CE CHZ CHM T 23 2025 26 ADDL ALTN AND REPAIRS OF CENTRAL AC PLANT AT COMD HOSP CHANDIMANDIR

HVAC WORK Contractor shall submit Design and Drawings of Central Air-Conditioning System suitable for 24 Hrs hospital operation complete comprising of heat load calculations, size of pipe, size of AC duct, AHU, LT Panel, control cable, LT switch gear etc and of all the items as catered under serial Item no 2 to 101 here -in-after, which shall be dully vetted by IIT/NIT by the contractor before the same is approved by the Accepting Officer. All the AHUs installed shall be either floor mounted or ceiling suspended as applicable. Contractor will be responsible for performance guarantee of complete AC plant. AHRI Certified selection sheet for both AHRI Conditions & below mentioned parameters shall be submitted by the contractor duly vetted by the OEM. Design Parameters shall be as under:- (a) Inside room Temperature - 21°C ± 3°C (b) Relative Humidity - 55% (±5%). (c) ACH not less than 25 - For OTs only & ACH not less than 12 for balance area (d) Minimum positive pressure to be maintained 2.5 Pascal. - For OTs only (k) Time required to achieve design condition after switching on plant shall not exceed 45 minutes. (l) Air conditioning zoning of complete area shall be as per corresponding zonal requirement as per design The design and drawings of central air-conditioning system should be energy-efficient and economically viable as per the site conditions and cooling/heating requirements as elaborated. The contractor shall consider the following while submitting the design. A. Preliminary survey and data collection: (i) Visit site and study architectural, structural and electrical drawings. (ii) Assess building usage, occupancy, internal loads and ambient conditions. (iii) Identify constraints for routing refrigerant pipes, drain pipes, fresh air ducts and electrical cables. B Heat Load Calculations:- (i) Perform room-wise and system-level heat load calculations as per ISHRAE/ASHRE/NABH/NBC/ECBC ( In case of overlapping parameters among various codes, superior parameter shall be adopted) (ii) Consider building envelope, solar load, internal loads, fresh air load. (iii) Provide cooling and heating load calculations for each zone. C. System Design & Equipment Selection (i) Design the entire central air-conditioning system with following components- (a) Chilled water system (b) Hot water generator (c) Plant automization and optimization controller (d) Cooling tower (e) Condenser water pump, Primary chilled water pump, secondary chilled water pump & Hot water pump (f) Air handling unit & FCU

D. Refrigerant piping & Drainage Design (i) Prepare complete refrigerant piping layout with pipes sizes, line lengths ,height difference etc (ii) Ensure compliance with manufacturer limits (iii) Prepare drain piping layout with slope gravity/pumped system, insulation details E. Fresh Air & Ventilation System Design (i) Calculate fresh air requirement as per ISHRAE/ASHRE/NABH/SOA Armed forces Hospital (2003)/NBC/ECBC . (ii) Design treated fresh Air Unit (TFA)/ERV/HRV as required. (iii) Provide duct routing, sizing, filtration specs and integration details with central air-conditioning system.F. Electrical System Design (i) Estimate connected load and operating load. (ii) Prepare SLDs, wiring diagrams for power & control cables. (iii) Specify breaker ratings, DB sizes, cable sizes and earthing requirement. G. Control System & BMS Integration (i) Recommend central controller architecture. (ii) Provide BMS integration protocol (Modbus/BACnet) (iii) prepare control diagrams and point lists. H. The contractor shall submit the following drawings & Documentation:- (i) Heat load summary (ii) Indoor-outdoor piping layout. (iii) Schematic diagrams. (iv) Fresh air duct layouts (v) Electrical SLD and control diagrams. (vi) Equipment layout drawings. (vii) Provide drawings in AutoCAD/Revit format. j. Standards & Codes : All design shall comply with the following: (i) ISHRAE Guidelines (ii) ASHRAE Standards (iii) National Buildings Code of India NBC 2016 (amended upto date). (iv) Relevant IS codes for electrical, insulation, refrigerant safety. (v) OEM-specific central air-conditioning system design guidelines. (vi) SOA Armed forces Hospital (2003) (vii)National electrical code 2023 (viii) Energy conservation building code (ECBC) 2017

