Electronic Expansion Valve (Exv); Moisture Indicator; Filter Drier; Sensors - Carrier AquaForce 30XB series Installation, Operation And Maintenance Instructions

Air-cooled screw chillers
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11 - MAJOR SYSTEM COMPONENTS AND OPERATION DATA
According to the Regulation No. 640/2009 and amendment 4/2014 implementing Directive 2009/125/EC with regard to ecodesign
requirements for electric motors.
30XB
Motor type
Number of poles
Nominal input frequency
Nominal voltage
number of phases
Motor included in the application domain of the regulation
640/2009 and amendment 4/2014
Rationale for exemption
Ambient air temperature for which the motor is specifically
designed

11.6 - Electronic expansion valve (EXV)

The EXV is equipped with a stepper motor (2785 to 3690 steps,
depending on the model) that is controlled via the EXV board. The
EXV is also equipped with a sightglass that permits verification of
the mechanism movement and the presence of the liquid gasket.

11.7 - Moisture indicator

Located on the EXV, permits control of the unit charge and indicates
moisture in the circuit. The presence of bubbles in the sight-glass
indicates an insufficient charge or non-con-densables in the
system. The presence of moisture changes the colour of the
indicator paper in the sight-glass.

11.8 - Filter drier

The role of the filter drier is to keep the circuit clean and moisture-
free. The moisture indicator shows, when it is necessary to change
the element. A difference in tempera-ture between the filter inlet
and outlet shows that the element is dirty.

11.9 - Sensors

The units use thermistors to measure the temperature, and
pressure transducers to control and regulate system operation.
Refer to the 30XB/30XAS/30XW Touch Pilot control manual for a
more detailed explanation.

11.10 - Service valve (option 92)

The unit can be equipped with optional service valves to facilitate
maintenance and repair operations.
If option 92 is ordered, each refrigerant circuit will be supplied with
shut-off valves on the compressor economiser, discharge and
suction lines.
ATTENTION: The compressor suction valve must be used
without pressure difference at the terminals. If there is a
pressure difference, leak-tightness at the valve may be lost
and the valve can even fail altogether.
30XB Standard
Asynchronous
6
Hz
50
V
400
3
No
Article 1.2.c).(ii)
°C
70
11.11 - Power factor correction capacitors
(option 231)
They garantee a minimum power factor performance of 0.95 when
unit operates at a condition that involves a power input that
exceeds the Eurovent standard condition.
A fix capacitor bank is switched at start of each compressor. It
provides individual power factor correction for each machine
refrigerant circuit.
Capacitors are dry type : no risque of leakage or fire.
The capacitors are selected for each compressor as per below
table:
Compressor
06TSA155
06TSA186
06TTA266
06TTA301
06TTA356
06TUA483
06TUA554
Caution: Operation of the unit without capacitors results in
current raising
30XB Option 15LS
Asynchronous
8
50
400
3
No
Article 2.1
70
Equal pressure
Capacitor (kVAR)
15
20
35
35
35
45
45
30XBP
EC motor
6
50/60
380/480
3
NO
Article 2.1
70
Ir (A)
22
29
51
51
51
65
65
59

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