This document provides technical specifications for an HVAC system for a new library building. It will include floor mounted package AC units with a total capacity of around 90 tons. The units will be connected to ductwork supplying conditioned air to diffusers throughout the building. Sound attenuation measures and vibration isolation are specified to maintain low noise levels. Performance and installation standards are defined.

1. TECHNICAL SPECIFICATIONS
INTRODUCTION
This specification covers the minimum requirements for the engineering, procurement,
installation and commissioning of the HVAC system to be provided inside the new LIBRARY
building at IACS.
1.0 STANDARD SPECIFICATION
1.1 Scope of Work
The complete scope of work shall cover supply, erection, testing and commissioning of
the entire HVAC system as detailed under specification.
1.2 Basis of Design
The entire system has been based and designed on climatological data available as given
under Basis of Design and Scheme.
1.3 Terms and Definitions
The followings terms have been used in the tender specifications, drawings etc.
ISI : Bureau of Indian Standards.
ASHRAE : American Society of Heating Refrigeration & Air-conditioning
Engineers, USA.
B.S. : British Standards.
CMH : Cubic Meter per Hour.
RPM : Revolutions per Minute.
BTU/Hr. : British Thermal Unit per Hour.
Kcal/Hr. : Kilo Calories per Hour.
HZ : Hertz.
H.P. : Horse Power
SAG : Supply Air Grills.
SAD : Supply Air Diffuser.
SAF : Supply Air Filters.
FD : Fire Damper.
VCD : Volume Control Damper.
RAD : Return Air Damper.
FAD : Fresh Air Damper.
RH : Relative Humidity.
DB : Dry Bulb Temperature.
WB : Wet Bulb Temperature.
DP : Drain Point.
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2. 1.4 The codes, regulation as detailed below shall be followed in this contract :-
1. Safety code for air-conditioning (revised)
amendment 1
: IS 659 : 1964 (reaffirmed 1991)
2. Safety code for mechanical Refrigeration : IS 660 : 1963 (reaffirmed 1991)
3. Testing of refrigeration compressors : IS 5111 : 1993
4. Aircooled heat exchangers (amendment 1) : IS 10470 : 1983 (reaffirmed
1991)
5. Packaged Air-conditioner(amendment 1991) : IS 8148 : 1976 (reaffirmed
1991)
6. Thermostats for use in refrigeration etc. : IS 11338 : 1965 (reaffirmed
1991)
7. Metal Duct Work : IS 655 : 1963 (reaffirmed 1991)
8. Steel for general structural purpose : IS 2062 : 1992
9. Refrigeration : As per ASHRAE / ISI
Airconditioning & Refrigeration
Air-conditioning institute
Standards.
10. Hot Dip Zinc Coated Steel Tubes : IS 4736 : 1968
11. Colour code for the identification of pipe lines : IS 2379 : 1963
12. Specific requirements for the direct switching of
the individual motors.
: IS 4064 ( Part II) 1978
13. PVC insulated ( HD) Electric Cables for
working voltage up including 1100 Volts.
: IS : 1554 ( Part I)
14. HRC Cartridge fuse links upto 650 Volts. : IS 2208 : 1976
15. Starter : IS 8554 ( Part I) 1979
16. Inspection and testing of installation : IS 732 ( Part III) 1979
17. Galvanized steel wire for fencing : IS 277 : 1977
18. Three phase induction motors : IS : 325
19. PVC insulated ( heavy duty ) cables for
working voltage up to 1.1. KV and up to 11 KV
Grade respectively.
: IS 1554 : 1981 Part I & II
20. Code for practice for electrical wiring
installations.
: IS 732 : 1989
21. Code for practice for earthing : IS 3043
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3. 22. Specification for single phase small A/C &
universal motors
: IS : 996
23. Circuit breaker A.C : IS 2516 : 1980 Part I & II
24. Contactors for A.C for voltage upto 1100 V. : IS 2959 : 1975
25. Low voltage switch gear and control gear
assemblies.
: IS 8623 : 1993 Part I & II
26. Code of practice for selection of starters for AC
induction motors
: IS 3914
27. Specification for cables glands : IS 4821
28. Code for selection, installation & maintenance
of switch gear and control gear.
: IS 10118 :1982 Part I to IV
29. Conduits for electrical installations : IS 9537 : 1981 Part I to IV
30. Permissible limits of noise level for rotating
electrical machines.