(m) Refrigerant piping fittings, valves, level sensing electronic expansion valves and accessories to inter connect compressor, condenser, chiller and electronic expansion valve. (n) Microprocessor based control panel comprising of Controls including sensors, factory manufactured and tested. All Control function including start up and shut down leaving chilled water temperature Control, Compressor and Electronic Expansion Valve modulation, anti recycle logic automatic Compressor and load limiting. It shall also be equipped with the following protection and monitoring devices. (i) High (Condenser) & Low (Evaporator) pressure protection. (ii) Low oil level & pressure protection. (iii) Chilled/Condenser Water flow loss. (iv) Chiller Water Freeze protection. (v) Sensor error protection. (vi) Motor load control and overload. (vii) High motor temperature protection. (viii) High oil temperature protection. (ix) Chiller inlet and outlet Water temperature. (x) Condenser inlet / Outlet water temperature. (xi) Suction and discharge Compressor pressure. (x) Microprocessor based control panel shall have suitable hardware & software as per OEM so that it can be integrated directly with standard communication open protocol using backnet / Modbus as well as open IP. (xi) DP switches at inlet and outlet of condenser & chiller, water drain & air purge valves, cable termination box, as required. (xii) suction line and chiller insulation with minimum 19 mm thick polyvinyl nitrile rubber insulation. (xiii) frame work for mounting the above condenser, chiller, compressor and motor with base plate complete with antivibration pads/ springs as per OEM design. (xiv) Initial/ first charge of refrigerant gas & compressor oil duly charged at factory. (xv) RCC/Cement concrete foundation for equipment as per OEM design.

Hot Water Generator For Winter Heating Supply, installation, testing and commissioning of electrically operated Hot Water Generator Capacity : 350 KW (For Winter Heating) of efficiency more than 90% of given capacity in multiple bank, Water temp inlet 113F & outlet temp. out at 122 F with required flow rate complete with PLC based microprocessor controls, electrical panels, stainless steel braided pipe flexible connector etc. The pressure Vessel shall be constructed as per ASME (American society of mechanical engineering) standards and insulated on all sides with 2 layers of 50 mm thick fiber glass of density 32 kg/cum & K value as per ECSBC (Energy conservation & sustainable building code) standards with 0.32 mm thick Aluminum cladding as per OEM. The hot water generator shall be equipped with all automatic and safety controls such as manual reset, high temperature water outlet, microprocessor based step controller with thermistor sensor to control HWG in stages and recycling relay, on/off switch type thermostat, pilot light, low water cut off and other controls as per manufacturers recommendations. All basic controls and terminals shall be located in an integral control cabinet factory wired and tested. The hot water generator shall be suitable for 415±10%volts/50 cycles per second, 3 phase power supply. The entire hot water generator shall be factory assembled and tested. It shall be BMS compatible with RS-485 communication port. Cost for suitable PCC/RCC foundation ( PCC foundation in PCC (1:2:4) type B-1 using 20 mm graded stone aggregate 30 cm above floor level including making connection of inlet & outlet with fittings including nut,bolts,packing etc. with plaster, Anti vibration arrangement of cushy foot mountings is deemed to be included in overall quoted rates.

