Four-Stage Control, 24 Vac Input; 24 Vac Load - Honeywell T775A User Manual

Fig. 13—Four-stage control, 24 Vac input; 24 Vac load.
LOAD 3
LOAD 4
TEMPERATURE
FALL
RELAY 1,2 AND 3
ENERGIZED
DIFFERENTIAL 3
RELAY 1 AND 2
SETPOINT 3
ENERGIZED
DIFFERENTIAL 2
SETPOINT 2
RELAY 1 ENERGIZED
DIFFERENTIAL 1
SETPOINT 1
N OTE: FOR THERMOSTAT APPLICATIONS, CONNECT NO CONTACT OF COOLING STAGE TO Y1 (AND SECOND STAGE TO Y2)
CONNECT NO CONTACT OF HEATING STAGE TO W1 (AND SECOND STAGE TO W2).
SENSOR B
to pins 7 AND 8
for T775B,D
SENSOR A SENSOR
A
24 VAC
OUTPUT 2
NC
LOAD 1
COM
NO
LOAD 2
COM
OUTPUT 3
COOL MODE
TEMPERATURE
RISE
NULL
C \ F
SET
SELECT ENTER
SA SB
1 2 4 5 6 8
3 7
TOD 24V SENSOR
B
OUTPUT 1
120V
NC
COM
COM
240V
NO
NO
NO
COM
NC
NC
OUTPUT 4
HEAT MODE
NULL
TEMPERATURE
FALL
RELAY 1 ENERGIZED
RELAY 1 AND 2
ENERGIZED
RELAY 1,2 AND 3
ENERGIZED
15
T775A,B,C,D
CHECKOUT
DIP SWITCHES
FOR SENSOR
SELECTION.
PRESENT ON
T775B,D ONLY
SETPOINT 1
DIFFERENTIAL 1
SETPOINT 2
DIFFERENTIAL 2
SETPOINT 3
DIFFERENTIAL 3
TEMPERATURE
RISE
M7425
63-2489