Air Furnace with a
supply duct controlled by a fresh air
Power Open Damper
Hoyme Manufacturing Inc. Special Note: Circuits are colored for
and are not necessarily those found in actual
Diagram #8B4: A Forced Air Furnace having a
combustion air supply duct and also a
replacement air supply duct that provides additional air for a 120Vac
gas dryer and for the normal operation of the home.
2. 24Vac Relay Adaptor with a Duplex Receptacle and a Red Light on/off Switch
(RADP-0242-S10A) to function as a control centre interlocked to
120Vac supply for a plug-in type
3. Replacement Air Control Damper
HAC-0x10-OPO (‘x’= diameter of duct).
1. Combustion Air Damper is
interlocked to open for furnace firing and/or interlocked to open for dryer operation.
Gas Dryer cord is plugged into the receptacle of the Adaptor
RADP-0242-S10A and the Adaptor cord is plugged into wall outlet previously occupied by the dryer. The
Gas Dryer will operate only after the Red Light Switch is turned on and the Combustion Air Damper is in the
Open) damper will open and close simultaneously with the Combustion Air Damper during the
drying cycle and
heating cycle. When the Dryer has completed its cycle, the Adaptor Red Light Switch is to be turned
off allowing the Combustion Air Damper and the Replacement Air Damper to
Note: This installation does not interfere with the
normal operation of the heating cycle of the furnace or the cooling cycle of the air conditioner.
1222-ld - Printed in Canada