continued up to a mechanical floor
or roof for discharge to the open, and
shall be constructed with fire resisting
material of at least 2 hours rating with
BS476: Part 3.

Figure4.3.3.k Location of exhausts fans of kitchen at roof level
Figure4.3.3.l exhaust fan of kitchen located at roof level Figure4.3.3.m exhaust fan of kitchen located at roof level

4.4 Components
Fan
Ductwork
Damper
Filter
Thermostat Switch
Figure4.4.a components diagram of mechanical ventilation

4.4.1 Fan
Propeller Fan
Propeller fan is fan that uses airfoil shaped blade in converting rotational motion into thrust.
Pressure is produced between the forward and rear surface of the blade, and fluid is accelerated
behind the blade.
Propeller fans are usually located at every machinery room to remove heat produced by
the machine. Figure below showed the location of propeller fan in the chiller plant room. As chiller
plant room do not require high power fan, the light duty of propeller fan is used.
Figure4.4.1.b light duty propeller fan
Figure4.4.1.c Medium duty propeller fan
Figure4.4.1.d High duty propeller fan
Figure4.4.1.a Propeller fan at chiller plant room
Figure4.4.1.b Propeller fan at basement

Axial Flow Flan
An axial fan is a type of compressor that increases the pressure of the air flowing through it.
The blades of the axial fan forces air to flow parallel to the shaft about which the blade rotate. The
flow is axially, linearly, and hence their name. Axial fan is used for relatively high flow rate.
They are generally selected for simple extraction or cooling applications with very low
system resistance, such as moving air from one large space to another (i.e. from factory to outside),
desk fans and condenser cooling in refrigeration. The axial fans are located at the fan rooms at
basement and places of air exhaustion normally involve big machine.
FIGURE4.4.1.E LOCATION OF AXIAL FLOW FAN
FIGURE4.4.1.F AXIAL FLOW FAN FRONT VIEW FIGURE4.4.1.G AXIAL FLOW FAN SIDE
VIEW

4.4.2 Ductwork
Ductwork is used in mechanical ventilation in delivering and removes air. The needed
airflow include supply air, return air and exhaust air. As such, air ducts are one method of ensuring
acceptable indoor air quality as well as thermal comfort. A duct system is also called ductwork.
The ductwork used in galvanized ductwork. Galvanized steel is the most common material
used in fabricating ductwork. To provide insulation purpose, fiberglass in inserted in the ductwork.
FIGURE4.4.2.A BASEMENT CAR PARK DUCTWORK
FIGURE4.4.2.B KITCHEN DUCTWORK

FIGURE4.4.2.C BASEMENT DUCTWORK FIGURE4.4.2.D BASEMENT DUCTWORK
FIGURE4.4.2.E BASEMENT DUCTWORK FIGURE4.4.2.F DUCTWORK WITH LOWER
DIFFUSER
FIGURE4.4.2.G KITCHEN DUCTWORK

Poor designed ductwork may result in conditioned air being forced outside or outdoor air
drawn being into the house. This increases energy consumption by the machine and can result in
air quality and building pressure.
Ventilation ducts should not be passing through smoke-stop or fire fighting lobby. If
unavoidable, the part of ventilation duct within the lobby shall be enclosed with fire resistance
elements. Such construction shall be in masonry or shall be fitted with fire damper.
Poor designed ductwork may result in conditioned air being forced outside or outdoor air
drawn being into the house. This increases energy consumption by the machine and can result in
air quality and building pressure.
4.4.3 Fire Damper
Fire dampers are installed to prevent the passage of fire through walls or ducts from one
space to another. Fire dampers are compartmentation dampers.
Unless specially made for out-of-wall installation, fire dampers must be within the plane of
the wall they are protecting. For this reason, when combination fire and smoke dampers, discussed
below, are installed, jackshafts are used. (As shown in figure 4.4.3.a) This allows attaching the
actuator to the jackshaft where it is accessible from outside while the damper blades are still within
the wall plane. Many smoke dampers are jack shafted also as the same damper is used in the
combination fire and smoke application. However, a smoke damper may be installed up to two feet
away from the wall.
FIGURE4.4.3.A COMBINATION OF
SMOKES AND FIRE DAMPERS
FIGURE4.4.3.B FIRE AND SMOKE
DAMPERS IN CHILLER PLANT ROOM

Fire dampers shall not be fitted in any of the supply airshaft or extract airshaft. The smoke
purging system would fail, as the fire dampers when in closed position would prevent movement of
air within the shaft.
Fire dampers shall not be fitted in the following locations:
 Openings in walls of a smoke extract shaft or return air shaft which also serves as a smoke
extract shaft;
 Openings in walls of a protected shaft when the openings have a kitchen exhaust duct
passing through it; or
 Anywhere in an air pressurizing system
4.4.4 Filter
Filter is needed which normally located inside the ductwork to filter the inlet air from
outdoor or filter the outlet air before it goes to the atmosphere. In Jaya Shopping mall, fiberglass is
chose to filter the air because of its sound insulation function and considered as environmental
friendly as compare to polyester and synthetic material.
Figure4.4.4.a Fiberglass located in the ductwork

4.4.5 Diffuser
Diffuser is a mechanical device located at the end other duct system, controlling and
managing the air velocity before entering the occupy space. Diffuser can be found in various shape,
either round or rectangle or as linear slot diffusers.
When possible, the diffuser (inlets) need to avoid the location of extract air and dampers, and
located up far the stream. Functions of diffusers are as below:
 To deliver both conditioning and ventilating air
 Evenly distribute the flow of air, in the desired directions
 To enhance mixing of room air into the primary air being discharged
 Often to cause the air jet(s) to attach to a ceiling or other surface, taking advantage of the
Coandă effect
 To create low-velocity air movement in the occupied portion of room
 Accomplish the above while producing the minimum amount of noise
FIGURE4.4.5.A DIFFUSER OF EXHAUST
AIR FROM BASEMENT
FIGURE4.4.5.A DIFFUSER OF
PRESSURIZED STAIRCASE
FIGURE4.4.5.C DIFFUSER OF
BASEMENT (SUPPLY OR EXTRACT)
FIGURE4.4.5.D DIFFUSER OF
BASEMENT (LOWER LEVEL)

4.5 Conclusion
Mechanical ventilation in Jaya, Seksyen 14 shopping mall is considered moderate and
done in a traditional way. All the system is arranged in an organized way for example all the
ductwork is neatly hidden inside the ceiling. However, poor natural ventilation is considered in the
higher floor of Jaya shopping mall, as temperature is warmer compare to other place. Application
of ductwork system is good and common nowadays but with the introduction of the new way of
exhausting the air (Impulsion system-Jet fan), working time is shorter and low in maintenance.
Space of the basement will look wider if apply of new exhaust and supply system.
The ductwork may create lower ceiling and disturb the moving of people or air in case of
emergency. Fan system in Jaya is good as it uses thermostat in controlling the fan running system
percentage. If the temperature is not high, the fan will run 50% or less, resulting low energy
consumption. Most of the area is mechanical ventilation, resulted in little natural openings, which
will be a problem when fire occurred above the ground level, (insufficient natural inlet air). Overall,
Jaya shopping mall practice good mechanical ventilation and achieved thermal comfort in human
satisfy level.

5
CHAPTER
AIR-CONDITIONING SYSTEM

5.1 INTRODUCTION
Malaysia poses tropical rainforest climate which is generally sunny throughout the year
and have high precipitation rate every month. Hence, the thermal comfort in a building is having a
filtered supplied air, with a temperature range of 22 to 27 degree Celsius and relative humidity of
55-70%. In this hot and humid climate, air-conditioning system as part of the ACMV (Air-
Conditioned and Mechanical Ventilation) system is one of the crucial building service in most of the
buildings typically in Malaysia to provide thermal comfort.
Differ from mechanical ventilation, air-conditioning is considered as an active system that removing
heat from the air inside the room and releasing this collected heat into the air outdoors with the aid
of electrical supply and water supply (if building in large scale). Like other HVAC (Heating
Ventilating and Air Conditioning) technology, the role of air-conditioning do more that providing
acceptable indoor air quality and ensuring thermal comfort. It prevents smoke, dust and haze from
outdoors to protect human health and some are used as cooling device to chill electrical appliances
or machinery for better performance.
5.2 LITERATURE REVIEWS
Air-conditioners can be easily be found anywhere ranging from homes, restaurants, hotels,
offices, hospitals, factories, office to toilets, public transportation, kiosk and etc. They are designed
in different ways to accommodate different users’ need. Below are four types of air-conditioning
system:
1. Window Air Conditioning System
2. Split Air Conditioning System
3. Centralized Air Conditioning System
4. Packaged Air Conditioning System
In this project, we are asked to do a case study on a medium to large scale building with at
least 4 storeys height. We have found out that the most efficient method to manipulate and ensure
the building thermal comfort is by using the centralized air conditioning system. Like others, this
sophisticated air-conditioning system is made up of two major cycles: Refrigeration Cycle and Air
Cycle.
Refrigeration Cycle is a process of removing heat from one place to another.
The principles of Refrigeration are as follows: (Hoffman, 2006)
 Liquids absorb heat when changed from liquid to gas.
 Gases give off heat when changed from gas to liquid.
For an air conditioning system to operate with economy, the refrigerant must be used
repeatedly. For this reason, all air conditioners use the same cycle of compression, condensation,
expansion, and evaporation in a closed circuit. The same refrigerant is used to move the heat, to
cool, and to expel this heat in another area.
 The refrigerant comes into the compressor as a low-pressure gas, it is compressed and
then moves out of the compressor as a high-pressure gas.

