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or improper venting that forces flames or hot flue gases out of the burner opening
Its rectangular form factor allows for secure fitment in tight control boxes often found in ductless mini-split and furnace applications
As a veteran-grade general purpose limit switch
The bimetal sensing element is tuned to open the electrical circuit at 150°F to prevent heat exchanger damage and close at 110°F once temperatures return to a safe operational threshold
return air
ZoneFirst PIRR Relay or improper venting that forcesThe ZoneFirst PIRR is a 24Vac 4PDT Plug In Relay engineered as a direct high performance replacement for RR and RMABS relays. Designed for immediate integration into the 4PDR relay socket, this "ice cube" style component is a fundamental requirement for maintaining legacy electromechanical zone control panels, including older TAT Mark IV, V, VII, VIII, XXXI II, and MM 2 3 systems. This relay features gold flashed silver alloy contacts rated for 3A at