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202
SECTION VII
H.V.A.C SPECIFICATION
PACKAGED TYPE AIR-CONDITIONING UNITS – AIR COOLED
(DATA SHEET ATTACHED MUST BE FILLE...
203
Evaporator Coils:
The evaporator coils should be fabricated out of copper tubes and aluminium fins, with
circuitry des...
204
Control panel should have electrical switchgear and power /c control wiring required for
switching ON OFF evaporator a...
205
DATA TO BE FURNISHED WITH OFFER FOR PACKAGED A/C UNITS:
1. Make
2. Country of origin
3. Model
4. Capacity (at conditio...
206
28 Condenser fin spacing
29 Condenser fan cfm
30. No. of circuits
31. Type of capacity control for condenser, if provi...
207
k) Low refrigerant level
l) Motor overloads for compressor motors
m) Motor overloads for blower (evaporator) motors
n)...
208
WALL MOUNTED SPLIT A/C UNIT:
The units shall be used for cooling and dehumidifying air.
The units, with capacities as ...
209
Sufficient louvers should be provided for air movement over condenser & fan motor. The
unit should have access panels ...
210
DATA TO BE SUBMITTED WITH OFFER:
(ITEM: HI-WALL SPLIT A/C UNIT)
1. Make
2. Model
3. Nominal capacity of unit TR
4. Cap...
211
AIR DISTRIBUTION
Scope:
The scope of this section comprises of supply, fabrication, installation, testing and
commissi...
212
c. All exposed ducts up to 60 cm width within conditioned spaces shall have slip joints -
no flanged joints. The inter...
213
trapeze hangers formed of galvanized steel rods and galvanized steel angle/ channel
under ducts at no greater than 2 m...
214
Supply & return air registers shall be of either steel or aluminium sections as specified in
schedule of quantities. S...
215
b. Supply air diffusers shall be equipped with fixed air distribution grids, removable
key-smudge volume control dampe...
216
installation as per the Specifications. These accessories shall not be separately
measured nor paid for.
b. Special It...
217
position if disturbed at any time. Complete air balance report shall be submitted for
scrutiny and approval, and four ...
218
PIPING
Scope:
The scope of this section comprises the supply and laying of pipes, testing and balancing
of all drain w...
219
d. After the refrigerant piping installation has been completed, the refrigerant piping
system shall be pressure teste...
220
quoted assuming 2 running meters of suction pipe and 2 running meters of liquid pipe, if
B.O.Q. mentions quantity of 1...
221
INSULATION
Scope:
The scope of this section comprises the supply and application of insulation conforming
to these spe...
222
insulation. Metal clips and / or metallic straps should be used for this purpose wherever
necessary. The joints should...
223
Measurement of Insulation:
Measurement for duct and pipe insulation for the project shall be on the basis of center
li...
224
VENTILATION FANS
CAPACITY: AS PER SCHEDULE ENCLOSED.
Fans should be of make as per list of makes approved, of centrifu...
225
DATA TO BE SUBMITTED WITH OFFER :
VENTILATION FANS
1. Make
2. Model / Type
3. Casing :
a) M.O.C.
b) Treatment
c) Thick...
226
b) Noise level at 3 m
7. Base frame/ base plate included Yes / No
8. Foundation bolts included Yes / No
9. Anti-vibrat...
227
ELECTRICAL PANELS
Scope:
The scope of this section comprises of fabrication, supply, erection, testing and
commissioni...
228
symmetrical arrangement. Facility should be provided for termination of cables from both
above and below the control p...
229
Cable Compartments:
Cable compartment of adequate size should be provided in the control panels for all
incoming and o...
230
c. Moulded Case Circuit Breakers: Moulded Case circuit Breaker should be of motor
duty and should be suitable for cont...
231
voltmeter 0-500 volts with three way and off selector switch, CT operated ammeter of
suitable range with three nos. CT...
232
For all single phase/ 3 phase wiring, 415 volts grade PVC insulated copper conductor
wires should be used. The equipme...
233
400 HP Motors - do - 600 Amps - do -
600 HP Motors - do - 900 Amps - do -
Earthing:
Earthing should be provided as per...
234
Before commissioning of the equipment, the entire electrical installation should be tested
in accordance with relevant...
235
ELECTRICAL DISTRIBUTION PANEL FOR A/C PLANT (EXTENSION SIDE)
QTY.: 1 No.
INCOMER: Main Incomer Isolator - MCCB 630 Amp...
236
1.0 TECHNICAL DOCUMENTATION WITH OFFER:
In order to have a fair comparison among all quotes, and to ensure an installa...
237
• Related other Contractors.
• Agencies of various inter related services.
• Local, State & Central Govt. bodies.
6.0 ...
238
at their cost & resources. The client shall offer only open space and electricity at
one point in the premises. Electr...
239
11.0 SUB-CONTRACTORS:
Appointment of the Sub-Contractor, if any, shall be made after getting written
consent from the ...
240
the Contractor who shall there upon shall take such steps as are necessary, subject
to approval of Consultant, to expe...
241
15.0 CONTRACTOR’S MANPOWER:
The Contractor shall employ a full time Engineer on the Works who shall be
responsible for...
242
standard I.S.I. colour code shall be allowed. The ducts coming behind the R.A.
grills shall be painted with black pain...
243
No separate rate shall be allowed for fittings. For duct insulation, external area
shall be calculated on basis of the...
244
cost, for a period of 10 calendar years from the day of handing over. In the event
of extra savings in operating cost,...
245
G. S. Sheets Nippon / SAIL. / Jindal
EPS slabs Beardsell / Loyd / Modifoam
Closed cell elastomeric Nitrile Armacell
Cr...
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158742585 packaged-type-ac-units

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158742585 packaged-type-ac-units

  1. 1. 202 SECTION VII H.V.A.C SPECIFICATION PACKAGED TYPE AIR-CONDITIONING UNITS – AIR COOLED (DATA SHEET ATTACHED MUST BE FILLED & SUBMITTED WITH OFFER) The units, with capacities as per Bill of Quantities, should be factory assembled and tested prior to dispatch to site. Units should be packaged type with indoor unit housing evaporator coil, blower, filters, panel & compressors; and outdoor unit housing the condensers and fans. Mounting & Discharge: The indoor units should be enclosed in a cabinet fabricated out of pre-coated / pre- plasticized / polymer coated / powder coated sheet steel panels. The panels should be easily removable for inspection/ maintenance. The panels should be mounted on frame with proper gaskets (neoprene rubber / other grade on approval) to avoid dust accumulation, noise / vibrations & air leakages. Cabinet should also be lined with suitable acoustic lining to dampen the machine noise and reverberations. The complete package should be mounted on floor with anti-vibration mounting pads forming a part of scope without extra price. The units should be top / front at top discharge types. Filters: Filters should be manufactured from HDPE, of washable & easily removable type, with filtration size of 20 microns and efficiency more than 85%. During installation, the filters must be covered with plastic sheet to prevent clogging due to construction dust. During commissioning, the filters must be covered with fine cloth for same purpose, to be removed once the site is made free of dust. The plastic sheet and cloth shall be accounted for while quoting and any separate price shall not be paid for same. Compressors: Compressors should be of hermetically sealed Scroll type of reputed make. Each compressor should have isolation valves, crankcase heater during off cycle, oil top-up connection, gauge connections, (on compressor or built in valves), anti-vibration mounting pads / fixtures and own terminal box. Capacity of the condenser should be adequate for the unit quoted, and the compressor should be capable of operating at the conditions assumed for design for extended durations. Compressors selected must be available readily in India at a notice of 48 hours. Compressors must be mounted on suitable anti – vibration mounting pads within the cabinet of the unit, and proper provision must be made for compressor cooling as well as for accessibility of maintenance / removal of compressor. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  2. 2. 203 Evaporator Coils: The evaporator coils should be fabricated out of copper tubes and aluminium fins, with circuitry designed to maintain required Apparatus Dew Point (ADP) at varying load conditions. The coil circuitry should be designed for optimum performance as well as for maintaining a stable leaving air condition. Area of fins and tubes should be sufficient to achieve required heat transfer, and the data must be furnished in the data sheet attached, with offer. Coil must be provided with a drain pan manufactured out of 14 G Stainless Steel / other suitable material, duly insulated to avoid dripping of condensate outside the cabinet. Proper arrangement for even distribution of refrigerant throughout the coil area, proper oil return and for preventing liquid flood back to compressor must be made in the coil design. Evaporator Blower: Centrifugal forward / backward curved blower should be of reputed make and related information must be furnished in the data sheet with the offer Material of construction for blower can be Aluminium / G. I., based on manufacturer’s design. It should be capable of delivering required air flow at a static pressure arrived by adding the total pressure drop occurring within the indoor unit – in the evaporator coil, filters etc. – to the external static mentioned in the BOQ. It should be installed on sturdy mountings & should be dynamically balanced at operating speed. The blower motor should be capable of operating at 20% excess flow and should also be capable of operating round the clock with maximum flow (when filters are clean). Bearings and belts used in the blower assembly must be available locally and the data must be furnished in the datasheet attached. Condenser: Condenser section should be quoted with its own supports / stand / cowls if required assuming floor/wall mounting and separate rate for such structural materials or stands should not be quoted. Material of construction for tubes should be copper and that for fins should be aluminium. Fan motors with weatherproof outdoor grade terminal box should form a part of condenser. The motors should be capable of operating continuously in outdoor exposure, with enclosure conforming to IP 55. The area of tubes and fins must be designed suitably to achieve required heat discharge at design ambient and saturated condensing temperatures. Data regarding same must be furnished in the datasheet. The fins should be treated with anti – corrosive coating to withstand salty and humid weather, conforming to JIS – Z – 2371 or equivalent standard. Panel: TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  3. 