Honeywell T775A Benutzerhandbuch

5

63-2489—2

1. Read these instructions carefully. Failure to follow them 

could damage the product or cause a hazardous 

condition.

2. Check ratings given in instructions and on the product to 

ensure the product is suitable for your application.

3. Installer must be a trained, experienced service 

technician.

4. After installation is complete, check out product 

operation as provided in these instructions.

Disconnect power supply before installation.

Mount the controller on any convenient interior location using 

the two mounting holes provided on the back of the metal 

enclosure (mounting screws are not provided and must be 

obtained separately). Use controller dimensions in Fig. 1 

(T775A,B) or Fig. 2 (T775C,D) as a guide.

The 193987GA Sensor can be located up to 1000 feet (304m) 

from the T775 using standard AWG 18/2 unshielded wire. For 

cable runs greater than 25 feet shielded cable is 

recommended. See Fig. 5. It may be located on pipes, in an 

immersion well, in a wall-mounted case or on a bulb holder. 

See Fig. 7. The 193987GA is not a water tight or water 

resistant sensor. For wet applications, see the Accessories list 

in the Specifications section.

Multiple sensors can be parallel-series wired to sense average 

temperatures in large spaces. 

To maintain control accuracy, the number of sensors parallel-

series wired must be of the n2 power (for example, 4, 9, 16, 

etc.). See Fig. 8.

Sensors can be mounted on a wall or panel for sensing space 

temperature (Fig. 7), strapped to a pipe or inserted in a well 

(Fig. 6) for hot/cold water sensing, or taped to a standard cap 

or bulb holder for duct air sensing. To prevent moisture or 

condensation entering the sensor through the leadwire holes, 

mount the sensor with the lead wires exiting the bottom of the 

sensor.

NOTE: Use heat conductive compound in immersion wells. 

See Accessories in the Specifications section.

Make sure that metal tube of sensor does not short 

against T terminals in wall-mounted case.

SELECT

SET

ENTER

1

2 3 4

1

2

3

4

SA SB

C \ F

SENSOR 

A

SENSOR 

B

TOD

24V

5 6

120V
COM
240V

OUTPUT 2

OUTPUT 1

OUTPUT 3

OUTPUT 4

NO
COM
NC

NO

COM

NC

NC

COM

NO

7 8

NC

COM

NO

T775

GROUND 

SHIELD

TO T775 

CABLE OR TO 

GROUNDING

SCREW

SHIELDED

CABLE

SHIELDED

CABLE

GROUNDING SCREW

NOTE: DO  NOT GROUND 

            SHIELDED CABLE AT 

            SENSOR END.

NOTE: TO MINIMIZE NOISE PICKUP, MAKE CONNECTION 

            FROM SHIELDED CABLE AS CLOSE AS POSSIBLE 

            TO SENSOR BODY.

SENSOR

M7430

M5249

SENSOR PLACED

IN WELL

IMMERSION

WELL

1/2 NPT

COVER SENSOR

LEADS WITH

HEAT CONDUCTIVE

COMPOUND