Plant Manager The integrated plant automation and optimization controller shall be designed for a water cooled chiller plant. The controller shall be specifically designed to control 5 water cooled chillers, 3 hot water generator, 3 hot water condenser pumps, 5 cooling towers fans, variable speed drives, 5 cooling tower isolation valves, 5 condenser pumps, up to 5 variable speed distribution pumps, up to 5 chiller isolation valves, 1 system by-pass valve to maintain minimum flow and up to 5 zone demand sensors (which can either be differential pressure or temperature sensors). The controller shall include a 10.4 inch backlit touch screen, with a lockable IP-54 cabinet. The water-cooled chiller plant control system shall include: a. An internal circuit breaker b. A back-lit touchscreen color display operator interface of at least 10” and show active-element schematic displays with links to sub- menus for status reports, data and setup menu options. Keypad based interfaces, LCD readouts, and LED displays will not be accepted. No data shall be lost during power supply interruptions. The plant control system shall be self-prompting. All messages shall be displayed in plain English with the options of alternate languages. The operator interface shall have on-screen help functions, storage memory of at least 500 faults and be able to recall them on the screen. The quantity of chillers, pumps, valves and demand sensors to be controlled shall be independently configurable on-site at the graphic user interface by selection from pull down menus, without requiring reprogramming or software download. The plant control system shall be supplied with all the hardware, software and programming required to be seamlessly integrated with the reporting and remote read-write capabilities of the building management system (BMS). The plant control system shall allow field adjustments of control parameters as described. Plant controller shall come with Remote plant diagnostics & health monitoring system.

The integrated plant automation and optimization controller shall essentially be able to perform the following functions :a. Manual or automatic control system b. Schedule start/stop c. Duty cycling d. Automatic lock-out of malfunctioning equipment e. Backup sequences of control for any sensor failure f. Automatic temperature control g. Primary pumps control to satisfy zones demand h. Control sequences for dedicated and for headered pumps i. Control sequences for dual dedicated pumps with options for duty/duty, duty/standby and lead/lag operation j. Optimized sequencing of the Chilled Water pumps k.Control sequences for parallel sensorless and zone sensors distribution pump speed control options. l. Maintain minimum flow through the Chiller m. Constant flow Condenser pumps n. Zone setpoints reset based on most open load valve o. Optimized and independent sequencing of chillers based on cooling demand p. Sequencing of chillers override to prevent exceeding their kW rating and FLA q. Supply temperature setpoint reset r. Load shedding / Demand limit s. Scanning and alarm processing t. Graphic screen reporting u. Trend Logging Complete in all respect for above mention equipment Temperature Sensors, Flow sensor/ Flow meter, Outside Air Temperature Sensor ,Differential Pressure Sensors ,Control Cabling etc complete for fully functional.

COOLING TOWERS WITH VFD Supplying, installing, testing and commissioning of CTI (Cooling technology institute) /JCI (Japan cooling tower institute) Induced draft FRP Cooling tower with IP55 VFD for fans with mentioned below heat rejection capacity with FRP Water basin, multiple cell, PVC filling with integral louvers and drift eliminators complete with hot water basin either fitted with spray nozzles or having self rotating sprinklers, statically and dynamically balanced axial flow type fan-direct driven or driven through reduction gear box with TEFC induction motor VFD controlled, efficiency class IE4 efficient, the cooling tower shall be compatible with suction screen, make-up, quick fill arrangement, overflow and drain connections with necessary valves, suitable inspection ladder, access arrangement for cooling tower interior, masonary supporting structure, anti-vibration mountings etc. complete as per OEM specifications and as required. The scope of work shall include lifting, shifting & positioning of cooling tower and MGS girders for transfer the load of cooling tower to the column. Cooling tower shall be as per minimum technical specification mentioned below- Summer - 110 ⁰F Dry bulb, 75 ⁰ F Wet bulb Monsoon - 95.1 ⁰F Dry bulb, 80.1 ⁰F Wet bulb Inlet temperature of Condenser - 90 ⁰ F Outlet temperature of Condenser - 97.5 ⁰ F FLOW-900GPM Heat rejection -300 TR/ 900000 kcal/hr Note :- The cooling tower shall be compatible as per international norms and prevailing weather conditions at Chandimandir cantonment (WC) and plant total capacity.