 The gas then flows to the condenser. It then condenses to a liquid, and gives off its heat to
the outside air.
FIGURE 5.2a: THE DIAGRAM ABOVE SHOW THE PRINCIPLES OF BASIC REFRIGERATION CYCLE.
SOURCE: (Hoffman, 2006)
 The liquid then moves to the expansion valve under high pressure. The valve restricts the
flow of the fluid, and lowers its pressure as it leaves the expansion valve.
 The low-pressure liquid then moves to the evaporator, where heat from the inside air is
absorbed and changes it from a liquid to a gas.
 As a hot low-pressure gas, the refrigerant moves to the compressor where the entire cycle
is repeated. Creating a loop.
The average central air conditioning system is comprised of three main parts:
FIGURE 5.2b: COMPRESSOR FIGURE5.2c: EXAMPLE OF CONDENSER FIGURE 5.2d: EVAPORATOR –
COOLING COIL
SOURCE:http://www.directindustry.
com/prod/embraco/product-17666-
749055.html
SOURCE: http://www.ebay.com/itm/3-ton-
Goodman-a-c-GSC13-central-AC-unit-
Condenser-GSC130361-R-22-/390299572946
SOURCE:http://www.interstateair.co
m/cleaning-your-hvac-coils-in-nyc-is-
it-important/

Air Cycle is a process to distribute treated air into the room that needs to be conditioned.
Treated air means the air supply to the room is typically filtered through air cleaners to remove dust
and pollen particles. This is done by first absorbing the latent heat inside the room and transferred
it to the chilled water at the Air Handling Unit (AHU). The air is then mixed with fresh air from
outside and blow through the cooling coil to provide a lower temperature and cooler air supply to
the indoor. Distribution of air can be either through ductworks or chilled water pipes.
Below is a simple diagram obtained from other source but further enhanced with our own
annotations.
FIGURE 5.2e: THE AIR CYCLE IN THE CENTRALISED AIR-CONDITIONING SYSTEM.
SOURCE: http://www.iloencyclopaedia.org/part-vi-16255/indoor-environmental-control/79-45-indoor-environmental-
control/heating-and-air-conditioning-systems
Both cycle operate on their own close loops but they are not able to function if one of the
cycle break down. Hence, a throughout understanding of both cycle is required by the facilities
management officers to facilitate them even most of the controlling is done by the Building
Automation System today.
STEP 1:
RETURNING
AIR
STEP 2:
CLEAN AIR
INTAKE
STEP 5:
RELEASE
TO
INDOORS
STEP 4:
COOLING
AIR SUPPLY
STEP 3:
FILTER AIR
SUPPLY

5.3 CASE STUDY
Jaya shopping center consists of 8 storeys of shopping mall and 4 storeys of basement car
parks. The building is air conditioned by Chilled Water Air Handling Units (AHU), Fan Coil Units
(FCU) and Air Cooled Split Unit.
 There are 14 nos. of AHU are serving public area for complex and customer toilet.
FIGURE 5.3a: A.H.U. UNIT THAT IS SERVING AT THE JAYA
SHOPPING MALL FIRST FLOOR
FIGURE 5.3b : ROUND AIR DIFFUSERS ARE FOUND AT
THE CEILING OF THE MALL USED TO DISTRIBUTE AIR
FROM A.H.U.
FIGURE 5.3c: AIR FROM THE A.H.U. SUPPLY TO THE MALL INDOOR THROUGH DIFFUSERS
 Customer lift, every shop lots and escalator lobby at car park level and Female/Male
Prayer Room are served by chilled water fan coil units (FCU).

FIGURE 5.3d: FAN COIL UNITS THAT IS FOUND ON THE CEILING IN ONE OF THE SHOP LOTS.
 MDF room, refuse chamber room and fire control room are air conditioned by Air Cooled
Split Units.
FIGURE 5.3e: SAMPLE OF AIR COOLED SPLIT UNITS IN
FIRE CONTROL ROOM OF JAYA SHOPPING MALL
FIGURE 5.3f: SAMPLE OF AIR COOLED SPLIT
UNITS
SOURCE: http://yonanac99.en.made-in-
china.com/product/XqxEAzPUvOVT/China-Air-
Conditions-Unit-Split-Systems-110-.html

According to the Operation and Maintenance Manual, the table below shows the summary
the number of equipment in the Air-Conditioning system:
No. Components Numbers
1. Chillers (CH) 4
2. Water Pump Sets 14
3. Cooling Towers 4
4. Air Handling Units (AHU) 14
5. Chilled Water Fan Coils Units (FCU) 276
6. Air Cooled Split Units (ACSU) 6
Further explanation on each components will be made in chapter 5.4.
5.3.1 CHILLED WATER AND CONDENSER WATER SYSTEM
REFRIGERANT CYCLE
The Chilled Water and Condenser Water System is the refrigerant cycle in the air-
conditioning system of this building, consisting of the number of devices listed in the table below.
No. Components Numbers
1. Chillers (CH) 4
2. Three Cells Cooling Tower 2
3. Single Cell Cooling Tower 2
4. Primary Chilled Water Pumps 4
5. Secondary Chilled Water Pumps 4
6. Condenser Water Pumps 4
The chillers and pumps are located at roof level (refer to FIGURE). The chilled water
pumps circulated chilled water from chiller side to every Air Handling Units (AHU) and Fan Coil
Units (FCU). However, condenser water pumps circulated condenser water from chillers to cooling
towers in order to reject the heat released from chiller.
In this primary-secondary system, each chiller in the primary loop starts/stops with its
dedicated pump. Flow for each chiller in the primary loop is maintained by water circulating through
the chiller and back through the bypass which acts as a hydraulic decoupled line, or “bridge”.
Water can flow in either direction within the bridge depending on which flow is greater at any one
point in time, the primary flow or the secondary flow.
Variable speed drives are used on the secondary pumps to match secondary pump flow to
coil load flow demand. The chilled water pumps supply chilled water to air conditioning equipment
in the building. This circuit is connected to all the AHUs, FCUs, chilled water pumps and chillers.
The chilled water is pumped from the chiller, by the chilled water pumps and circulated to
all the AHUs and FCUs in the building via one set of pre-insulated black steel class “B” chilled
water piping system. The chilled water after passing through cooling coil is then flowed back to
chillers again, forming a chilled water circulation.