: IS 12065 : 1987
31. Code of practice for installation and
maintenance of motors
: IS 3106 : 1966
32. HRC catridge fuse links upto 650 volts : IS : 2208
33. PVC insulated ( heavy duty) electric cables for
working voltage upto & including 1100 watts.
: IS ; 1554 ( Part I)
34. Method for testing Panel type air filters for AC
purposes.
: IS 7613 : 1975 (reaffirmed1991)
35. Unbounded glass wool for thermal insulation
(1st. Revision)
: IS 3690 : 1974
36. Expanded polystrene for thermal insulation
purposes. ( 1st. revision)
: IS 4671 ; 1984 (reaffirmed)
1.5 Safety Codes
The following IS codes shall be followed:
Safety code for mechanical refrigeration : IS 660
Safety code for air conditioning : IS 659
Safety code for scaffolds & ladders : IS 3696
Code of practice for fire precaution in Welding &
cutting operations
: IS 3016
Code for safety procedures and practices
In electrical works
: IS 5216
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4. Code of practice for safety and health Requirements in
electrical & gas welding And cutting operations.
: IS 3696
1.6 Spacs
All shop drawings shall be prepared by the A.C Contractor after examining the
architectural & AC drawings.
2.0 DESIGN CONDITIONS
The design parameters to be used for detailed design of the air conditioning system as
follows:
2.1 Outside Ambient Conditions
Summer : DB: 40o
C (105o
F) & WB: 28.33o
C (83o
F).
Monsoon: DB: 32.2o
C (90o
F) & WB: 30o
C (86o
F).
Equipment performs to the above ambient conditions and not fail in conditions of 43o
C
DB (dry bulb).
2.2 Inside Design Condition:
Room Temperature : 23o
C + 1.1o
C
Relative Humidity : 55% + 5%
Detail Input conditions are mentioned below:
Sl.
No.
A.C
space
Area (Sft) Occu-
pancy
Lighting
(W/sft)
Equip-
ment
(KW)
Fresh
Air
(cfm)
Sensi-
ble
Load
(BTU/
hr)
Total
load
(BTU/
hr)
ADP
(oF)
Dehmfd
Air (cfm)
Rem
arks
1 2 3 4 5 6 7 8 9 10 11 12
First
floor
Library 12877.00 150.00 1.50 5.00 2250 560,131 602,985 54 21,884
3.0 DESIGN PARAMETES
3.1 Ducting work
a) Method of Duct Design Equal friction method :
b) Maximum air velocity in supply duct FPM : 1200.0
c) Maximum air velocity in return duct FPM : 800.0
d) Friction loss in duct (maxm) MM Wg in 100 Mt run : 6.66
e) Maximum Velocity at supply air grill outlet FPM : 150.0
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5. 3.2 Insulation
Maximum temperature rise in the supply air duct from Air-handlers outlet to farthest
outlet in ºC 1.10
4.0 NOISE AND VIBRATION CONTROLS
4.1 The air conditioning contractor must take all necessary precautions to have minimum
noise generation and its transmission. Minimum vibration as permitted by IS relevant
code shall be ensured. A few points for guidance only are given below:
a) Double fire retardant flexible connections shall be provided from air discharge to
outlet of air-handler to the duct.
b) Vibration isolation pads of suitable thickness commensurate to loading for isolation
of vibration shall be provided under all equipments. in consultation with
manufacturer for proper selection of vibration isolators
c) Flexible conduit connections of minimum diameter of 50mm to motors shall be
provided. All loops should be large enough to allow connections to remain flexible.
d) All conduit connection where conduits are 60mm or larger shall be made of 1.2
meters minimum length conduit installed in the shape of U and grossly slack to
provide maximum vibration isolation.
e) The floor supported piping shall be mounted on pipe supports with 7.5mm ribbed
neoprene pads between the base plate of the pipes and the floors.
f) All items suspended from false ceiling shall be isolated on separate hangers.
g) In case of ducts, conduits, pipes & tubes the annular space between construction
and penetrating element shall be sealed with sand cement plaster.
h) The supply duct starting from air handling unit & plenum shall be provided with 12
mm thick acoustic lining as indicated in the tender drawings.
i) The air-conditioning contractor shall take all other precautions or shall make his
own arrangements even if not specified in the tender documents for eliminating
high noise levels & shall minimize vibrations in all mechanical equipments without
any additional cost.