3. 204 Control panel should have electrical switchgear and power /c control wiring required for switching ON OFF evaporator and condenser fans, compressor, and Screen / LCD displays for all motors ON, overload trips, fault trips with memory for minimum 5 faults, necessary interlockings and terminations. Drawing showing electrical power and control circuitry, laminated by transparent Plastic sheets must be stored / adhered firms inside the unit panel. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  4. 4. 205 DATA TO BE FURNISHED WITH OFFER FOR PACKAGED A/C UNITS: 1. Make 2. Country of origin 3. Model 4. Capacity (at conditions mentioned in BOQ) 5. Indoor unit : i) Material of Construction ii) Thickness iii) Surface treatment iv) Width (mm) v) Depth (mm) vi) Height (mm) vii) Maintenance space required – front viii) Maintenance space required – back ix) Maintenance space required – sides 6 No. of installations of same model in India 7. No. of installations of same model in World wide 8. No. of trained service personnel in India 9. No. of trained service personnel in Kerala 10. Origin of spares – country 11. Stock of spares – nearest place 12. No. of circuits in each unit 13. No. of compressors in each circuit 14. Type of compressor – Open/Semi-Hermetic/ Hermetically sealed 15. Type of compression – Reciprocating/ Scroll/ Screw 16. Make of compressor 17. Model of compressor 18. Nominal capacity of compressor (compressor capacity chart to be attached describing heat pumping capacity and power consumption at various Saturated Suction temperatures and Saturated condensing temperatures) 19. Nominal current drawn at 100% load 20. Maximum in rush current 21. Type of unloading 22. Capacity control steps 23. Condenser dimensions – i) width (mm) ii) depth (mm) iii) height (mm) 24. Condenser surface area (air side) 25. Condenser surface area (refrigerant side) 26 Condenser tube thickness 27 Condenser fin MOC TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  5. 5. 206 28 Condenser fin spacing 29 Condenser fan cfm 30. No. of circuits 31. Type of capacity control for condenser, if provided ( fan speed regulation ) 32. Enclosure for condenser fan motors 33. Type of evaporator 34. No. of circuits per evaporator 35. Type of capacity control 36. Make and model of blower 37. Evaporator blower quantity 38. Evaporator blower air flow (cfm) 39. Evaporator blower static – gross (mm WG) (fan curves to be enclosed) 40. Evaporator surface area (air side) 41. Evaporator surface area (water side) 42 Evaporator tube thickness 43 Evaporator Fin MOC 44 Evaporator fin spacing 45. Refrigerant – name 46. Refrigerant – charge 47. Oil – name 48. Oil – charge (Litres) 49. Type of air discharge (floor / top / side) 50. Size of air outlet 51. Size of air inlet 52. Type of filter 53. Filtration efficiency 54. Pressure drop across filter when choked 55 Type of panel Electrical/ Microprocessor/ PC Compatibility with BMS? 56 Does panel require an interface to be connected with a PC? 57. Remote operation possible? 58. Controls provided for protection against a) High voltage b) Low voltage c) Single phasing d) Phase reversal e) High/Low frequency f) Damage to panel components due to momentary surges/power cuts g) High discharge pressure h) Low suction pressure i) Low oil circuit pressure j) Low oil level TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  6. 6. 207 k) Low refrigerant level l) Motor overloads for compressor motors m) Motor overloads for blower (evaporator) motors n) Motor overloads for condenser fan o) Filter choking p) Scheduling possible? 59. Temperature control level +/- °C 60. Single line electrical power circuit diagram enclosed? 61. Control circuit diagram enclosed? 62. Description of control mechanisms enclosed? 63. List of fault displays enclosed? 64. Clear space required for supply air in front of condenser 65. Figures for cfm on evaporator & condenser side 66. Power consumption at operating conditions & 100% load 67. Compressor/s 68. Condenser fan/s 69. Noise level for indoor unit at 1 m. 70. Noise level for outdoor unit at 3 m. 71. Confirm inclusion of canvass connections, indoor & outdoor stands, anti – vibration pads, plastic and cloth covering for filters in the prices quoted – yes / no 72. Confirm attaching capacity & power consumption charts for compressor, fan curves – yes / no TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  7. 7. 208 WALL MOUNTED SPLIT A/C UNIT: The units shall be used for cooling and dehumidifying air. The units, with capacities as per Bill of Quantities, should be factory assembled and tested prior to dispatch to site. Units should be hi-wall type with indoor unit housing evaporator coil, blower, and outdoor unit housing the condensers and fans. Units should be carrying a BEE rating of minimum 3 stars. Indoor Unit: Indoor unit should be designed for mounting on a wall with the help of an in-built back mounting plate. It should comprise of plastic cabinet, evaporator coil & centrifugal fan with drive. Blower: The blower should be designed for rated flow at a low noise level (below 45 Db) at full speed. It should have settings for operating at three different speeds. Grill: A grill manufactured out of tough grade of plastic should cover the unit from lower side. It should be provided with swinging type supply air louvers and fixed type return air louvers. Central core should be removable with synthetic filters clipped on it. Remote Control: The unit should be fitted with a remote sensor having facility to receive signal from a wireless remote to control ON/OFF, thermostat setting, fan speed and swing operations. Outdoor Unit: Outdoor unit should comprise of hermetically sealed compressor of capacity matching with the evaporator. The compressor should be capable of continuous operation at an ambient DBT of 450 C. Condenser: Air cooled condenser having adequate heat rejection capacity and condenser fan with motor should be housed within a weather proof sheet metal cabinet, along with compressor. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  8. 8. 209 Sufficient louvers should be provided for air movement over condenser & fan motor. The unit should have access panels to facilitate clearing & maintenance of internal components. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  9. 9. 210 DATA TO BE SUBMITTED WITH OFFER: (ITEM: HI-WALL SPLIT A/C UNIT) 1. Make 2. Model 3. Nominal capacity of unit TR 4. Capacity @ 35°C Outdoor DBT & 24°C Indoor DBT with 55% R.H. TR 5. Power consumption at 35°C outside DBT, 24°C inside DBT & 55% R.H. : Compressors (total) KW IDU fans (total) (at max. speed) KW ODU fans (total) (at max. speed) KW Total : KW 6. Compressor 7. Compressor model 8. Compressor make 10. Type of Compressor Recip./ Scroll/ Rotary 12. Maximum ambient temperature at which machine can operate continuously. °C 13. ODU dimensions L mm W mm H mm 14. IDU dimensions L mm W mm H mm 15. ODU fan CFM (total) 16. ODU fan KW (total) 17. IDU fan CFM (total) 18. IDU fan KW (total) 20. Type of filters 21. Speed control available for IDU fan? Yes/ No 22. Noise level – IDU at 1 m dB 23. Noise level – ODU – at 3 m dB 24. Permissible voltage range _______ volts +/- ___% 28. Nearest service station distance (km) TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  10. 10. 211 AIR DISTRIBUTION Scope: The scope of this section comprises of supply, fabrication, installation, testing and commissioning of all sheet metal/ aluminium ducts as specified in the Bill of Quantities, supply, installation, testing, commissioning and balancing of air flow across all grilles, registers, diffusers and equipment, in accordance with these specifications and the general arrangement shown on the Drawings. Duct Materials: All ducts shall be fabricated from galvanized steel sheets/ aluminium sheets of the following thickness as indicated in Schedule of Quantities. G. S. S. ALUMINIUM Rectangular ducts up to 75 cm 24 Gauge 22 Gauge Rectangular ducts from 76 to 150 cm and round ducts. 22 Gauge 20 Gauge Rectangular ducts from 151 to 225 cm 20 Gauge 18 Gauge Rectangular ducts greater than 225 cm 18 Gauge 16 Gauge Sheet metal ducts shall be fabricated out of galvanized steel sheets. Fabrication of ducts shall be through Triplex lock former or multiple lock formers, conforming to relevant BIS Codes. Sheets used shall be produced by Hot Dip Process and galvanizing shall be Class V - Light Coating of zinc. Samples of sheet from each lot selected at random by Owner’s site representative shall be subject to approval & gotten tested for thickness and zinc coating at contractor’s expenses. Zinc coating should be per IS:277. All ducts shall be fabricated and installed in workmanlike manner, generally conforming to relevant BIS Codes. Round exposed ducts shall be die-formed for achieving perfect circle configuration. a. Ducts so identified on the Drawings shall be acoustically lined with thermal insulation as described in the section “Insulation” and as indicated in Schedule of Quantities. Duct dimensions shown on Drawings are overall sheet metal dimensions inclusive of the acoustic lining where required and indicated in Schedule of Quantities. b. Ducts shall be straight and smooth on the inside with neatly finished joints. All joints shall be made airtight. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  11. 11. 