FIGURE 5.3.1a : SCHEMATIC DIAGRAMS OF CHILLED WATER AND CONDENSER WATER
SYSTEM

Before the chilled water is circulated to the building AHUs and FCUs, the chilled water is
passing through flow meter and temperature sensor (refer to FIGURE) where BTU consumption
of the building is measured. There is one number of BTU meter is installed for Cineplex. BTU
meters measure the energy content of liquid flow in British thermal units (BTU), a basic measure of
thermal energy. (Customer Services - What is a BTU meter, 2015) BTU meters are used in chilled
water system for both commercial, industrial and office buildings. These meters are used to bill
users for energy usage.
FIGURE 5.3.1b: THE TEMPERATURE SENSOR LOCATED ALONGSIDE THE PUMP SET
AND PRESSURE GAUGE TO MEASURE THE REFRIGERANT STATE
The condenser water pumps supply condenser water to chillers in chiller plant room. This
circuit is connected between chillers and cooling towers which are located at the roof. The
condenser water is circulated between chillers and cooling tower via one set of GI class “B”
condenser water pipe.
FIGURE 5.3.1c: LOCATION OF THE CHILLER PLANT ROOM SHOWING ON THE SIXTH FLOOR PLAN
SOURCE: Jaya Shopping Mall Facilities Management

FIGURE 5.3.1d: ENTERING THE CHILLER PLANT ROOM AT THE ROOF TOP
The heat rejection of AHUs and FCUs is passed through chilled water to chillers. The
chiller subsequently transferred the heat from chilled water side to condenser water side. The
warm return chilled water from AHUs, entered the chillers will then be chilled by chilled water, the
refrigerant liquid transform to vapor condition. This refrigerant vapor is then passed through
compressor in which further compression is occurred at this stage. The refrigerant vapor will
become very warm and is flowed through condenser chamber.
Here, the heat from refrigerant vapor is transferred to cold supply condenser water. After
absorbing heat from refrigerant vapor, the hot condenser water is return back to cooling tower via
condenser water pipe. The hot condenser water is discharge into distribution basin with patented
intricate design in the cooling tower.
FIGURE 5.3.1e: CHILLED WATER SUPPLY/ RETURN
WATER PIPES FOUND ON THE CEILING OF EACH
SHOP LOTS
FIGURE 5.3.1f: HOT CONDENSER WATER IS COOLED
AT THE BASE IN THE COOLING TOWER

Meanwhile, the cooling tower fan drew air from atmosphere into the cooling tower. This air
is drawn cross flow to the hot condenser water and absorbed the heat from it. This process is
called evaporation. After absorbing heat from the hot condenser water, this hot air is discharge to
the atmosphere via the cooling tower fan. Once, the hot water is cooled by the air, it dropped to
cold water basin and is then re-circulated back to chillers, thus forming a condenser water
circulation.
AIR CYCLE
The air cycle of the air-conditioning system involves the AHUs and FCUs. The AHUs are
located at various AHU room located from Lower Ground to 5th Floor. Conditioned air from the AHU
is supplied to the space via an insulated of sheet metal reticulation supply ductwork system. The
duct is constructed of rectangular metal sheet ductwork. The supply air after flowing through the
ductwork is distributed and discharged to the space by several air diffusers such as jet diffuser for
center court and round air diffuser for else.
FIGURE 5.3.1g: SCHEMATIC DIAGRAM SHOWING THE NUMBER OF AHU
AND FCU AT ONE FLOOR – LEVEL ONE
SOURCE: Jaya Shopping Mall
Return air from the conditioned space is returned to the AHU via the ceiling return air slot
surround the complex corridor, then passing through ceiling and finally returned to AHU room. The
return air is then mixed with fresh air before entering the cooling coil. Fresh air is drawn into the
AHU room through a fresh air grille that connecting the AHU room to external building. This fresh
air grille will be completed with volume control damper which can be adjusted manually by a driving
shaft to control the fresh air volume entered into the AHU room.

FIGURE 5.3.1h: IMAGES FROM THE BUILDING AUTOMATITION SYSTEM SHOWING THE MONITORING OF THE
RETURNING AIR
The resultant air mixture is drawn through the filter to remove dust particles prior entering
the AHU. On leaving the filters, the air is drawn through a chilled water cooling coil, and is cooled
before passing through the AHU blower into the supply air duct system. Building Automatication
Service (BAS) will monitor the condition of filters. Once the washable filter is full of dirt and create
high pressure differential between in or out of filter, it will activate filter alarm in the BAS system to
indicate the need of filter cleaning.

5.3.2 AIR COOLED SPLIT PACKAGE SYSTEM
Due to independent usage of air conditioning requirement, air cooled split package system
is provided for
1. Fire control room
2. Main Distribution Frame (MDF) room
3. Refuse Chamber room
Each of the above air cooled split unit comprised of an indoor (fan coil) and outdoor
(condensing unit).
The indoor unit is installed inside the designed room with outdoor unit located outside the room as
shown in the as-built drawing. The conditioned air is directly blown into the room space and return
back into the washable air filter of the unit that form a circulation of air. The filter is used to remove
any particles of dirt to provide a clean air circulation system within the room.
The condensing units are located outside of air conditioned room and discharge hot air to
atmosphere. Room temperature is cooled down by means exhausting heat energy from the room
by the indoor unit through refrigerant system and discharge out to atmosphere via outdoor
condensing unit.
The three rooms above are each served by two air cooled split units. These two units
operate one at a time, controlled by an auto changeover and a 24 hours timer. The timer is set to
interchange the units at a twelve hours interval. This is to ensure that all the units are used and ran
regularly. These air-conditions are operated by a controller to switch on/off or setting desired
temperature.

FIGURE 5.4a :INTRODUCTION IMAGE OF THE COMPONENTS AND REFERRED CHAPTER
SOURCE: http://img.bhs4.com/FC/B/FCBCF2A5FF950F36EEFD0AF8648F4C278BEF622E_large.jpg
UBBL-SECTION 41
(3) The provisions of the Third Schedule to these By-laws shall apply to buildings which are
mechanically ventilated or air-conditioned.

5.4.1 Refrigerant Cycles
5.4.1.1 Water Tanks
FIGURE 5.4.1.1a : ROOF PLAN (WATER TANKS)
An air-conditioning (AC) make up tank is located at roof top which is near to the cooling
tower. This is to make up condenser water system if there any water loss due to cooling tower
operation and maintenance or other reasons. The water from make-up tank is being supplied to the
cooling tower basin by a centrifugal pump set
Although chilled water piping system is a closed loop, an expansion tank has been
incorporated into the system as well to allow water expansion and contraction due to the changes
in temperature. The expansion tank is made of Fiberglass Reinforced Polyester (FRP), insulated
with 25mm think external PE insulation with transparent PVC tubing hose for level indication and
outlet pipe (insulated) is connected to chilled water return line. It has an overflow pipe that lead to
drain.
FIGURE 5.4.1.1b : WATER TANKS THAT IS MADE
FROM HARD PLASTICS, RESISTED FROM WEAR AND
TEAR
FIGURE5.4.1.1c : WATER TANKS USUALLY SITUATED
AT THE ROOFTOP

5.4.1.2 Cooling Tower
FIGURE 5.4.1.2a ROOF PLAN (COOLING TOWER)
There are a total of 8 cooling towers on the roof top level of Jaya Shopping mall. The
cooling towers used are the TX-S Series Cooling Tower from Truwater which emphasizes on
energy saving super low noise. TX-S Series is an induced draft cross flow, film filled, FRP multi cell
rectangular cooling tower designed for the equipment cooling, industrial process cooling and air
conditioning applications.
Upon entering the condenser, the temperature of water will rise because of heat
absorption from the condenser’s refrigerant. From the cooling tower, hot water is then directed to
rise beyond the top then exits through existing holes in the sprinkler. The sprinkler will then rotate
while removing water and distribute it evenly to the top of the cooling tower. Water that is sprinkling
out from the sprinkler is then going down to the bottom of the cooling tower, while the air enters
from the bottom to the next exit which is the top. When water and air contacts, heat will be released
from the water hence lowering its temperature. Cold water is then accommodated in the bottom of
the cooling tower’s basin and circulated again to the condenser so it can absorb heat again.
FIGURE 5.4.1.2b: VIEW INSIDE THE COOLING TOWER FIGURE 5.4.1.2c : REAR VIEW SHOWING THE
PENETRATABLE WALLS OF THE COOLING TOWERS
TO ALLOW AIR PASS THROUGH

FIGURE 5.4.1.2d : COMPARTMENTS OF THE COOLING TOWER
SOURCE: Jaya Shopping Mall Facilities Management

FIGURE 5.4.1.2e : SECTIONAL PERSPECTIVE OF THE COOLING TOWER
SOURCE : Jaya Shopping Mall Facilities Management
FIGURE 5.4.1.2f : DETAIL AND MEASUREMENTS OF THE COOLING TOWER

5.4.1.3 Chiller Plants Room
FIG 5.4.1.3a : ROOF PLAN (CHILLER PLANT ROOM)
The chiller plant room in Jaya Shopping Center can be found in Level 6 of the mall
(FIGURE 5.4.1.3b). The chiller plant room is a designated area for water to be chilled and
distributed to A.H.U. through ductworks. The chiller plant room is being situated beside the Station
Transformer and Low Voltage Room. The chiller plant room consists of chillers, switchboard units,
chilled water ducts, ductworks, refrigerants and a F.C.U.
FIGURE 5.4.1.3b : AREA OCCUPIED BY THE CHILLER PLANT ROOM AT THE MEZZANI FLOOR

5.4.1.4 Chiller
FIGURE 5.4.1.4a: SMALL CHILLER UNITS
FIGURE 5.4.1.4b : LARGE CHILLER UNITS
The chiller plant room in Jaya shopping center consists of 2 large and 2 small chiller units. The
large chiller unit mostly functions in the morning while the smaller units are switched on during the night to
reduce energy consumption. This is because at night, the heat flow of human traffic and heat from the sun is
reduced.
The chillers and pumps are located at roof level. The chilled water pumps circulated chilled water
from chiller side to every A.H.U. and fan coil units. However, condenser water pumps circulated condenser
water from chillers to cooling towers in order to reject the heat released from chiller.
MS 1525:2007
8.2.2 Where chillers are used and when the design load is greater than 1000 kWr, a minimum of
two chillers or a single multi-compressor chiller should be provided to meet the require load.