5.0 GENERAL DESCRIPTION AND SPECIFICATION OF THE SYSTEM PROPOSED
The air-conditioning of the IACS Kolkata shall be based on the air cooled Floor Mounted
Type package unit for 1st Floor area.
The 1st Floor area shall be air-conditioned by the Air Cooled Floor Mounted type
packaged air conditioning unit. The Installed capacity of the A. C. Unit shall be 90 TR
(approximately) (4 Nos 15 TR Air Cooled Scroll Package Unit as working + 2 Nos 15 TR
unit as standby)
The Condenser for the package unit shall be located outside the building and on a MS
structure. The Supply air main ducting from the package Units shall be run above the
false ceiling to the conditioned space as per layout enclosed with tender. The
Conditioned air shall be distributed through the ceiling mounted type diffuser/ Grill as per
distribution arrangement indicated in the drawings.
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6. The return air shall be mixed with fresh air before passage over the cooling coils.
The fresh air intake shall be complete with Air Intake Louvers with insect screen, &
Manual & Motorized Volume Control damper. The Motorized VCD will be controlled
through a CO2 Sensor and a controller. Vendor has to select the controller in such a way
that, set point of CO2 level and actual CO2 quantum can be seen on the controller and
the controller can give necessary 0-10mA output to the Motorized damper in such a way
that based on the actual level of CO2 the fresh air damper will open / Close. The
Controller should be such that, the minimum & Maximum value of the operating range
can be adjusted in the controller.
The Ductwork shall have provision for Volume control dampers for balancing the system.
The entire supply air duct shall be insulated with the CLASS O ANTIMICROBIAL type 13
mm thick Nitrile rubber with Al. Foil Faced. All the Terminal Diffuser / Grill also with Al.
Volume Control damper to have proper air distribution inside Conditioned area and for
balancing purpose. To control the Noise level inside area as per noise level mentioned
above, acoustic lining shall be provided inside the Duct up to three meters (3M) from the
indoor unit mouth as mentioned in the drawing. Necessary Motorized Type Fire damper
with spring return type actuator for supply air duct and Fusible link type fire damper as
per UL555 shall be provided for Return air path for fire protection. Necessary electrical
interlocking arrangement shall be provided with fire damper & Evaporator fan motor to
shut down the AC fan on detection of fire.
5.1 Air cooled Package A. C. System
Evaporator Section (Indoor unit):
The evaporator fan should be with DIDW type centrifugal fan of AMCA certified having
with the minimum followings:
• C45 carbon steel shaft
• Anti corrosion paint on shaft for durability
• Self-aligning and hermetically sealed durable ball bearings
• Tab-lock blades
• Statically and dynamically balanced to grade G4 (according to ISO 1940)
The capacity of the each Evaporator fan for 16.5TR unit should be 6800 CFM. The
Static pressure for the fan should be 35mm WG. The fan motor should have belt driven
type with variable pitch pulley to adjust the CFM during commissioning & maintenance.
The evaporator section should have with 4R deep cooling coil and with 50mm thick
Synthetic washable type pre filter with 90% efficiency down to 10 micron.
The Filter & Coil face velocity should not be more than 500 FPM. Each unit should have
multiple scroll compressors. The unit should also with either Thermostatic or Electronic
expansion valve. The drain pan of the indoor unit should be insulated with proper
sandwich insulation to protect condensation. Oppose blade type Volume control damper
to be provided outside the mouth of unit with ON / OFF marking for proper controlling &
adjustment of Air quantity as per design condition.
Following Protections should be considered for Each Package unit:
1. Single Phase & Phase reversal protection
2. High Pressure Cut out
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7. 3. Low pressure cut out.
4. Over Voltage & Under Voltage Protection.
5. Over load trip .
The Microprocessor Controller should have the following features:
1. In the power saving mode, when the compressor is off, the condenser fan should
also remain off.
2. Room temperature set point and the actual room temp. to be displayed though
Electronic temperature sensor.
3. Programmable operation feature for one year with real time clock.
4. Auto restart after restoration of power.
5. Fault Diagnosis feature.
6. Anti recycle feature.
Condenser
The Air Cooled Condenser should be with aerofoil type low power consumption fan, heat
exchanger to be coated with golden anticorrosive on aluminum Fins surface. The
Cooling coil to be design in such a way that the package unit can work upto 45o
C.
