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Honeywell chronotherm 4 T8602A Manual

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69-0309—9 6
T8602A,B,C,D AND TS8602A,C Chronotherm
®
III FUEL SAVER THERMOSTATS
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M2926
W
G
HEATING-COOLING WALLPLATE
R
Y
L1
(HOT)
L2
1
L1
(HOT)
L2
1
OIL PRIMARY
RELAY
FAN
RELAY
AIR
COND.
EQUIP.
1
T
T
Fig. 14. T8602C,D heating/cooling circuit in an oil
heating and electric cooling system. Heating trans-
former is in oil primary.
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
FOR SYSTEMS WHERE THERMOSTAT MUST CONTROL
FAN DIRECTLY IN HEATING, SET FAN OPERATION SWITCH
TO ELEC POSITION. USE ONLY ONE TRANSFORMER, AND
JUMPER R AND RC.
FOR SINGLE TRANSFORMER SYSTEM, JUMPER R AND RC.
M319A
W
G
HEATING-COOLING WALLPLATE
R
RC
Y
COOLING
CONTACTOR
FAN
RELAY
HEATING
PRIMARY
CONTROL
1
3
2
3
L1
(HOT)
L2
1
O
B
2
HEATING
DAMPER
COOLING
DAMPER
L1
(HOT)
L2
1
Fig. 15. T8602C heating/cooling circuit in a two-
transformer system (gas heating and electric cooling).
Includes O and B terminals for changeover control.
See Table 2 to set fan operation switch.
SYSTEM
GRAVITY
AIR/WATER
HOT
WATER
GAS/OIL
WARM AIR
ELECTRIC
WARM AIR
1A
OUT 1/2
TO 1 TURN
OUT 1/2
TO 1 TURN
OUT 1/2
TO 1 TURN
OUT 1/2
TO 1 TURN
1B
IN
IN
(FACTORY SETTING)
IN IN
TIME/TEMP
DISPLAY
2A 2B
24 HR IN
12 HR
o
o
C
F
OUT 1/2
TO 1 TURN
OUT 1/2
TO 1 TURN
IN
RECOVERY
SELECTION
ADAPTIVE
INTELLIGENT ™
CONVENTIONAL
3A
IN
(FACTORY SETTING)
OUT 1/2 TO 1 TURN
M2082C
1 SCREWS 2A, 2B AVAILABLE ON SOME MODELS ONLY.
2 SWITCH 4A FOR FAN OPERATION SELECTION AVAILABLE ON
SOME MODELS ONLY.
1
3A
1A
1B
2A 2B
4A
2
Fig. 16. Cycle rate adjustment.
SETTING AND ADJUSTMENTS
Adjusting Cycle Rate
NOTE: MOST APPLICATIONS WILL NOT REQUIRE A
CHANGE IN CYCLE RATE.
The room air temperature will vary slightly from the comfort
temperature setting with the cycling of the furnace or air
conditioner. The equipment cycles off and on as the room
temperature approaches the setpoint.
The cycle rate of this thermostat is set for heating at six
cycles per hour and for cooling at three cycles per hour as
shipped from the factory. The cooling cycle rate cannot be
adjusted. On all models, except the TS8602, the heating
cycle rate can be adjusted by turning one or both cycle
rate adjustment screws located on the back of the ther-
mostat. See Fig. 16. The screws should only be backed
out about one-half to one turn, or be turned in until tight.
Adaptive Intelligent Recovery™/
Conventional Recovery
The thermostat is factory-set for Adaptive Intelligent
Recovery™, but may be converted to conventional
recovery using screw 3A on the back of the thermostat as
in-dicated in Fig. 16.
… 6 …


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  • Hi,
    I will not be in my house for a week and would like the heating system not to work. Right now it is in Auto, but I do not want the heating to work at all. Can you please advise Submitted on 8-11-2022 at 14:00

    Reply Report abuse


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