Timer, vent switch and replacement air
HMI Hoyme Manufacturing Inc. Special Note: Circuits are colored for clarification only and are not necessarily those found in actual installations.
Diagram #9A: High-efficient Forced Air Furnace plus AC (if applicable).
ADDED: 1. Replacement Air Damper (HAC-0x10-OPC) 2. Ventilation Switch supplies Controlled and Regular 120VAC, (3-Wires) to the furnace area.
3. Relay Adaptor with Interval Timer (TMADP-1102-TPX) functions as a control centre.
OPERATION: 1.Furnace fires with thermostat signal. 2.Ventilation Switch turns on Ventilation Fan, opens Replacement Air Damper and turns on Furnace Fan simultaneously without interfering with the AC. 3. Interval Timer can be set for minimum or multiple consecutive settings of 15 minutes to turn on Ventilation Fan, open Replacement Air Damper and turn on Furnace Fan. 4. Optional switch (i.e. toggle switch, timer, de-humidistat) allows full control of Replacement Air Damper to open as required provided it is a PC type.
0619 Printed in Canada
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