Forced Air Furnace having a Replacement Air Supply Duct controlled by a designated Ventilation Switch and/or Bathroom Timer and a Kitchen Exhaust Fan:
#8B9. Forced Air Furnace with Power Close Replacement Air Damper (HAC-0x10-OPC) and Two Exhaust/Ventilation Fans that use One Adaptor (ADP-1103-TW5) to Open Replacement Air Damper with Exhaust/Ventilation Fans and also opens 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 #8B9: Forced Air Furnace having a Replacement Air Supply Duct controlled by a designated Ventilation Switch and/or Bathroom Timer and a Kitchen Exhaust Fan.
- Use replacement Air Control Damper (Power Close) HAC-0x10-OPC
- Ventilation Switch and/or Bathroom Timer to supply Controlled 120Vac to Furnace area
- 24Vac dry contact switch points close when kitchen Exhaust Fan is operating
- Relay adaptor (ADP-1103-TW5) to function as a control center
OPERATION:
- Replacement Damper opens to provide fresh air during the heating cycles
- Ventilation Switch and/or Bathroom Timer turns on Ventilation Fan, opens Replacement Air Damper and turns on Furnace Fan simultaneously
- Kitchen Exhaust Fan closes 24Vac contact points, opens Replacement Air Damper and turns on Furnace Fan simultaneously
- Damper will remain closed during manual Furnace Fan operation
- Optional Switch (i.e. toggle switch) allows full control of the Replacement Air Damper to open separately provided it is a Power Close type Damper
Note: This installation does not interfere with the normal operation of the heating cycle of the Furnace or the cooling cycle of the Air Conditioner.