Two 120Vac Vent Switches, One Primary & One Secondary Vent Fan, Replacement Air Damper, Power Close with ADP-1101-10AS & ADP-1102-TWP:
#6A8. Two 120vac Ventilation Fan Switches (One Primary and One Secondary Ventilation Fans), Two Adaptors (ADP-1102-TWP) and (ADP-1102-10AS), One Power Close Replacement Air Damper (-PC), Opens during Furnace Firing.
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 #6A8: Forced Air Furnace having one Replacement Air Supply Duct together with two Exhaust Fans, one primary that overrides the secondary, both controlled by two interlocking Relay Adaptors, one being (ADP-1101-10AS) and the other (ADP-1102-TWP).
- A Replacement Air Damper, Power Close (HAC-0x10-OPC)
- Two Ventilation Switches that supply both live and controlled 120Vac to the Furnace area
- Two Relay Adaptors interlocked, one being (ADP-1101-10AS) and the other (ADP-1102-TWP), 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
OPERATION:
- Replacement Damper opens during Furnace firing
- Either Ventilation Switch simultaneously turns on its own Exhaust Fan, opens the Replacement Air Damper and turns on the Furnace Fan
- The Secondary Fan cannot operate while the Primary Fan is on
- Optional Switch (i.e. toggle switch) allows full control of the Replacement Air Damper to open separately provided it is a Power Close type Damper
(For Power Open Damper, see Diagram #6A7)
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.