REPAIR/MAINTENANCE FOR 3 X 90 TR AC PLANT ALONGWITH COOLING APPLIANCES INSTALLED AT NDC UNDER GE NEW DELHI, DELHI CANTT-10

Amount

Attending the complaints of equipment(other than which are included in srl item No. 34) including replacement of all worn out/defective parts as and when required /detected including T&P required for repair, replacement and transportation if any part required to take to workshop for repair all as directed. Note :- Materials required to be replaced shall be measured and paid for separately under relevant item as "Supply only". Balance items required for rectification of faults/ defects if any including fixing/filling/laying charges shall be included in rates quoted for this item.

M&L for Re-winding of electric motor for submersible pump of capacity 3 phase 415V upto 10 HP with copper super enamelled winding wire of same gauge with class H Insulation, water sealed after taking out burnt winding from stator and cleaning slots etc., varnishing, drying reassembling, testing including transportation charges complete all as specified and directed .

M&L for painting of plant, pumps, panels, cooling tower etc. with two coats of synthetic enamel paint of existing colour complete all as specified and directed .

Supply & installation of cross linked closed cell thermal insulation of 30 mm over chilled water pipes of any size thermal conductivity of insulation would not exceed 0.038 w/mk at 400C. Material is fire retardant & self-extinguishing and certified class 1 certified as per BS 476 part &. It is CFC free. On combustion it would not emit HCN NO+ NO2 and SO2 + H2S gases. Smoke generated would be lighter than air and white in colour so as to allow easy exit passages in case of fire. Thermal insulation would be protected by thermal insulation protective coating of aluminium sheet not less than 0.30 mm thick in short length complete all as specified and directed .

Supply only of compressor oil suitable for Trane make as recommended by Trane for screw chiller Model : ERTWA-211 all as directed.

Supply only pre filters 15 micron capacity of size 56 cm x 56 cm x 5cm all as directed.

Supply only fine filter 5 micron capacity of size 56 cm x 56 cm x 5 cm all as directed.

Supply & charging refrigerant gas R-22 complete all as specified and directed .

Supply only water heating element 3 phase (3x6) 18 KW 415 volts for hot water generator confirming to IS marked(as per sample) all as directed..

Supply only bearing suitable for 7.5KW/10 HP condenser pump all as directed..

All as per Srl item No. 10.00 here-in-before but for 5 HP condenser pump all as directed..

Supply and fix in replacement water pressure gauge 0 to 10.6 kg all as specified & directed.

Supply and fix in replacement butter fly valve 150 mm all as directed.

Supply & fix in replacement butter fly valve 125 mm all as specified & directed.

Supply & fix in replacement strip heater 2 KW for humidity control system all as specified & directed.

Supply & fix in replacement over load relay ML type 9-15 amp all as specified & directed.

Supply & fix in replacement contactor ML 1.5, 3 pole, 440 volts 50 Hz all as specified & directed.

Supply & fix in replacement contactor MNX 25 with 1NO+ 1NC , 3 pole, 440 volts 50 Hz all as specified & directed.

Supply only water tray of FCU made out of GI sheet, 20 gauge with insulation of size 48"x6"x2" all as directed..

Supply only water tray of FCU unit made out of GI sheet, 20 gauge with insulation of size 39"x6"x2" all as directed.

Supply only water tray of FCU unit made out of GI sheet, 20 gauge with insulation of size 13"x9'x2" all as directed.

Supply and fix in replacement fan blade assembly complete for cooling tower motor of capacity 7.5 HP complete all as specified and directed

Supply and fix in replacement MCCB three pole (3 pole) 415 Volts grade 250 amps rating 35 KA rupturing capacity and both thermal and magnetic adjustable type complete all as specified and directed .

Supply only LED indicator bulb(red/green )colour of existing size all as specified & directed.

S&F in repair/replacement MS ERW pipe of size 125 mm complete with flange, bend whichever required for fixing including welding work as required for complete all as specified & directed.

S&F in repair/replacement of MS pipe of size 100 mm complete with flange, bend whichever required for fixing complete in all respect including welding work as required on site all as specified & directed.

S&F in repair thermometer of existing size and capacity to the chiller pipe line complete all as specified & directed.

S&F in replacement water flow switch of size 25 mm including nipple and socket complete all as specified & directed.

Supply and laying in repair/replacement PVC control cable LT 1100 volt grade with copper conductor of size 1.5 sq. mm, 8 core fixed to wall /floor/ in cable trays complete all as specified and directed .

