Vent switch, replacement air - power closed, interlocked with exhaust fan

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.

Diagram #6C: Forced Air Furnace having a replacement air supply duct together with and exhaust fan controlled by a designated ventilation switch and/or bathroom timer.
 
1. Use Replacement Air Control Damper (Power Close) - (HAC-0x10-OPC). 
2. Ventilation Switch and/or bathroom timer to supply Controlled 120Vac to furnace area. 3. Relay Adaptor (ADP-1102-TWP) to function as a control centre.
 
OPERATION: 1. Replacement Damper opens to provide fresh air during the ventilation and/or heating cycle. 2. Ventilation Switch and/or bathroom timer turns on Ventilation Fan, opens Replacement Air Damperand turns on Furnace Fan simultaneously.
3. Optional Switch (i.e. toggle switch, timer, de-humidistat) allows full control of the Replacement Air Damper to open as required.
 
N.B. Replacement Air Damper is not affected by the ‘Manual’ setting of the furnace fan.
Also the Air Conditioner is not affected by the use of this wiring system.
 

 

1006                                                                                                Printed in Canada

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