Home Support Colored Wiring Diagrams #9 - #9C1 #9C

Colored Wiring Diagram #9C

Timer, vent switch, replacement air, Power Close, and an exhaust fan with 3-way ventilation switch

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

Diagram #9C: Forced Air Furnace having a replacement air supply duct and an exhaust fan controlled by a designated ventilation switch, a 3-way ventilation switch and an Interval Timer Adaptor .

Replacement Air Damper , power close recommended, (HAC-0x10-OPC)
2. Ventilation Switch supplies Controlled and Regular 120Vac (3-Wire) power to the furnace area. 
3. A 3-way Ventilation Switch to control ventilation fan only.
4. An Interval Timer Adaptor (TMADP-1102-TPX) which functions as a complete control centre.

1. Furnace fires with thermostat signal. 
2. Ventilation switch turns on Ventilation Fan, opens Replacement Air Damper and turns on Furnace Fan simultaneously. 
3. Three-way Ventilation Switch turns on the Ventilation Fan only
(Not recommended unless living in coastal climates warmer than -10C and/or ample replacement air is supplied).  
4. Optional switch (i.e. toggle switch, timer, de-humidistat) allows full control of Replacement Air Damper to open as required provided it is a PC type.

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

1705-ld - Printed in Canada
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Last Updated (Tuesday, 23 May 2017 11:34)