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Remote “Purge Fault” Alarm Relay (RY7)
Remote purge fault alarm relay RY7 is used to enunciate a purge fault alarm at a location
remote from the purge unit. (see Figure 4 on page 17).
Auxiliary Relay (RY8)
Auxiliary relay RY8 is used when Pre-Alarm option is installed for interlocking peripheral
equipment.
Terminal Block (TB1)
Terminal block TB1 is a terminal strip used for field wiring to the purge unit (see Figure 4 on
page 17).
Control Transformer (T1)
Transformer T1 is a 12 volt power transformer used to power the microprocessor circuit board
(see Figure 4 on page 17).
Constant pressure expansion valve
The function of the constant pressure expansion valve is to regulate and maintain constant
evaporating temperature within the purge tank cooling coil under varying load conditions.
Summary of Contents for Redi-Purge PRG-113-C3
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