Home Support Colored Wiring Diagrams #6C - #7A1 #7A1

Colored Wiring Diagram #7A1

24Vac vent switch, combustion air, and replacement air with two exhaust fans and two individual timers Power Close

HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations. Wires of the Combustion Air Damper, however, are colored as shown .

Color Wiring Diagram #7A1

Diagram #7A1: A Forced Air Furnace, a combustion air supply duct, a replacement air supply duct, two exhaust fans, two individual timers and an adaptor ADP-0241-10A.

1. Combustion Air Damper (HOM-0x11-SF1)  
2. Replacement Air Damper (HAC-0x10- OPC)  
3. Two exhaust fans having individual timers with 24Vac switching capabilities  
4. 24Vac Relay Adaptor (ADP-0241-10A) to function as a control centre.

OPERATION:  
1. Combustion Air Damper and Replacement Air Damper open during furnace firing.  
2. Ventilation Switch/Timer (either one) turns on Exhaust Fan(s), opens Replacement Air Damper and turns on Furnace Fan simultaneously. 
3. Optional switch (i.e. toggle switch, de-humidistat) allows full control of Replacement Air damper to open as required provided it is a Power Close type. 

N.B. Replacement Air Damper is not affected by the ‘Manual’ setting of the furnace fan.

1633-ld - Printed in Canada

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Last Updated (Wednesday, 17 August 2016 10:42)