Comprehensive Maintenance of 7 9 12 TR Precision Air Cooled Packaged type AC Units and attending faults of conventional AC Packages on call basis for the Different TE RLU Bldg under the jurisdiction of SSA Surat and SSA Valsad in Surat BA 2nd call

Amount

Sub Head - II (Call Basis - Conventional A.C. Pkg .)

Comprehensive maintenance of following 7/9/12 TR Precision AC Unts for the Different TE / RLU Bldg under the jurisdiction of BSNL ED-Surat as per the details given in the Section -I attached herewith and as per relevant section by deploying the required staff including specialized man power and by arranging required spares , tools and plants etc, to keep the service operational up to the standard complete as required. a) 2x7 TR 1st Floor, NGN Switch room i/c OLT, BTS, sharing site at TE Vapi Main

b)4x7 TR ,2nd Floor WTR Transmission room at T.E Textile Market

c) 3x7 TR, 3rd Floor LMG NGN at TE Bldg. Textile Market

d) 2x7 TR ,1st floor EWSD Switch room at TE Varachha.

e) 4x7 TR HPAC ,1st floor EWSD Switch room at TE Karimabad Surat.

Sub Head - II (Call Basis - Conventional A.C. Pkg .)

Site Names- (TE Bldg 4x7 TR Textile Market and TE 3x7TR Mahidharpura)

Attending faults with minor material / Service/ Repairing & Chemical cleaning of following capacity conventional / High precision package type AC unit complete with cleaning of condenser coils & evaporator coils by using caustic soda solution & pressurized water spray, combing of fins, removing all dust/dirt, refixing of all loose covers/spares, tightening foundation bolts, electrical connections, cleaning of prefilter & fine filters, adjusting all controls for the performing of desired performance , fixing of all loose shutters/doors with gaskets & nut bolts, cleaning & dedusting of indoor PAC unit & condenser unit complete with etc. as directed by Engg.- In -Charge.. a) 7 / 7.5 / 9 TR

Replacement of existing single compressor of faulty AC unit of following type and capacity etc. comp. i/c credit of non return of faulty compressor as reqd.( Make and model as of exising compressor or approved by Engineer In Charge so as to minimize the modification in existing unit) including leakage testing, pressure testing, vaccuumization and charging of fresh refregerant gas in complete circuit etc. complete as reqd.(NOTE:- Rate quoted shall be without GST.The credit of which should be available to BSNL.GST is reimbursable only if it is available to BSNL.) (i) Package AC Units 7TR Double Circuit. (Z2R48 K3E-TFD-522 OR ZR54KC-TFD-522)

Replacement of following accessories in existing PAC units for attending faults of 7/ 7.5 / 9 TR single/Double circuit capacity of approved make i/c pumping down of refrigerant system, fixing, jointing, modification if required, brazing, connection, testing & commissioning complete with dismantling of old accessories etc as required i/c HPSV A/C Unit.(NOTE- The defective material shall be the property of agency & firm should consider suitable price rebate for the same while quoting. The material under replacement shall be similar to existing defective material or as per product directory) a )Expansion Valve

Thermostat dial type

Liquid Valve.1/2"

Liquid line filter / Drier 5 /8 " / 3/8 "

Blower Fan motor belt

Pedestal type bearing for blower fan shaft

Capacitor 6 MFD for 1 Phase condenser motor

HP cut out switch manual reset type

HP/LP combined cut out switch

LP cut out switch auto reset type

HP pressure gauge, 50mm dia (0-500 psi)/ with capillary

LP pressure gauge, 50 mm dia(-30-0-0-300 psi) with capillary

Compressor O/L Relay

Replacement of Brass/GM angle valve 1/4" dia

Replacement of defective / by passed Brass/GM safety valve of condenser receiver unit of size 1/2" & 5/8"

Replacement of defective/leaked Brass/GM threaded suction & discharge valves suitable for 7 TR compressor

Replacement of defective Brass/GM 3/8" dia Liquid line valve in ref. line with knob

Crank case heater for compressor with lead wires, 220V

4 Pole , 440 Volts, Power contactor - 32 Amp

4 Pole , 440 Volts, Power contactor - 16 Amp

4 Pole , 440 Volts, Power contactor - 6 Amp

Contactor Coil suitable for 230 V / 440 V

Condenser fan blade suitable for Double circuit Pkg.AC units i.e for 3.75TR.

Condenser fan blade suitable for single circuit Pkg.AC units i.e for 7.5TR.

Rewinding of condensore motor of 0.75 to 1.00 HP capacity suitable for operation on 3 Phase, 415 Volts AC Supply etc. complete as required.

Supplying and Charging fresh refrigerent R-22 / R- 410 including, Nitrogen pressure testing & arresting leakage , vaccumization / dehydrating of entire circuit including pump down the system etc complete as reqd.

Carrying out leak testing of A.C. Package condensor coils , evaporator coils, other parts of the refrigerant circuit with nitrogen gas, brazing the leak points, flushing the system, vaccuumizing, making the system leak proof, supplying and charging the system with R-22 / R-410 refrigerant gas including testing & commissioning etc. complete as reqd.(Cost of gas included in item no 7)

Site Visit for checking and attending the defects / faults with minor petty material (Costing below Rs 100/-) including attending minor complaints / faults at various BTS / Exchanges, damage of control wiring of Split AC / AC Pkg Units by the rat cutting etc. as below etc. complete as required (For payments for this item, faults must be attended) . Within Muncipal Corporation area