24Vac vent switch, combustion air, and replacement air
Hoyme Manufacturing Inc. Special Note: Circuits are colored for
and are not necessarily those found in actual installations. Wires of
Combustion Air Damper, however, are
colored as shown
Forced Air Furnace having a
supply duct together with an
controlled by a designated
ventilation switch and/or bathroom timer that sends a 24Vac
signal to the furnace area.
Combustion Air Damper
Ventilation Switch and/or bathroom timer to supply
to the furnace area.
4. 24Vac Relay Adaptor (ADP-0241-05A)
to function as a control centre.
Combustion Air Damper and Replacement air damper open during furnace firing.
2. Ventilation Switch and/or bathroom timer turns on Exhaust Fan, opens
Replacement Air Damper and turns on Furnace Fan simultaneously.
(i.e. toggle switch, timer, de-humidistat) allows full control of Replacement
Air damper to open as required provided it is a
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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