Humidifier - Mitsubishi Electric PAAA18AA1 Installation Manual

15.11. Humidifier

Humidifier
Humidistat (field)
Humidifier Control
Sequence of operation:
1. The humidistat closes CNF.
2. The furnace blower turns on.
3. CN25 provides 12VDC to turn on the humidifier (do not exceed 1 watt draw per relay).
4. When the humidistat opens, 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 >=15VDC
• Contact Rating Current >= 0.1 A
• Minimum Applicable Load =< 1mA at DC
Mode no.
13
16
(applies if Mode no.
13 Setting no. = 2)
© 2022 Mitsubishi Electric US, Inc.
PAA-A18, 24, 30, 36, 42AA1/BA1/CA1
Part Number: CN24RELAY-KIT-CM3
12vdc
coil
max 30 ft.
Setting
no.
1 Humidifier not supported
(CN25 output is ON if CNF input has 12 VDC applied or if
there is a relevant "CN25 peripheral ON" IT protocol re-
quest via CN105, regardless of mode or settings)
2 Humidifier supported
1 See Mode 16 table below.
2 See Mode 16 table below.
96
Control Board in Control Box
Control Box
Settings
Specifications are subject to change without notice.