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Bulletin No. H-IM-AGC
Installation and Operation Guide
Table of Contents
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
System Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Unit Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Sound Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Walls or Obstructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Rigging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Typical Arrangements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Installation, Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Recommended Refrigerant Manifold Connections . . . . . . .6
Discharge Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Gas Cooler Line Size Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Motors with Integrated Variable Speed . . . . . . . . . . . . . . . . . .8
Adiabatic Gas Coolers
Adiabatic Gas Cooler
Installation & Operation
June 2025
Speed Adjustment Characteristics . . . . . . . . . . . . . . . . . . . . . . .8
External Control Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Water Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Adiabatic Gas Cooler Start Up . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
General Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
In-Warranty Return Material Procedure . . . . . . . . . . . . . . . . 18
InterLink Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-34
Installation Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Part Number 25093701
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Summary of Contents for Heatcraft 25093701
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Page 1: Table Of Contents
Adiabatic Gas Cooler Installation & Operation Bulletin No. H-IM-AGC June 2025 Part Number 25093701 Adiabatic Gas Coolers Installation and Operation Guide Table of Contents Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Speed Adjustment Characteristics . -
Page 2: Inspection
There may be more than one source of electrical Sharp edges and coil surfaces are a potential injury current in this unit. Do not service before disconnecting hazard. Avoid contact with them. all power supplies. © 2025 Heatcraft Refrigeration Products LLC... -
Page 3: Walls Or Obstructions
Walls or Obstructions The unit should be located so that air may circulate freely and not be recirculated . For proper air flow and access all sides of the unit should be a minimum of “W” away from any wall or obstruction . -
Page 4: Rigging Instructions
Rigging Instructions 1) . Use spreader bar for all rigging . 2) . Do not use coil connections, coil headers, return bends, or electrical box to lift or move the gas cooler . 3) . Do not walk or stand under gas cooler during lifting . 4) . -
Page 5: Typical Arrangements
Typical Arrangements Installation, Refrigerant Piping Figure 2 illustrates a typical piping arrangement involving a Install piping according to standard accepted refrigeration remote gas cooler located at a higher elevation, as commonly practice . The following recommendations should be adhered to: encountered when the gas cooler is on a roof and the compressor and receiver are on grade level or in a basement equipment Use only refrigeration grade CO... -
Page 6: Recommended Refrigerant Manifold Connections
Recommended Refrigerant Manifold Connections REFRIGERANT OUT SPACE REQUIRED FOR ACCESS DOOR REFRIGERANT IN ACCESS DOOR It is recommended that coil manifold connections are piped in parallel and maintain sufficient space to allow access to the service access door . -
Page 7: Discharge Lines
Discharge Lines The discharge line should be properly sized for the desired 1 . To minimize refrigerant pressure drop, since high pressure pressure drop at full load conditions and an oil separator losses cause increased compressor horsepower per ton of installed at the bottom of the trap in the discharge line from the refrigerant . -
Page 8: Motors With Integrated Variable Speed
Motors with Integrated Variable Speed Gas Coolers use an EC motor/fan blade combination to provide variable speed gas cooler control . All components required to run the motor at variable speeds are built into the motor . High voltage may remain in motor after Fan motors may start while power is applied to disconnecting power. -
Page 9: Water Connections
Water Connections WATER CONNECTIONS R-404A/R-507A Heat of Compression Factor Connection Type Connection Size / Material Please consult AWEF table on page 15 to confirm model meets DOE minimum AWEF Connections Connection Size Water in Line Ø3/4" NPS, 316 SS Water In Line Ø3/4"... -
Page 10: Adiabatic Gas Cooler Startup
ADIABATIC GAS COOLER STARTUP o Press Enter to adjust the date or time 1 . VERIFY UNIT IS INSTALLED PER THIS MANUAL AND ALL • Use up and down buttons to adjust values then APPLICABLE CODES press enter to move to the next digit •... - Page 11 o Verify values are present and within expected range for all sensors . 6 . VERIFY FAN OPERATION • Close all water system valves . • Turn the unit On o On the Home screen, press Up or Down button until the •...
- Page 12 • Press Enter • The Fan Speed will now modulate based on the temperature • Press Up or Down to toggle the override On inputs . The actual fan speeds may lag the displayed speed by a few seconds . •...
- Page 13 • When the mode switches to ADIABATIC, the drain valve will close, and the makeup solenoid valve will open and begin • The Drain valve will open . filling the sump . o As the water level drops, the Makeup valve will turn •...
