1 results for "Aprilaire 4851 Blower Relay" between $10.00 and $50.00

Aprilaire #4851 Blower Activation Relay. Allows digital control (#58) to turn on system fan when there is a call for humidification (but not heat). For Aprilaire series 500, 600, and 700 humidifiers that use the Automatic Digital Humidifier Controls (# 56 and # 58). This device will initiate HVAC fan operation when there is a call for humidity, even when there is no heat call. Use this relay in applications where humidifier operation is required beyond a call for heat, e.g. when installed on a heat...