Combustion air damper
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations. Combustion Air Damper Wires, however, are colored as shown.
Diagram #1: A Forced Air Furnace or Boiler having a combustion air supply duct.
OPERATION: Combustion Air Damper is interlocked to the Thermostat/Aqua-stat and the gas valve so that the damper proves to be open to supply fresh air before the furnace/boiler fires. The damper closes to conserve energy when the fire stops.
1222-ld - Printed in Canada
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