Timer, vent switch and replacement air opens during firing
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations.
Diagram #10: High-efficient Forced Air Furnace plus AC (If applicable).
ADDED: 1. Replacement Air Damper with Relay (HAC-0x11-OPC) 2. Ventilation Switch with Controlled and Regular 120VAC, 3-Wire supply to furnace area.
3. Relay Adaptor with Interval Timer (TMADP-1102-TPX) as control centre.
OPERATION: 1. Replacement Air Damper opens during furnace firing.
2. Ventilation Switch turns on Ventilation Fan, opens Replacement Air Damper and turns on Furnace Fan simultaneously without interfering with the Air Conditioner. 3. Interval Timer, with minimum or multiple consecutive settings of 15 minutes each, can turn on Ventilation Fan, open Replacement Air Damper and turn on Furnace Fan simultaneously. 4. Opt. Switch (i.e. toggle switch, timer, de-humidistat) allows full control of the Replacement Air Damper to open provided it is a PC type.
0621 Printed in Canada
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