Aquatechplus Pvt. Ltd.

Kuvadva Road, Rajkot, Gujarat

2. CONDENSER DETAILS (WATER COOLED SHELL & TUBE)

TECHNICAL SPECIFICATION

20 TR AIR COOLED SCROLL TYPE WATER CHILLER

Sr. No.ParameterRevised Similar / Equivalent Description

1Equipment ModelFMACS-20TR-407

2Cooling Output Capacity20 TR (Tons of Refrigeration)

3Refrigeration System ArrangementSingle, Self-Contained Refrigeration Circuit

4Power Supply Characteristics400 V 10%, 50 Cycles, Three Phase AC

5Total Electrical Load13.32 kW / 24.9 A

6Specified RefrigerantR-407C (Eco-Compatible Refrigerant)

7Refrigerant Metering DeviceThermostatic Type Expansion Valve (TXV)

8Design Evaporating Temperature (SST)+5 C

9Design Condensing Temperature (SDT)+35 C

10Maximum Design Ambient Temperature45 C

11Chilled Water Operating Temperature Range+7 C to +10 C

12Design Chilled Water Flow Requirement12, 000 LPH at T = 5 C

13Compressor DesignFully Hermetic Scroll Compressor

14Installed Compressor QuantityOne (1) No.

15Compressor Motor Power Rating12 kW / 23 A

16Compressor Starting TechniqueDirect-On-Line (DOL) Starting Method

17Cooling Capacity RegulationStep-Type Capacity Control 0%, 50%, 100%

18Evaporator ConfigurationShell & Tube Type Chilled Water Heat Exchanger

19Evaporator Water Connection3 Inch Flanged Inlet / Outlet

20Evaporator Shell Material of ConstructionCarbon Steel with Anti-Corrosive Powder Coating

21Evaporator Tube MaterialInternally Enhanced / Grooved Copper Tubes

22Condenser ConfigurationShell & Tube Type Condenser

23Condenser Construction MaterialCopper Tubes with Carbon Steel Outer Shell

24Chilled Water Pump DetailsStainless Steel (SS-304) Pump with 1.5 HP Motor

25Standard Safety & Protection FeaturesBuilt-in Compressor Thermal Protection, Electrical Overload Safety, High & Low Pressure Safety Cut-outs, Phase Sequence & Phase Failure Protection, Discharge Gas Temperature Safety Switch, Chilled Water Flow Interlock, Anti-Freeze Protection Logic

26Electrical Control & Protection PanelMicroprocessor-Based Control System with Protection Relays, Power Contactors, MCBs, Phase Preventer Relay and Time Delay Controls

