Table 7-1. System Operating Pressures - Perlick HA24BB Service Manual

Residential Refrigeration
and Front Venting Commercial Refrigeration Service Manual
System Operating Pressures
Note: To check operating pressures, you must install access valves onto the process tubes. See Section
7.2.1.
Table 7-1 represent a range of normal pressures. The measured pressure can vary depending on
Values in
ambient conditions and at the point at which unit is in the refrigeration cycle.

Table 7-1. System Operating Pressures

Models
Freezer
Medium Temp*
Dual Zone Frz/Ref
Dual Zone Medium Temp**
*Medium Temp = Refrigerator, Beverage Center, Wine Reserve, Beer Dispenser
**Dual Zone Medium Temp = Ref/Wine and Wine/Wine
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Operating pressures shown in
Table 7-1 are nominal and dependent on
many factors (box temperature, position in the
refrigeration cycle, cleanliness of the condenser,
etc.), should only be used as reference.
Never add or remove charge based on the
operating pressures in Table 7-1. These prod-
ucts are critically charged and must have the
refrigerant charge weighed into the system with
accurate equipment to plus/minus 2 grams.
70° F
Low/High
4" Hg/105 PSIG
15 PSIG /110 PSIG
5" Hg/105 PSIG
12 PSIG /110 PSIG
Refrigeration System Repair Instructions
Ambient
90° F
Low/High
3" Hg/145 PSIG
16 PSIG /150 PSIG
4" Hg/145 PSIG
13 PSIG /150 PSIG
105° F
Low/High
2" Hg/185 PSIG
17 PSIG /190 PSIG
3" Hg/185 PSIG
14 PSIG /190 PSIG
Page 7-3