212 c. All exposed ducts up to 60 cm width within conditioned spaces shall have slip joints - no flanged joints. The internal ends of slip joints shall be in the direction of airflow. Ducts and accessories within ceiling spaces, visible from air-conditioned areas shall be provided with two coats of mat black finish paint. d. Changes in dimensions and shape of ducts shall be gradual. Air-turns shall be installed in all vanes, arranged to permit the air to make the turn without appreciable turbulence. e. Ducts shall be fabricated as per details shown on Drawings. All ducts shall be rigid and shall be adequately supported and braced where required with standing seams, tees, or angles, of ample size to keep the ducts true to shape and to prevent buckling, vibration or breathing. f. All sheet metal connection, partitions and plenums required to confine the flow of air to and through the filters and fans shall be constructed of 18 gauge GSS/ 16 gauge aluminium, thoroughly stiffened with 25 mm x 25 mm x 3 mm galvanized steel angle braces and fitted with all necessary inspection doors as required, to give access to all parts of the apparatus. Doors shall be not less than 45 cm x 45 cm in size. g. Plenums shall be panel type and assembled at site. Fixing of galvanized angle flanges on duct pieces shall be with rivets heads inside i.e. towards G. S. sheet and riveting shall be done from outside. h. Rubber lining 4 mm thick shall be used between duct flanges instead of felt, in all ducting installation. i. All ducts shall be installed generally as per tender Drawings, and in strict accordance with approved shop drawings to be prepared by the Contractor. j. The Contractor shall provide and neatly erect all sheet metal work as may be required to carry out the intent of these Specifications and Drawings. The work shall meet with the approval of Client / Consultant in all its parts and details. k. All necessary allowances and provisions shall be made by the Contractor for beams, pipes, or other obstructions in the building, whether or not the same are shown on the Drawings. Where necessary to avoid beams or other structural work, plumbing or other pipes, and/ or conduits, the ducts shall be transformed, divided or curved to one side, (the required area being maintained) all as per the site requirements. l. If a duct cannot be run as shown on the Drawings, the Contractor shall install the duct between the required points by any path available, in accordance with other services and as per approval of Client’s Engineer. m. All duct work shall be independently supported from building construction. All horizontal ducts shall be rigidly and securely supported, in an approved manner, with TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  12. 12. 213 trapeze hangers formed of galvanized steel rods and galvanized steel angle/ channel under ducts at no greater than 2 meter center. All vertical duct work shall be supported by structural members at each floor. All duct supports shall be through galvanized steel insert plates left in slab at the time of slab casting. Galvanized steel cleat with a hole for passing shall be welded to the plates. Trapeze hanger formed of galvanized steel rods and angles/ channels shall be hung through these cleats. Wherever uses of metal insert plates are not feasible, duct support shall be through rawl plugs by drilling holes in concrete slab and inserting rawl plug and bolts. n. Ducting over furred ceiling shall be supported from the slab above, or from beams, after obtaining approval of Client’s Engineer. In no case shall any duct be supported from false ceiling hangers or be permitted to rest on false ceiling. All metal work in dead or furred down spaces shall be erected in time to occasion no delay to other Contractor’s work on the building. o. Where metal ducts or sleeves terminate in woodwork, tight joints shall be made by means of closely fittings heavy flanged collars. Where ducts pass through brick or masonry openings, wooden frame work shall be provided within the opening and crossing ducts provided with heavy flanged collars on each side of wooden frame work, so that duct crossing is made leak-proof. p. All ducts shall be totally free from vibration under all conditions of operation. Whenever duct work is connected to fans, air handling units or fan coil units that may cause vibration in the ducts, ducts shall be provided with one flexible connection shall be constructed of fire retarding flexible heavy canvas sleeve at least 10 cm long securely bonded and bolted on both sides. Sleeve shall be made smooth and the connecting duct work rigidly held by independent supports on both ends. The flexible connection shall be suitable for pressure at the point of installation. Dampers: a. Dampers: All duct dampers should be of G.S.S.16G opposed blade & of robust construction and tight fitting. The design, method of handling and control shall be suitable for the location and service required. b. Dampers shall be provided with suitable links levers and quadrants as required for their proper operation. Control or setting devices shall be made robust, easily operable and accessible through suitable access doors in the ducts. Every damper shall have an indicating device clearly showing the damper position at all times. c. Dampers shall be placed in ducts at every branch supply or return air duct connection, whether or not indicated on the Drawings, for the proper volume control and balancing of the system. Supply & Return Air Registers: TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  13. 13. 214 Supply & return air registers shall be of either steel or aluminium sections as specified in schedule of quantities. Steel construction registers shall have primer Coat finish whereas extruded aluminium registers shall be either anodized or Powder Coated as specified in Schedule of Quantities. These registers shall have individually adjustable louvers both horizontal and vertical. Supply air registers shall be provided with key operated opposed blade extruded aluminium volume control dampers anodized in matt black shade with stove enamel paint. a. The registers shall be suitable for fixing arrangement have concealed or visible screws as approved by Architect. Linear continuous supply cum return air register shall be extruded Aluminium construction with fixed horizontal bars at 0°/15°/30°/45° inclination & flange on both sides. The thickness of the fixed bar louvers shall be minimum 5.5 mm in front and 3.8 mm in rear with rounded edges and flange shall be 20 mm/ 30 mm wide as approved by Architect. The grills shall be suitable for concealed fixing. Volume control dampers of extruded aluminium anodized in black colour shall be provided in supply air duct collars. For fan coil units horizontal fixed bar grills as described shall be provided with flanges on four sides & suitable for clip fixing. b. All registers shall be selected in consultation with the Architect. Different spaces shall require horizontal or vertical face bars, and different width of margin frames. These shall be procured only after obtaining written approval from Architect for each type of register. c. All registers shall have a soft continuous rubber/ foam gasket between the periphery of the register and the surface on which it has to be mounted. The effective area of the registers shall not be less than 66% of gross face area. d. Registers shall be adjustable pattern as each grill bar shall be pivotable to provide pattern with 0° to + 45° horizontal and deflection downwards. Bars shall hold deflection settings under all conditions of velocity and pressure. e. Bar longer than 45 cm shall be reinforced by set-back vertical members of approved thickness. f. All volume control dampers shall be anodized in Mat black shade. Supply & Return Air Diffusers: Supply & return air diffusers shall be as shown on the Drawings and indicated in Schedule of Quantities. Mild steel diffusers/ dampers shall be factory coated with rust- resistant primer. Aluminium diffusers shall be powder coated & made from extruded aluminium section as specified in schedule of quantities. a. Rectangular Diffusers shall be steel/ extruded aluminium construction, square & rectangular, diffusers with flush fixed pattern for different spaces as per schedule of quantities. These shall be selected in consultation with the Architect. These shall be procured only after obtaining written approval from Architect for each type of diffuser. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  14. 14. 215 b. Supply air diffusers shall be equipped with fixed air distribution grids, removable key-smudge volume control dampers, and anti-smudge rings as required in specific applications, and as per requirements of schedule of Quantities. The extruded aluminium diffusers shall be provided with removable central core and concealed key operation for volume control damper. c. Linear Diffuser shall be extruded aluminium construction with removable core, one or two-way blow type. Supply air diffusers shall be provided with volume control/ balancing dampers within the supply air collar. Diffusers for different spaces shall be selected in consultation with the Architect, and provided as per requirements of schedule of Quantities. All diffusers shall have volume control dampers of extruded aluminium construction anodized in mat black shade. d. Linear Diffuser shall be extruded aluminium construction multi slot type with air pattern controller provided in each slot. Supply air diffusers shall be provided with Hit & Miss volume control dampers in each slot of the supply air diffusers. Diffusers for different spaces shall be selected in consultation with the Architect and provided as per requirements of Schedule of Quantities. Measurements for Ducting: Unless otherwise specified, measurements for ducting, for the project shall be on the basis of centerline measurements described herewith. a. Duct Work shall be measured on the basis of external surface area of ducts. Duct measurements shall be taken before application of the insulation. The external surface area shall be calculated by measuring the perimeter comprising overall width and depth, including the corner joints, in the center of each duct section, multiplying with the overall length from flange face to flange face of each duct section and adding up areas of all duct sections. For tapered rectangular ducts, the average width and depth shall be considered for perimeter, whereas for tapered circular ducts, the diameter of the section midway between large and small diameters shall be adopted, the length of tapered duct section shall be the center line distance between the flanges of the duct section. For special pieces like bends, tees, reducers, branches and collars, mode of measurement shall be identical to that described above using the length along the center line. The quoted unit rate for external surface of ducts shall include all wastage allowances, flanges and gaskets for joints, nuts and bolts, hangers and angles and angle/ flat with double nuts for supports, felt strip between duct and support, vibration isolator suspension where specified or required, inspection chamber/ access panel, splitter damper with quadrant and lever for position indication, turning vanes, straightening vanes, and all other accessories required to complete the duct TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  15. 15. 