WBPWD/SSEWEC /BRED /NIQ-22 /2026-27

Charges for Annual Comprehensive maintenance of 1 to 2.2 Ton capacity window /split type AC machine with necessary accessories& materials (Window type - 2 nos , Split type -118 nos. (120 Nos.AC machines X 12 Month = 1440 nos )

Annual Comprehensive maintenance of 3/4/5 Ton capacity Tower/cassette type AC machine with necessary accessories & materials . (18 Nos. AC machine X 12 Month = 216 nos )

A. Scope of Work: The scope includes routine, preventive, corrective and Breakdown maintenance of the all Window, Split, Concealed Split, cassette, ductable, Tower & Package type AC machines, starting from Power supply point (Timer/Starter) to complete AC unit, within the premises, including but not limited to Supply, repair, and replacement of all spare parts and components.

A.1. General Requirements. 1.1 Spare Parts & Components and activities Covered The contract includes repair/replacement of:  Compressor  Blower motor / fan motor  Condenser & evaporator coils  P.C.B. and Power Supply Card, wherever applicable.  Copper tubing and piping  Capacitors (mandatory P2/S2 type, IEC 60252-1 compliant)  Relays, thermostats, contactors  Remotes  Air filters  Electrical wiring and controls related to A.C. machines  Sheet metal body parts  Nitrile Rubber Insulation of different sizes  Minor Duct repair including G.I. Sheet, Thermal and Acoustic Insulation, mason covering for outside ducts etc.  Refrigerant gas  Drain Pump All replaced materials must be:  New and OEM approved quality  Approved by Engineer-in-Charge (EIC) prior to installation

The agency shall: 1.2 Materials & Consumables Provide all consumables required for maintenance, including:  Cotton waste, insulation tape, Ferrules and lugs, Lubricants &grease, cleaning agents, Soaps etc.  Fasteners, nuts& bolts, Drain pipe fittings, Copper pipe insulation, Contact cleaner spray  Belts for AHU / ductable blowers, Refrigerant  All Logbooks and/ or Register as mentioned in this document

1.3 Tools & Instruments Provide and maintain calibrated tools and instruments, including:  Digital multimeter, Digital Clamp-on ammeter  Insulation resistance tester, Thermal Imaging Scanner  Pressure gauges, Infrared thermometer and Digital Psychrometers  Decibel Meter or SPL (Sound Pressure Level) Meter  Air velocity meter / anemometer  Coil cleaning chemical sprayer  Fin comb for condenser/evaporator fins  Vacuum cleaner / blower for cleaning indoor and outdoor units  High-pressure Water jet pump for condenser coil cleaning  Vacuum pump and Refrigerant charging hose set  Nitrogen cylinder with regulator for pressure testing  Brazing set with gas cylinder  Drain line flushing pump  Complete set of screwdrivers, Line Tester, Pliers & Stripper, spanners, Allen keys, adjustable wrenches, Hackshaw & Hammer, Electric Drill machine.  Insulated ladder  Chain pulley block (for heavy equipment where required)etc

1.4 Uniform and Safety Gear (Applicable only when dedicated manpower is included in BOQ) Ensure all staff use proper uniforms. Provide at least two sets of uniforms and safety gear (helmet, Umbrella, raincoat, gumboots, etc.) to each staff member. The color end embossing should be as per direction of EIC. 1.5 Attendance & Monitoring (Applicable only when dedicated manpower is included in BOQ)  Provide biometric attendance system for agency deployed staff if dedicated manpower is considered in BOQ.  Maintain and monitor attendance records  Maintain Registers and logbooks 1.6 Security Ensure watch and ward of all installations

A.2 Preventive Maintenance The agency shall carry out the following preventive maintenance activities with minimum frequency indicated against each activity: A.2.1 Monthly Activities  Checking of Grill Temperature and Room Temperature  Measuring Supply Voltage and current drawn by the machine  Checking of Blower and Swing Motor, wherever applicable.  Checking of Thermostat for proper functioning  Cleaning of filters, coils, blowers  Checking refrigerant levels/ pressures and leakage of gas  Checking of all power and signal terminations  Checking wiring between indoor and outdoor units  Cleaning of cooling and condensing coils  Checking condition of Capacitor  Checking of Sound Level  Performance testing  Checking of any unwanted leakage current at the Indoor and outdoor units  Checking the set point of Air-condition machines and if any abnormal temperature setting is noticed, that should be reset and specifically be noted in the log book.

A.2.2Half yearly Activities  Tightening electrical connections A.2.3Annual Activities  Thorough overhauling  Painting of sheet metal/ support/ wooden frame of RAC/SRC at site A service report shall be submitted after each above activities, duly signed by the maintenance personnel and countersigned by the Agency/ Supervisor of the agency. Each and every activity and measurement value must also be entered in Log book in detail mentioning machine number, location, date & time.