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HM1
6 Y G W
HM2
RC RH
HM1 W RH RC G Y HM2 6
A
1
L
M
KJ
1
I
H
M
NOTE: Two terminal choices (HM1 or HM2) are provided for
humidifier control. When the humidity setting is higher than the
room humidity:
HM1 turns off the humidifier when the call for heat ends.
HM2 powers the humidifier an additional 30 seconds after the
call for heat ends to provide slightly more humidity output.
Most installers will use HM1 unless they feel more humidity is
desirable.
Figure 8 – Typical wiring diagram for 24V humidifier system
1
From humidity system
See page 9 for letter identification.