27Overall Dimensions (L W H)To be furnished after order confirmation

28Estimated Operating WeightShall be provided at finalization stage

EXTRA SIMILOR WORD

The FM2-275X57XH air-cooled chiller is developed to provide a nominal cooling capacity of 274.0 TR (approximately 962 kW) and is built with two independent refrigeration circuits, ensuring reliable, continuous, and stable operation under varying load conditions. The unit is suitable for operation on a three-phase, 415 V, 50 Hz electrical supply, with a total connected electrical load of 304.0 kW and a full-load current of approximately 490 A. The refrigeration system utilizes R134a refrigerant, with accurate refrigerant flow and capacity regulation achieved through an expansion valve operating in a flooded system arrangement, resulting in smooth system operation and enhanced energy efficiency. The chiller is designed to operate at an evaporating saturated suction temperature (SST) of +5.6 C, corresponding to a leaving chilled water temperature (LWT) of 6.07 C. The heat rejection system is rated for a condensing temperature of +45 C SDT under a maximum ambient temperature of +46 C. The unit supports a chilled water operating temperature range of 5 C to 20 C, with a chilled water flow requirement of 415.3 L/s (approximately 1495 m/h), corresponding to an effective temperature difference of approximately 5.6 C. The system is fitted with a flooded shell-and-tube evaporator, designed to deliver efficient heat transfer and consistent thermal performance. The evaporator shell is constructed from powder-coated carbon steel, while the heat exchange tubes are made of copper, supported by carbon steel baffles and headers. The evaporator is designed for a water-side design pressure of 15.0 kg/cm and is hydrostatically tested at approximately 22 bar. Chilled water connections are provided via DN150 (approximately 6 NB) flanged nozzles, suitable for the specified flow conditions. To minimize heat gain and prevent surface condensation, the evaporator is insulated with 40 mm thick PUF insulation. The refrigeration package includes two semi-hermetic flooded screw compressors, equipped with a star-delta starting arrangement to reduce starting current and mechanical stress during startup. Cooling capacity modulation is achieved through step or slide valve control, enabling efficient operation during partial-load conditions and improved IPLV performance. The total installed compressor power is 264 kW, ensuring dependable and robust cooling performance across a wide range of operating conditions. Heat rejection is achieved through an air-cooled condenser comprising copper tubes with aluminum fins, mounted on a galvanized steel structural frame for enhanced durability and corrosion resistance. The condenser is designed for a total airflow capacity of 394, 168 CMH, generated by 16 axial-type, low-noise fans, each having a 910 mm diameter, in line with standard design practices for a 275 TR capacity unit. The total installed fan power is 40.0 kW, with each fan driven by a 2.5 kW motor, ensuring effective heat dissipation even under high ambient conditions. The chiller is supplied without an integral chilled water pump, and therefore external pumps are to be provided by the client, with pump head and selection to be finalized based on site-specific requirements. The unit is equipped with comprehensive safety and protection systems, including compressor over-temperature protection, high- and low-pressure safety switches, over-current and over-temperature protection, flow switch, phase sequence and phase failure protection, and oil safety devices, ensuring safe and reliable system operation. The electrical control system is housed in a factory-assembled and pre-wired electrical control panel, incorporating a PLC and HMI for monitoring and control, along with MCCBs, contactors, overload relays, timers, and auxiliary relays, enabling user-friendly operation, system protection, and advanced fault diagnostics. The overall dimensions of the chiller are 9610 mm (Length) 2825 mm (Width) 2547 mm (Height), with an approximate running weight of 9860

FMACSC-85TR-R407C; air-cooled water chiller; rated duty 85 TR (302 kW); refrigeration architecture single closed circuit. Power provision 400 V three-phase 50 Hz; electrical demand 73.0 kW; full-load current 122 A. Refrigerant charge R407C; metering via TXV; thermal design points 7C evaporation / 40C condensation; maximum ambient allowance 48C. Chilled water operating envelope +7C to +20C.

System water throughput 50, 000 LPH at T 5C. Heat dissipation module air-cooled condenser bank, copper tube and aluminum fin matrix; airflow induced by four axial suction fans, 630 mm diameter. Fan drive rating 1.5 kW per unit; cumulative airflow 70, 000 CFM; mounting base galvanized steel framework.

Compression achieved through single semi-hermetic screw compressor supplied by Bitzer; shaft power 67.0 kW; operating current 102 A at 50 Hz. Starting protocol stardelta; capacity adjustment incremental unloading 0100%.

Evaporative heat exchange via shell-and-tube assembly; pressure shell powder-coated carbon steel; heat transfer medium inner-grooved copper tubing; flow management components SS-304 TIG-welded headers and baffles. Design pressure 10 bar; hydrostatic verification 15 bar; hydraulic interfaces 3-inch BSP. Insulation layer 40 mm closed-cell PUF.

Hydronic circulation provided by two SS-304 centrifugal pumps, 5.5 kW each, deployment one duty + one standby. Condenser refrigerant line dimension 3/8 inch. Protective logic encompasses high/low pressure cut-outs, motor thermal overload, phase sequence supervision, flow confirmation, freeze prevention algorithm, discharge temperature limiter, internal thermostat, and low water level interlock.

The FIDEM water-cooled glycol screw chiller, designated as model FM-GWCS-170-407C, is engineered to deliver a rated refrigeration capacity of 170 TR (approximately 599 kW) and operates on R407C refrigerant, ensuring efficient, stable, and uniform heat transfer performance. The unit is configured with two fully independent refrigeration circuits, providing high operational dependability, built-in redundancy, and consistent cooling output across a wide range of load conditions. The chiller is designed for connection to a three-phase, 415 V, 50 Hz electrical supply, with an estimated connected power demand of 140 kW and a full-load current of approximately 230 A. Accurate refrigerant flow management and capacity regulation are achieved through an electronic expansion valve, enabling rapid response to load variations and improved efficiency during part-load operation.