Condenser Water Pumps Set Supply of Vertical inline long coupled pump with Integrated VFD mounted on a common base with electric motor for re-circulation of water for the central air conditioning system. The pumps shall be long coupled with CI casing, SS (304)/ Lead free cast bronze impeller, high strength steel shaft (SS 416) . All external and exposed cast iron parts of pumps shall have an epoxy-based coating made in a cathodic electro-deposition (CED) process. The pump shall be PN 16 rated and shall be with outside type mechanical seal. The pump motor shall be suitable for 415±10% volts,50 cycles,3 phase AC power supply of minimum IE4 efficiency class. Motor shall be TEFC squirrel cage, Class F insulation,minimum 1500RPM. Pump, base, coupling, OSHA (Occupational safety and health administration) compliant coupling Guard and motor shall be factory assembled , adjustable & complete in all resepct as specified and directed. The capacity of motor shall be at least 10% in excess of BHP requirement of pump. Pump foundation, suitable support/mounting arrangement including making connection of inlet & outlet with fittings including nut, bolts, packing etc. with PCC work as per OEM design is deemed to be included in quotted rates. The pump shall be provided with motor mounted and factory integrated IP-55 VFD. The pump VFD shall display all critical parameters like amps, volts, frequency, dynamic flow and head of each operating pump. Suction guide is to be provided by pump manufacturer for each unit. Pumps shall be BMS compatible. Pump rating shall be PN 16. The pump(s) duty flow to BEP flow ratio shall lie between 80% - 110%. Motor shall be selected as non-over -loading type. The pumps shall be factory manufactured, assembled and hydrostatically tested in an ISO 9001:2015 approved facility as per ISO 9906:2012. Pump and motor shall be factory aligned, and shall be realigned if required by the contractor as per factory recommendations after installation. Pump shall comply to ASHRAE 90.1. The internal components of pumps including mechanical seal shall be suitable to sustain a temperature of 122 degree Fahrenheit. Pump shall be as per minimum technical specification mentioned below . Water flow rate : 900 USGPM Head : 28 m Efficiency (Min) : 75 % or nearest as per OEM recommendation

Primary Chilled Water Pumps Set Supply,installation , testing and commissioning of Vertical inline long coupled pump with Integrated VFD mounted on a common base with electric motor for re-circulation of water for the central air conditioning system. The pumps shall be Long coupled with CI casing, SS (304)/ Lead free cast bronze impeller, high strength steel shaft (SS 416) . All external and exposed cast iron parts of pumps shall have an epoxy-based coating made in a cathodic electro-deposition (CED) process. The pump shall be PN 16 rated and shall be with outside type mechanical seal. The pump motor shall be suitable for 415±10% volts,50 cps,3 phase AC power supply of minimum IE4 efficiency class. Motor shall be TEFC (Totally enclosed fan cooled) squirrel cage, Class F insulation, minimum 1500 RPM Pump, base, coupling, OSHA compliance coupling Guard and motor shall be factory assembled adjustable & complete all as specified and directed. The capacity of motor shall be at least 10% in excess of BHP requirement of pump. The cost for pump foundation, suitable support/mounting arrangement including making connection of inlet & outlet with fittings including nut, bolts, packing etc. with plaster work deemed to be included in overall cost, Antivibration arrangement of cushy foot mountings are deemed to be included in this item cost.The pump shall be provided with motor mounted and factory integrated IP55 VFD. The pump VFD shall display all critcal parameters like amps, volts, frequency, dynamic flow and head of each operating pump. Suction guide to be provided by pump manufacturer for each unit. Pumps shall be BMS compatible. Pump rating shall be PN 16.

The pump(s) duty flow to BEP Flow ratio shall be between 80% - 110%. Motor shall be selected as non-over-loading type. The pumps shall be factory manufactured, assembled and hydrostatically tested in an ISO 9001:2015 approved facility as per ISO 9906:2012. Pump and motor shall be factory aligned, and shall be realigned if required by the contractor as per factory recommendations after installation. Pump shall comply to ASHRAE 90.1 The internal components of pumps including mechanical seal shall be suitable to sustain a temperature of 122 degree Fahrenheit. Minimum efficiency of pump shall be as per minimum tech specification mentioned below. Water flow rate : 540 USGPM (HOSPITAL) Head : 14m Efficiency(Min) : 75 % or nearest as per OEM