Honeywell T775A Benutzerhandbuch
T775A,B,C,D REMOTE TEMPERATURE CONTROLLER
63-2489—2
6
Fig. 7. Sensor mounted on wall.
Fig. 8. Parallel-series wiring of sensors.
WIRING
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
CAUTION
Do not use 24 Vac power at terminals 5 and 6 to
power any external loads if 120 Vac or 240 Vac is
used to power the T775.
IMPORTANT
The T775 is an operating control, not a limit or safety
control. If used in applications requiring safety or limit
controls, use a separate safety or limit control device
in conjunction with the T775.
Refer to Fig. 3 or 4 for locating the appropriate power inputs,
remote sensor input, load output terminals, contact closure
input and sensor selection switch. Access to the terminals can
be gained through standard conduit knockouts (A through C)
located around the perimeter of the enclosure.
NOTE: Hole A should only be used for sensor, low-voltage
and contact closure wiring.
When wiring the input power, only one source of power can be
applied to the T775 (for example, 24 Vac or 120 Vac or
240 Vac). Knockouts B and C can be used to gain access to
120 Vac or 240 Vac input terminals and the load relay output
terminals.
See Fig. 11 through 14 for typical T775 wiring and applications.
IMPORTANT
Poor wiring practices can cause erratic temperature
readings from the 193987GA Sensor. Avoid the
following to ensure proper operation:
• Do not route the temperature sensor wiring with
building power wiring.
• Do not locate the temperature sensor wiring next to
control contactors.
• Do not locate the temperature sensor wiring near
electrical motors.
• Do not locate the temperature sensor wiring near
welding equipment.
• Make sure good mechanical connections are made to
both the sensor and the controller.
• Do not mount the sensor with the leadwire end (wire
end) pointing up in an area where condensation can
occur.
If any of the above conditions cannot be avoided, use
shielded cable.
NOTE: Ground the cable shield at the T775 connection only,
not at the sensor connection (see Fig. 5).
M8109C
193987GA
SENSOR
T7047C1090
WALLMOUNT SENSOR
CASE (OPTIONAL)
CAUTION: POSITION SENSOR AWAY
FROM SCREW TERMINALS.
SCREW
TERMINAL
SCREW
TERMINAL
LEADWIRES
TO T775
TO T775 CONNECTIONS 1 AND 2 (SENSOR A)
OR 7 AND 8 (SENSOR B).
SENSORS
M7431