The system incorporates a shell-and-tube evaporator purpose-built for chilled glycol service and operates at a saturated suction temperature (SST) of +5 C. The evaporator is designed to accommodate a glycol temperature range from 0 C at inlet to 15 C at outlet, delivering a glycol circulation rate of 100, 000 LPH, corresponding to an effective temperature differential of approximately 5 C. The evaporator assembly consists of two circuits and provides a net cooling output of approximately 600 kW. The evaporator shell is fabricated from 10 mm thick seamless carbon steel, while heat exchange is achieved through internally grooved copper tubes arranged in a U-bundle configuration to enhance thermal performance. The evaporator is provided with DN150 flanged connections and is designed for a maximum water-side pressure drop of 0.4 bar, a water-side design pressure of 10 bar, and a refrigerant-side design pressure of 25 bar.

Reliable circulation of chilled glycol is ensured by a centrifugal monoblock pump supplied as part of the chiller package. The pump is rated for a flow capacity of 90, 000 LPH at a total developed head of 15 meters and is driven by a 7 kW electric motor, ensuring continuous and dependable glycol circulation through the evaporator and the associated process piping network.

The water-cooled condenser, also of shell-and-tube construction, is designed to operate at a saturated discharge temperature (SDT) of +35 C. The condenser is capable of rejecting a total thermal load of 720 kW and features a carbon steel shell with epoxy coating to enhance corrosion resistance and extend service life. The condenser heat transfer surface comprises plain copper tubes assembled in a removable bundle, allowing convenient access for inspection and routine maintenance. The condenser is designed for a cooling water flow rate of 100, 000 LPH, fitted with DN200 flanged inlet and outlet connections, and maintains a water-side pressure drop not exceeding 0.4 bar. The design pressure ratings are 10 bar on the water side and 30 bar on the refrigerant side.

Cooling water circulation through the condenser is provided by a centrifugal monoblock pump rated for 100, 000 LPH at a head of 10 meters. The pump is driven by a 7.5 kW motor, suitable for operation on a 380415 V, 50 Hz electrical supply, ensuring stable and efficient condenser water circulation.

The refrigeration system incorporates compact screw compressors designed for continuous-duty operation, heavy-load service, and long-term reliability. Compressor capacity regulation is achieved through step modulation, with unloading stages of 25%, 50%, 75%, and 100%, enabling efficient system operation under partial-load conditions. Compressor starting is accomplished using a star-delta starting arrangement. The compressor package delivers a rated cooling capacity of 599 kW, with a power input of approximately 121 kW, operating at a full-load current of around 201 A at 400 V, and is suitable for a voltage operating range of 380415 V.

30 TR AIR COOLED SCROLL TYPE GLYCOL / WATER CHILLER

Technical Specification (Terminal Version No Residual Redundancy)

The FMACSC-80TR-R407C air-cooled chiller delivers 80 TR (280 kW) through a single refrigeration circuit. Electrical input is 400 V, 3-phase, 50 Hz, with a 70.25 kW connected load and 114.8 A rated current. The refrigeration cycle employs R407C, regulated by a thermostatic expansion valve, operating at 7C evaporation and 50C condensation, suitable for ambient temperatures up to 45C. Chilled water temperature range is +10C to +20C.

Chilled water flow is 6000 LPH at T 35C. Heat rejection is carried out by an air-cooled condenser with copper tubes and aluminum fins, assisted by four 28-inch axial suction fans. Each fan consumes 0.65 kW, generating a combined airflow of 30, 720 CFM, mounted on a galvanized steel frame.

Compression is provided by one semi-hermetic screw compressor from Bitzer, rated at 63.9 kW and 105.4 A at 50 Hz. Starting is stardelta, with step capacity modulation from 0% to 100% ensuring stable part-load operation.

Heat transfer occurs in a shell-and-tube evaporator incorporating a powder-coated carbon steel shell, inner-grooved copper tubes, and SS-304 TIG-welded baffles and headers. Design pressure is 10 bar, hydrostatic test pressure 15 bar, with 3-inch BSP chilled water connections. Thermal insulation is 40 mm closed-cell PUF.

A factory-integrated circulation pump rated at 3.75 kW (5 HP) supplies 50, 000 LPH at 2.33 kg/cm head. Condenser-side refrigerant piping is 3/8 inch. Safety provisions include HP/LP protection, motor overload, phase reversal, flow interlock, anti-freeze logic, discharge temperature cut-out, internal thermostat, and low water level safety.

Control and monitoring are provided through a factory-assembled electrical panel housing MCBs, contactors, overload relays, timers, PLC, and HMI, fully wired and tested. Overall dimensions and GA drawings shall be submitted after order confirmation.

