Water Leaks; Water Treatment; Inspect The Starting Equipment; Recalibrate Pressure Transducers - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

Hard scale may require chemical treatment for its prevention or
removal. Consult a water treatment specialist for proper treat-
ment.

Water Leaks

The refrigerant moisture indicator on the refrigerant motor cool-
ing line (Fig. 2) indicates whether there is water leakage during
chiller operation. Water leaks should be repaired immediately.
CAUTION
The chiller must be dehydrated after repair of water leaks or
damage may result. See Chiller Dehydration section,
page 18.

Water Treatment

Untreated or improperly treated 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.
CAUTION
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 Starting Equipment

Before working on any starter, shut off the chiller, open and tag
all disconnects supplying power to the starter.
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 front panel does not always
de-energize all internal circuits. Open all internal and re-
mote disconnects before servicing the starter. Failure to fol-
low this procedure may result in personal injury by electric
shock.
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, over-
heating, 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 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 47.

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
Carrier Part Number
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. 33)
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. 33 — 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.
42
68 or 220
PP23BZ103 or PP23BZ104
TERMINAL SWITCH
FUSES
STRIP
TRANSFORMER