Refrigerant Pipe:
The indoor & outdoor unit to be connected with the hard drawn copper pipe of minimum
18G thickness. All the elbow & reducer should be with the same thickness of the pipe.
The size of the refrigerant pipes to be done by the vendor based of actual pipe length
etc. The Refrigerant pipes should be Pressure tested at 400 PSI / 200 PSI and shall hold
the pressure for 24 hrs. Proper Vacuuming should be done before charging of the
refrigerant.
Pipe Supports
All refrigerant piping shall be supported to prevent deflection, bulking and vibration.
Piping shall be supported at all changes in direction and at intervals of not more than 1.2
meters on straight runs. Pipe supports and clamps shall be subject to approval of
consultant. Pipe work on roofs and floors shall be supported on off-set clamps, floor. The
Pipe support stands shall be bolted to the concrete slab or steel members. Vertical pipe
work shall be supported with trapeze hangers with rods suspended from inserts.
Condensate drain pipe supports shall be capable of vertical adjustment after installation
of piping. All pipe works passing through the walls, floors and roof slabs shall be
provided with pipe sleeves of adequate size to allow the passage of insulation.
Electrical Cabling
All the connected Power cable should be with Al. Ar. Cable of 1100 V grade & control
cable should be with Cu. Ar. Cable of 1100 V grade. The minimum size of Power cable
should be 4 sqmm Aluminium & for control cable 2.5 sqmm copper. The incoming supply
of the MCC should be with MCCB & all outgoing feeder should be with MCB & for
compressor MCCB of suitable rating. The Outdoor Structure should be such that proper
maintenance is possible and isolators to be provided near condensers with necessary
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8. interlock with package unit, so that for maintenance / emergency condensers can switch
off.
Noise Levels
Noise level inside the conditioned area resulting from the units shall not exceed the
following:
- NC 35 for office area
All running equipments shall be isolated from the building structure and the support
isolated from other items of equipment.
All the units shall have anti-vibration mountings of approved make and these shall be
subject to approval of the consultant.
All the Air distribution system should be designed in such a way so that inside noise level
should be within NC 35.
Vibration Isolators
All plant shall be isolated from the building structure and the support isolated from other
items of equipment.
The package units’ shall have anti-vibration mountings of approved make subject to
consultants approval.
Multi-layer rubber pads with square grid convolutions on both sides, spaced with steel
shims and of a thickness to suit the points of uniform loading of the plant item but of a
minimum thickness of 32 mm shall be spaced not more than 750 to 1000 mm apart.
6.0 DUCTWORK
STANDARD SPECIFICATION FOR AIR CIRCULATION SYSTEM
This section deals with supply, erection, testing & balancing of GI sheet metal duct work
and air registers conforming to specifications as given below:
Material for Ducing
The duct shall be fabricated out of galvanised sheet, class VIII (Zinc coating 120
gm/m²ƒnas per the parameters given below which are conforming to IS 655-1963.
Maximum Thickness Type of Transverse Bracing
Upto 600 0.63 S-drive, pocket or bar,
slips, on 2.5 m ceners
None
601 to 750 0.63 S-drive, pocket or bar,
slips, on 2.5 m Centers,
S-drive 25 mm pocket, or
25 mm bar slips on 2.5 m
centers.
25 x 25 x 3 mm, angles,
1.2 m from joint.
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9. 751 to 1000 0.80 Drive, 25 mm pocket or
25 mm bar slips, on 2.5 m
centers 40 x 40 mm
angles connections.
25 x 25 x 3 mm angles, 1.2
m from joint.
1001 to 1500 0.80 40 mm bar slips, with 35 x
3 mm bar reinforcing on
2.5 m centers
40 x 40 x 3 mm angles, 1.2
m from joints.
1501 to 2250 40 x 40 mm angle
connections, or 40 mm
bar slips, 1 m maximum
centers with 35 x 3 mm
bar reinforcing.
40 x 40 3 mm diagonal
angles, or 40 x 40 x 3 mm
angle 60 cm from joint.
* Ducts 2250 mm and larger require special field study for hanging and supporting
methods.