216 installation as per the Specifications. These accessories shall not be separately measured nor paid for. b. Special Items for Air Distribution shall be measured by the cross-section area perpendicular to air flow, as identified herewith : i. Grilles and registers - width multiplied by height, excluding flanges. Volume control dampers shall form part of the unit rate for registers and shall not be separately accounted. ii. Diffusers - cross section area for airflow at discharge/ capture area, excluding flanges. Volume control dampers shall form part of unit rate for supply air diffusers and shall not be separately accounted. iii. Linear diffusers - shall be measured by linear measurements only, not by cross- sectional areas and shall exclude flanges for mounting of linear diffusers. The supply air plenum for linear diffusers shall be measured with ducting as described earlier. iv. Fire dampers - shall be measured by their cross sectional area perpendicular to the direction of airflow. Quoted rates shall include the necessary collars and flanges for mounting, inspection pieces with access door, solenoid valves etc. No special allowances shall be payable for extension of cross section outside the air stream. v. Flexible connection - shall be measured by their cross sectional area perpendicular to the direction of airflow. Quoted rates shall include the necessary mounting arrangement, flanges, nuts and bolts and treated-for-fire requisite length of canvas cloth. vi. Kitchen Hoods - shall be measured by their cross sectional area at the capture point of fumes, parallel to the surface of kitchen equipment. Quoted rates shall include the grease filters, provision for hood light, suspensions arrangement for the hood, profile to direct the air to ventilation ducts and provision for removable drip tray. Testing and Balancing: After the installation of the entire air distribution system is completed in all respects, all ducts shall be tested for air leaks by visual inspection. The entire air distribution system shall be balanced using an anemometer. Measured air quantities at fan discharge and at various outlets shall be identical to or less than 5% in excess of those specified and quoted. Branch duct adjustments shall be permanently marked after air balancing is completed so that these can be restored to their correct TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  16. 16. 217 position if disturbed at any time. Complete air balance report shall be submitted for scrutiny and approval, and four copies of the approved balance report shall be provided with completion documents. ◊◊◊◊◊◊ TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  17. 17. 218 PIPING Scope: The scope of this section comprises the supply and laying of pipes, testing and balancing of all drain water and refrigerant piping required for the complete installation. All piping inclusive of fittings shall follow the applicable Indian Standards. Pipe Sizes: Pipe size shall be as required for the individual fluid flows, for providing smooth noiseless balanced circulation of fluids. Drain Piping: a. All pipes to be used to condensate drain and fittings shall be galvanized steel class “B” (medium class) conforming to relevant BIS Codes. b. All jointing in the pipe system shall be by screwed/ welded joints and/ or by screwed flanges using 3 mm 3 ply rubber insertion gaskets. Pipe threads and flanges shall be as per relevant BIS Codes. c. All pipe supports and nuts and bolts shall be milk steel, hot dip galvanized. d. Fittings shall be galvanized steel “medium class” malleable casting of pressure rating suitable for the piping system. Sufficient number of flanges and unions shall be provided for future cleaning and servicing of piping. Tee-off connection shall be through equal or reducing tees. e. All condensate drain piping shall be insulated and painted as per the section “Insulation” if indicated in Schedule of Quantities. Refrigerant Piping: a. All refrigerant pipes and fittings shall be soft/ hard drawn copper tubes and wrought copper/ brass fittings suitable for connection with silver solder/ Copper – phos. b. All joints in copper piping shall be sweet joints using low temperature brazing and/ or silver solder. Before jointing any copper pipe or fittings, its interiors shall be thoroughly cleaned using acetone. The piping shall be continuously kept clean of dirt etc. while constructing the joints. Subsequently, it shall be thoroughly blown out using carbon dioxide/ nitrogen. c. Refrigerant lines shall be sized to limit pressure drop between evaporator and condensing unit to less than 0.2 Kg per sq. cm. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  18. 18. 219 d. After the refrigerant piping installation has been completed, the refrigerant piping system shall be pressure tested using Freon mixed with nitrogen/ carbon dioxide at a pressure of 20 Kg per sq. cm (high side) and 10 Kg per sq. cm (low side). Pressure shall be maintained in the system for a minimum of 12 hours. The system shall then be evacuated to a minimum vacuum of 70 cm of mercury and held for 24 hours, during which period, change in vacuum shall not exceed 12 cm of mercury. Vacuum shall be checked with a vacuum gage. e. All refrigerant piping shall be installed strictly as per the instructions and recommendations of air conditioning equipment manufacturers. Piping Installation: a. Contractor must keep in view the specific openings in buildings and other structures through which pipes are designed to pass. b. Piping shall be properly supported on, or suspended from, stands, clamps and hangers as specified and as required. The Contractor shall adequately design all the brackets, saddles, anchors, clamps and hangers and be responsible for their structural sufficiency. c. Vertical risers shall be parallel to walls and column lines and shall be straight and plumb. Risers passing from floor to floor shall be supported at each floor slab by clamps or collars attached to pipe and with a 15 mm thick rubber pad or any resilient material. Where pipes pass through the terrace floor, suitable flashing shall be provided to prevent water leakage. Risers shall have a suitable clean out at the lower point and air vent at the highest point. d. All piping work shall be carried out in workmen like manner, causing minimum disturbance to the existing services, buildings, roads and structure. The entire piping work shall be organized, in consultation with other agencies work, so that laying of pipe supports, pipes and pressure testing for each area shall be carried out in one stretch. e. Cutouts in the floor slabs for installing the various pipes are indicated in the Drawings. Contractor shall carefully examine the cutouts provided and clearly point out where the cutouts shown in the Drawings do not meet with the requirements. Measurement for Piping: Measurement for piping for the project shall be on the basis of center line measurements described herewith. Refrigerant piping for all a/c units shall be measured as one way, one circuit per unit. That is, even if a typical 11 TR machine is having 2 circuits and 2 sets of suction and liquid pipes, the piping should be measured as only one pipe, thus the rate should be TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  19. 19. 220 quoted assuming 2 running meters of suction pipe and 2 running meters of liquid pipe, if B.O.Q. mentions quantity of 1 running meter. Same measurement procedure shall apply for cabling between units. ◊◊◊◊◊◊ TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  20. 20. 221 INSULATION Scope: The scope of this section comprises the supply and application of insulation conforming to these specifications. Material: Insulation material shall be Resin bonded Glass wool lined with Aluminium Foil / Elastomeric Nitrile Rubber / Cross linked expanded Polyethylene / Expanded Polystyrene / Expanded Polyurathene Foam as specified in BOQ, and of density and thickness as specified in BOQ. Thickness of the insulation shall be as specified for the individual application. Each lot of insulation material delivered at site shall be accompanied with manufacturer test certificate for thermal conductivity values and density. Samples of insulation material from each lot delivered at site shall be selected at random for approval and shall be tested for thermal conductivity values and density at contractor’s cost by Construction Manager. Adhesive used for setting the insulation shall be non-flammable, vapour proof adhesive, Shalimar CPRX compound, or approved equal, cold setting compound. Duct Lining: Ducts so identified and marked on Drawings and in Schedule of Quantities shall be provided with acoustic lining of thermal insulation material as follows: The inside surface for the ducts shall be covered with adhesive, and provided with wooden battens 25 mm wide, 25 or 50 mm thick, treated with selenium and fire resistant paint, screwed on the inside of duct, spaced not more than 60 cm centers. The gaps between wooden battens shall be filled with 25 to 50 mm thick, about 60 x 60 cm wide cut panels of Resin bonded Glass fiber of density 40 Kg/ Cubic m. These insulation slabs shall be fixed to the sheet metal with cold setting adhesive compound. The inside surface shall be covered with RP tissue paper and 26 gauge perforated aluminium sheet having at least 15% perforation. The aluminium sheet shall be screwed to wooden battens using cup washer and neatly finished to give true inside surfaces. Use of nails for nailing shall not be permitted. Duct Insulation: External thermal insulation on ducts shall be provided as follows: Duct surfaces should be cleaned. 25/50 mm thick Glass wool roll of density specified in tender BOQ, lined with Aluminium foil should be wrapped over all sides of duct with the help of bituminous adhesives in a manner to leave no air gaps between the duct surface & TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  21. 21. 