Carrier 33ZCVAVTRM Specifications download pdf (Page 132)

Install Sensors — The PremierLink™ controller can be

used with either the T58 communicating sensor or any combi-

nation of CO

and space temperature sensors. Refer to the in-

structions supplied with each sensor for electrical require-

ments.

NOTE: All sensors are field-installed accessories.

SPACE TEMPERATURE (SPT) SENSOR INSTALLA-

TION — There are four types of SPT sensors available from

Carrier: The 33ZCT55SPT space temperature sensor with

timed override button, the 33ZCT56SPT space temperature

sensor with timed override button and set point adjustment, the

33ZCT58SPT T58 communicating room sensor with timed

override button, set point adjustment, and manual fan control,

and the 33ZCT59SPT space temperature sensor with LCD

screen, override button, and set point adjustment.

The space temperature sensors are used to measure the

building interior temperature. The T58 communicating room

sensors measure and maintain room temperature by communi-

cating with the controller. Sensors should be located on an

interior building wall. The sensor wall plate accommodates the

NEMA (National Electrical Manufacturers Association)

standard 2 x 4 junction box. The sensor can be mounted direct-

ly on the wall surface if acceptable by local codes.

Do not mount the sensor in drafty locations such as near air

conditioning or heating ducts, over heat sources such as base-

board heaters, radiators, or directly above wall-mounted light-

ing dimmers. Do not mount the sensor near a window which

may be opened, near a wall corner, or a door. Sensors mounted

in these areas will have inaccurate and erratic sensor readings.

The sensor should be mounted approximately 5 ft from the

floor, in an area representing the average temperature in the

space. Allow at least 4 ft between the sensor and any corner

and mount the sensor at least 2 ft from an open doorway. The

SPT sensor wires are to be connected to terminals in the unit

main control board.

Install the sensor as follows:

1. Locate the 2 Allen type screws at the bottom of the

sensor.

2. Turn the two screws clockwise to release the cover from

the sensor wall mounting plate.

3. Lift the cover from the bottom and then release it from

the top fasteners.

4. Feed the wires from the electrical box through the open-

ing in the center of the sensor mounting plate.

5. Using two no. 6-32 x 1 mounting screws (provided with

the sensor), secure the sensor to the electrical box.

NOTE: Sensor may also be mounted directly on the

wall using 2 plastic anchors and 2 sheet metal screws

(field-supplied).

6. Use 20 gage wire to connect the sensor to the controller.

The wire is suitable for distances of up to 500 ft. Use a

three-conductor shielded cable for the sensor and set

point adjustment connections. The standard CCN

communication cable may be used. If the set point adjust-

ment (slidebar) is not required, then an unshielded, 18 or

20 gage, two-conductor, twisted pair cable may be used.

The CCN network service jack requires a separate,

shielded CCN communication cable. Always use sepa-

rate cables for CCN communication and sensor wir-

ing. (Refer to Fig. 3-6 for wire terminations.)

7. Replace the cover by inserting the cover at the top of the

mounting plate first, then swing the cover down over the

lower portion. Rotate the 2 Allen head screws counter-

clockwise until the cover is secured to the mounting plate

and locked in position.

NOTE: See Table 3 for thermistor resistance vs temperature

values.

Table 3 — Thermistor Resistance vs Temperature

Values for Space Temperature Sensor,

Supply Air Temperature Sensor, and

Outdoor Air Temperature Sensor

Wiring the Space Temperature Sensor

— To wire the sensor,

perform the following (see Fig. 3-6):

1. Identify which cable is for the sensor wiring.

2. Strip back the jacket from the cables for at least 3 inches.

Strip

-in. of insulation from each conductor. Cut the

shield and drain wire from the sensor end of the cable.

TEMP

(C)

TEMP

(F)

RESISTANCE

(Ohms)

–40 –40 335,651

–35 –31 242,195

–30 –22 176,683

–25 –13 130,243

–20 –4 96,974

–15 5 72,895

–10 14 55,298

–5 23 42,315

0 32 32,651

5 41 25,395

10 50 19,903

15 59 15,714

20 68 12,494

25 77 10,000

30 86 8,056

35 95 6,530

40 104 5,325

45 113 4,367

50 122 3,601

55 131 2,985

60 140 2,487

65 149 2,082

70 158 1,752

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

Fig. 3 — Space Temperature Sensor

Typical Wiring (33ZCT55SPT)

1 2 ... 127 128 129 130 131 132 133 134 135 136 137 ... 315 316

Carrier 33ZCVAVTRM Specifications Page 132

Comments to this Manuals

Carrier 33ZCVAVTRM Specifications Page 132

Comments to this Manuals

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