In addition to above the following points should be also taken into account while
fabrication of ducts.
a) All ducts of size larger than 450mm shall be cross broken.
b) All ducts shall be supported from the ceiling / slab by means of MS rods of dia 9mm
with MS angle of size 40 x 40 x 5 mm at the bottom with neoprene pad in between
the duct & MS angle. The ducts shall be suspended from the ceiling with the help of
dash fasteners. Provision for necessary ancillary materials required for hanging the
ducts shall be arranged by the contractor.
c) The vanes shall be provided wherever required and shall be securely fastened to
prevent noise & vibration.
d) The rubber gasket shall be installed between duct flanges in all connections and
joints.
e) All flanges and supports should be primer coated.
f) The flexible joints shall be fitted to the delivery side of AHU fans with Fire Retardant
Double canvass. The length of flexible joints should not be less than 150 mm and
not more than 300 mm between face.
g) The ducting work can be modified if deemed necessary in consultation with the
Engineer in Charge to suit actual site conditions in the building.
h) Box Type Dampers & Splitters
These dampers shall be provided in the ducting work for proper control and
balancing of air distribution. All dampers shall be louver type robust construction.
These dampers shall be fitted with easily accessible operating mechanism,
complete with links, levers, quadrant for proper control and setting in a desired
position. The position of the handle of the damper operating mechanism shall be
clearly visible and shall indicate the position of the damper in the duct. All dampers,
splitters shall be fabricated out of G.S. sheet of two gauges higher than the duct
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10. piece having these fittings. Dampers shall be installed in duct at all required
locations. No extra payment shall be made separately since these form part of
Air Circulation System.
NOTE: In case angle iron supports are not feasible to be installed for supporting the
ducts due to height constraint then the contractor shall support the ducts with M.S
flats of at least double the thickness of the angle iron supports.
A) THE SUPPLY AND RETURN AIR GRILLS AND CEILING DIFFUSERS
The supply and return air grills and ceiling diffusers shall be made of powder coated
extruded aluminum sections. The supply air grills / diffusers shall be provided with screw
operated opposed blade volume control device made of extruded aluminum in black
anodized finish. All grills / diffusers shall have soft continuous rubber / foam gasket
between the periphery of the grills / diffusers and surface on which it has to be mounted.
The colour of grills / diffuser shall be as per the approval of the Engineer in Charge.
B) LINEAR SUPPLY AND RETURN GRILLS
The linear continuous supply / return air grills shall be made of powder coated extruded
aluminum construction with fixed horizontal bars. The thickness of fixed bar louvers shall
be 5mm in front and the flange shall be 20mm wide with round edges. The register shall
be suitable for concealed fixing and horizontal bars of the grills shall mechanically crimp
from the back to hold them.
The colour of grills shall be as per the approval of the Engineer in Charge. The volume
control device made of extruded aluminum construction in black anodized finish shall be
provided in supply air duct collars only.
C) SQUARE / RECTANGULAR CEILING DIFFUSERS
The square / rectangular ceiling diffusers shall be made of powder coated extruded
aluminum construction with flush fixed pattern. The diffusers shall have Anti-Smudge ring
and spring loaded removable central core in various pattern for air flow direction. The
diffusers shall be mounted by concealed screw fixing arrangement. The volume control
device of extruded aluminum construction in black anodized finish shall be provided in
supply air diffusers. The colour of diffuser shall be as per the approval of the Engineer in
Charge.
D) VOLUME CONTROL DEVICE
The opposed blade volume control device shall be made of Powder Coated extruded
aluminum construction in black anodized finish. Opposed blades shall be pivoted to
extruded aluminum frame with Nylon bushes. Specially designed blade shall have an
overlapping lip which shall ensure a tight closure.
E) FRESH AIR INTAKE LOUVERS WITH BIRD SCREEN
The fresh air intake louvers at least 50mm deep will be made of powder coated extruded
aluminum construction. Bird / insect screen will be provided with the intake louvers. The
blades shall be inclined at 45 degree on a 40mm blade pitch to minimize water ingress.
The lowest blade of the assembly shall be extended out slightly to facilitate disposal of
rain water without falling on door / wall on which it is mounted.
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11. The intake louvers shall be provided with factory fitted aluminum construction volume
control dampers in black anodized finish.
PAINTING
All ducts collar / shoot behind the grills / diffuser shall be given at least two coats oil black
enamel paints.
TESTING
The complete duct system shall be tested for air leakage & complete air distribution
system shall be balanced in accordance with air quantities indicated on the approved
drawing
STANDARD SPECIFICATION OF THERMAL / ACOUSTIC INSULATION
This section deals with supply and fixing of thermal / acoustic insulation of ducts, pipes
etc. as per the specification given in this section.
