24Vac vent Switch with Relay, Replacement Air Damper – Power Close:
#8B. Forced Air Furnace With Power Close Replacement Air Damper (HAC-0x11-OPC) c/w Relay and a Ventilation Switch/Timer that uses Adaptor (ADP-0241-05A) to Ventilate and also Open During Furnace firing.
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations. Combustion Air Damper Wires, however, are colored as shown.
Diagram #8B: Forced Air Furnace having a Replacement Air Supply Duct together with an Exhaust Fan controlled by a designated Ventilation Switch and/or Bathroom Timer together with a 120Vac Relay that sends a 24Vac signal to the Furnace area.
- Replacement Air Control Damper, Power Close (HAC-0x11-OPC)
- Ventilation Switch and/or Bathroom Timer
- 24Vac Relay Adaptor (ADP-0241-05A) to function as a control center
OPERATION:
- Furnace fires with Thermostat signal
- Ventilation Switch and/or Bathroom Timer turns on Ventilation Fan, opens Replacement Air Damper and turns on Furnace Fan simultaneously
- Optional Switch (i.e. toggle switch, timer, de-humidistat) allows full control of Replacement Air Damper to open as required
N.B. Replacement Air Damper is not affected by the ‘Manual’ setting of the Furnace Fan.