Description
This is a BRAND NEW OEM Aprilaire Humidifier Blower Activation Relay. Aprilaire part # 4851 (or AP-4851) . 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 pump or during times of the year where there is a need for humidity but not a need for heat. Aprilaire recommends that humidifer is plumbed to hot water when using this relay.Thanks for looking and good luck!
Function:
A valve is a device that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways
Replaces Old Part #s:
4851
Repair Difficulty Level:
Partial List of Units that Use This Item:
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