FIGURE 5.4.1.4c : CONDENSER AND COOLER OF A CHILLER
FIGURE 5.4.1.4d : THE DIMENSIONS OF THE PARTS INSIDE

FIGURE 5.4.1.4d : THE COMPARTMENTS INSIDE OF A SINGLE CHILLER UNIT

FIGURE 5.4.1.4e : FRONT VIEW OF THE CHILLER
FIGURE 5.4.1.4f : REAR VIEW OF THE CHILLER

FIGURE 5.4.1.4g : COMPRESSOR COMPONENTS OF THE CHILLER

5.4.1.5 Control Unit
FIGURE 5.4.1.5a : ROOF PLAN (CONTROL UNIT)
The chilled water flow rate of the system is determined by a series of sensors and control. First of
all, the chilled water flowing into the AHU coil is controlled by modulating the motorized control valve, which
is determined by space temperature sensors located inside conditioned space or return air temperature
sensors mounted on the duct. The chilled water flowing through the FCU coil is controlled by an ON/OFF
motorized control valve, which is determined by room thermostat located inside the conditioned space.
The complete chilled water system is controlled by HVAC BAS system. The chiller is built-in-with
ISM (Integrated Started Module) controller which will monitor and control the operation status of condenser
water pump, chilled water pump and cooling tower. In order to start-up the chilled water system, first step is
to start the chiller from HVAC BAS system, Once the chiller received signal from BAS system, it will not
operate immediately. At first, the chiller will energize ISM controller and it will call chilled water pump to start
first. After a few seconds, cooling tower motorized valve will open. Once the valve open contact is activated,
then only condenser water pump will start. Once the chiller detects a flow in the chilled water system, it will
start automatically by itself. After all only the cooling tower fan will start. After the chilled water system has
been in full operation, it will regulate the compressor to full load or partial load based on the total building
cooling load required.
FIGURE 5.4.1.5b : PANELS OF CONTROL UNITS IN
THE CHILLER PLANT ROOM
FIGURE 5.4.1.5c : EACH OF THE CONTROL A SINGLE
CHILLER, PUMPSET, COOLING TOWER AND ETC.

FIGURE 5.4.1.5d : SEQUENCE IN SWITCHING ON THE CHILLER WATER SYSTEM
MS 1525:2007
8.3.1 Zones which are expected to operate non-simultaneously for more than 750 hours per
year should be served by separate air distribution systems. As an alternative off-hour controls
should be provided in accordance with 8.4.4
8.4.4.1 ACMV system should be equipped with automatic controls capable of accomplishing a
reduction of energy use for example through equipment shutdown during periods of non-use or
alternative use of the spaces served by the system.

5.4.1.6 Water Pump Sets
FIGURE 5.4.1.6a : ROOF PLAN (CHILLER PLANT ROOM)
The water pump sets are located on the 6th floor of Jaya Shopping Center. It functions as a pump
to return warm chilled water to the chiller, and also pumps water to every A.H.U. room.
FIGURE 5.4.1.6b : Condensed Water Supply/Return
(CDWS/CDWR) collects the water from A.H.U. or F.C.U.
AND SEND TO COOLING TOWER
FIGURE 5.4.1.6c : PRESSURE GAUGE AND
TEMPERATURE SENSOR IS PLACED AT THE
PUMPSETS

FIGURE 5.4.1.6d : DETAIL DRAWINGS OF THE WATER PUMPSET

5.4.2 AIR CYCLE
5.4.2.1 AIR HANDLING UNIT (A.H.U.)
An Air Handling Unit is a central air conditioner station that handles the air that,
usually, will be supplied into the buildings by the ventilation ductwork (connected to the
AHU). It is usually have a casing ( box ) constructed by a framing system and double skin
insulated panels. Framing materials are commonly galvanized steel or Aluminum.
(AHUmag, 12)
FIGURE 5.4.2.1a: A.H.U. STRUCTURE FIGURE 5.4.2.1b: INSIDE THE A.H.U. ROOM
To be considered as an AHU a minimum of components must considered, to know: at
least 1 filtration section, 1 heat transfer component (cooling / heating coil) and 1 fan.
FIGURE 5.4.2.1c: CARRIER BRAND AS THE BRAND
USED BY JAYA SHOPPING MALL
FIGURE 5.4.2.1d: REAR VIEW OF THE A.H.U.

FIGURE 5.4.2.1e: HVAC PLAN AT LEVEL TWO SHOWING THE LOCATION OF THE A.H.U. AT ONE FLOOR
An A.H.U. is placed at each floor to ensure air supply as shown in the plan above. It is kept
inside the A.H.U. room together with other components like clean air intake ducts and
returning air ducts.
There are different types of configuration for an AHU such as Incline, Double-Deck, Side
by Side, U-shape and L-shape. In our case study, the AHU is an Incline – Supply Mixed Air
as shown as the diagram below.
FIGURE 5.4.2.1f: CONFIGURATION: INCLINE – SUPPLY MIXED AIR
SOURCE: http://www.ahumagazine.com/air-handling-unit-definition-and-configuration-types/
SHOP LOTSA.H.U. ROOM

5.4.2.2 AIR FILTER
An air filter is used to clean the incoming air by filtering out the pollen particles,
dust and air pollutants before it is released into the room. The filters should be replaced
regularly to ensure proper function and maximize system operation. Keeping filters and
coils clean can dramatically improve the efficiency of the entire HVAC system.
FIGURE 5.4.2.2a: PANELS OF FIBERGLASS
ROLLS FOUND INSIDE THE A.H.U.
FIGURE 5.4.2.2b: PANELS ARE REPLACED ON
REGULAR BASIS
There are different types of air filters such
as Fiberglass filter, Polyester and pleated filters,
High efficiency particulate arrestance (HEPA)
filters, Washable air filters and etc depends on
various usage. In our case study, Fiberglass filter
is applied because of its advantages of low cost,
easy to install, high separation efficiency and
supply rolls or cut to pads. Layered fiberglass
fibers are laid over each other to form the filter
media and typically are reinforced with metal
grating that supports the fiberglass to prevent
failure and collapse. (Winterland, 2009)
FIGURE 5.4.2.2c: FIBER GLASS
FILTER ROLLS ALSO KNOWN AS
THROWAWAY AIR FILTER
SOURCE:http://www.pearlfiltration.com.
au/thumbnaillarge/fiberglassmediaimage
.jpg

5.4.2.3 BLOWER FAN
The aim of the blower fan inside the A.H.U. is to propel air from one place to
another place, directing the air from one ductwork to another ductworks to ensure the
system works effectively. The size of the blower fan depends on the usage like in large
commercial A.H.U., multiple fans may be present, typically placed at the end of the A.H.U.
and the beginning of the supply ductwork.
FIGURE 5.4.2.3a: BLOWER FAN SITUATED AT
THE LOCATION THAT
SOURCE: https://knoji.com/images/user/belts-ahu-
diagram.jpg
FIGURE 5.4.2.3b: STRUCTURE OF A SMALL
COMPACT BLOWER FAN
SOURCE:http://cdblower.com/images_gellary/b6
9719d0f5c4234e6be19ff63d7f0ff5Air%20Handlin
g%20Unit%20Blowers.jpg
FIGURE 5.4.2.3c: Situated at the lower part of the A.H.U. and moved the air going upward
connecting to the ductworks.

