
98
services of a qualified water treatment specialist should be ob-
tained to develop and monitor a treatment program.
Inspect the Starting Equipment —
Before work-
ing on any starter, shut off the chiller, open and tag all discon-
nects supplying power to the starter.
Periodically vacuum or blow off accumulated debris on the
internal parts with a high-velocity, low-pressure blower.
Power connections on newly installed starters may relax
and loosen after a month of operation. Turn power off and re-
tighten. Recheck annually thereafter.
Recalibrate Pressure Transducers —
Once a
year, the pressure transducers should be checked against a pres-
sure 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 pres-
sure 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 re-
frigeration 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 —
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
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. Current
compressor units do not have a sump access valve. Add
oil through
3
/
8
-in. oil recovery line between compressor
and oil separator line (fitting may need to be added).
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.
Ordering Replacement Chiller Parts —
When or-
dering 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.
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.
CAUTION
The motor leads must be disconnected from the VFD
before an insulation test is performed. The voltage gener-
ated from the tester can damage the VFD or drive
components.
WARNING
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
severe bodily injury or death.
WARNING
The disconnect on the VFD front panel does not deenergize
all internal circuits. Open all internal and remote discon-
nects before servicing the VFD.
WARNING
Never open isolating knife switches while equipment is
operating. Electrical arcing can cause serious injury.
CAUTION
Loose power connections can cause voltage spikes, over-
heating, malfunctioning, or failures.
CONTACTOR
TERMINAL
STRIP
FUSES
TRANSFORMER
SWITCH
Fig. 53 — Pumpout Control Box (Interior)
a19-1569
Summary of Contents for AquaEdge 19XR series
Page 69: ...69 Fig 33 19XR Leak Test Procedures a19 1625 ...
Page 154: ...154 Fig 64 Benshaw Inc Wye Delta Unit Mounted Starter Wiring Schematic Low Voltage a19 1873 ...
Page 161: ...161 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v ...
Page 162: ...162 Fig 69 Typical Low Voltage Variable Frequency Drive VFD Wiring Schematic 575 v cont ...
Page 186: ...186 APPENDIX B LEAD LAG WIRING 19XR Lead Lag Schematic Series Cooler Flow a19 1655 ...
Page 187: ...187 APPENDIX B LEAD LAG WIRING cont 19XR Lead Lag Schematic Parallel Cooler Flow a19 1717 ...