Honeywell Home T4 Pro Series - Wiring diagrams; 1 Stage Heat Only: Gas or Oil Furnace; 1 Stage Cool Only; 1 H;1 C: Gas Furnace + Air-Conditioning

4
Wiring diagrams
W R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
M38990
1
COMMON OPTIONAL.
G USED FOR INDEPENDENT FAN CONTROL ONLY. MOST HEA
T
ONLY, GAS OR OIL FORCED AIR SYSTEMS DO NOT USE A FAN
(G) WIRE.
2
1
2
FURNACE
R/Rc
SWITCH UP
O/B
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
M38991
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1
COMMON OPTIONAL.
AIR-HANDLER
Y R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
1
O/B
R/Rc
SWITCH UP
M38992
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
1
COMMON OPTIONAL.
W R
G
C
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
FURNACE
O/B
RW
Y
G
C
1
1
R/Rc
SWITCH UP
M38993
S
S
Y
Y2
G
C
U
U
A
W2
W
K
Rc
R
L/A
E
AUX
OIL FURNACE
O/B
RW
Y
G
C
R
1
COMMON OPTIONAL.
1
AIR HANDLER
COMPATIBLE MODELS:
TH4110U2005
TH4210U2002
R/Rc SWITCH
DOWN
1 Stage Heat Only: Gas or Oil Furnace 1 Stage Cool Only
1H/1C: Gas Furnace +
AirConditioning
2 Transformer System, 1H/1C: Oil
Furnace + AirConditioning