5.4.2.4 DUCTWORK AND DIFFUSERS
The job of a ductwork is to distribute supply air, return air, and exhaust air to
various part of the building, normally medium to large scale industrial or commercial
building. It is used when a forced air system is implied. Ducts are a series of sectioned
conduits, or tubes, manufactured from tin, or sheet metal, fiberglass or flexible plastics.
They are ordinarily thought of as the building’s HVAC system. Hard pipe, used to transfer
water or gas, is not considered ductwork.
FIGURE 5.4.2.4a: TIN AIR DUCT
SOURCE: http://www.ebay.com.au/bhp/ducted-air-conditioner
Most of the ductwork for air conditioning poses high insulating properties to ensure the
temperature of the chilled air remains low before it is released to the room. Ducts are often
among the first items to consider when designing a new building, or when purchasing an
existing structure. (What is Ductwork, 2015)
FIGURE 5.4.2.4b: DUCTWORK CONNECTED TO THE A.H.U BRINGING IN THE RETURNING AIR AND ANOTHER
BRINING IN FRESH AIR FROM OUTSIDE.

Again, size matters. Different sizes and shapes of the diffusers actually serve various
performance rather than just aesthetic values. Some diffusers are big enough to service a
couple of rooms simultaneously. Others like circular diffusers are designed to service large
areas and rectangular diffuser are the most common one installed around the perimeter of
a room because of its slender shape.
FIGURE 5.4.2.4c: TYPES OF DIFFUSERS
SOURCE: http://www.deadeddy.com/images/aircon-diffusers.jpg
Jaya shopping mall has applied the use of Jet Diffuser and Round Diffuser for air
distributing. Both of them look similar but serve different function.
FIGURE 5.4.2.4d: JET DIFFUSER
SOURCE:http://www.dasco.net/images/pdf/dasco_
round_diffusers.pdf
FIGURE 5.4.2.4e: ROUND DIFFUSER
Designed to deliver jet type stream of air
for horizontal discharge applications such
as theaters, auditorium and large
assembly halls. It can be used for vertical
discharge where extensive duct work is
not required. (DASCO, 2000)
Designed to deliver air in a reasonably uniform and
horizontal pattern. The design consists of a conical
core followed by continuously concentric rings to
adjust the air flow pattern. It provides excellent air
distribution efficiency.

FIGURE 5.4.2.4f: SECOND FLOOR PLAN WITH INDICATION OF THE ROUND DIFFUSERS LOCATION
5.4.2.5 FAN COIL UNITS (F.C.U.)
Chilled water fan coil units are provided to serves all carpark lift and escalator
lobbies and all the tenants. For lobbies, ductwork system is provided together with chilled
water fan coils. Each of the FCU comprised of a filter, chilled water cooling coil and a
double inlet, double with centrifugal supply air fan, all of which are housed in an insulated
sheet metal housing from factory.

FIGURE 5.4.2.5a : THE BRAND OF FCU THAT IS USED IN JAYA SHOPPING MALL
Conditioned air from FCU is supplied to the space via the ductwork system. The
supply air after flowing through the ductwork is distributed and discharged to the space by
air diffusers. Return air from conditioned area is returned to the FCU via the return air grille.
FIGURE 5.4.2.5b : LOCATION OF THE F.C.U. IN EACH RETAIL STORE, AT SECOND FLOOR LEVEL
SOURCE : Jaya Shopping Mall

5.5 CONTROL SYSTEM
The complete chilled water system is controlled by HVAC BAS system. The chiller is built-
in with ISM (Integrated Starter Module) controller which will monitor and control the operation
status of condenser water pump, chilled water pump and cooling tower. In order to start-up the
chilled water system, first step is to start the chiller from HVAC BAS system. Once the chiller
received signal from BAS system, it will not operate immediately.
At first, the chiller will energize ISM controller and it will call chilled water pump to start first.
After a few seconds, cooling tower motorized valve will open. Once the valve open contact is
activated, then only condenser water pump will start. Once the chiller detected a flow in the chilled
water system, it will start automatically by itself. After all only the cooling tower fan motors will start.
After the chilled water system has been in full operation, it will regulate the compressor to full load
or partial load base on the total building cooling load required. Figure 5.5a shows the flow chart of
chiller control.
HVAC BUILDING AUTOMATION SYSTEM
Most of the above systems have provision to interface ith HVAC BAS sub-system. The
chilled water system for air conditioning is designed to operate by BAS. the BAS controls chillers,
air handling units, fan coil units and air cooled split units via interfacing wiring connected to the
equipment's respective switchboard.
In addition to operating the above chilled water system equipment. BAS can also read the
room temperature, chilled water supply and return temperature, chilled water pressure and water
flow rate.
Building Automation System (BAS) provides monitoring and controls of the building
services installed in the building. It collects data, performs alarm analysis schedules equipment
operations and provides interfacing to other services such as fire alarm monitoring.
The justification in installing a BAS system are numerous, namely central monitoring and
controlling, energy management analysis tool, prolong equipment life, manpower savings, etc. The
net effects on operations in maintaining a large building are fewer personnel but more highly-skilled,
less use of feet with more use of brains, users gain in understanding of building system, more
sophisticated troubleshooting.

5.6 CONCLUSION
In a nutshell, the HVAC system of Jaya Shopping has complied with the standards set by the
government by following the By-Laws stated in the UBBL SECTION 41 and guidelines provided in MS1525.
Sufficient equipment, backup plans and regular maintenance basis is planned and designed for the building.
According to MS1525 SECTION 8.2.2 which stated that “where chillers are used and when the
design load is greater than 1000 kWr, a minimum of two chillers or a single multi-compressor chiller should
be provided to meet the required load.” In this case, Jaya shopping malls has prepare four chillers on its
rooftop, two with larger capacity and another two lower. During the day, one main chiller will be switch on
and it is adequate enough to supply conditioned air to the five stories mall whereas at night, the main chiller
will be replaced with one small chiller because the main contribution will go to the cinema. The other part of
the mall will not require as much chilled air as the day due to the low temperature at night.
FIGURE 5.6a : INFORMATION FOUND ON THE CHILLER OPERATION MANUAL
SOURCE : Jaya shopping mall facilities management
Hence, the function of having two chillers of two capacities is to allow interval usage. The chiller is
changed each week and operates to ensure its quality. In our opinion, this is a good strategy because it will
prevent the machine from aging and malfunction due to the lack of performing.
In the section Off-Hours Control, Section 8.4.4.1 has mentioned that ACMV (Air-Conditioning
Mechanical Ventilation) system should be equipped with automatic controls capable of accomplishing a
reduction of energy use for example through equipment shutdown during periods of non-use or alternative
use of the spaces served by the system. In this report chapter 5.5, it has discussed the Building Automation
System used by Jaya Shopping Mall which has allow full control on the system in front of the computer
screen. The temperature sensors and pressure gauge have further enhanced the system. For example, the
power of the air-conditioner will increase in percentages if the returning air from the room is lower from the
value set in the BAS.
FIGURE 5.6a : INFORMATION FOUND ON THE CHILLER OPERATION MANUAL
SOURCE : Jaya shopping mall facilities management

6CHAPTER
FIRE PROTECTION SYSTEM

6.1 Introduction
Fire is the rapid, oxidation of a material in the exothermic chemical process of combustion,
releasing heat, light and various reaction products. Basically, a fire is a chemical reaction in
which a carbon based material (fuel), mixes with oxygen (usually as a component of air), and is
heated to a point where flammable vapours are produced. These vapours can then come in
contact with something that is hot enough to cause vapour ignition, and a resulting fire. In
simple terms, something that can burn touches something that is hot, and a fire is produced.
Fire is very dangerous as not only can it cause collateral damage to a building when it spreads
but it can also cause people to lose their life. Fire protection consist of methods to prevent fire
from turning destructive and also to minimize the impact of the uncontrolled fire to reduce harm
or damage. Safety planning practice and drills are included as well as education in fire,
research, investigation, safety planning, building construction, safe operations, training and
testing of mitigating systems (Cuthbert, 2015).
6.2 Literature Review
There are two basic systems for fire protection which are namely passive and active fire
protection system. Design and infrastructure, materials used, provision of isolating fire, fire
walls and doors of the building that takes fire protection into consideration can be classified as
passive fire protecting. Active fire protection consist of manual or automatic detection of fire,
use of fore and smoke alarms, firefighting as well as first aid (Nulfire, 2014).
Active Fire Protection
Active fire protection is the process of protecting a building or structure from fire with methods
that use the action of moving parts. These system can be automatic or operated manually, but
they require some sort of action in order to work. A couple of example of active fire protection
would be building sprinkler system and fire alarm systems. These system are an extremely
important part of protecting property and the lives of the people within.
According to Nulfire (2014), the overall aim of active system is to extinguish fire by detecting
the fire early and evacuating the building, alerting emergency services at an early stage of the
fire, control the movement of smoke and fire and suppress and starve the fire of oxygen and
fuel.
There are several systems in the active fire protection.
Sprinkler System
Sprinkler system consist of a water supply system that provides to a series of water pipes. At a
selected interval along the pipe, there are independent valves known as sprinkler heads. The
sprinklers are usually activated by heat from fire, resulting a discharge of water into the fire
area
Hose Reel System
The hose reel system is intended for the early stages of a fire for the occupants of the building.
It is to provide the occupants with first aid means of fighting a fire whilst awaiting the arrival of
the local fire service. When the hose reel is used, the pressure of the pipe will drop below the