S&F in replacement cooling tower fins suitable for 200 TR capacity vertical counter flow complete all as directed.

S&F in replacement Y-stainer of size 150 mm complete all as specified & directed.

S&F and fix in replacement gun metal gate valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed of size 25 mm bore complete all as specified & directed..

S&F and fix in replacement gun metal gate valves, cast copper alloy, screwed down, high pressure, with crutch or butterfly handle, screwed both ends for iron pipe or for unions and fixed of size 50 mm bore complete all as specified & directed..

Comprehensive and preventive maintenance of 03 Nos screw type chilling plant each of 90 TR capacity Model ERTWA-211 having semi hermetic sealed compressor, shell and tube type condenser with micro processor in including material and replacement of all parts pertains to above model chiller, the contractor will ensure that OEM is liable to give per month preventative maintenance visits and also on call on requirement basis as and when required.

(b) Comprehensive and preventive maintenance also includes descaling with chemical, overhauling of condensing, cooling, pumps, pipe lines & replacement of siphon with gauge of AHU

(c ) All the parts pertaining to 3x90 TR chillers model ERTWA-211 Make should be supplied and replaced by OEM. The cost of parts shall deemed to be included in quoted rates. No extra payment shall be made on this account.

(d) Contractor is to act promptly on call and any complaint shall be attended with in-02 (Two) hours as the area is very sensitive and delay is not acceptable.

(e) The contractor will maintain the temp & humidity as under :- Inside condition Library room, dining hall Other area and lecture room DB Temp 72º F +4º F (22º C + 2º C) 75º F + 4º F(24º C ± 2º C) RH 55% ± 5% 55% ± 5%

(f) Descaling of condensers shall be carried out by contractor through OEM before on set of summer season.

(g) T&P required for comprehensive & preventive maintenance shall be provided by the M/S Trane it self.

(h) Comprehensive & preventive maintenance shall be carried out at site NDC irrespective of distance.

(j) Spectro chemical oil analysis and oil replacement shall be carried out by contractor through M/S Trane in the beginning of the contract and after every year.

(k) In case need arises to the change the compressor as a whole due to any defect M/s Trane is to inform the department well in time to avoid breakdown.

(l) The contractor to ensure the parameters of different component of central AC plant on a checklist at fortnight basis with suitable instrument

(i) Condenser (a) Water temperature IN - 32.2⁰C (b) Water temperature OUT - 36.4⁰C (c) Temperature rise - 4.2⁰C (d) Maximum permissible pressure drop 10m of water head

(ii) Chiller (a) Water temperature IN - 12.2⁰C (b) Water temperature OUT - 6.67⁰C (c) Temperature rise - 5.5⁰C (d) Maximum permissible pressure drop 10m of water head

(iii) Piping (a) Maximum flow velocity 2.5m/s

(iv) AHU (a) Max face velocity across cooling coil - 155 m/min (b) Max outlet air velocity - 610m/min (c) Max velocity across filters- (i) Micro Vee filters - 155m/min (ii) Ducting for air-conditioning Main Duct Branch Duct Max flow velocity 400 m/min 250m/min (iii) Max velocity of air at supply of air diffusers - 150m/min

(m) Instruments needed for all type of testing will be supplied by the contractor and rate for the same to be included in the quoted rate.

Labour for checking and attending complaints of ACs, water coolers, Refrigerators etc. of any capacity, rectification of minor defects and make the equipment functional complete all as directed.(any parts required for replacement shall be measured and paid for separately under relevant item of BOQ/Sch 'A' as "Supply only") .

Servicing of Window/split type AC 1.5/2/3 Ton capacity of any make / model by taking out the AC, Cleaning of evaporating coil, condensing coil with water & brush to remove dust including cleaning of filter, greasing oiling of fan motor and checking of electric circuit for smooth functioning of AC (unserviceable spares required to be replaced shall be measured & paid for "Supply only" separately under respective items.

Supply only Running capacitor 36 mfd 230 volt suitable for AC 1.5 Ton.

Supply only Running capacitor 45 mfd 230 volt suitable for AC 2 Ton.

Supply only Running capacitor combination 50 mfd + 6 mfd 230 Volt for AC 2 Ton.

Supply only Running capacitor 80-100 mfd 230 volt.

Supply only Running capacitor 4/6 mfd 230 volt .

M & L for Gas filling R-22 in existing Split / window AC for 1.5/2/3 Ton capacity complete all as specified & directed.

