2-WIRE HEAT-ONLY (JUMPER INTACT)
A
B
HEATING
RELAY OR
VALVE COIL
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
C
D
JUMPER
W
Y
G
Rc
R
L1
(HOT)
1
L2
4-WIRE HEAT/COOL (JUMPER INTACT)
HEATING
RELAY OR
VALVE COIL
M1709B
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
25
A
C
B
D
W
Y
G
R
COOLING
CONTACTOR
COIL
FAN
RELAY
JUMPER
Rc
L1
(HOT)
L2
M1710B
69-1385