Honeywell CHRONOTHERM T8624C User Manual page 8

T8624C,D
INSTALLATION
Fig. 7—T8624D 2-stage heat/2-stage cool thermostat with HEAT-AUTO-COOL-OFF system and AUTO-ON
fan switching.
THERMOSTAT
LOGIC
CIRCUIT
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
FOR SINGLE TRANSFORMER SYSTEM, JUMPER R AND RC.
2
3 NOMINAL 24 Vac POWER MUST BE PRESENT BETWEEN
R AND C FOR THERMOSTAT OPERATION.
DENOTES THERMOSTAT TO SUBBASE INTERCONNECTION.
4
5 AVAILABLE ON T8624D MODELS ONLY.
4
POWER
SUPPLY
SYSTEM
SWITCH
HEAT
AUTO
COOL
OFF
SUBBASE
LOGIC/
CONTROL
CIRCUIT
HIGH
LIMIT
HIGH
LIMIT
HEAT 1
HEAT 2
COOL 2
FAN
COOL 1
SWITCH
AUTO
ON
8
L1
R
(HOT)
2
L2
1
HEATING
3
TRANSFORMER
C
HEAT RELAY 1
W1
HEAT RELAY 2
W2
COOLING
5
CONTACTOR 2
Y2
Y1
COOLING
CONTACTOR 1
G
FAN RELAY
2
L1
RC
(HOT)
L2
1
COOLING
TRANSFORMER
M3765