field adjusted pressure setting of the pressure switch. This will trigger the pump to come into
operation automatically to feed a steady supply of water to discharge through the hose.
Water Riser System
Wet riser is a vertical pipe installed in a building for firefighting purposes internally and
permanently charged with water from a pressurized supply, and fitted with landing valves on
various floors. The provision of a built-in water distribution system means that fire fighters do
not need to create their own distribution system in order to fight a fire and avoids the breaching
of fire compartments by running hose lines between them.
Fire Alarm System
A key aspect of fire protection is to identify a developing fire emergency in a timely manner,
and to alert the building's occupants and fire emergency organizations. This is the role of fire
detection and alarm systems. A fire alarm system is number of devices working together to
detect and warn people through visual and audio appliances when smoke, fire, carbon
monoxide or other emergencies are present and allow appropriate firefighting action. These
alarms may be activated from smoke detectors, and heat detectors. They may also be
activated via manual fire alarm activation devices such as manual call points or pull stations. As
all systems are designed primarily to protect life and property, this places a great responsibility
on the designer because each building will have different risk and set of problems that are
related to the spreading of fire. Therefore, each fire detection and alarm system needs to be
designed specially to meet those requirements.
Fire Suppression System
Fire suppression systems are used to protect special hazard or sensitive area, like bank and
computer rooms. The use of conventional fire sprinkler systems may be appropriate for special
hazard area as it might cause the fire to be bigger or cause more damage to the situation. Fire
suppression systems are environmentally friendly clean agents.
Fire Extinguisher System
Portable fire extinguishers are important to fire prevention as most fire starts small and can be
easily extinguished. It is designed to be operated easily by anyone who follows simple
introductions labelled on the extinguishers. The type of fire extinguisher used depends on the
type of fire that is in the area.

Passive Fire Protection
Using effective measures against fire is not at all a new idea! Since many decades it is
systematically followed in the field of Industrial plants, storage facilities, warehouse
departments and public assembly places.
One of the most effective method against fire in a building is the use of passive fire protection.
It is defined as systems that are included as part of the very fabric of buildings with fire resistant
walls floors and doors serving all as examples.
The passive fire protection begins at the design and concept stages which includes, providing
fire evacuation routes and fire appliance access. In addition to this, the use of fire resistant
materials in walls and floor with providing groups and compartments is also considered as
passive fire protection. It is important to note that each mentioned area has a variety of different
solutions that are suited to varying build requirements. For example, in case of fire resistant
walls, it can be constructed using panels of reinforced cement with steel sheets bonded to each
side or through the application of a cementitious fire spray.
Considering all this, it is important to use passive fire protection in the building in the modern
day. Alfred Haack states that passive fire protection can avoid structural disintegration and can
reduce spalling. (Haack, 2013) Therefore, it is essential to have a fire safety concept with best
evacuation routes for a successful escape in order to provide optimum safety for the building
users.

6.3 Case Study
Active fire protection is compulsory building and our chosen building for the case study, Jaya
Shopping Centre is not exempted. There are several types of system that are used in Jaya
Shopping Centre that benefits the users during a fire emergency. The following list shows the
types of systems that are found in the building and will be discussed further in this chapter with
the various components that are used.
1. Fire Alarm System
2. Sprinkler System
3. Hose Reel System
4. Wet Riser System
5. Carbon Dioxide Fire Suppression System
6. Fire Extinguisher
The active fire protection system at Jaya Shopping Mall can be summarised in the
following diagram.
FIGURE 6.3a SMOKE DETECTOR ON CEILING

This sections explores the methods used as passive fire protection, in Jaya Shopping Center,
Jalan 14/17, Seksyen 14, 46100 Petaling Jaya, Selangor. Table 6.3b shows the methods which
would be further discussed.
1 Fire Evacuation Route
2 Fire Staircase
3 Fire Rated Door
4 Fire Rescue Access
5 Command and Control Center
6 Smoke and Heat Ventilation System
7 Smoke Curtain
8 Smoke Barrier Gate
Table 6.3a : List of Passive Fire Protection System
Each of the methods would be further deliberated in terms of how it functions and the purpose
it serves to the users in the building.
FIGURE 6.3b OVERVIEW OF PASSIVE FIRE PROTECTION USED IN JAYA SHOPPING CENTER

6.4.1 FIRE ALARM SYSTEM
6.4.1.1 Overview
The fire detection and alarm system used in this building is an addressable type. At the escape corridors
and also car park areas, fire alarm bell and manual call points are provided. Smoke detector are also
located around the building including the lift lobby and fire escape routes.
The main fire alarm panel is located at the control room. All control and indicative equipment from each
respective building level reception, indication, control and relaying of signals from fire detectors or manual
call points connected to it are terminated at the main fire alarm panel. Other suppression systems such
as sprinkler system are also monitored by the fire alarm system.
A Centralized Monitoring System (CMS) is equipped to the fire indicative panel at the fire control room
and has a direct telephone line to the BOMBA.
6.4.1.2 Components
6.4.1.2.1 Smoke Detector
A smoke detector is a requirement for all building. It is
a device that senses smoke, typically as an indicator
of fire. Smoke detectors are located at alternate
positions to detect smoke and temperature rise in an
event of a fire.
SMOKE DETECTOR
FIGURE 6.4.1a SMOKE DETECTOR ON CEILING
FIGURE 6.4.1b LOCATION PLAN OF SMOKE DETECTORS
UBBL- SECTION 225(1)
Every building shall be provided with means of
detecting and extinguisher fire and alarms
together with illuminated exit signs in accordance
with the requirements as specified in the tenth
schedule to these by-laws.

There are two types of smoke detector – optical smoke detectors and ionization smoke detectors. The
ones used at Jaya mall is optical smoke detectors. Optical smoke detectors are screwed to the ceiling as
that is where smoke moves. The detector has a large opening at the bottom where smoke can enter. In
the smoke detector, there is an invisible infrared light beam that shoots on a photocell. The photocell is
an electronic light detector that will generate electricity as long that lights fall on it. During a fire breakout,
smoke will travel into the detector and block the emission of light that shoots onto the photocell. No light
falls on the photocell, thus no electricity is generated. The circuit spots it straight away and triggers the
alarm
There are some rooms where a lot of dust is present.
In these rooms, the smoke detectors are covered with
a layer in order to prevent the detectors to be stuck
with dust and also prevent the detector from detecting
the dust as smoke and setting a false alarm. From
figure 6.4.1d the locationg of the covered smoke
detector can be seen that it is only present in the fan
rooms.
FIGURE 6.4.1d COVERED SMOKE
DETECTOR
FIGURE 6.4.1e LOCATION PLAN OF COVERED SMOKE DETECTORS AT BASEMENT 1
FIGURE 6.4.1c OPTICAL SMOKE DETECTOR
Source: http://www.scfpd.us/items/detector6.gif

6.4.1.2.2 Alarm Bell & Break Glass
The alarm bell is placed around the mall to ring to
warn people incase of a fire. The alarm rings at
103db (A) which is loud enough and can be heard in
any noisy situation. The alarm will continue to sound
until it is reset at the main control panel.
The bell is mounted with its striker pointing downwards. The
bell is designed professionally to meet the needs of firefighting
and the detection systems with central control equipment, the
simplicity of the design incorporates fewer working parts, thus
encouraging easy installation and high level of efficiency
capable in operating under the most adverse conditions
(Demco Industries Sdn Bhd, n.d).
FIGURE 6.4.1f ALARM BELL AND GLASS BOX
ALARM BELL
GLASS BOX
FIGURE 6.4.1g LOCATION OF ALARM BELLS AND GLASS BOXES
UBBL- SECTION 237
Alarm bell must be provide a minimum sound of
level 65db (A) or +5db (A) above any
background noises, which is likely to persist for
more than 30 seconds.
FIGURE 6.4.1h SPECIFICATION OF A DEMCO
BELL ACCORDING TO UNIVERSAL
REGULATIONS
Source : http://www.demcoalarm.com/products.html

6.4.1.2.2 Fire Control Room
The main control panel is located at the control room at the ground floor. The control panel indicates the
source of the fire alarm so that in case of an emergency, the source of the fire outbreak or the cause of
the alarm triggered can be set. If there is anything that is broken or an alarm is triggered, the nearest
guard on duty will be alerted to check the situation and report back. Should anything need to be reset if
it is a false alarm or once the fire is put off, it can be done through the main control panel.
FIGURE 6.4.1g MAIN FIRE
CONTROL PANEL UNIT
FIGURE 6.4.1i MAIN FIRE CONTROL PANEL LOCATION
FIGURE 6.4.1h INDICATION PANEL
UBBL- SECTION 237
Every large premises or building exceeding 30.5 meters in height shall be provided with a command
and control central located on the designated floor and shall contain a panel to monitor the public
address, fire brigade communication, sprinkler, water flow detectors, fire detection and alarm
systems and a direct telephone connection to the appropriate fire station by-passing the switch
board.

