REPAIR MAINT OF CENTRAL AC PLANT COOLING APPLIANCES AND REPAIR REPLACEMENT OF FAULTY UNSV UG CABLES VARIOUS TYPE OF LIGHT FITTINGS SWITCH GEAR SYSTEMS WITH CONNECTED EXTERNAL ELECTRIFICATION WORKS AT DGQA AREA AND REPAIR MAINT OF COOLING APPLIANCES

M&L for disconnecting electrical connections of motor located at the top of cooling tower,keep cables at safe custody for reconnection and dismantling and taking out fan blade assembly along with motor mounted on base frame at the top of cooling tower after cutting/dismentaling all nuts, bolts and fixtures from the mounting frame and removing whole assembly including motor and base frame from the top of cooling tower with the help of T&P for servicing of cooling tower suitable for 225 TR capacity including following complete :- (i) Cleaning the cooling tower by applying wire brush, washing powder and other solvent by removing the deposited impurities sush as silt, dust particles mud/ sand inside the dume and around the fins, cleaning of base tray and grills, pot stainer. (ii) servicing cooling tower plant through cleaning re-agent complete pipe line,including servicing of cooling tower motor and fan and make the necessary alignment with motor. (iii) Replacement of bearing if any of suitable cap if any after necessory work including gressing and replacement of nut bolts and preventing leakage if any by means of suitable adetives etc all as directed and specified. (iv) Taking out PVC fills blocks, cleaning , refixing and replacing if unserviceable as per existing location and channel direction. (v) Servicing of spray header and sprinkler assy complete. (vi) Cleaning of water strainer complete.

Supply and fixing PVC Fills in colums of size 60 x 30 x 15 cm or next higher size, honey comb/LPS pvc fills with tie rod and turn buckle of suitable size to match the system as per existing specification and requirement complete all as directed.

S& F in replacment of Float valve (brass) 25MM Ball brass valves, high pressure, with polythene float and flynut complete, screwed for iron pipe or brass ferrule and fixedcomplete all as directed.

Taking out the existing unserviceable sprinkler of cooling tower and supply, installation, testing and commissioning of new sprinkler assembly complete with header nozzle made out of galvanised iron for cooling tower size of 225 TR (as required on existing site) as specified and as directed by Engr-in-Charge. Make- DELTA/ MIHIR/ UNIVERSAL.

S&F in replacement of refrigeration filter dryer fixed in Liquid line suitable for R- 134a refrigerant ,water cooled chiller complete all as specified and directed.

Supply and fix in replacement Safety valve thread as per existing size ,water cooled central type AC plant for 180TR Capacity as per sample complete all as directed.

M&L for bailing out the water from the PVC water tanks of capacity 5000 ltr with out causing any interruption to regular water supply system and cleaning the same inside of tank thoroughly by using wire brush/scrapper for removal of deposited scales/sludge/silt etc and removing the materials out of site cleaning thoroughly with water and bleaching powder and then by chlorine solution for complete anti bacterial disinfections including writing date of cleaning on the black board with white paint all as specified and directed. (Note:- 1.Rates quoted deemed to be inclusive of T&P and safety equipments required at site 2. Water tank shall be cleaned every 3 month of interval)

Material and labour for de-scaling and complete servicing of condenser units for central type water cooled AC plants for 180 TR capacities by means of adding descaling chemical solution (HCL) into the cooling tower sump as per requirements, and running the plant pump continuously till all the scale of pipes/ shell are removed including removing side covers of condenser and cleaning the water tubes by means of nylon brushes till the scaling is removed and re-fixing of covers including replacement of neoprene rubber gasket and refixing pipe connection etc., complete all as specified and as directed by Engr-in-charge.

Material and labour for of machine and filling up R -134a refrigerant for suitable to existing compressor in HVAC water cooled central AC plants complete all as specified and as directed by Engr-in-charge.

Material and Labour for dismantling of existing Air Handling Unit of 4000 to 14800 CFM capacity , cleaning, servicing, overhauling all component of AHU, with and including cleaning of heating & cooling coil with caustic soda solution, including welding / brazing, wherever required to arrest leakages, cleaning of Pre-Micro Filters, replacing of vertical GI sheet supports, replacement of U/S foam insulation of best quality using adhesive substance to avoid cold air leakages, fabrication of bottom GI tray of existing size with drain pan made out of 16 guage thick GI Sheets duly painted over interior surface of tray, re-assembling all the dismantled components to its original position using new nut, bolt, washer and other packing material etc, with and including testing, commissioning of Air handling Unit at optimum efficiency, complete all as specified and directed by Engineer-in Charge.