Honeywell T8131A Owner's Manual page 26

3-WIRE HEAT-ONLY
A
B
HEATING
RELAY OR
VALVE COIL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
W Y G
R
C
1
L1
(HOT)
L2
M9213
4-WIRE COOL-ONLY
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
26
A
B
W Y G
C
COOLING
CONTACTOR
COIL
FAN
RELAY
R
1
L1
(HOT)
L2
M9212
69-0887—1