Honeywell T7079A, Product Data

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T7079A,B SOLID STATE REMOTE TEMPERATURE CONTROLLERS
3 63-2572—04
Table 3. 10K thermistor output.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure 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.
IMPORTANT
All wiring must agree with applicable codes,
ordinances and regulations.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
Location and Mounting
Mount the controller on a convenient interior location using the
three mounting holes provided on the back of the enclosure
(mounting screws are not provided and must be obtained
separately). Use controller dimensions in Fig. 1 as a guide.
Sensor Location
The sensor can be located up to 400 feet (122 meters) from
the T7079 using standard AWG 18/2 unshielded wire. The
sensor may be attached to pipes, in an immersion well, in a
wall-mounted case or on a bulb holder.
NOTES:
— For cable runs greater than 25 feet, shielded cable
is recommended.
— Multiple sensors can be parallel-series wired to
sense average temperatures in large spaces.
See Fig. 2.
— To maintain control accuracy, the number of
sensors wired parallel-series must be n
2
(examples: 4, 9, 16).
Fig. 2. Parallel-series wiring of sensors.
Sensor Mounting
IMPORTANT
The T7079 is an operation 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 T7079.
Mount the sensor(s) in one of the following manners:
— Hot/cold water sensing: Strap sensor to a pipe or insert in a
well (see Fig. 3).
— Space temperature sensing: Mount on a wall or panel
(see Fig. 4).
— Duct air sensing: Tape to a standard cap or bulb holder.
Fig. 3. Sensor inserted in an immersion well.
Resistance °C °F
97820 -20 -4
32740 0 32
19920 10 50
12500 20 68
10000 25 77
8056 30 86
5326 40 104
3604 50 122
2491 60 140
1756 70 158
1261 80 176
920.9 90 194
TO T7079
SENSORS
M13129
M5249
SENSOR PLACED
IN WELL
IMMERSION
WELL
1/2 NPT
COVER SENSOR
LEADS WITH
HEAT CONDUCTIVE
COMPOUND