Figure 2-2. Refrigeration service unit panel details.
(a) Leak-detector. The leak detector, housed
2. Crack purge valve to purge air from gauge
in a shock-resistant vinyl case, consists of a control unit, a
assembly. When gauge and hose assembly are purged,
probe, a six foot long, hose, and a six foot long power
tighten fitting F 1 and open purge valve fully.
cord. To operate the leak-detector, refer to figure 2-2 and
3. If refrigeration system components are
proceed as follows.
below 75 F (24 C) apply heat to refrigerant in power
1. Remove cap from bulkhead fitting F1 on
refrigeration service unit panel. Loosely connect one end
of hose assembly to service unit bulkhead fitting Fl.
Securely connect other end of hose assembly to purge
valve located at power plant condenser outlet.