Humidifier - Mitsubishi Electric PAA-A18AA1 Service Manual

PAA-A18, 24, 30, 36, 42AA1/BA1/CA1 and all-

10. Humidifier

Part Number: CN24RELAY-KIT-CM3
Control Board in Control Box
12vdc
coil
Humidifier
Humidistat (field)
max 30 ft.
Control Box
Humidifier Control
Sequence of operation:
1. The humidistat closes CNF.
2. The furnace blower turns on.
3. CN25 provides 12 VDC to turn on the humidifier (do not exceed 1 watt draw per relay).
4. When the humidistat opens CNF, the furnace blower continues to run for 30 seconds to clear the
ductwork of moist air.
5. If defrost starts during humidifier operation, CN25 de-energizes.
Humidistat:
• Non-voltage a-contact input
• Contact rating voltage >=15 VDC
• Contact Rating Current >= 0.1 A
• Minimum Applicable Load =< 1mA at DC
Specifications are subject to change without notice. 38 © 2022 Mitsubishi Electric US, Inc.