Optional Pumpout System Maintenance; Optional Pumpout Compressor Oil Charge; Optional Pumpout Safety Control Settings; Ordering Replacement Chiller Parts - Carrier 19XRV Start-Up, Operation And Maintenance Instructions Manual

Untreated or improperly treated
Water Treatment —
water may result in corrosion, scaling, erosion, or algae. The
services of a qualified water treatment specialist should be
obtained to develop and monitor a treatment program.
Water must be within design flow limits, clean, and treated
to ensure proper chiller performance and reduce the poten-
tial of tube damage due to corrosion, scaling, erosion, and
algae. Carrier assumes no responsibility for chiller damage
resulting from untreated or improperly treated water.
Inspect the VFD
The motor leads must be disconnected from the VFD
before an insulation test is performed. The voltage
generated from the tester can damage the VFD or drive
components.
Before working on any VFD, shut off the chiller, open and
tag all disconnects supplying power to the VFD. After dis-
connecting input power to a VFD and before touching any
internal components, wait five minutes for the DC bus
capacitors to discharge, then check the voltage with a volt-
meter. Failure to observe this precaution could result in
sever bodily injury or death.
The disconnect on the VFD front panel does not deenergize
all internal circuits. Open all internal and remote discon-
nects before servicing the VFD.
Never open isolating knife switches while equipment is
operating. Electrical arcing can cause serious injury.
Periodically vacuum or blow off accumulated debris on in-
ternal VFD enclosure components with a high-velocity, low-
pressure blower.
Power connections on newly installed VFDs may relax
and loosen after a month of operation. Turn power off and
retighten. Recheck annually thereafter.
Loose power connections can cause voltage spikes, over-
heating, malfunctioning, or failures.
Recalibrate Pressure Transducers —
the pressure transducers should be checked against a pressure
gage reading. Check all eight transducers: the 2 oil differential
pressure transducers, the condenser pressure transducer, the
cooler pressure transducer, the diffuser pressure transducer
(only for compressors equipped with split ring diffusers), and
the optional waterside pressure transducer pairs (consisting of
4 flow devices: 2 cooler, 2 condenser).
Note the evaporator and condenser pressure readings on the
HEAT_EX screen on the ICVC (EVAPORATOR PRESSURE
and CONDENSER PRESSURE). Attach an accurate set of
refrigeration gages to the cooler and condenser Schrader
fittings. Compare the two readings. If there is a difference in
readings, the transducer can be calibrated as described in the
Troubleshooting Guide section. Oil differential pressure (OIL
PUMP DELTA P on the COMPRESS screen) should be zero
whenever the compressor is off.
Optional Pumpout System Maintenance —
pumpout unit compressor maintenance details, refer to the
19XR Positive Pressure Storage System Installation, Start-Up,
and Service Instructions.
OPTIONAL PUMPOUT COMPRESSOR OIL CHARGE —
Use oil conforming to Carrier specifications for reciprocat-
ing compressor usage. Oil requirements are as follows:
ISO Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 or 220
Carrier Part Number . . . . . . . . . . . PP23BZ103 or PP23BZ104
The total oil charge is 13 oz. (0.5 L)
Oil should be visible in the pumpout compressor sight glass
both during operation and at shutdown. Always check the oil
level before operating the pumpout compressor. Before adding
changing oil, relieve the refrigerant pressure through the access
valves.
Relieve refrigerant pressure and add oil to the pumpout unit
as follows:
1. Close service valves 2 and 4.
2. Run the pumpout compressor in Automatic mode for one
minute or until the vacuum switch is satisfied and com-
pressor shuts off.
3. Move the pumpout selector switch to OFF. Pumpout
compressor shell should now be under vacuum.
4. Oil can be added to the shell with a hand oil pump
through the access valve in the compressor base.
NOTE: The compressor access valve has a self-sealing fitting
which will require a hose connection with a depressor to open.

OPTIONAL PUMPOUT SAFETY CONTROL SETTINGS

(Fig. 43) — The optional pumpout system high-pressure
switch opens at 185 psig (1276 kPa) and closes at 140 psig
(965 kPa). Check the switch setting by operating the pumpout
compressor and slowly throttling the pumpout condenser
water.
Ordering Replacement Chiller Parts —
ordering Carrier specified parts, the following information
must accompany an order:
• chiller model number and serial number
• name, quantity, and part number of the part required
• delivery address and method of shipment.
Once a year,
a19-1569
Fig. 43 — Pumpout Control Box (Interior)
81
TERMINAL
FUSES
CONTACTOR
STRIP
TRANSFORMER
For
When
SWITCH