Delfield installation manual Control Settings 500 CR & or, Pressure Control

500 Series Display Cases Service and Installation Manual

CONTROL SETTINGS: 500 CR & OR

Pressure Control

The temperature is controlled by an adjustable pressure control located in the machine compartment. An adjustable control has the word COLDER near the knob, with an arrow to indicate the adjustment direction. These controls are field adjustable and do not require a service agent. If you have any questions, feel free to contact the Delfield Service Department.

The refrigeration systems on self-contained CR & OR models were adjusted at the factory to maintain between 36°F and 40°F. No adjustment should be necessary. If adjustment does become needed however, the factory recommended settings are:

Low-pressure settings (CR models): 82 psi cut-in, 47 psi cut-out, 35 psi differential.

Low-pressure settings (OR models): 82 psi cut-in, 40 psi cut-out, 42 psi differential.

Operating pressures: High, 170 to 200 psi. Low, 30 to 37 psi.

In attempting to adjust the pressure control, you can do damage to your unit by accidentally adjusting the differential. Please make small incremental adjustments if a temperature adjustment is necessary, please contact the service department at Delfield (800) 733-8829 #1, or your local service agent. Delfield is not responsible for charges incurred while having the pressure control adjusted.

For customer service, call (800) 733-8829, (800) 773-8821, Fax (989) 773-3210, www.delfield.com 5