Supply only starting relay suitable for 1.5Ton capacity AC complete all as directed.

All as per item No 43.00 here-in-before but for 2 Ton capacity.

All as per item No 43.00 here-in-before but for 3 Ton capacity.

Supply only over load protector suitable for 1.5/2/3 Ton capacity AC complete all as directed.

Supply only thermostat switch suitable for 1.5/2/3 Ton capacity AC complete all as directed.

Supply only in replacement new compressor 1.5 Ton capacity reciprocating type of existing make (other unserviceable spares required to replace with AC compressor shall be measured & paid for separate under respective items).

All as per item No 48.00 here-in-before but 2/3 Ton capacity.

Supply only in replacement 'R' type compressor capacity 1.5 Ton of existing make ( 'R' type means the compressor repaired/ reconditioned by the manufacturer or got repaired from authorised dealer of the manufacturer) complete all as directed..

All as per item No 50.00 here-in-before but AC 3 Ton capacity.

Supply and fixing in repair air filter synthetic/ nylon as per existing size and shape suitable for 1.5/2 Ton capacity window type ACs complete all as directed..

All as per item No 52.00 here-in-before but for 1.5/2/3 Ton capacity for Split type ACs.

Supply and fixing indoor unit fan motor 1/4,1/5 HP single/double shaft as per existing model suitable for any make ACs as per requirement complete all as directed..

All as per item No 54.00 here-in-before but for air blower of Split ACs of 1.5/2/3 Ton capacity of existing make complete all as directed..

Supply and fixing 1.5 TR capacity window type AC kit including condensing coil, evaporating coil, front grill, blower motor, blower and fan, chasis base plate complete except compressor complete all as directed..

Supply & fixing in repair condenser fan blade made out of aluminium/plastic suitable for 3 Ton capacity window type AC complete all as directed.

All as per item No 57.00 here-in-before but for Split ACs of 1.5/2/3 Ton capacity.

Supply & fixing in repair evaporating air blower made out of aluminium/plastic suitable for 2 Ton capacity for window type AC all as directed .

All as per item No 59.00 here-in-before but for air blower of Split ACs of 1.5/2/3 Ton capacity.

Supply and Fixing in repair synthetic rubber tube insulation of thickness 9 mm & Internal diameter 6.0 mm (1/4")for refrigerant copper piping of split AC units including suitable PVC tape complete all as specified & directed.

All as per item No 61.00 here-in-before but internal dia 9 mm (3/8") -do-

All as per item No 61.00 here-in-before but internal dia13 mm (1/2")-do-

S&F copper tubing heavy duty inner dia 6 mm (1/4") for refrigerant for Acs complete all as specified & directed.

S&F copper tubing heavy duty inner dia 9 mm (3/8") for refrigerant for Acs complete all as specified & directed.

S&F copper tubing heavy duty inner dia 13 mm (1/2") for refrigerant for Acs complete all as specified & directed.

S&F condensing coil suitable for 2/3 Ton split/window type ACs as per existing size/shape complete all as specified & directed.

Supply and fix brass ball valve of size 20x5/8 mm complete all as specified & directed.

Supply and fix brass ball valve with strainer of size 20x5/8 mm complete all as specified & directed.

NOTE : 1 The contractor should detail minimum one AC mechanic & one helper to attend complaints in NDC areas. 2. The complaint should be attended on same day. 3. If the complaint not attended/not completed on same day recovery will be done as follows. a) for first day Rs 1000/- b) For second day Rs 2000/- c) For next every day Rs 2500/-

S&F Compressor Oil filter size 207 to 212 with existing suitable size for chiller unit of AC Plant complete all as specified & directed.

Supply and fix fan belt suitable for air handling unit complete all as specified & directed.

Servicing of Package type AC 8.5 Ton capacity of any make / model by taking out the AC, Cleaning of evaporating coil, condensing coil with water & brush to remove dust including cleaning of filter, greasing oiling of fan motor and checking of gas leakage in gas pipe line & record the temp in register of library etc. complete all as specified & directed

Supply and fix ductable 8.5 TR scroll expansion valve suitable for 8.5 TR ductable unit complete with connected accessories complete all as specified & directed.

Servicing & maintenance to 285 KW Hot water unit of 3X90 TR AC plant including replacement 4 Nos of 17 KW cap of heater wherever required, removing the carbon/corrosion, cleaning the carbon brushes including minor spares for make serviceable the entire unit and replace of copper bushes, lugs, Ametre & Volt mtr & testing up of proper out put of wattage each heater complete all as directed.

