Emerson Fluid Chiller Manuel D’Utilisation

The 8- and 10-ton process chiller is a self-contained air cooled system, containing two (2) scroll 

compressors and two (2) heat exchangers. An optional 2 HP multistage stainless steel pump may 

be included (see model number) to overcome the high pressure drop found in some MRI and CT 

systems.

The chiller includes a panel of gauges attached to the end of the cabinet. Eight (8) gauges are 

included:

• Suction Pressure Refrigerant Circuit #1
• Suction Pressure Refrigerant Circuit #2
• Discharge Pressure Refrigerant Circuit #1
• Discharge Pressure Refrigerant Circuit #2
• Water Inlet Pressure
• Water Outlet Pressure
• Water Inlet Temperature
• Water Outlet Temperature

Refrigerant Charge: 29.4 # per circuit R-22
Internal Glycol Volume (without 100 gallon storage tank):

12.4 gallons (8-ton, model PS096A)
12.6 gallons (10-ton, model PS120A)

Multistage Circulating Pump
The model number indication for the multistage pump is an “M” or “R” in the ninth character of 

the model number. For example PS096A-AM40.

1. Fully unscrew the pin located in the drain plug.
2. Close the discharge valve.
3. Remove the vent plug and fully unscrew the drain plug pin.
4. Open the suction valve until liquid flows out of the vent plug connection.
5. Install and torque the vent plugs to 15 lbs-ft. Close the drain plug pin and open the discharge 

valve.

For additional information, refer to the pump user manual that is shipped with the chiller and 

attached to the pump with a cable tie. Figure 3A shows the flow and pressure characteristics.

NOTE
The chiller includes a factory-installed and wired multistage circulating pump. It is 

Maintenance

18A