222 insulation. Metal clips and / or metallic straps should be used for this purpose wherever necessary. The joints should be then sealed with minimum 50 mm thick aluminium self - adhesive tape. Duct Attenuators: Attenuators shall be installed in ducts in accordance with requirements of drawings and as included in Schedule of Quantities. a. Attenuators shall be of steel construction with casings out of minimum 22 G galvanized steel. Acoustic fill shall be inert, non-hygroscopic, vermin proof, fiber glass of required density adequately protected against corrosion and covered with 26 G perforated aluminium sheets. Attenuators shall be supplied complete with flanges. b. Acoustic performance of the attenuators (net insertion loss) shall meet or exceed the values listed below : OCTAVE BAND CENTRE FREQUENCY Hz 63 125 250 500 1K 2K 4K 8K Insertion loss dB 900 mm long attenuators 2 7 12 19 23 23 18 11 Insertion loss dB 1500 mm long attenuators 6 10 18 30 42 34 23 14 c. The pressure drop values of the silencers shall be indicated for each duty. d. Manufacturers shall submit a test certificate for acoustic and aerodynamic performance of the attenuators. Attenuators shall be tested in accordance with ACMA test methods/ BS 4718 and insertion loss and self generated noise for each octave band and pressure drop shall be stated in the schedule. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  22. 22. 223 Measurement of Insulation: Measurement for duct and pipe insulation for the project shall be on the basis of center line measurements described herewith: Pipe Insulation: shall be measured in units of length along the center line of the installed pipe, strictly on the same basis as the piping measurements described earlier. The linear measurements shall be taken before the application of the insulation. It may be noted that for piping measurement, all valves and orifice plates and strainers are separately measurable by their number and size. It is to be clearly understood that for the insulation measurements, all these accessories including cladding, valves, orifice plates and strainers shall be considered strictly by linear measurements along the center line of pipes and no special rate shall be applicable for insulation of any accessories, fixtures or fittings whatsoever. Duct Insulation & Acoustic Lining: shall be measured on the basis of surface area along the center line of insulation thickness. Thus the surface area of externally thermally insulated or acoustically lined duct shall be based on the perimeter comprising center line (of thickness of insulation) width and depth of the cross section of insulated or lined duct, multiplied by the center-line length including tapered pieces, bends, tees, branches, etc. as measured for bare ducting. ◊◊◊◊◊◊ TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  23. 23. 224 VENTILATION FANS CAPACITY: AS PER SCHEDULE ENCLOSED. Fans should be of make as per list of makes approved, of centrifugal forward/ backward curved DIDW / SISW type, or of axial flow type, as mentioned in Bill of Quantities. The fans should be provided with required drive set (direct / pulley & belt). Necessary guards and alignment/ tightening facilities should be provided. Base frame foundation bolts and vibration isolation pads should form a part of supply package. Inlet & outlet flexible connections with fasteners should also form a part of supply package. The fans should be statically & dynamically balanced at operating speed & certification of that effect must be produced with supply. The entire assembly should be accessible for maintenance. The fan should be selected to operate at a speed within the most efficient operating range of the pressure flow curve. Charts/ curves must be submitted along with the technical specifications. Motor should be selected to withstand a flow with at least 20% more than design parameters, and / or 20% less static. Efficiency of fans at operating conditions should be more than 70%. @@@@@ TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  24. 24. 225 DATA TO BE SUBMITTED WITH OFFER : VENTILATION FANS 1. Make 2. Model / Type 3. Casing : a) M.O.C. b) Treatment c) Thickness 4. Fan : a) Make b) Model c) Size i) Width ii) Diameter d) Qty. e) Blades type f) Speed g) Flow h) Static i) Power consumed at operating conditions j) Power consumed at 20% excess flow k) Performance curves l) Type of lubrication m) Drive arrangement n) Blades MOC o) Whether statically & dynamically balanced p) Type of bearings q) Efficiency at design conditions 5. Motor : a) Make b) Type c) RPM d) Rating e) Enclosure f) Insulation g) Full load current h) No load current i) Frame size j) Efficiency at operating conditions k) Power consumption at operating conditions l) Performance curves 6. Overall : a) Operating weight TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  25. 25. 226 b) Noise level at 3 m 7. Base frame/ base plate included Yes / No 8. Foundation bolts included Yes / No 9. Anti-vibration pads included Yes / No TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  26. 26. 227 ELECTRICAL PANELS Scope: The scope of this section comprises of fabrication, supply, erection, testing and commissioning of electric control panels. Work should be carried out in accordance with the Specifications, Local Rules, Indian Electricity Act 1910 as amended up to date, and rules issued there under, Regulations of the Fire Insurance Company and relevant BIS Codes of Practice. The control panels should be BIS approved and manufactured by a reputed manufacturer and should be IP 52/ IP 54. The panels should be manufactured by a manufacturer having certification of manufacturing panels for 50 KVA short circuit current rating from C.P.R.I. Construction Features: The Control panel should be sheet steel cabinet for indoor installation, dead front, floor mounting/ wall mounting type. The control panel should be totally enclosed, completely dust and vermin proof and should be with hinged doors, Neoprene gasket and padlocking arrangement. Steel sheets used in the construction of panel should be 2 mm thick and should be folded and braced as necessary to provide a rigid support for all components. Joints of any kind in sheet metal should be seam welded, all welding slag should be grounded off and welding pits wiped smooth with plumber metal. All panels and covers should be properly fitted and square with the frame, and holes in the panel correctly positioned. Fixing screws should enter into holes tapped into an adequate thickness of metal or provided with wing nuts. Self-threading screws should not be used in the construction of Control panels. A base channel of 75 mm x 75 mm x 5 mm thick should be provided at the bottom for floor mounted panels. Minimum clearance of 200 mm should be provided between the floor of Control panel and the lowest unit. The control panel should be of adequate size with a provision of 25% spare space to accommodate possible future switchgear. Switches should be arranged in multi-tier. Knockout holes of appropriate size and number should be provided in the Control Panel in conformity with the location of cable/conduit connections. Removable sheet steel plates should be provided at the top to drill holes for cable entry at site if required. Every cabinet should be provided with Trafolyte or engraved metal nameplates. All panels should be provided with circuit diagram engraved on PVC sheet. All live accessible connections should be shrouded and minimum clearance between phase and earth should be 20 mm and phase to phase should be 25 mm. All equipment such as meters and indicating lamps etc. should be located adjacent to the unit with which it is associated and care should be taken to achieve a neat and TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  27. 27. 228 symmetrical arrangement. Facility should be provided for termination of cables from both above and below the control panel. Where cables enter from below, cable boxes should be fitted at the rear and arranged in tiers to facilitate making connections to the upper and lower units. Clamps should be provided to support the weight of the cables. All power wiring inside the control panel should be colour coded and control wiring ferruled for easy identification. Wiring System: All L T power cabling between MCC and motors should be carried out with 415 volts grade PVC insulated, overall PVC sheathed aluminium conductor armoured cables. Cables should be sized by applying proper derating factor. All control wiring should be carried out by using 1100 volts PVC insulated copper conductor wires in raceways or in conduit. Minimum size of control wiring should be 1.5 sq.mm PVC insulated copper conductor wires. Minimum size of conductor for power wiring should be 4 sq.mm 415 volts grade PVC insulated copper conductor wires in conduit. Circuit Compartment: Each circuit breaker, contactor and relay should be housed in a separate compartment and should have steel sheets on top and bottom of compartment. Sheet steel hinged locable door should be duly interlocked with the breaker in the “ON” position. Safety interlocks should be provided to prevent the breaker from being drawn out when the breaker is in “ON” position. The door should not form an intergral part of the draw out portion of the panel. Sheet steel barriers should be provided between the tiers in a vertical section. Instrument Accommodation: Adequate space should be provided for accommodating instruments, indicating lamps, control contactors and control fuses etc. These should be accessible for testing and maintainance without any danger of accidental contact with live parts of the circuit breaker and bus bar. “ON” lamps should be provided on all outgoing feeders. Bus Bars and Bus Bar Connections: The bus bar and interconnections should be of aluminium and of rectangular cross section suitable for full load current for phase bus bars and 50% for neutral bus bar and should be extendable on either side. The bus bars and interconnections should be insulated with heat shrinkable sleeve and should be colour coded. The bus bars should be supported on glass fibre reinforced thermosetting plastic insulated supports at regular intervals to withstand the force arising from in case of short circuit in the system. All bus bars should be provided in a separate chamber and should be shrouded throughout, all connections should be done by bolting and additional cross section area to be provided to compensate for the holes drilled in the bus bars. All connections between bus bars and breakers should be through solid strips of proper size to carry full rated current and insulated with insulating tapes. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  28. 28. 