PROVN OF CENTRAL AIR CONDITIONING IN MH AT LEIMAKHONG

Amount

NOTE (Applicable for all items):- The bidders/contractors are advised to read tender document & all corrigendum/ amendments and General conditions of contracts before entrying/quoting the rates. SCHEDULE 'A' PART

Supply, installation, testing and commissioning of Central type water cooled, chilled water type air conditioning plant to maintain the temparature23 ̊C±2 ̊C with relative humidity 55% ±5% with all equipments and accessories complete and comprising of the following:- (a) Screw Water Cooled Chiller Unit not less than 145 TR x 03 Nos (50% of full load capacity- 02 working and 01 Standby) conforming to tender specification and comprising of Hermetic/semi hermetic screw compressor, chiller, condenser, microprocessor control/ sensers etc suitable for R-134a refrigerant complete all as per manufacturer’s specification. (b) FRP cooling tower forced/ induced draft top/ cross flow type suitable for not less than 2 x 150 Ton AC plant with FRP body and base, water spray headers, cooling tower fins, fan with motor, supporting base frames, overflow with drain, connection with valve etc complete all as specified and as directed. (c) Centrifugal type condenser water pumps (not less than 1700 LPM , head as per friction loss calculations to be carried out by the contractor) for each condenser unit complete with suitable squirrel cage induction motor for operation at 415V 3 phase 50 Hz AC supply, base plate, electric starter with over load protection and single phase protection device (one pump for each condensing unit all as specified) (d) Centrifugal type chilled water pumps (not less than 1400 LPM , head as per friction loss calculations to be carried out by the contractor) for each chiller duly insulated complete with squirrel cage induction motor for operating at 415 Volts 3 phase 50 Hz AC supply, base plate, electric starter with overload protection, single phase preventer to match the capacity of compressor (one pump for each chiller as specified).

Item No. 1 Contd..... (e) Chilled water piping made out of mild steel heavy grade pipes (IS-1293) with its insulation of suitable diameter including all fittings, butterfly valves, non-return valves, Y type/ dashpot strainers, specials as specified and laid to floor/fixed to wall or in ducts for interconnection between water chiller, chilled water pumps and various AHUs installed in the rooms complete all as specified. Velocity in pipe shall not exceed 1.5 meter / second. (f) Condenser water piping made out of galvanized iron medium grade pipes of diffrent size with all fittings, non-return valve, Y type/ pot strainer and butterfly valves for interconnecting cooling tower condenser, cooling water pumps for circulation of condenser water. Velocity in pipe shall not exceed 1.5 meter / second. (g) Supply, installation, testing and commissioning of MS expansion tank 2000 litre made out of 5 mm thick MS sheet complete with welding work and insulated with 75 mm thick quality thermo coal, cement sand plaster 15 mm thick with CM 1:3 over chicken wire mesh, painting etc, all complete as per tender specification with inlet valve, float assembly, overflow drain connection with valve and flow indicator etc. (Make up water pipe line will be provided by the Deptt). (h) Weather making unit of 100% capacity one each for each AHU room (CFM as per design to be done by the Contractor) with independent control and centralized control in plant/room each comprising the following all as specified (Note: AHUs and ducting of plant shall be designed to achieve inside design conditions required as per Appendix enclosed. Additional AHUs required to maintain different parameters shall be ceiling mounted or outdoor type to be placed on terrace or in open area on ground floor. AHU for each Major and Minor OT will be separate):- (i) Modular AHU panels with GI sheet of 0.60 mm thick for both inner and outer casing with 25 mm PUF insulation sandwiched in between. The outer panel have pre-coating for corrosion resistance as also to provide proper finish. (ii) Blower section with forward/ backward curved centrifugal fan with TEFC motor (IP-55 and class F insulation) static pressure minimum 80mm WG or higher pressure as per the design for ICU and OTs. (iii) Drain section with 1.2 mm SS drain pan including drain water pipe duly insulated. (iv) Filter section with pre-filter and micro filter. (v) Coil section with 6/8/10/12 row chilled water coil as per design to be done by contractor with inlet and outlet thermometer. (vi) Vibration isolation pads, belts etc all complete. (vii) Humidifier kit complete with controls. (viii) Electrical Controls Panels with starter for Blower Motor, Strip heater, Humidifier with complete controls including thermostat, Humidistat, Proportionate Thermostat. (ix) Strip heaters for winter heating /reheating coil section with stepped up contacts heating thermostats as per design by the contractor etc. (x) Wall dry and web bulb thermometer in AHU rooms. (xi) Sling psychrometer- 02 Nos, Anemometer -01 No