Supply & charging R-410A suitable for 1.5/2/3 ton cap complete all as specified

M&L for checking performance/efficiency of 3x90 TR Central AC Plant with thoroughly testing of chiller unit to FCUs and to check air leakage in all AHU ducts and also to record the temperature , RH , WB, DB in entire area lecture hall, Officers Mess, library, AHU , plant and offices complete in all respect all as specified & directed . Notes:- (a) All above parameters record should be submitted by the contractor within first month of the contract. (b) Removal of insulation of chiller unit and flow measurement by ultrasonic flow meter in chiller pipe line and measurement of electrical parameter like voltage Amp etc. by power analyser (c) Reinsulating of removed insulation areas with insulation patches of all chiller units (d) Submit the actual efficiency by calculating 3 mean value/average for chiller unit of Central AC plant

M&L for laying in replacement of XLPE PVC sheathed armoured copper cable 16 sqmm 3.5 core complete all as specified and as directed .

M&L for laying in replacement of copper armoured cable 1 sqmm 6 core complete all as specified and as directed.

S&F in replacement changeover open execution type along with handle complete capacity 630 A, FN 630 TPN complete all as specified and as directed.

M&L in replacement Single phase preventer with Auto switch complete all as specified and as directed.

M&L for fixing in replacement star delta Electronic Timers Type ST 100 [9107] 0-30 secs complete all as specified and as directed.

M&L for Earthing complete with galvanised steel earth plate electrode 60×60cm.× 6mm thick, buried directly in ground (earth pit not less than 2.25 metres deep below ground level) with top edge of the plate not less than 1.5 metres below normal ground level, connected to galvanised iron strip 25×4mm by means of bolts, nuts, check nuts and washers of galvanised iron or steel all as shown in electrical plate No. 3 connected to earthing test point all as specified or indicated including testing on completion protection pipe of GI 15 mm bore med grade upto 7.5 meter length and connection of earth/neutral lead to main LT panel/ motor and pump complete all as specified and directed.

S&F 25x4mm galvanised iron strip complete all as specified and as directed .

M&L for opening of pump capacity 10 KW connections all type electrical or mechanical and transportation to workshop replacement of bearing complete all as specified and as directed.

M&L for opening of pump capacity 10 KW connections all type electrical or mechanical and transportation to workshop and replacement of gun metal impeller along with shaft of MS and transporting back to site and erecting motor and pump in alignment along with replacement of coupling complete all as specified and as directed. Complete all as specified and as directed .

M&L for replacement of HRC fuse, DIN type 125 A complete with new one along with connectors complete all as specified and as directed .

M&L for fixing of motorised butterfly valve in replacement of dia 125 mm along with actuator , pub complete suitable for single phase supply 220 V doing electric connections along with necessary alteration in existing pipelines, along with necessary welding cum joining work complete all as specified and as directed.

M&L for fixing of motorised butterfly valve in replacement of dia 65 mm along with actuator , pcb complete suitable for single phase supply 220 V doing electric connections along with necessary alteration in existing pipelines, along with necessary welding cum joining work complete all as specified and as directed .

M&L in replacement contactor 3 P, MN 110 as per site, complete all as specified and s directed .

M&L in replacement step type thermostat as per existing capacity suitable for hot water generator installed at 3x90 TR AC plant complete all as specified and directed .

S&F in repair/replacement of MS pipe of size 40 mm bore complete with flange, bend whichever required for fixing complete in all respect including welding work as required on site as specified & directed

M & L for repair and maintenance of thermal insulation with thermocol 50 mm thick and width not exceeding 200 mm covered with chicken wire mesh and 10 mm CM 1:6 on the top Edge at Supply and return pipe complete all as specified and directed .

M & L in repair/replacement thermal insulation for air duct with 13 mm Nitrile Rubber all as specified and as directed.

Supply & fix under deck insulation with 25 mm Nitrile rubber with 40-60 kg density (for AHU Room) complete all as specified and as directed.

Opening the upper sheet / side sheet of Cooling tower Cleaning, servicing of Chiller type AC Plant of any capacity / model / make for access to reserve water tank, cooling fan & cooling fins etc., M&L for washing/cleaning of cooling tower internally/ externally including cooling fins etc. with mild acid (or caustic soda hot water solution) followed by water jet including cleaning/washing all as specified and as directed

SNOWY ENGINEERING INC