Check Optional Pumpout System Controls And Compressor; High Altitude Locations; Charge Refrigerant Into Chiller - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

Fig. 42 — Enable QuickTest, Screen 1
Fig. 43 — Enable QuickTest, Screen 2
Fig. 44 — QCKTESTA - Quick Test A
Check Optional Pumpout System Controls and
Compressor
Controls include an on/off switch, a 0.5-amp fuse for the second-
ary side of the transformer, 0.25-amp fuses for the primary side of
the transformer, the compressor overloads, an internal thermostat,
a compressor contactor, refrigerant low pressure cutout and a re-
frigerant high pressure cutout. The high pressure cutout is factory
set to open at 185 psig (1276 kPa) and reset at 140 psig (965 kPa).
The low pressure cutout is factory set to open at 7 psia
(–15.7 in. Hg) and close at 9 psia (–11.6 in. Hg). Ensure the water-
cooled condenser has been connected. Ensure oil is visible in the
compressor sight glass. Add oil if necessary.
See the Pumpout and Refrigerant Transfer Procedures section on
page 45 and the Optional Pumpout System Maintenance section
on page 58 for details on the transfer of refrigerant, oil specifica-
tions, etc.

High Altitude Locations

Because the chiller is initially calibrated at sea level, it is necessary
to recalibrate the pressure transducers if the chiller has been
moved to a high altitude location. Thermistor and pressure trans-
ducer calibration menus are found in the Quick Test Menu. See the
calibration procedure in the Troubleshooting Guide section.

Charge Refrigerant into Chiller

The transfer, addition, or removal of refrigerant in spring iso-
lated chillers may place severe stress on external piping if
springs have not been blocked in both up and down directions.
Failure to block springs in both up and down directions could
result in severe personal injury and equipment damage.
Always operate the condenser and chilled liquid pumps during
charging operations to prevent freeze-ups. Damage may result
to equipment if the condenser and chilled water pumps are not
operated during pumpdown or charging.
The standard 23XRV chiller is shipped with the refrigerant already
charged in the vessels. However, the 23XRV chiller may be or-
dered with a nitrogen holding charge of 15 psig (103 kPa). In this
case, evacuate the nitrogen from the entire chiller, and charge the
chiller from refrigerant cylinders.
CHILLER EQUALIZATION WITHOUT A PUMPOUT UNIT
When equalizing refrigerant pressure on the 23XRV chiller after
service work or during the initial chiller start-up, do not use the
discharge isolation valve to equalize because the force that
could be exerted by the valve handle could cause personal
injury. Either the motor cooling isolation valve or the charging
hose (connected between the pumpout valves on top of the
cooler and condenser) should be used as the equalization valve.
The following steps describe how to equalize refrigerant pressure
in an isolated 23XRV chiller without a pumpout unit.
IMPORTANT: Turn on the chilled liquid and condenser liquid
pumps to prevent freezing.
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CAUTION
CAUTION
WARNING