50
Inspect the Starting Equipment or VFD
Before working on any starter, shut off the chiller, open and tag
all disconnects supplying power to the starter.
Periodically vacuum accumulated debris on the internal parts.
Use electrical cleaner for electrical parts as required.
Power connections on newly installed starters may relax and
loosen after a month of operation. Turn power off and retighten.
Recheck annually thereafter.
Recalibrate Pressure Transducers
Once a year, the pressure transducers should be checked
against a pressure gage reading. Check all eight transducers:
the 2 oil differential pressure transducers, the condenser pres-
sure transducer, the cooler pressure transducer, and the optional
waterside pressure transducer pairs (consisting of 4 flow devic-
es: 2 cooler, 2 condenser). For details, see page 55.
Optional Pumpout System Maintenance
For 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 reciprocating
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 com-
pressor 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. 47)
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.
Fig. 47 — Pumpout Control Box (Interior)
Ordering Replacement Chiller Parts
When ordering Carrier specified parts, the following informa-
tion 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.
CAUTION
The motor leads must be disconnected from the starter be-
fore an insulation test is performed. The voltage generated
from the tester can damage the starter components.
WARNING
The disconnect on the starter/VFD front panel does not al-
ways de-energize all internal circuits. Open all internal and
remote disconnects before servicing the starter. Failure to
follow this procedure may result in personal injury by elec-
tric shock.
WARNING
Never open isolating knife switches while equipment is op-
erating. Electrical arching can cause serious injury.
CAUTION
Loose power connections can cause voltage spikes, over-
heating, malfunctioning, or failures.
a19-1569
CONTACTOR
TERMINAL
STRIP
FUSES
TRANSFORMER
SWITCH
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