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69-0309—9
4
T8602A,B,C,D AND TS8602A,C Chronotherm
®
III FUEL SAVER THERMOSTATS
L1
(HOT)
L2
L2
1
L1
(HOT)
1
4
2
5
6
3
M8600
S8610U
MV
MV/PV PV
GND
(BURNER)
24V
GND
24V
TH-W
VENT
DAMPER
PLUG
SENSE
SPARK
THERMOSTAT
LIMIT
CONTROLLER
PILOT
BURNER
GROUND
SENSOR
IGNITER
MV
MV/PV
MV
VR8345
DUAL VALVE COMBINATION
GAS CONTROL
PILOT GAS
SUPPLY
1
2
3
4
5
6
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
ALTERNATE LIMIT CONTROLLER LOCATION.
MAXIMUM CABLE LENGTH 3 FT (0.9M ).
CONTROLS IN 24V CIRCUIT MUST NOT BE
GROUND LEG TO TRANSFORMER.
LEAVE VENT DAMPER PLUG CONNECTED.
REMOVE JUMPER AND CONNECT SENSE
TERMINAL ON TWO ROD APPLICATION ONLY.
CONTROLLER
COMBUSTION
AIR BLOWER
MOTOR
COMBUSTION
AIR BLOWER
RELAY
AIR
PROVING
SWITCH
W
R
Fig. 9. T8602A,B heating-only circuit in a Honeywell Intermittent Pilot Gas Burner Ignition System.
L1
(HOT)
L2
1
C
W
Y
R
G
W
R
W
R
W
R
W
R
ZONE 1
HEATING ONLY WALLPLATE
ZONE 2
HEATING ONLY WALLPLATE
ZONE 3
HEATING ONLY WALLPLATE
ZONE 4
HEATING ONLY WALLPLATE
2
3
3
3
3
R8239A1052
R8222B1067
R8222B1067
R8222B1067
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2 USE ONE R8239 FOR EVERY FOUR ZONES.
USE FOR 3-WIRE ZONE VALVE OR DAMPER.
3
ZONE 1
VALVE OR
DAMPER
MOTOR
ZONE 2
VALVE OR
DAMPER
MOTOR
ZONE 3
VALVE OR
DAMPER
MOTOR
ZONE 4
VALVE OR
DAMPER
MOTOR
M2921
Fig. 10. T8602A,B circuit for controlling incompatible or three-wire zone valves or dampers. Heating or cooling
equipment is operated by an end switch on the zone valve or motor, or by a thermostat in a master zone.