MATERIAL OF INSULATION
The insulation material of the following kind shall be used for cold insulation.
a) FOR DUCT INSULATION WITH CLASS O ANTI-MICROBIAL TYPE
13MM NITRIAL RUBBER HAVING FOLLOWING SPECIFICATION:
- Insulation material shall be Closed Cell Elastomeric Nitrile Rubber
- Density of Material shall be between 40 to 60 Kg/m3
- Thermal conductivity of elastomeric Nitrile rubber shall not exceed 0.033
W/mK at mean temperature of 0°C
- Insulation material shall have anti-microbial product, which is EPA
(Environmental Protection Agency), USA approved, as an integral part of
insulation that cannot be washed off or worn off.
- It shall give enhanced level of protection against harmful Microbes such as
bacteria, mold, mildew and fungi and should confirm to following
standards:
Fungi Resistance – ASTM G21 and Bacterial resistance –ASTM 2180 /
ASTM G 22.
- The insulation shall have fire performance such that it passes Class 1 as
per BS476 Part 7 for surface spread of flame as per BS 476 and also pass
Fire Propagation requirement as per BS476 Part 6 to meet the Class ‘O’
Fire category as per 1991 Building Regulations (England & Wales) and the
Building Standards (Scotland) Regulations 1990
- Material should be FM (Factory Mutual), USA approved.
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12. - Water vapour permeability shall not exceed 1.74 x 10-14 Kg / (m.s.Pa), i.e.
Moisture Diffusion Resistance Factor or ‘µ’ value should be minimum
10000.
- The Insulation materials should be with self adhesive type and with Al. Foil
Faced to protect against mechanical damage.
The Thermal conductivity values in W/m. K of fiberglass shall confirm to following:
Mean Temperature o
C Density in Kg/cmt Thermal Conductivity W/m.k
For Duct Lining
25 o
C 32 0.032
50 o
C 32 0.035
The sample of insulation material shall be submitted for approval to the Engineer in
Charge and the sample shall be tested for thermal conductivity values by the contractor at
his own expense. Adhesive used for setting the insulation shall be non-flammable, vapor
proof, CPRX compound.
INSULATION ON SHEET METAL DUCTING
The thickness of insulation used on ducting shall be as detailed below:
Conditioned space
a) Supply Air Duct Insulated with 13 mm thick Aluminium faced Close cell
Nitril Rubber
The application of insulation should be carried out in workman like manner as detailed
below
Insulation of Ducting with Aluminium FACSD Fibre Glass
a) Duct surface to be cleaned thoroughly
b) To apply two coats of adhesive Compound.
c) To fix factory pre-laminated aluminium faced self adhesive type close cell Nitril
rubber of specified thickness.
d) Fix self-adhesive aluminum tape of 50 mm width on all longitudinal / Transverse
joints.
e) Finally fix PVC straps of 19mm width at every 300mm centre to centre.
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13. 87
ACOUSTIC LINING OF DUCT
The material to be used for duct lining shall be 25mm thick resin bonded fiber glass
having a density of 32 Kg/m³ or 12 mm thick fibre glass rigid board of density 48 Kg/m³ &
covered with 0.5 mm thick perforated aluminum sheet. The lining of initial length of the
duct shall be done as shown in the tender layout drawings & shall be carried out as
follows.
a) Clean the duct piece thoroughly,
b) To apply two coats of CRPX compound.
c) Fix the fiber glass of suitable thickness & cover with fiber glass tissue paper.
d) Cover the insulation board with 0.5mm thick perforated aluminium sheet with at
least 20% to 25% perforations
e) Secure the aluminium sheet with GI frame work with cadmium coated self taping
screws with washers.
Special Notes:
1. All the party should submit the Equipment rating chart at different temperature /
outside condition.
2. Compressor ratting chart should be submitted along with tender for proper
technical evaluation of the capacity offered.
3. Vendor should submit the technical Data Sheet & Shop drawing within 7 days
from date of issue of order for necessary approval by consultant before physically
start the work at site.
4. After Commissioning vendor should conduct performance testing of the entire
system for 72 hrs.
5. Vendor should submit the complete operation & maintenance manual containing
As Built Drawing, Do’s & Don’t, Operation procedure, Set points of different
parameters, Catalogue & Technical details etc.