10
HM1W RHRC G Y HM26
G
Y
5
3
24
RH
W
1
HM1 HM2
6YGWRC RH
EDCH
JI
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