Differential pressure protection across evaporator
Low-flow alarm & auto shutdown logic
Manual air vent on evaporator
Note: Prevents damage due to air locking or insufficient water circulation.

Anti-short cycling timer
Minimum ON / OFF time delay
Automatic restart with fault memory
Note: Extends compressor life and improves system reliability.

Pressure-based fan cycling (standard)
Multi-step fan control for stable condensing temperature
EC fans optional for energy-efficient operation
Note: Improves performance during fluctuating ambient conditions.

Evaporator fouling factor: 0.00010.0002 hrftF/Btu
Approach temperature: 23 C (typical)
Note: Lower approach temperature results in better system efficiency.

Powder-coated CRCA sheet steel enclosure
IP 54 protection class
Internal wiring with ferrules & cable markers
Note: Suitable for industrial indoor/outdoor installations.

Digital water inlet & outlet temperature display
Suction & discharge pressure indication
Alarm indication with fault code display
Note: Enables easy troubleshooting and monitoring.

Low Global Warming Potential (GWP) refrigerant options available
RoHS-compliant electrical components
Designed for reduced carbon footprint
Note: Suitable for green and energy-conscious projects.

Maximum altitude: up to 1000 m above MSL (standard)
Deration applicable above 1000 m altitude
Suitable for tropical climatic conditions
Note: Altitude and humidity affect cooling capacity.

Performance run test at factory
Electrical insulation & continuity test
Refrigerant leak testing using nitrogen
Note: Ensures trouble-free commissioning at site.

Easily accessible service points
Standard make components for easy availability
Nationwide service support (optional)
Note: Reduces downtime and maintenance cost.

Compressor life expectancy: 812 years
Heat exchanger life: 1215 years (with proper water quality)
Note: Life depends on operating conditions and maintenance.

Installation, Operation & Maintenance (IOM) manual
Electrical wiring diagram
GA drawing (on request)
Test & inspection certificate

Continuous power supply
Treated chilled water supply
Drain point near unit location
Adequate ventilation / exhaust airflow

Low-temperature brine chilling (with glycol)
Continuous 247 operation design
High ambient duty version (50 C)
Redundant pump / control philosophy (optional)

The FIDEM water-cooled screw chiller, model FM-WCS-200-407C, has been specifically developed to deliver a rated cooling capacity of 200 TR (approximately 703 kW) and operates on R407C refrigerant to ensure efficient and dependable heat transfer. The unit incorporates two completely independent refrigeration circuits, offering enhanced system reliability, operational redundancy, and stable performance under varying load conditions. It is designed for connection to a three-phase, 415 V, 50 Hz power supply, with an estimated total connected electrical load of about 150 kW and a full-load current of approximately 243 A. Refrigerant flow and capacity adjustment are precisely managed through an electronic expansion valve, enabling fast system response and improved efficiency during part-load operation.

The chiller is equipped with a shell-and-tube evaporator engineered for chilled water duty and operates at a saturated suction temperature (SST) of +10 C. The evaporator is suitable for a chilled water temperature range of 15 C at inlet and 20 C at outlet, delivering a chilled water flow rate of 26, 500 LPH, which corresponds to an effective temperature differential of around 23 C. The evaporator assembly consists of two circuits and provides a net cooling output of 703 kW. The shell is constructed from 10 mm thick seamless carbon steel, while heat transfer is achieved through internally grooved copper tubes arranged in a U-bundle configuration for enhanced thermal performance. The evaporator is provided with 6-inch flanged water connections and is designed for a maximum water-side pressure drop of 0.4 bar, a water-side design pressure of 10 bar, and a refrigerant-side design pressure of 25 bar.

Chilled water circulation is facilitated by a centrifugal monoblock pump supplied as part of the chiller package. The pump is rated for a flow capacity of 120, 000 LPH at a total head of 16.3 meters and is driven by an 11 kW electric motor, ensuring consistent and reliable chilled water flow through the evaporator and associated HVAC or process piping network.

The water-cooled condenser, also of shell-and-tube construction, is designed to operate at a saturated discharge temperature (SDT) of +35 C. The condenser is capable of rejecting a total heat load of 718 kW and features a carbon steel shell with epoxy coating to improve corrosion resistance and extend service life. The condenser heat exchange surface consists of plain copper tubes arranged in a removable bundle, allowing easy cleaning and routine maintenance. The condenser is designed for a cooling water flow rate of 140, 000 LPH, equipped with 6-inch flanged inlet and outlet connections, and maintains a water-side pressure drop not exceeding 0.4 bar. Design pressure ratings are 10 bar on the water side and 30 bar on the refrigerant side.

