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HM1 W RHRC G Y HM2 6
G
Y
5
3
2
4
R
H
W
1
HM1 HM2
6
Y
G
W
RC RH
ED
C
H
J
I
M
K
L
1
From heating system
2
From 24 VAC transformer
3
Red jumper wire (provided)
4
From fan relay
5
From cool system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
NOTE: Ensure that RED RH/RC jumper wire (provided with
thermostat) is connected between thermostat's RH and RC
terminals for proper operation with this system.
NOTE: For three-wire heat only system, connect terminals
GG
GG
G
,,
,,
,
WW
WW
W
and
RHRH
RHRH
RH. For cool only system, connect terminals
YY
YY
Y
,,
,,
,
G G
G G
G and
RHRH
RHRH
RH.
Figure 4 – Typical wiring diagram for heat only, cool only, & heat/cool single transformer system