Carrier Pro-Dialog CONTROL 4 Bedienungsanleitung PDF herunterladen (Seite 5)

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Pressure sensors

Two types of electronic (high and low-pressure) sensors

are used to measure the suction and discharge pressure in

each circuit.

Thermistors

The outdoor temperature sensor is installed under a metal

plate. The compressor suction gas temperature sensors are

installed just upstream of the compressor.

If temperature sensor control is selected:

• The NTC 10 K room temperature sensor must be placed

in a position that is representative of the room tempera-

ture. Avoide exposure to the sun or to humidity.

• The NTC 5 K supply air sensor must be placed in a

position that is representative of the supply air tempe-

rature (downstream of the evaporator).

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Solenoid valves

Two solenoid valves must be installed on the liquid line of

each circuit to permit pumpdown of the circuit during

shut-down.

Alarm LED

An LED installed at the front of the control box displays

the unit alarms.

Alarm reset button

A push button installed at the front of the control box

permits resetting all activated unit alarms.

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The contacts below are available at the user terminal block on

the NRCP2-BASE boards. Some contacts can only be used

if the unit operates in the remote operating mode (Remote).

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J2A

J2B

J12

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Carrier Pro-Dialog CONTROL 4 Bedienungsanleitung Seite 5