Home Support Colored Wiring Diagrams #8B - #8D2 #8D1

Colored Wiring Diagram #8D1

Two Forced Air Furnaces sharing a replacement air supply duct controlled by one fresh air damper with Power Open Damper

HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations.

1. Replacement Air Control Damper, Power Open (HAC-0x10-OPO) where ‘x’ = diameter of the damper.
2. 24Vac Relay Adaptor (ADP-0241-05A) to operate the damper from either furnace.
3. Additional Adaptor (ADP-0241-05A to operate the damper for night cooling.


The Power Open (PO) Replacement Air Control Damper will open when the thermostat of either furnace asks for heat, and will remain open until both thermostats turn the furnaces off.

2. Damper will open on cooling cycle of furnace #2.

1222-ld - Printed in Canada

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Last Updated (Thursday, 09 February 2017 12:15)