5 68-0148—1T8131A,B,C; T8132A,B,CINSTALLATION

Fig. 8—2-wire heat-only application (jumper

intact). Fig. 10—4-wire heat/cool application (jumper

intact).

RRc
W Y G
B D
A C

2-WIRE HEAT-ONLY (JUMPER INTACT)

M1709B
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
1
HEATING
RELAY OR
VALVE COIL
JUMPER
RRc
W Y G
B D
A C

4-WIRE HEAT/COOL (JUMPER INTACT)

L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
JUMPER
HEATING
RELAY OR
VALVE COIL
M1710B
COOLING
CONTACTOR
COIL
FAN
RELAY

Fig. 9—3-wire cool-only application (jumper

intact).

Fig. 11—5-wire heat/cool application (jumper

removed).

RRc
W Y G
B D
A C

3-WIRE COOL-ONLY (JUMPER INTACT)

L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
JUMPER
M848A
COOLING
CONTACTOR
COIL
FAN
RELAY
RRc
W Y G
B D
A C

5-WIRE HEAT/COOL (JUMPER REMOVED)

L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
M1711B
L1
(HOT)
L2
COOLING
CONTACTOR
COIL
FAN
RELAY
HEATING
RELAY OR
VALVE COIL
1 1