#4851 Aprilaire Blower Activation Relay
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#4851 Aprilaire Blower Activation Relay Overview
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. Note: Aprilaire recommends that humidifier is plumbed to hot water when using this relay.
#4851 Aprilaire Blower Activation Relay Feature
- Aprilaire #4851 Blower Activation Relay.
- For Aprilaire series 500, 600, and 700 humidifiers that use the Automatic Digital Humidifier Controls (# 56 and # 58).
- Allows digital control (#58) to turn on system fan when there is a call for humidification (but not heat).
- This device will initiate HVAC fan operation when there is a call for humidity, even when there is no heat call.
