Product Info

There are certain control malfunctions which can occur with any thermal type purge regardless of make or model, such as welded relay contacts, locked-up microprocessor, or a unit accidentally left in manual mode, which can cause the pump-out compressor to latch-up in a non-stop running condition. Under these conditions the purge unit's built-in "Excessive Purge Fault" safety cannot stop the pump-out compressor and can result in catastrophic loss of refrigerant. The purpose of the Purge Guard is to detect the above condition and terminate pump-out activity. Since the Purge Guard functions independently from the purge unit's microprocessor control it is able to terminate pump-out activity irrespective of the nature of the malfunction.