Forced Air Furnace with Combustion and Replacement Air Supply Ducts – Power Close or Power Open Replacement Air Damper.
#8D3. Forced Air Furnace with Combustion Air Damper (HOM-0x11-SF1) and a Power Close or Power Open Replacement Air Damper (HAC-0x10-OPC/OPO) that uses Adaptor (ADP-0241-05A) to Open Replacement Air Damper during firing only.
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations.
Diagram #8D3: Forced Air Furnace with a Combustion Air Damper and a separate Air Supply Duct for a Replacement Air Damper, both to open when firing the Furnace.
NOTE: Fresh Air Damper may be a Power Open or Power Closed type. Connect to Terminals #4 of the Adaptor for Power Close Damper or connect to Terminal #5 oft he Adaptor for a Power Open Damper.
- Combustion Air Damper (HOM-0x11-SF1)
- Replacement Air Damper, Power Open or Power Close (HAC-0x10-OPC/OPO)
- 24Vac Relay Adaptor (ADP-0241-05A) to operate the Replacement Air Damper during firing only.
OPERATION:
- Combustion and Replacement Air Dampers open during Furnace firing signaled from Thermostat.
N.B. Replacement Air Damper is not affected by the ‘Manual’ setting of the Furnace Fan.