Cooling water circulation through the condenser is ensured by a centrifugal monoblock pump rated for 140, 000 LPH at a head of 15.7 meters. The pump is fitted with an 11 kW motor, suitable for operation on a 380415 V, 50 Hz electrical supply, ensuring stable and efficient condenser water flow.

The refrigeration system is equipped with compact screw compressors designed for continuous operation, heavy-duty performance, and long operational life. Compressor capacity is controlled through step or stepless modulation, with unloading stages of 25%, 50%, 75%, and 100%, allowing the system to operate efficiently during partial-load conditions. Compressor starting is achieved using a star-delta starting arrangement, while VFD operation is available as an optional feature for improved energy efficiency and smoother capacity control. The compressor package is capable of delivering a maximum cooling capacity of 718 kW, with actual power consumption dependent on operating conditions and site-specific requirements.

FIDEM WATER COOLED SCREW TYPE CHILLER (150 TR)

The supplied equipment consists of a FIDEM-manufactured water-cooled screw type chiller, identified by model FM-WCS-150-407C, and designed to deliver a nominal refrigeration capacity of 150 TR, equivalent to approximately 527 kW of useful cooling output. The chiller unit is arranged with two (2) completely independent refrigerant circuits, ensuring reliable operation, redundancy during part-load conditions, and even distribution of compressor loading. The unit is suitable for operation on a three-phase, 415 V, 50 Hz AC electrical supply, with a maximum connected power demand of 112.1 kW and a full-load operating current of 204.8 amperes. The refrigeration system utilizes R-407C refrigerant, and precise regulation of refrigerant flow is achieved by means of an Electronic Expansion Valve (EEV), ensuring stable, efficient, and responsive system performance under all operating conditions.

The chiller is equipped with a water-cooled shell and tube type evaporator, engineered for an evaporating saturation temperature (SST) of 10 C. The system is intended for applications requiring a chilled water operating temperature range of 15 C to 20 C. The evaporator assembly incorporates two (2) refrigerant circuits and is designed to handle a chilled water flow rate of 19, 700 LPH, corresponding to a temperature differential of approximately 23 C, thereby providing a net cooling capacity of 527 kW.

The evaporator shell is constructed from carbon steel with a minimum wall thickness of 10 mm using seamless fabrication, ensuring high mechanical strength and extended service life. Heat transfer is achieved through internally grooved copper tubes arranged in a U-bundle configuration, which enhances overall thermal efficiency. The evaporator is provided with 6-inch water inlet and outlet connections and is designed for a water-side pressure loss of 0.4 bar. The maximum allowable working pressure on the water side is 10 bar, while the refrigerant-side design pressure is rated at 25 bar.

Chilled water circulation through the evaporator is ensured by a centrifugal mono-block pump, rated for 90, 000 LPH at a total dynamic head of 15 meters, driven by a 5.5 kW electric motor.

The condenser is a water-cooled shell and tube type heat exchanger, designed to operate at a condensing saturation temperature (SDT) of +35 C. The condenser is capable of rejecting a total heat load of 718 kW. The shell is fabricated from carbon steel and finished with an epoxy protective coating to provide enhanced corrosion resistance, while the heat transfer surface consists of plain copper tubes assembled in a tube bundle configuration.

The condenser is provided with 6-inch cooling water inlet and outlet connections and is designed for a cooling water flow requirement of 140, 000 LPH. The water-side pressure drop is limited to 0.4 bar, with a water-side design pressure of 10 bar. The refrigerant-side design pressure is rated at 30 bar.

Cooling water circulation for the condenser is provided by a centrifugal mono-block pump, rated for 110, 000 LPH at a head of 10 meters, driven by a 5.5 kW motor suitable for operation on 380415 V, 50 Hz power supply.

The chiller is fitted with a compact screw type compressor, designed to deliver a cooling output of approximately 550 kW. The compressor is suitable for continuous full-load operation (100%) and supports step or stepless capacity regulation at 25%, 50%, 75%, and 100%, allowing efficient matching of system capacity with varying cooling demand. The compressor is provided with a star-delta starting arrangement, with Variable Frequency Drive (VFD) operation available as an optional provision. The compressor electrical power input shall be as per system design and actual operating conditions.