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Fail-Safe Operation: The normally open configuration ensures continuous flow if pneumatic pressure is interrupted
It is strongly recommended to use this OEM part
You will need a 13/16" (21mm) socket wrench for the cartridge and a 1/2" (13mm) wrench for the four hex-head bolts securing the strainer housing
As a critical component for 80+ efficiency furnaces
Technicians typically observe erratic temperature readings at the control board
IO Hvac Controls iO-WWR480 Relay R-22 Fail-Safe Operation: The normally openThe iO WWR480 Warning Watchdog is a professional grade voltage monitoring relay engineered specifically for 440 480V commercial HVAC units. Designed to be installed directly within the service compartment of a condensing unit, this SPDT relay provides critical protection for the compressor contactor by monitoring incoming power quality. As a veteran technician knows, phase imbalances and voltage spikes in 480V systems are leading causes of premature