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T775A,B,C,D REMOTE TEMPERATURE CONTROLLER
63-2489—2 12
Fig. 11. Two-stage control, 24 Vac input, 24 Vac load.
COOL MODE
HEAT MODE
RELAY 1 AND 2
ENERGIZED
RELAY 1 AND 2
ENERGIZED
NULL
NULL
RELAY 1 ENERGIZED
RELAY 1 ENERGIZED
TEMPERATURE
FALL
DIFFERENTIAL
2
TEMPERATURE
FALL
DIFFERENTIAL
1
TEMPERATURE
RISE
TEMPERATURE
RISE
SETPOINT 1
DIFFERENTIAL
1
DIFFERENTIAL
2
SETPOINT 2
SETPOINT 2
SETPOINT 1
SENSOR A
LOAD 2
24 VAC
LOAD 1
SELECT
SET
ENTER
12
3
4
1
2
3
4
SA SB
C \ F
SENSOR
A
TOD
24V
5
6
120V
COM
240V
OUTPUT 2
OUTPUT 1
NC
COM
NO
NC
COM
NO
7 8
M7421A
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
FOR T775B,D: CONNECT SENSOR B TO PINS 7 AND 8.
DIP SWITCHES FOR SENSOR SELECTION. PRESENT OF T775B,D ONLY.
1
2
3
2
2
3
L1
(HOT)
L2
1