Timer, vent switch, replacement air damper,
Power Open and a 3-way ventilation switch
Hoyme Manufacturing Inc. Special Note: Circuits are colored for
and are not necessarily those found in actual installations.
Forced Air Furnace having a
supply duct together with an
controlled by a designated
3-way ventilation switch
interval timer Adaptor
to the furnace area.
Relay Adaptor with
Interval Timer Adaptor (TMADP-1102-TPX)
functions as a control centre.
Furnace fires with thermostat signal.
Three-way Ventilation Switch
in one position
allows the normal function of the
to turn on the Ventilation Fan, open the Replacement Air Damper
and turn on the Furnace Fan simultaneously. The
Ventilation switch in the other position,
turns on the
ventilation fan only
(Not recommended unless
living in coastal climates
warmer than -10C
and/or ample replacement air is supplied).
3. Optional switch
(i.e. toggle switch, timer, de-humidistat) connected between #1
and #2 of the Adaptor allows full control of Replacement Air Damper to open as required.
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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