229 Cable Compartments: Cable compartment of adequate size should be provided in the control panels for all incoming and outgoing cables entering from bottom or top. Adequate and proper supports should be provided in cable compartments to support cables. Labels: Aluminium Anodised labels should be provided on all incoming and outgoing feeder switches. Circuit diagram showing the arrangements of the circuit inside the Control Panel should be pasted on inside of the panel door and covered with transparent plastic sheet. Cable alley and bus chamber should be identified on all panels. Rubber Mat: Rubber mat should be provided to cover the full length of front of all panels and rear of panels where back space should be available for working from the rear. Materials: All materials should be of the best quality complying with the BIS (Bereau of Indian Standards) specifications. Materials used should be subject to the approval of the Client and samples of the same should be furnished where required. a. Air Circuit Breakers: The Air Circuit Breakers should be sheet metal enclosed flush front, draw out type, and should be provided with a trip free manual operating mechanism with mechanical “ON” -- “OFF” indications. The circuit breaker should be suitable for continuous rating and of capacity as called for. It should be possible to switch “ON” and “OFF” the Circuit Breaker without opening the circuit breaker compartment door. The operating handle and the mechanical trip push button should be at the front of the breaker and integral with the breaker. Cradle: The cradle should be so designed and constructed as to permit smooth withdrawl and insertion of the breaker into it. The movement should be free from jerks, easily operable and should be on steel balls/ rollers and not on flat surfaces. Protective Devices: C. T. operated IDMT Relays for short circuit and earth fault operation should be provided for all air circuit breakers. Suitable under voltage tripping mechanism for voltage less than + 10% of full rate voltage should be provided. b. Selector Switch: Where called for, selector switches of rated capacity should be provided in control panels, to give the choice of operating equipment in selective mode. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  29. 29. 230 c. Moulded Case Circuit Breakers: Moulded Case circuit Breaker should be of motor duty and should be suitable for continuous load, manufactured in accordance with relevant BIS Codes. d. Starters: Each motor should be provided with a starter of suitable rating. Starters should be in accordance with relevant BIS Codes. All Star Delta and ATS Starters should be fully automatic. Starter contactors should have 3 main and 2 Nos. NO/ NC auxiliary contacts and should be air break type suitable for making and breaking contact at minimum power factor of 0.35. For design consideration of contactors the starting current of connected motor should be assumed to be 6 times the full load current of the motor in case of direct-on-line starters and 3 times the full load current of the motor in case of Star Delta/ Reduced Voltage Starters. The insulation for contactor coils should be of Class “E”. Operating coils of contactors should be suitable for 220/ 415 + 10% volts AC, 50 cycles supply system. The contactors should cut out when voltage drops to 90% of the rated voltage. The housing of the contactors should be heat resistant and having hinge impact strength. Each starter should have thermal overload protection on all three phases. e. Over Load Relays: Contactors should be provided with a three element, positive acting ambient temperature compensated time lagged thermal over load relays with adjustable setting. Relays should be directly connected for motors upto 35 HP capacity. C. T. operated relays should be provided for motors above 35 HP capacity Heater circuit contactors may not be provided with over load relays. f. Current Transformers: Current transformers should be of accuracy class I and suitable VA burden for operation of the connected meters and relays. These should be resin bounded and epoxy coated. g. Single Phase Preventer: Single phase preventers should be provided only incase single phasing prevention feature is not built in the over load. Single Phase preventers should be in conformity with relevant BIS standards. Single phase preventers should act when the supply voltage drops down to 90% of the rated voltage or on failure of one or more phases. h. Time Delay Relays: Time delay relays should be adjustable type with time delay adjustable from 0-180 seconds and should have one set of auxilliary contacts for indicating lamp connections. i. Indicating Lamp & Materials: All meters and indicating lamps should be in accordance with BS 37 and BS 39. The meters should be flush mounted type. The indicating lamp should be of low wattage. Each main panel should be provided with TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  30. 30. 231 voltmeter 0-500 volts with three way and off selector switch, CT operated ammeter of suitable range with three nos. CTs of suitable ratio with three way and off selector switch, phase indicating lamps, and other indicating lamps as called for. Each phase indicating lamp should be backed up with 5 amps fuse. Other indicating lamps should be backed up with fuses as called for. j. Toggle Switch: Toggle switches, where called for, should be in conformity with relevant BIS Codes and should be of 5 amps rating. k. Push Button Stations: Push button stations should be provided for manual starting and stopping of motors/ equipment as called for Green and Red colour push buttons should be provided for “Starting” and “Stopping” operations. “Start” or “Stop” indicating flaps should be provided for push buttons. Push buttons should be suitable for panel mounting and accessible from front without opening door, Lock lever should be provided for “Stop” push buttons. The push button contacts should be suitable for 6 amps current capacity. l. Conduits: Conduits should be of mild steel and should be Hard drawn, stove enameled inside and outside with minimum wall thickness of 1.6 mm for conduits upto 32 mm diameter and 2 mm wall thickness for conduits above 32 mm diameter. GI pull wires should be installed in the conduit while laying the conduit. m. Cables: M. V. Cables should be PVC insulated aluminium conductor and armoured cables conforming to BIS Codes. Cables should be armoured and suitable for laying in trenches, duct, and on cable trays as required. M. V. Cables should be termite resistant. Control cables and indicating panel cables should be multi core PVC insulated copper conductor and armoured cables. n. Wires: 415 volts grade PVC insulated copper conductor wires in conduit should be used. Cable Laying: Cable should be laid generally in accordance with BIS Code of Practice. Cables should be laid on 14 gauge perforated MS sheet cable trays, and cable drops/ risers should be fixed to ladder type cable trays fabricated out of steel angle. Access to all cables should be provided to allow cable withdrawl/ replacement in the future. Where more than one cable is running, one dia spacing should be provided to minimize the loss in current carrying capacity. Cables should be suitably supported with Galvanized saddles when run on walls/ trays. When buried, they should be laid in 350 mm wide and 750 mm deep trench and should be covered with 250 mm thick layer of soft sifted sand & protected with bricks, tiles. Special care should be taken to ensure that the cables are not damaged at bends. The radius of bend of the cables when installed should not be less than 12 times the diameter of cable. 1.1 KV cable should be buried 600 mm below ground level. Wire Sizes: TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  31. 31. 232 For all single phase/ 3 phase wiring, 415 volts grade PVC insulated copper conductor wires should be used. The equipment inside plant room and AHU room should be connected to the control panel by means of insulated copper conductor wires of adequate size in exposed conduits. Final connections to the equipment should be through wiring enclosed in galvanized flexible conduits rigidly clamped at both ends. An isolator should be provided near each motor/ equipment wherever the motor/ equipment is separated from the supply panel through a partition barrier or through ceiling construction. PVC insulated single standard copper conductor wires should be used inside the control panel for connecting different components and all the wires inside the control panel should be neatly dressed and plastic beads should be provided at both the ends for easy identification in control wiring. The minimum size of control wiring should be 1.5 sq.mm PVC insulated standard soft drawn copper conductor wires drawn through conduit to be provided for connecting equipment and control panels. All the switches, contactors, push button stations, indicating lamps should be distinctly marked with a small description of the service installed. The following capacity contactors and overload relays should be provided for different capacity motors or as per manufacturer’s recommendation. MOTORS TYPE OF STARTER CONTACTOR CURRENT CAP. OVERLOAD RELAY RANGE 5 HP Motors D.O.L. 16 Amps 6 - 40 Amps 7.5 HP Motors D.O.L. 16 Amps 9 - 15 Amps 10 HP Motors Star Delta 32 Amps 9 - 15 Amps 12.5 HP Motors Star Delta 16 Amps 9 - 15 Amps 15 HP Motors Star Delta 25 Amps 9 - 15 Amps 20 HP Motors Star Delta 32 Amps 14 - 23 Amps 25 HP Motors Star Delta 32 Amps 14 - 23 Amps 30 HP Motors Star Delta 40 Amps 20 - 33 Amps 35 HP Motors Star Delta 40 Amps 20 - 33 Amps 40 HP Motors Star Delta 40 Amps 30 - 50 Amps 45 HP Motors Star Delta 63 Amps 30 - 50 Amps 50 HP Motors Automatic Star Delta 63 Amps 30 - 50 Amps 60 HP Motors - do - 125 Amps 30 - 50 Amps 75 HP Motors - do - 125 Amps 90 - 150 Amps 100 HP Motors - do - 200 Amps CT operated Relay 135 HP Motors - do - 300 Amps - do - 150 HP Motors Auto Transformer 300 Amps - do - 200 HP Motors - do - 300 Amps - do - 250 HP Motors - do - 400 Amps - do - 300 HP Motors - do - 400 Amps - do - TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  32. 32. 233 400 HP Motors - do - 600 Amps - do - 600 HP Motors - do - 900 Amps - do - Earthing: Earthing should be provided as per IS:3043-1987 and should be copper strips/ wires. The main panel should be connected to main earthing system of the power supply. All single phase metal clad switches and control panels be earthed with minimum 3 mm diameter copper conductor wire. All 3 phase motors and equipment should be earthed with 2 numbers distinct and independent insulated copper wires/ tapes as follows : i) Motors upto & including 10 HP rating. 2 Nos. 3 mm dia copper wires. ii) Motors 12.5 HP to 40 HP capacity. 2 Nos. 4 mm dia copper wires. iii) Motors 50 HP to 75 HP capacity. 2 Nos. 6 mm dia copper wires. iv) Motors above 75 HP. 2 Nos. 25 mm x 3 mm copper strips. All switches should be earthed with two numbers distinct and independent copper wires tapes as follows: i. 3 phase switches & control panels upto 60 amps rating. 