a33-9187
Fig. 34 — Thermostat Wiring — Humidifier and Blower Fan
NOTES:
1. D1 and D2 can be used independently for equipment requiring a
dry contact.
2. If humidifier has its own low voltage power supply, do not connect
directly to the thermostat. Use isolated relays.
3. For humidifer control, 24-V is provided from the HUM terminal to
operate the equipment.
4. For fan control, 24-V is applied from Rh to the fan (G) through
relay contacts D1 and D2.
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