Two 120Vac vent switches, One Primary & One Secondary Vent
Fan, Replacement air damper, Power Close with ADP-1101-10AS & ADP-1102-TWP
Hoyme Manufacturing Inc. Special Note: Circuits are colored for
and are not necessarily those found in actual installations.
Forced Air Furnace having one
replacement air supply duct together with
exhaust fans, one primary that overrides the secondary,
relay adaptors, one being
and the other (ADP-1102-TWP).
2. Two Ventilation Switches
that supply both live and controlled 120Vac to the furnace
Two Relay Adaptors interlocked,
and the other
Both function as control centers to open the replacement air damper by
either the primary or secondary ventilation fan switch and/ or by the thermostat setting.
Replacement Damper opens during furnace firing.
Ventilation Switch simultaneously turns on its own Exhaust Fan, opens the Replacement Air Damper and turns on the
Secondary Fan cannot operate while the
Primary Fan is on.
4. Optional Switch
(i.e. toggle switch) allows full control of the Replacement Air Damper to open separately provided it is a
Close type Damper.
N.B. Replacement Air Damper is not affected by the ‘Manual’ setting of the furnace fan
nor is the Air Conditioner affected in any way.
1632-ld - Printed in Canada
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