2 Nos. 3 mm dia copper wires. ii. 3 phase switches & control panels upto 63 amps to 100 amps rating. 2 Nos. 4 mm dia copper wires. iii. 3 phase switches & control panels 125 amps to 200 amps rating. 2 Nos. 6 mm dia copper wires. iv. 3 phase switches, control panels, bus ducts, above 200 amps rating. 2 Nos. 25 mm x 3 mm Copper tapes. The earthing connections should be tapped off from the main earthing of electrical installation. The overlapping in earthing strips at joints should be riveted with brass rivets & brazed in approved manner. Lugs of adequate capacity and size should be used for all termination of wires. Lugs should be bolted to the equipment body to be earthed after the metal body is cleaned of paint and other only substance, and properly tinned. Drawings: Shop drawings for control panels and wiring of equipment showing the route of conduit cable should be submitted by the contractor for approval of Client & Consultant before starting the fabrication of panel and starting the work. On completion, four sets of complete “As-installed” drawings incorporating all details like, conduits routes, number of wires in conduit, location of panels, switches, junction/ pull boxes and cables route etc. should be furnished by the Contractor. Testing: TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  33. 33. 234 Before commissioning of the equipment, the entire electrical installation should be tested in accordance with relevant BIS codes and test report furnished by a qualified and authorised person. The entire electrical installation should be got approved by Electrical Inspector and a certificate from Electrical Inspector should be submitted. All tests should be carried out in the presence of the Client’s engineers. Painting: All sheet steel work should undergo a process of degreasing, through cleaning, and painting with a high corrosion resistant primer. All panels should then be baked in an oven. The finishing treatment should be by application of synthetic enamel paint of approved shade. Measurement of Electrical Control Panels: Panels should be counted as number of units. Quoted rates should include as lumpsum (NOT measurable lengths) for all internal wiring, power wiring and earthing connections from the control panel to the starter and to the motor, control wiring for interlocking, power and control wiring for remote start/ stop as well as indication as per the specifications. The quoted rate of panel should also include all accessories, switchgear, fuses, contactors, indicating meters and lights as per the specifications. πππππ TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  34. 34. 235 ELECTRICAL DISTRIBUTION PANEL FOR A/C PLANT (EXTENSION SIDE) QTY.: 1 No. INCOMER: Main Incomer Isolator - MCCB 630 Amps., with protection against earth fault / phase reversal / single phasing / low / high voltage / phase imbalance. Voltmeter Ammeter Voltmeter Selector Switch Ammeter Selector Switch CTs Busbars for incomer Busbars for outgoing R-Y-B indicating Lamps Test push button to test all lamps OUTGOING: Sections1 to 11 (each to have): MCCB 63 Amps., with earth fault protection. Terminals for outgoing & earthing ELECTRICAL DISTRIBUTION PANEL FOR A/C PLANT (MAIN SEATING SIDE) QTY.: 1 No. INCOMER: Main Incomer Isolator - MCCB 630 Amps., with protection against earth fault / phase reversal / single phasing / low / high voltage / phase imbalance. Voltmeter Ammeter Voltmeter Selector Switch Ammeter Selector Switch CTs Busbars for incomer Busbars for outgoing R-Y-B indicating Lamps Test push button to test all lamps OUTGOING: Sections1 to 9 (each to have): MCCB 63 Amps., with earth fault protection. Terminals for outgoing & earthing SPECIAL CONDITIONS FOR HVAC WORK TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  35. 35. 236 1.0 TECHNICAL DOCUMENTATION WITH OFFER: In order to have a fair comparison among all quotes, and to ensure an installation conforming to the specifications, the tenderers must submit all technical information asked for in the technical specifications / BOQ in the prescribed format. The offer shall be considered invalid in absence of the data sheets, or short or wrong information being provided. Similarly, the first step after issue of GFC drawings to the successful bidder shall be submission of shop drawings, technical submittals for all equipment and submission of a block bar chart by the bidder. The contractor is supposed to prepare above, after detailed survey of site and GFC drawings. Any work carried out in absence of approved shop drawings shall not be considered for measurement. 2.0 PRINTED TERMS: Tenderers’ standard printed/ cyclostyled terms and conditions will not be acceptable. If the Contractors are departing from any of the tender specifications or terms and conditions, they should specifically bring this out in their quotation. Technical data of all equipment must be furnished as per formats provided. 3.0 QUANTITIES: The Probable Quantities of the several items of work furnished are for the tenderer, convenience. The schedule of Probable Quantities is liable to alteration by omission, deletion or addition at the discretion of the Client/ Consultant at the time of execution of work. The Contract is on item rate basis. The rates must be kept valid for ordering up to the completion and handing over of the project. 4.0 DEVIATIONS FROM TENDER SPECIFICATIONS / CONDITIONS: In order to install an effective system, the tenderers may quote with deviations. However, tenderers must quote for tender BOQ and quote separately for deviations, if any. On scrutiny of such deviated quotes, the client may or may not consider the deviation for comparison. 5.0 COORDINATION: The contractor will coordinate with the related agencies, including but not limited to the following during all stages of contract and maintenance period. • Project Management Team of Client. • Architects & Consultants. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  36. 36. 237 • Related other Contractors. • Agencies of various inter related services. • Local, State & Central Govt. bodies. 6.0 POWER & WATER: Client shall provide power & water to contractor at one point in the building on chargeable basis. The contractor shall follow all the statutory requirements of safety and electrical Inspectorate for installing own DG sets, without any obligations of Client. 7.0 STORAGE SPACE: Client shall provide open space to the contractor for storage of materials etc. The quantity of space required must be notified to the client along with the Bar Chart. The contractor shall arrange for hutment/ roofing/ storage racks/ any other facilities required at his cost. The bidder, on receiving the space, shall use the place/s in a proper manner, without causing damage to the property/ people working in the premises. The materials/ tools shall be stored in a proper manner as recommended by standard / manufacturer recommended practices and should be open for inspection to the Client/Consultant. The responsibility of well being of the materials up to handing ever stage shall be on the Bidder/ Contractor/ Manufacturer/ Supplier. 8.0 SHARING OF WORKPLACE: Due to the fact that all agencies like civil, electrical, plumbing, carpentry, false ceiling etc., shall be working together at site, the contractor shall work in co- ordination with other agencies and workplace should be shared. The bar chart should be superimposed over bar chart of other agencies and sufficient floats should be provided for each activity. 9.0 DEMOBILISATION: The Contractor shall within a week after the completion of the work clear from the site his labour, material and machinery and hand over the premises to the Client in neat and clean condition. If he fails to do so within the said period, the Owners have the right to get the same done through agencies and recover the cost from the Contractor. 10.0 ERECTION TOOLS: The successful bidder shall have to arrange for all necessary tools & tackles, consumables, lights & lighting fixtures, scaffoldings, temporary structures, lifting tools, cranes, chain pulley blocks, ropes hoists, erection consumables, cables etc. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  37. 37. 238 at their cost & resources. The client shall offer only open space and electricity at one point in the premises. Electricity shall be chargeable at prevailing rate decided by Client which shall be informed to the bidder before starting the work. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  38. 38. 239 11.0 SUB-CONTRACTORS: Appointment of the Sub-Contractor, if any, shall be made after getting written consent from the Consultants/ Client. 12.0 COMPLETION PERIOD: The time or times for completion shall be as per signed document and shall include Govt., Public and religious holidays, bad weather and storms etc. The Contractor shall not be entitled to request for extensions of time or any rights, indemnities or damages due to these factors. The Contractor shall not be deemed to have completed its obligations unless a signed Completion Certificate has been issued by Client. 13.0 PROGRESS CHART/ BAR CHART: • The Contractor shall prepare a Bar Chart (MS project-98) indicating completion time as per Contract and submit the same for approval to Architects within 15 days from the date of letter of intent. The said Bar Chart on approval from Architects & Consultant shall be a part of Contract document. • The approved Bar Chart shall have not less than 5 nos. of summary task covering a specific area or floor, which is mostly independent of other summary tasks. Each summary task shall be considered as independent project. The Bar Chart shall be in a form approved by the Architect and consultant. • The Bar Chart shall indicate manpower employed for each activity and the number of skilled and unskilled manpower proposed to be employed in each week for each activity, based on productivity, to comply with completion time. • The chart shall indicate scheduling of samples, shop drawings, approval, delivery of material, Inspection/ testing and commissioning of the systems. • The Contractor shall submit weekly reports (in triplicate), activity wise and clearly indicate the variation from the original chart and indicate action taken to comply with the contract. 14.0 RATE OF PROGRESS: If for any reason, which does not entitle the Contractor to an extension of time, the rate of progress of the Works or any section is at any time, in the opinion, of Consultants, too slow to comply with the time of completion, Client shall notify TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  39. 