120VAC vent switch, combustion air(2 furnaces), replacement air
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations. Wires of the Combustion Air Damper, however, are colored as shown.
Diagram #5B: Two Mid-efficient Furnaces plus AC (If applicable).
ADDED: 1. Combustion Air Damper (HOM-0x12-SF2) 2. HAC-0x10-OPC for primary furnace. 3. ADP-1101-05A on primary furnace. 4. HAC-0x11-OPC damper for secondary furnace.
OPERATION: 1. Replacement Air Damper HAC-0x10-OPC is inter-connected to the Combustion Air Damper so that this damper opens during firing of either or both furnaces and closes when firing stops. 2. Ventilation Switch turns on the exhaust fan, the furnace fan and opens the primary HAC damper simultaneously. 3. The secondary damper HAC-0x11-OPC opens only when the secondary furnace fires. 4. Optional switch (i.e. toggle switch, timer, de-humidistat) on each HAC damper allows independent control of each damper.
0620 Printed In Canada
Printer friendly (pdf)
|