Honeywell Chronotherm III T8602C - Page 5

69-0309—95
T8602A,B,C,D AND TS8602A,C Chronotherm
®
III FUEL SAVER THERMOSTATS
L1
(HOT)
L2
1
C
W
Y
RG
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
R8239A1052
ZONE 1
VALVE OR
DAMPER
MOTOR
ZONE 3
VALVE OR
DAMPER
MOTOR
ZONE 4
VALVE OR
DAMPER
MOTOR
ZONE 2
VALVE OR
DAMPER
MOTOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2
USE ONE R8239 FOR EVERY FOUR ZONES.
M2922
Fig. 11. T8602A,B circuit for controlling Honeywell or compatible two-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.
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
PRIMARY CONTROL, SUCH AS GAS VALVE OR ELECTRONIC
IGNITION MODULE.
CURRENT DRAW FOR W OR Y PLUS G MUST BE
LESS THAN 1.6A.
M2924
W
G
HEATING-COOLING WALLPLATE
R
RC
Y
COOLING
CONTACTOR
FAN
RELAY
HEATING
PRIMARY
CONTROL
L1
(HOT)
L2
1
L1
(HOT)
L2
1
1
2
3 3
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
PRIMARY CONTROL, SUCH AS GAS VALVE OR ELECTRONIC
IGNITION MODULE.
M2925
W
G
HEATING-COOLING WALLPLATE
R
Y
COOLING
CONTACTOR
FAN
RELAY
HEATING
PRIMARY
CONTROL
L1
(HOT)
L2
1
1
2
2
Fig. 13. T8602C,D heating/cooling circuit in a single
transformer system with gas heat/electric cooling and
electric furnace/electric cool. Controls fan in cooling
only (typical multi-speed fan application).
Fig. 12. T8602C,D heating/cooling circuit in a
two-transformer (one for heating, one for
cooling) system with gas heat and electric cooling,
RC and R terminals.