39. 240 the Contractor who shall there upon shall take such steps as are necessary, subject to approval of Consultant, to expedite progress so as to comply with the time of completion. The Contractor shall not be entitled for any additional payment for taking such steps. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  40. 40. 241 15.0 CONTRACTOR’S MANPOWER: The Contractor shall employ a full time Engineer on the Works who shall be responsible for the superintendence of the work and shall receive on behalf of the Contractor, notices, directions and instructions from Consultant. Contractor’s Representative shall attend all meetings as informed from time to time. 16.0 PRICE BASIS: The prices quoted for equipment/ materials & services should be on F.O.R. site delivered basis, that is, inclusive of basic price, packing & forwarding charges, central excise duty, import duties, countervailing excise duty, transportation, unloading charges, any other Govt. taxes, levies & duties, for supply of equipment/ materials. The manufacturers/ suppliers/ contractors should consider all taxes applicable in the state/ city including octroi (if applicable), state entry tax (if applicable), works contract tax, sales tax etc. The bidders should also provide in a separate sheet, mention the various taxes/ levies considered while quoting. The contractors, within 8 days from receiving Letter of Intent, shall furnish a list of documents required for availing any tax benefits/ exemptions. The prices quoted should also be inclusive of installation charges, including opening packing, shifting to respective locations, erection on respective foundations, leveling, fixing vibration isolators/ foundation bolts/ supports, end connections for piping/ ducting/ cables with necessary termination items like flanges/ counter flanges/ gaskets/ nut-bolts/ fasteners/ lugs/ glands/ flexible connections for ducts etc., and with all necessary consumables for installation work & commissioning, like welding gases/ electrodes, fluxes, cleansing chemicals, lubrication grease/ oils, refrigerant, sealing chemicals, adhesives etc. 17.0 “ASBUILT” DRAWINGS: On completion of the job, Contractor shall submit “AS-BUILT” drawings to the client in following modes: Hard Copies : 6 sets CD : 2 sets 18.0 PAINT: The entire installation including all equipment, all piping after erection of equipment and commissioning shall be painted with approved quality paint. The TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  41. 41. 242 standard I.S.I. colour code shall be allowed. The ducts coming behind the R.A. grills shall be painted with black paint matte finished. 19.0 DESIGN: The equipment capacities, sizes and quantities indicated in the schedules of the tender are to be taken as a general guideline only, and do not relieve the manufacturer/ contractor/ supplier for any responsibility as far as the final performance of the system is concerned. The manufacturer/ contractor/ supplier should carry out his own heat load calculations to confirm the equipment sizing and stand guarantee for the performance. The tenderer shall give the detailed heat load calculation giving therein calculated tonnage, ADP, dehumidified & fan CFM etc., pressure drop calculation and all such necessary data, with construction drawings. 20.0 PERFORMANCE & TEST FORMATS: The successful bidder/s must prove the performance of system/ individual equipment by way of conducting trials on truly calibrated and so certified tools & gauges in presence of the client’s representative. The tools, gauges, calibration & manpower shall be arranged at his own cost by the bidder/s, and the formats shall be approved by the consultant before the contract is signed. The formats shall form a part of contract. The test reports must be submitted in a properly bound format on completion of testing. 21.0 MODE OF MEASUREMENT: The final measurements of the work will be taken within 4 weeks of completion of entire A.C. system. Duct Measurements shall be based on finished duct surface i.e. perimeter, centerline length excluding flanges (i.e. flange to flange). No separate measurements will be allowed for turning vanes, straightening vane installed with the duct. No separate measurements will be taken for damper area, canvass connection, etc. These items have to be included as per separate provisions made in BOQ. For piping, the measurement for piping shall be taken from the centerline of the piping including all fittings, except valves/ strainers. TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  42. 42. 243 No separate rate shall be allowed for fittings. For duct insulation, external area shall be calculated on basis of the finished duct surface after insulation. For internal lining of duct, area of duct before lining will be considered. All steel measuring tapes, instruments, tools, flow meters, manometers, pressure sensors, gauges, thermometers, calorimeters, sound measuring instruments, velometers, particle counters, scaffolding, and ladders that may be required for taking measurement or carrying out testing shall be supplied by Contractor. 22.0 GUARANTEE/ WARRANTY: The contractor/ manufacturer/ supplier must guarantee the system/ equipment/ materials/ supplied against faulty design/ material/ components/ workmanship giving rise to breakdowns/under-efficiency, increase in power consumption/ reworks/ replacements. The guarantee should cover lubricants, gaskets, grease, glands, seals, fuse links, indicating lamps, contactors, transformers, coils, heater strips, contact kits, gauges, instruments or any other components. The guarantee should be valid for a period of 12 calendar months from the date of handing over, irrespective of the date of deliveries. Descaling, or cleaning of fins / filters etc., if necessary shall be carried out by the contractor at his cost during Warranty/ Guarantee period. 23.0 SPARES: Tenderer shall furnish a list of recommended spares for the various equipments along with their quotation. Likewise a list of tools required for maintenance shall also be furnished separately. The tools and spares required for 1 year operation shall be included in the cost of concerned item. 24.0 TOOLS & GAUGES: In order to keep a close track of the health of the system, a set of well-calibrated gauges & tools should be supplied and maintained/ re-calibrated at site by the manufacturer/ contractor/ supplier. The cost of replenishment/ repairs/ re- calibration shall be borne by the manufacturer/ contractor/ supplier during warranty period. The set shall be handed over to the client on completion of warranty period. 25.0 OBSOLESCENCE: Microprocessor based panels, or equipment with high obsolescence rates must be backed up with guarantee upgradation to meet latest versions, without any extra TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  43. 43. 244 cost, for a period of 10 calendar years from the day of handing over. In the event of extra savings in operating cost, the client may pay for the upgradation, if felt necessary/ viable, but it should not be a compulsion on the client to go in for upgradation only because of lack of spare parts or technicians. 26.0 COLLABORATIONS & MAINTAINANCE: In case of imported equipment, complete responsibility for smooth operation and maintenance shall lie on the bidders, for the warranty period. Extra claims for change in collaboration, or dispute with principals, or non-availability of spares due to upgradation by principals or any such other reasons shall not be entertained. APPROVED MAKES OF VARIOUS EQUIPMENT / MATERIALS Chillers Carrier / Dunham-Bush / Kirloskar Mcquay / Trane / York Pumps Bell & Gosset / Armstrong / Grundfoss Air Handling Unit Blue Star / Carrier / Carryaire/ ETA-Novair / HPS / Zeco AHU Fans Nicothra / Punker / Nadi / Krugar / Novair Ventilation fans GEC / Krugar / Nadi / ABB / Greenheck / C Doctaire Hi Wall Split A/C units Blue star / Carrier / Daikin / Hitachi / LG / Voltas / York Cassette A/C Units Blue star /Carrier / Daikin / Hitachi / LG / Voltas /York Packaged A/C units Blue Star / Carrier / Voltas / LG / Daikin / York / Trane Roof Top packaged A/c unit Carrier / Trane / York / Lennox / LG Ventilation fans Kruger / Nadi/ ABB /Greenheck/ C Doctaire Pipes up to 200 mm dia. TATA / Zenith Pipes above 200 mm dia. Jindal Drain Pipes Tata / Zenith Butterfly valves Audco/ Intervalve / C & R / Papillon Gate/ Globe/ Non-return valve L & T/ BDK / Intervalve Ball valves Audco / RB Balancing valves TA/Advance / Intervalve / Danfoss Pressure gauges H. Guru / Fiebig TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)
  44. 44. 245 G. S. Sheets Nippon / SAIL. / Jindal EPS slabs Beardsell / Loyd / Modifoam Closed cell elastomeric Nitrile Armacell Crossed – linked Polyethelene Supreme / Paramount / Trocellene Glass wool insulation Kimmco / Owens coring / UP Twiga Motorised valves Landis & Staefa / Johnson Controls / Sauter / Danfoss Actuator motor Landis & Staefa / Johnson Controls / Sauter / Danfoss Humidistats Penn / Honeywell / Danfoss PID controllers Landis & Staefa / Johnson Controls / Sauter Room Thermostats Landis & Staefa / Johnson Controls / Sauter BTU meters Honeywell / Johnson / Siemens Filters Airtech / Dyna / other on approval Grills & Diffusers Dynacraft / Air Master / Cosmos/ Rolastar Motors Siemens / Crompton/ Kirloskar / ABB Fire Dampers Carryaire / Nutech./ Dynacraft / Cosmos / others on approval Hessian-Fire retardant Novair / Puroguard Flexible Connection Flexionics / Masors / Resistoflex Springs , Neoprene pads Resitoflex Air Circuit Breakers L & T / Siemens/ GE/ Group Schneider Contactors, push button & Relays & Timer Siemens/ GE/ Group Schneider MCCB GE/ABB/ Group Schneider MCB & ELCB L & T / MDS/ Siemens / GE SFUs, Rotary switches L & T / Siemens / GE HRC Fuses & fittings L & T/ Siemens /GE Toggle switches/ Selector switches Kaycee Ammeter/ Voltmeter Automatic Electric Indicating lamps L & T / Siemens / GE Power & control cables CCI / Universal Current Transformers Automatic Electric / Ind coil Cable socket Dowels Cable Glands Comet Connectors Elmex Energy Meter Enercon Wires inside panels Finolex / Universal / CCI TECNOCL INSTITUTE OFHVAC M EP www.hvac-guru.com since26years Demo (http://www.verypdf.com) This is trial version If you want get full version, please register it, thank you. www.verypdf.comDemo (http://www.verypdf.com)Demo (http://www.verypdf.com)

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