When there is an emergency or a false outbreak, the indication panel in figure and a light will show the
level that the outbreak is from and the computer will show the exact location of the source. The printer
will then print the report immediately. The system can be reset by the control panel that is located at the
left side.
FIGURE 6.4.1i DRAWING OF LAYOUT FIRE ALARM CONSOLE
FIGURE 6.4.1j
COMPUTER
TO MONITOR
THE SYSTEM
FIGURE 6.4.1k PANEL TO CONTROL THE
SYSTEM
FIGURE 6.4.1l PRINTER THAT PRINTS THE
REPORT OF ANY OUTBREAK
AUTOMATICALLY
UBBL- SECTION 155: Fire mode of operation
The fire mode of operation shall be initiated by a signal from the fire alarm panel which may be
activated automatically by one of the alarm devices in the building or manually.

6.4.1.2.2 Voice Communication
The fireman intercom system provides a reliable two-way emergency voice communication system
between the Master Console handset at the fire control room and the remote handset stations which is
located at the escape routes of the building. The master control panel comprise of the master handset, a
system control module and zone control modules. During a fire outbreak, a call lamp will flash with audible
signals at the master control panel to indicate where the call is coming from. As the handset is lifted to
answer the call, the audible signal will be silenced. The master control panel is also equipped with a fault
indicator unit which provide easier identification should there be a false alarm. The master control console
is located at the fire control room. When the master console handset is lifted and there is no incoming
call, there will be an outgoing call straight to the BOMBA. Should the BOMBA need to contact anyone in
the mall, the call will be transferred immediately to the phone at the fire control room.
6.4.1.2.2 Fire Switch
Should there be a fire, when the fire fighter arrives, only
they will be able to operate and off the fire switch. These
fire switch are located in each level and controls the
electrical appliances of each of the level. This is so that
there will be no explosion during the spread of the fire that
can cause more damage to the building. The fire switches
are located at the fire escape stairs. The switch can also
be used to run the under voltage relaose or stunt trip in the
main incoming breaker. If there is a fire in the building, the
fireman uses an insulateed rod to pull the handle which
isolates the utility supply to the building (ABB,2012).
FIGURE 6.4.1m FIREMAN INTERCOM
AT ESCAPE ROUTES
FIGURE 6.4.1o FIRE
SWITCH
FIGURE 6.4.1n MASTER CONSOLE
AT FIRE CONTROL ROOM

6.4.1.2.2 Manual Pull Switch
Incase of an emergencies, there are manual pull
switch that are located at the exit of the mall through
the fire escape routes. As people exit due to a fire,
there are able to pull this switch to warn the other
occupants of the building. The pull switch is linked to
the alarm system and functions just like the glass box.
It will trigger the alarm to ring when it is switched on.
Also, it will send an indication to the main fire control
panel to signal where the warning is from.
6.4.1.3 System Operation
In an event of a fire and the glass box is broken and the manual switch is pulled and the alarm at the
control room will sound for 30 minutes before the whole alarm system in the mall is activated. When this
happens, an indication on the main fire panel with show where the source of the alarm is coming from
and the BOMBA will be alerted. The person in charge will verify the fire and if there is a fire, the alarm
system in the mall will be activated to evacuate the building. The BOMBA will come to the building if they
have not been updated about the situation after 30 minutes. This shows that the system is a two stage
system
If it was a false alarm, the system is reset by the person in charge and the situation is reported to BOMBA.
After everything, the system is reset.
FIGURE 6.4.1p MANUAL PULL SWITCH

6.4.2 SPINKLER SYSTEM
6.4.2.1 Overview
The basement (car park area) of Jaya Mall is provided with an automatic sprinkler system except for the
electrical rooms such as TNB switch room, genset room and electrical riser room. This system consists
of an integrated network of pipes connecting water supplies to sprinkler nozzle installed at specific areas
in the building. The network of piping has valves that controls the sprinkles piping and includes a device
for actuating an alarm when the system is in operation.
6.4.2.2 Components
6.4.2.2.1 Sprinkler
Inside the mall, the sprinkler heads are recessed
inside the ceiling. This is for asthetic values so that the
ceiling will look clean. When there is a fire outbreak,
the cover wil be lowered and the sprinklers will drop
slightly to spray water out of the pipe. In the basement
where asethetic values are not so important, the
sprinkler hear is not hidden.
FIGURE 6.4.2a INDOOR SPRINKLERS FIGURE 6.4.2b BASEMENT SPRINKLERS
FIGURE 6.4.2c LOCATION OF MAIN SPRINKLER PIPES
UBBL- SECTION 25 (2)
All sprinkler system shall be electricity
connected to the nearest fire station to
provide immediate and automatic relay of
the alarm when activated

It is a requirement to install a sprinkler system when the building exceeds 700m3 of volume. It is a small
device that shoots water downwards by a deflector plate that directs the water in a circular patter over
the fire. Each sprinkler has an open compartment that holds a friable heat-sensing quartz build,
containing a coloured liquid that is usually red, that seals the water inlet.
The sprinklers at Jaya Mall are coated with corrosion resistant coatings to extend the life of copper alloy
sprinklers beyond that which would otherwise be obtained when exposed to corrosive atmosphere.
6.4.2.2.2 Butterfly Valve
The butterfly valves is to control the flow of water
of the sprinklers. Should the flow of the water of
the sprinklers need to be cut, the butterfly valves
are used.
FIGURE 6.4.2f LOCATION OF BUTTERFLY VALVE
UBBL- SECTION 25 (2)
Sprinkler Valves shall be located in a safe
and enclosed position on the exterior wall
and shall be readily accessible to the Fire
Authority
FIGURE 6.4.2d SPRINKLER PARTS
FIGURE 6.4.2e BUTTERFLY VALVE

Valmatic Rubber Lined Butterfly Valve is used at Jaya Mall. This butterfly valve is designed for perfect
shut off in both directions. This valve featured with one piece through shaft ensures dependable and
positive disk control. The body is protected with fusion bonded epoxy coating and is not in contact with
line media, hence corrosion free. The valve seat is stretch resistant and can be easily field replaced
without the requirement of any special tools.
6.4.2.2.2 Pumps
FIGURE 6.4.2h DUTY AND STANDBY PUMP FOR
SPINKLERS
FIGURE 6.4.2i SPRINKLER PUMPSETS
FIGURE 6.4.2j FIRE PUMP ROOM
UBBL- SECTION 247:
Main water storage tanks within the building,
other than for the hose reel system, shall be
located at ground, first or second basement
levels, with fire brigade pumping inlet connection
accessible to fire appliances.
FIGURE 6.4.2g BUTTERFLY VALVE PARTS

Pumps are required in order to provide adequate supply of water to the sprinkler riser at all times. All the
pumps are connected in parallel, with their suctions permanently filled with water when the tank it filled.
There are three main pups which is the Jockey Pump, Duty Pump and Standby Pump.
Jockey Pump: Jockey pumps are also known as pressure maintenance pump as it maintains the pressure
in the sprinkler piping system. It also assist in the prevention of drainage when a fire breaks out and water
starts to rush into the pipe. The jockey pump will fill in the pressure in the sprinkler pipes should the
pressure decrease at any time so that if there is an emergency, there will always be enough pressure to
pump the water out of the nozzles.
Duty Pump: The duty will start to function when the pressure drops to 60psi and provide enough pressure
of water so that the system can be activated in order. The duty pump runs with an electrical motor pump
to channel water to the sprinkler system.
Standby Pump: The standby pump will be automatically activated when the duty pump fails to operate
when the pressure drops to 60psi. The standby pump has the exact function as the duty pump. It replaces
the duty pump when the duty pump is not functioning. The standby pump runs on diesel.
FIGURE 6.4.2l LOCATION OF FIRE PUMP ROOM AT
BASEMENT 1
FIGURE 6.4.2m VALVES THAT CONTROL THE WATER FLOW AT THE VARIOUS ZONES AS SHOWN
IN THE SCHEMATIC DRAWING

