Honeywell T8700B Product Data page 5

T8700
R
G
Y
W
HEATING
PRIMARY
1
CONTROL
L1
(HOT)
24V
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
Fig. 7. T8700C heat-cool wiring diagram in single trans-
former system with gas or electric heat/electric cooling.
T8700
R
G
Y
W
1
L1
(HOT)
1
L1
L2
(HOT)
24V
L2
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
Fig. 8. T8700C heat-cool wiring diagram
in oil heating/electric cooling system.
(Oil primary has its own transformer.)
BLACK
L1
(HOT)
1
L2
BLUE
RED
RESISTANCE
HEATER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 9. T8700B1007 Heat Only wiring diagram in
electric baseboard or ceiling cable system.
T8700B,C AN ELECTRONIC ROUND PROGRAMMABLE THERMOSTAT
COOLING
CONTACTOR
FAN
RELAY
M13207
COOLING
CONTACTOR
FAN
RELAY
T T
OIL PRIMARY
CONTROL
M12526
T8700
R
W
R841C
SWITCH
BIMETAL
HEATER
SWITCH
M12527B
T8700
R W
L2
L1
(HOT)
2
1
V8043E
3
T
1
2
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
CONNECT V8043E YELLOW LEADWIRE TO THERMOSTAT.
3 CONNECT V8043E RED LEADWIRES TO AQUASTAT®.
Fig. 10. T8700B1007 Heat Only wiring diagram
for controlling 2-wire hot water zone valves.
THERMOSTAT T8700B
R
1
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
CONNECT 7870 OHM RESISTOR TO THE TACO ZONE
2
VALVE TERMINALS 1 AND 2. (TO ORDER, USE PART
NO. 4074EYC.)
Fig. 11. T8700B1007 Heat Only diagram used with TACO
zone valves. The 7870 OHM resistor is included.
5
T8700 T8700
R W R W
2 2
V8043E V8043E
3 3
B1
T
TO
BURNER
CONTROL
CIRCUIT
B2
C1 C2
CIRCULATOR
M12623
W
TACO ZONE VALVE
RESISTOR
1
2
3
M13178
68-0197—1
2