Item No. 1 Contd..... (j) Ducting (i) Supply & Installation PGI sheet with class VII zinc, Premium, Fusible link fire damper (1 for each AHU) supply air/return air ducting with supporting/ hanging arrangement all as specified. (ii) Supply & Installation supply air / return air aluminium ducting for OTs Note:- All ducting shall terminate above the entrance of each room to be air conditioned . (iii) To make arrangement for laminar flow in all OT's with HEPA filter. (iv) Necessary connection for the supply and return air duct with damper and support . (v) Supply and erection of thermal insulation of ducting with 25 mm thick fibre glass (24 kg/m3) factory laminated with aluminium foil, complete with seal at the joints and nylon box strapping etc complete all as specified and as directed. (vi) Supply and fix 50mm thick, 24 kg/Cum density glass wool insulation covered with Polythene bag shall be provided above false ceiling (being provided by other agency) in the AHU and air-conditioned rooms where Galvalume sheet is provided or where roof is exposed to sun. (False ceiling is not in scope of this item) (vii) Supply and erection of acoustic insulation initial 6 mtr of ducting with 12mm fiberglass rigid board (48 Kg/m3), finished with 32G perforated Aluminum sheet with bolts/nuts/washers of GI etc complete all as specified and as directed. (viii) Supply and erection of all weather thermal insulation of ducting (where ever duct is exposed to outside weather) with 75m thick EPS (20 Kg/m3) tied using CPRX compound and chicken wire mesh, sand cement plastering and finally finished with 3 coats of synthetic paint of approved color and shade all complete as per tender specification. (ix) Supply, erection, testing and commissioning of powder coated Aluminium supply and return air grills, diffusers, dampers, fresh air grills, laminar flow terminals, etc with nuts/bolts/screws/washers etc complete all as specified and as directed. Note:- "All grills, diffusers, dampers, fresh air grills shall terminate above the entrance of the room to be air conditioned”. (k) Blank (l) Controls comprising of (one set for each unit):- (i) Pilot duty solenoid valves. (ii) Thermostatic expansion. (iii) Liquid line strainer (iv) water flow switches (v) Anti freeze thermostat (vi) capacity control thermostat (vii) 3 Way motorised driven thermostat. (viii) Humidistat and thermostat.

Item No. 1 Contd..... Incoming:- (a) MCCB 4 pole of suitable capacity - 01 No (b) 4 Strip copper busbar of suitable rating - 01 Set (c) Voltmeter and Ammeter - 01 Set (d) Indicating lamps (3 Nos each) - 01set Outgoing:- (a) MCCB of suitable rating for blower motor - 01 No (b) Contactors of suitable sizes for Re-heating/Pre-heating and humidification pump - 01 Set (c) DOL/Star Delta Starter for AHU motor suitable rating (Star-Delta starter to be provided if motor capacity is above 5 HP) - 01 Set (d) "ON & OFF" position indication for each outgoing -01 Set (q) Supply, install, commissioning and testing of Commercial Air curtain unit for prevention of dust and conditioned air losses, three phase 440V, 50 Hz made out of CRCA sheet of minimum thickness 18 gauge finished with two coats of red oxide primer and final coat of synthetic enamel paint (over baked) with MS CRC 18 gauge square perforated suction grills, aluminium alloy fans and three phase electric motor, nozzles etc, complete with fittings and accessories so as to produce 1 -1.5 m/s air velocity at floor level for door opening of size 64" x 96" inch complete all as specified and as directed. - 06 Nos (as per locations shown in drawings) (r) Two Nos of earthing as per SSR plate No 3 for motor control centre (M.C.C) desk type including all electrical items connected with aluminium strip 25 mm x 3mm size complete upto MCC. (s) Two Nos of earthing as per SSR plate No 3 for all electrical motors in the plant room including all electrical items connected with aluminium strip 25mm x 3mm size complete upto each equipment. (t) Two Nos of earthing as per SSR plate No 3 for each AHU units including all electrical items connected with aluminium strip 25mm x 3mm size complete up to AHU. (u) Supply and install makeup water tank PVC double layer of 3 x 10000 Ltrs capacity with float valve 25mm, GI medium grade 25mm overflow pipe, wash out pipe with 25 mm gate valve including making inlet & outlet connection complete. Pipe upto these tanks shall be provided by the deptt. Tank shall be provided on 2.0 mtr RCC staging near cooling tower. Note: Design of staging shall be got approved by GE before execution. Note:- 1. AC plant room (as marked on site plan) and AHUs are shown on the Drg. Inside design conditions required are shown in Appx 'A'. The following items are to be designed by the contractor and details as per Appx shall be submitted with supporting details and technical literature to the Accepting Officer within one month of acceptance of tender:- a. Schematic diagram and details of all equipment, cable, panel, control system, pipes. b. Design and details of Head of condenser pump, chilled water pump, AHUs, Cooling coils, Ducting (Gauge shall be as per IS), Strip heaters for preheat and reheat. Starting velocity in supply air duct for OT/ICU and other rooms shall not exceed 1000 FPM and 1200 FPM respectively. Velocity in return air duct shall be exceed 80% of supply air velocity. c. All items required for complete installation of AC plant to achieve design conditions shall be deemed to be included in this item. 2. Phase I Test for 24 Hrs shall be conducted by the Officer to be detailed by Accepting officer before Phase I completion. Phase II test will be conducted in Summer/Winter/ Mansoon season for 72 Hrs continuously. All facilities/ testing equipments including artificial load will be provided by the Contractor.

