Recalibrate Pressure Transducers; Optional Pumpout System Maintenance; Ordering Replacement Chiller Parts - Carrier AquaEdge 19XR Series Start-Up, Operation And Maintenance Instructions Manual

CAUTION
The motor leads must be disconnected from the starter before
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 always
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 electric shock.
WARNING
Never open isolating knife switches while equipment is oper-
ating. Electrical arching can cause serious injury.
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.
CAUTION
Loose power connections can cause voltage spikes, overheat-
ing, malfunctioning, or failures.

Recalibrate Pressure Transducers

Once a year, the pressure transducers should be checked against a
pressure gage reading. Check all eight transducers: the 2 oil differ-
ential pressure transducers, the condenser pressure transducer, the
cooler pressure transducer, and the optional waterside pressure
transducer pairs (consisting of 4 flow devices: 2 cooler, 2 condens-
er). For details, see page 57.

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 be-
fore 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. 53)
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.
CONTACTOR
a19-1569
Fig. 53 — Pumpout Control Box (Interior)

Ordering Replacement Chiller Parts

When 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.
52
TERMINAL SWITCH
FUSES
STRIP
TRANSFORMER