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Page 14: Operation
Operation Clean Mode The Adiabatic Gas Cooler is capable of several modes of operation depending on the selected application and the Clean Mode operates the fans in reverse direction to clear debris environmental conditions . from the coils and pads . Clean mode is started automatically after “ADIABATIC LOCK-OUT”... -
Page 15: Parameters
Table 2. Parameters ADJUSTABLE MIN ACCESS RANGE DEFAULT DESCRIPTION PARAMETERS Gas Cooler Sets whether fans are controlled locally or by rack control . FAN MODE SERVC Gas Cooler Condenser Gas Cooler= Rack Control . Condenser= Local control . Sets time start period where unit is forced into dry mode ADIABATIC LOCKOUT START SERVC 0000 - 2359... -
Page 16: General Cleaning Instructions
General Cleaning Instructions Calgon Corporation's CalClean 41352 (or equal) should be acceptable Heatcraft recommends that the finned surface of this unit be for cleaning this unit . CalClean should be applied liberally to entering cleaned approximately every six months; more frequent cleaning... - Page 17 I. Cooling Pad Cleaning: II. Water Header Cleaning and Extensive Cleaning Flush The Cooling pads are designed for quick, tool-free removal, This system utilizes a corrosion-resistant polyvinyl chloride (PVC) allowing easy access to the unit’s coils and sump for cleaning and spray distribution method to ensure efficient water distribution .
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Page 18: In-Warranty Return Material Procedure
Heatcraft Refrigeration Products in Stone Mountain, of failure, along with an explanation of the malfunctions and a Georgia . -
Page 19: Wiring Diagrams
Diagram 1. 1-Fan Gas Cooler Wiring Diagram (230V)Gas Cooler Wiring Diagram with ESignal... - Page 20 Diagram 2. 1-Fan Gas Cooler Wiring Diagram (460V)y Typical...
- Page 21 Diagram 3. 2-Fan Gas Cooler Wiring Diagram (230V)Signal...
- Page 22 Diagram 4. 2-Fan Gas Cooler Wiring Diagram (460V) Gas Cooler Wiring Diagram with External Signal...
- Page 23 Diagram 5. 3-Fan Gas Cooler Wiring Diagram (230V) Typical Gas Cooler Wiring Diagram withernal Signal...
- Page 24 Diagram 6. 3-Fan Gas Cooler Wiring Diagram (460V)Tys Cooler Wiring Diagram with External Signal...
- Page 25 Diagram 7. 4-Fan Gas Cooler Wiring Diagram (230V) with External Signal...
- Page 26 Diagram 8. 4-Fan Gas Cooler Wiring Diagram (460V) TSignal...
- Page 27 Diagram 9. 5-Fan Gas Cooler Wiring Diagram (230V) Typical Gas Cooler Wiring Diagram with Signal...
- Page 28 Diagram 10. 5-Fan Gas Cooler Wiring Diagram (460V) oler Wiring Diagram with External Signal...
- Page 29 Diagram 11. 6-Fan Gas Cooler Wiring Diagram (230V) Typical Gas Cooram with External Signal...
- Page 30 Diagram 12. 6-Fan Gas Cooler Wiring Diagram (460V) Typng Diagram with External Signal...
- Page 31 Diagram 13. 7-Fan Gas Cooler Wiring Diagram (230V) Typical Gas Cooler Wiring DiaSignal...
- Page 32 Diagram 14. 7-Fan Gas Cooler Wiring Diagram (460V) Typical Gas CoolExternSignal...
- Page 33 Diagram 15. Rack Controlled Unit Sensor Wiringypical Gas CoolExternSignal NO1 NO2 NO3 C1 NO4 N05 carel CPCO U2 GND ID2 ID3 IDC1 TEMPERATURE SENSOR WIRING HARNESSES 22684601, 22684707 AIR ON COIL FAN SPEED REFERENCE TEMPERATURE SENSORS FROM RACK TO RACK USE COPPER CONDUCTORS ONLY 22 TO 18 AWG SHIELDED CABLE FACTORY WIRING...
- Page 34 Diagram 16. Stand-Alone Unit Sensor Wiringypical Gas CoolExternSignal NO1 NO2 NO3 C1 NO4 N05 carel CPCO U4 GND ID2 ID3 IDC1 VG0 Y1 TEMPERATURE SENSOR WIRING HARNESSES 22684601, 22684707 USE COPPER CONDUCTORS ONLY 22 TO 18 AWG SHIELDED CABLE FACTORY WIRING FIELD WIRING...
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Page 35: Installation Check List
Installation Check List Adiabatic Gas Cooler Start Up Date Model # Serial # Electrical Voltage Amperage Installer: Name & Address Telephone: Please retain this information with the gas cooler... - Page 36 Since product improvement is a continuing effort, we reserve the right to make changes in specifications without notice . www .heatcraftrpd .com The name behind the brands you trust. ™ CLIMATE CONTROL Commercial Refrigeration Parts...
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