Carrier 33ZCSECTRM Especificaciones descargar pdf (Pagina 6)

Sensor Information —

Each zone controller requires a

Carrier space temperature sensor that must be ordered separate-

ly. There are two space sensors available for this application

the 33ZCT55SPT space temperature sensor with override but-

ton and the 33ZCT56SPT

space temperature sensor with over-

ride button and set point adjustment.

SPACE TEMPERATURE SENSORS — The sensor housing

is plastic ABS. The connections are screw terminals. The

weight is 0.18 lbs. See Fig. 1 for sensor dimensions.

The 33ZCT56SPT space temperature sensor has a set point

potentiometer that provides a set point input. The set point

potentiometer range for each sensor can be adjusted from –15°

to 15° F. Adjustment direction is indicated by COOL and

WARM on the sensor cover.

The temperature sensor uses a 10K Ohm thermistor to sense

ambient temperature. See Table 1 for resistance vs. temperature

values for the thermistor.

The sensor is designed to be mounted in a vertical mounting

position for proper operation.

33ZCT55SPT SENSOR — The 33ZCT55SPT space sensor is

a basic space temperature sensor for use with the zone control-

ler. It contains a thermistor to sense room temperature, override

button for initiating a timed override, and an RJ11 jack for the

connection of a CCN Network Service Tool. The sensor com-

munications connection (RJ11) is concealed behind a remov-

able cover. The sensor is field installed.

Space Temperature Sensor Wiring

— In order to provide

temperature sensing and override functions, the 33ZCT55SPT

sensor must be connected to the zone controller using 20 AWG

twisted pair cables. Pressing the timed override button on the

33ZCT55SPT sensor produces the required short-circuit signal.

See Fig. 2 for internal schematic. The sensor has a screw termi-

nal connector to facilitate wiring. All wiring from the zone con-

troller to the sensor is field supplied.

Sensor terminals 1 and 2 are used for space temperature

sensing. The space temperature sensor range is 32 to 120 F,

with a nominal resistance of 10,000 ohms at 77 F.

33ZCT56SPT SENSOR — The 33ZCT56SPT space temper-

ature sensor is field-installed. The 33ZCT56SPT is a wall

mounted sensor capable of measuring the ambient temperature

at its location, and is equipped with an override button. The

override button (when pressed) provides a short across the in-

ternal thermistor. The sensor is also equipped with an RJ11

Service jack with a 6 pin termination block for CCN connec-

tion. The sensor is equipped with a 100K ohm (nominal) linear

slide potentiometer.

Space Temperature Sensor Wiring

— In order to provide

temperature sensing and the override functions, the

33ZCT56SPT sensor must be connected to the zone controller

using 3-conductor, 18 to 20 AWG cables. (The CCN communi-

cation cable may be used.) Pressing the timed override button

the 33ZCT56SPT sensor produces the required short-circuit

signal. See Fig. 2 for internal schematic. The sensor has a

screw terminal connector to facilitate wiring. All wiring from

the zone controller to the sensor is field supplied. The sensor’s

thermistor has a range of 32 to 158 F with a nominal resistance

of 10,000 ohms at 77 F.

NOTE: Dimensions are in inches.

Fig. 1 — Space Temperature Sensor and Wall

Mounted Humidity Sensor Dimensions

5 4 3 2 1

(24 VAC +)

(CCN +)

(CCN GND)

(UNUSED)

(CCN -)

(24 VAC -)

PUSH BUTTON

OVERRIDE

SW1

10K

SENSOR

100K

0 OHMS

SEN

SET

INTERNAL SCHEMATIC

T56 ONLY

RJ-11

SERVICE JACK

Fig. 2 — Temperature Sensor Internal Wiring

1 2 3 4 5 6 7 8 9 10 11 ... 43 44

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Carrier 33ZCSECTRM Especificaciones Pagina 6

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