6.4.2.2.3 Water Tank
The source of water of the tank comes from the main pipe from SYABAS and is stored into the water tank
as showed in figure 6.4.2p. The water is channelled into the tank at the fire pump room through the green
pipes. The water level indication is to show the level of water in the tank stored to ensure that there is
always sufficient water in case of an emergency.
The water storage for the sprinkler system, hose reel system and the wet riser system is all located in the
fire pump room. The same water tank is used to provide water for all these systems.
FIGURE 6.4.2n MAIN PIPE SOURCE FIGURE 6.4.2o GREEN PIPE THAT CHANNELS WATER
FROM MAIN SOURE TO THE WATER TANK
FIGURE 6.4.2q WATER
LEVEL INDICATION
UBBL- SECTION 247:
1. Water storage capacity and water flow rate for the firefighting system and installation shall
be provided in accordance with the scale as set out in the tenth schedule to these by-laws.
2. Storage tank for automatic sprinkler installation where full capacity if provided without the
need for replenishment shall be exempted from the restrictions in their locations.
FIGURE 6.4.2p WATER TANK

The sprinkler system is designed to operate automatically in event of a fire. When a fire occurs, a silicone-
based liquid contained inside the glass bulb of the nearest sprinkler nozzle absorbs heat rising from the
fire. This causes an air bubble inside the glass bulb to expand.
When the temperature surrounding the sprinkle rises above the rated temperature of the sprinkler nozzle,
the glass bulb breaks and ruptures the seal between the sprinkler head orifice and the network pipe. This
allows water from the sprinkler system to discharge through the sprinkler nozzle in a pre-determined
pattern.
Each sprinkler nozzle is designed to operate independently, so in an event of a fire, only the sprinkler
nozzles that have detected a high temperature will be activated. The flow switch installed for the system
will then detect the flow of water through the sprinkler network pipe when the sprinkler nozzle is activated.
This detection will be send a signal to the fire alarm panel that will send a visual and audible signal to the
fire affected area and to the fire brigade.
As water flows in through the network pipe when the sprinkler nozzle is activated, the pressure in the
pipe will decrease. When the pressure drops to a pre-determined setting in the pressure switch, the
Sprinkler Pump sets will operate.
When the Sprinkler Pump sets are activated, standby and duty pumps must be switched off manually in
the pump room.
1. Once the fire has been put off completely, the fire officer in charge has to carry out the following
procedures
2. The isolator valve on the relevant sprinkler rig has to be closed.
3. The main fire pump in the pump room must be manually stopped.
4. The sprinkler head must be replaced.
5. The isolation valve on the sprinkler rig has to be opened.
Once the isolation valve on the sprinkler rig is re-opened after a fire, the re-opened system standing
pressure will fall as the local pipework is filled up. The jockey pump will automatically cut in and boost the
pressure until the required system standing pressure is reached.

6.4.3 HOSE REEL SYSTEM
6.4.3.1 Overview
Jaya building is protected by a hose reel system running throughout the building and serve by the hose
reel pump set at fire pump room at basement 1 next to the pump set. The system consists of a series of
pipes pressurized system. The operation of the pump sets is controlled by pressure switches that are
pre-set to start the pump automatically when the pre-determined pressure subject to the adjustment as
follows :-
Pump set Cut-In Pressure (Psi) Cut-Out (Psi)
Duty Pump 150 Psi 160 Psi
Standby Pump 135 Psi 160 Psi
Great care has to be taken when the hose reel pump set are switch to “Auto” to ensure immediate
checking and attention when the hose reel pump starts automatically.
6.4.3.2 Components
6.4.3.2.1 Hose Reel Drum
The hose reel drum is of 25mm diameter swing type. Each reel is complete with 30m long 25mm diameter
bore non-kink braided rubber hose conforming to BS 3167. The maximum bursting pressure of the rubber
hose is 600psi while the working pressure is around 150psi.
At Jaya mall, SRI Fire Hose Reel is used. This hose reel are tested and approved to European Standard
EN671 by British Standards Institution and Australian Standards AS1221 by QAS Australia. These
approval require the certification authority to carry out regular inspections of the hose reel manufacturing
facility. With vigorous inspection and testing, SRI Fire Hose Reel is reliable and is at the highest standards
(SRI, n.d ).
The stop valve is of 25mm diameter conforming to BS1218. The indication of the open and shut position
is fixed on the wheel spindle of the valve and the direction of flow is marked on the body.
FIGURE 6.4.3a HOSE REEL DRUMS
STOP VALVE

6.4.3.2.1 Hose Reel Drum Pumps
Just like the sprinkler pumps, the hose reel pumps also have pumps. As water tank provides water to the
hose reel directing, standby pumps and duty pumps are needed to push the water to the upper floor. The
hose reel operates automatically when there is a drop of pressure or a flow of water is detected. Both the
pumps are prepared at all times. Should the duty pump fail, the stand by pump will start to operate.
FIGURE 6.4.3b LOCATION OF HOSE REEL DRUMS
UBBL- SECTION 244(c):
Hose reel shall be located at every 45 meters (depends on the building form).Besides, fire hose reel
should be located at the strategic places in buildings, especially nearer to firefighting access lobbies
in order to provide a reasonably accessible and controlled supply of water for fire extinguishing
FIGURE 6.4.3c PUMPS FOR HOSE
REEL
FIGURE 6.4.3d PUMP SET FOR
HOSE REEL

The hose reel system is installed, tested and commissioned to the specification of the local Fire Authority.
The hose reel system installed at the building consists of the following:-
Shut-Off Nozzle
The shut-off nozzle assembly is constructed from a corrosive resistant material conforming to BS 336
and the nozzle size is 0.25 internal smooth surface finishes. Spray pattern can be adjusted.
The horse reel system is easily to operate by one person and requires minimal operator instruction.
1. Proceed to the nearest hose reel in an event of a fire.
2. Turn open the 25mm nozzle that is located at the hose reel compartment.
3. Swing the hose reel out and extend it to the area of the fire.
4. Direct the nozzle to the fire and turn the adjustable nozzle.
5. Ensure the hose reel pump is turn on.
After the fire has been extinguished:-
1. Turn the adjustable nozzle to shut the water.
2. Wind the hose reel back to the drum without damaging it.
3. Swing the drum back to its original position
4. Turn off the 25mm valve to shut the system completely.
FIGURE 6.4.3f HOSE REEL SYSTEM
Source: http://dynoklang.com.my/site/data/images/item/img_49_Hose%20Reel%20System.JPG

6.4.4 WET RISER SYSTEM
6.4.4.1 Overview
At Jaya Mall, one set of wet riser system completed with all firefighting accessories inside is provided for
all the levels in the building including the basement. The system consist of a network of pipes connecting
water supplies to the landing of the valves. In case of a fire, hoses are connected to this valve and are
used to direct water to the fire. All block shares a same water supply RC tank at Basement Fire Pump
Room.
The pump starter and the control panel for the wet riser is located respectively in the fire pump room next
to the pump set. An electrical motor runs this wet rise pump set with a permanent power supply, backed
up with emergency power generator in case of a failure of main power supply from TNB.
Only fire brigade or trained personnel are permitted to use the system as it is high pressured and it
involves the use of water at high flow in large diameter hoses.
Wet Riser Tank
The tank is located at the fire pump room at basement 1. The compartment of the concrete water tank is
to make sure that at least half of the water capacity is available for use during routine maintenance.
Wet Riser Pump
Located at the fire pump room at basement 1, the wet riser pumps are all electrical motor driven. Each
set of pump consist of a duty pump, standby pump and a jockey pump. The duty pump will run during the
operation of the wet rise system. The standby pump will operate when the standby pump fails. The jockey
pump will operate when there is a drop in pressure by compensating the pressure to avoid having the
main pump in starting unnecessarily.
The pumps are all pre-set and controlled by a pressure switch. The pumps will be automatically started
when the pressure subject to the adjustment as follow:-
Pump sets Cut-In Pressure (Psi) Cut-Out Pressure (Psi)
Jockey Pump 190 Psi 230 Psi
Duty Pump 140 Psi 230 Psi
Standby Pump 125 Psi 230 Psi

Building Service Project 2 Case Study Report

Building Service Project 2 Case Study Report

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Building Service Project 2 Case Study Report