Supply, install, testing and commissioning of transformer, step down of 630 kVA capacity outdoor type, 3 phase 50 cycles (50 HZ) AC oil immersed, air naturally cooled with external cooling tubes/radiator double wound core type copper wound having no load voltage ratio 11 KV /433 volts corresponding to principal tapping, delta connected on Primary side (HV) and star connected on secondary side (LV side) in accordance with vector symbol DYN-11 with neutral brought out on LCV side for earthing and having tapping on HV side for constant output so as to alter/vary secondary voltage from +/- 2.5 % to +/- 7.5 in steps of 2.5 % to be changed by means of manually operated "OFF LOAD" tap changing arrangements complete and conforming to IS 1180 and Energy Efficiency Level -3 including making suitable size PCC platform 1.2 m high. The transformer shall be complete with all standard fittings and accessories:- (a) Oil conservator tank with filling holes and cap drain valve and oil level gauge. (b) Silica gel breather with connecting pipe first fill or dehydrating agent and oil scale. (c) Adequate No of thermometer packing including one No for accommodating bulb type thermometer (d) Drain cum bottom filter valve (e) Top filter valve (f) Prismatic oil level gauge. (g) Inspector cover (h) Jacking and lifting lugs (j) Bidirectional plane rollers-04 Nos (k) Rating and diagram plate (l) Separate neutral bushing brought out for earthing LV side (m) First filling of transformer oil confirming to IS : 335-1993 (n) Earthing terminals-02 Nos located on diagonally opposite transformer tank base.

Supply and laying cable XLPE insulated screened PVC bedded, 400 Sqmm single core (2 runs) galvanized steel strip or wire armored, (heavy duty) 1100 volts grade with stranded aluminium conductor for Transformer to LT panel, LT panel to AC plant panel including required cable lugs complete all as specified and as directed. (Each run will be measured separately)

Supply, Installation, testing and commisioning split type air conditioner 1.5 TR capacity with CFC free refrigerant R-410a inverter technology noise level for indoor unit should less than 38 DB suitable for operations on 230 Volts, 50Hz AC supply complete including all connections and connected items like copper tube electric cable and insulation etc from electric point to indoor and outdoor unit complete all as specified and as directed. (for Autopsy Room). Note:- All the accessories for fixing including stand for outdoor unit mounting and PVC pipe for drainage of water upto 6 meter length is deemed to be included in the quoted rate.

Supply and fix wall mounted Voltage stabilizer for automatic operation single phase naturally air cooled indoor type & designed for input variation between 170V to 250 V with output voltage stabilized at 230V with accuracy of +- 2.5% and of capacity 4 KVA alongwith OLR, Time delay relay 3 min complete all as specified and as directed.

MANNING & OPERATION OF AC PLANT Providing comprehensive maintenance including all consumables and manning and operation of tested and commissioned water cooled chiller water Air Conditioning Plant with all its components installed under present contract in fully serviceable state throughout the period 24 x 7 including sundays and holidays in 3 shift (one shift of 08 hours ) per day and keep the premises clean, complete all as required, as specified and as directed by Engr-in-Charge by providing requrisite manpower as under:- (i) One Operator - ITI passed in attendant operator/fitter/general mechanic with 2 years experience in relevant field ( Category - Skilled labour) (ii) One Helper - Class-X Passed (Category - Unskilled labour) Note:- (a) The scope of work shall include day to day running maintenance, cleaning of the plant and repairing if any, complaints from the concerned plant and cost of the same shall deemed to be included in the quoted rate. (b) Necessary reliever shall have to be provided during "week off day" of the regular Operator/Helper without any extra cost. Duty register shall be maintained accordingly duly approved by Engr-in-Charge.

Item No. 7 Contd....... (c) Water and Electricity required for operation of AC plant shall be provided free of cost by the department. (d) Timings of shifts of 08 hrs each shall be decided by GE & this aspect shall be deemed to be included in the rates quoted by the bidders. (e) Contractor shall also be responsible for the discipline & integrity of staff deployed & shall be responsible for any lapse. (f) Plant shall be handed over in fully serviceable state after completion of contract. (g) Temperature & Relative Humidity of each AHU's shall be recorded in the log sheet on Hourly basis. (h) Comprehensive maint of all the items shall be done as per manufacturer's instruction/manual. (j) Sufficient consumables shall be kept at site by the contractor to avoid disruption of services. (k) Maintenance of bldgs is not under the scope of this item. (l) The defect liability of Phase-I is 36 Months. Hence the rates are deemed to be quoted for repairs within & beyond the period of defect liability accordingly.

Ditto all as per Sl Item No 7.00 here-in-before but for the period commencing from the next day after completion of Item No-7 above.

Ditto all as per Sl Item No 7.00 here-in-before but for the period commencing from the next day after completion of Item No-8 above.

Ditto all as per Sl Item No 7.00 here-in-before but for the period commencing from the next day after completion of Item No-9 above.

Ditto all as per Sl Item No 7.00 here-in-before but for the period commencing from the next day after completion of Item No-10 above.

Total of M&O

Intrernational Engineers

Parksons Engineering Company Pvt Ltd