Standing Vacuum Test - Carrier AquaEdge 23XRV Start-Up, Operation And Maintenance Instructions Manual

2. Open the charging valve fully.
3. Slowly open the cylinder regulating valve.
4. Observe the pressure gage on the chiller and close the
regulating valve when the pressure reaches test level. Do
not exceed 140 psig (965 kPa).
5. Close the charging valve on the chiller. Remove the cop-
per tube if no longer required.
Repair the Refrigerant Leak, Retest, and
Apply Standing Vacuum Test —
the chiller, test for leaks with a soap bubble solution, an elec-
tronic leak detector, a halide torch, or an ultrasonic leak detec-
tor. Bring the chiller back to atmospheric pressure, repair any
leaks found, and retest.
After retesting and finding no leaks, apply a standing vacu-
um test. Then dehydrate the chiller. Refer to the Chiller Dehy-
dration in the Before Initial Start-Up section, page 71.
Trim Refrigerant Charge —
to adjust the refrigerant charge to obtain optimum chiller per-
formance, operate the chiller at design load and then add or re-
move refrigerant slowly until the difference between LEAVING
CHILLED LIQUID chilled liquid temperature and the EVAP
REFRIG LIQUID TEMP reaches design conditions. Do not
overcharge. For superheat information, see the Troubleshoot-
ing Guide section on page 96.
Refrigerant may be added either through the optional stor-
age tank or directly into the chiller as described in the section
entitled, Refrigerant Charging.
To remove any excess refrigerant, follow the procedure in
Transfer Refrigerant from Chiller to Pumpout Storage Tank
section, Steps 1a, b on page 87.
WEEKLY MAINTENANCE
Check the Lubrication System —
el on the oil sump sight glasses and observe the level each
week while the chiller is running. Check the moisture indicator
on the motor cooling line.
If the level goes below the bottom of the oil sump sight
glass, the oil reclaim system will need to be checked for proper
operation. The oil reclaim system is operating properly if the
level in the oil sump increases after running the chiller near full
load with a 95 F (35 C) or higher CONDENSER TEMPERA-
TURE for 1 hour. If additional oil is required, add it through the
oil charging valve (Fig. 2-7). A hand pump is required for add-
ing oil against refrigerant pressure. The oil charge for the
23XRV chiller is 7.5 gallons (28 L).
The oil must meet Carrier's specifications for the 23XRV
chillers. Refer to Changing Oil and Oil Filter section. Any oil
that is added should be logged by noting the amount and date
in Fig. 51 on page 85. Any oil that is added due to oil loss not
related to service will eventually return to the sump. Excess oil
must be removed when the level is above the top of the oil
sump sight glass.
A 530-watt oil sump heater is controlled by the PIC III con-
trols to maintain oil temperature above 140 F (60 C) or CALC
EVAP SAT TEMP plus 53 F (29.4 C) when the compressor is
off (see the Controls section on page 18). The ICVC Status
COMPRESS table displays whether the heater is energized or
not. If the PIC III controls show that the sump heater is ener-
gized, but the sump is not heating up, the power to the oil sump
heater may be off or the oil level may be too low. Check the oil
level, the sump oil heater contactor voltage, and oil heater re-
sistance.
The PIC III controls will not permit compressor start-up if
the oil temperature is less than 140 F (60 C) or CALC EVAP SAT
After pressurizing
If it becomes necessary
Mark the oil lev-
TEMP plus 15 F (8.3 C), whichever is lower. The control will
continue with start-up only after the temperature is within limits.
SCHEDULED MAINTENANCE
Establish a regular maintenance schedule based on the actu-
al chiller requirements such as chiller load, run hours, and cool-
er and condenser liquid quality. The time intervals listed in this
section are offered as guides to service only. Jobsite conditions
may dictate that maintenance schedule is performed more often
than recommended.
NOTE: The Optional Extended Warranty includes specific
maintenance requirements and service intervals that must be
documented. See specific details in the Optional Extended
Warranty agreement.
Service Ontime —
ONTIME value on the MAINSTAT table. This value should be
reset to zero by the service person or the operator each time
major service work is completed so that time between service
can be seen.
Inspect the Control Center —
ally limited to general cleaning and tightening of connections.
Vacuum the control center enclosure to eliminate dust build-up.
In the event of chiller control malfunctions, refer to the Trou-
bleshooting Guide section for control checks and adjustments.
Power connections on newly installed equipment may relax
and loosen after a month of operation. Turn off power and
re-tighten, check annually thereafter.
Be sure power to the control center is off when cleaning
and tightening connections inside the control center. Fail-
ure to be sure power is off will result in severe personal
injury or death.
Check Safety
To ensure chiller protection, the Automated
Monthly —
Control Test in the service menu should be done at least once
per month. See Table 5 for safety control settings.
Do not manually open the oil reclaim isolation valve when
the chiller is shut down. Doing so will flood the vaporizer
with refrigerant and severely degrade the viscosity of the
oil in the sump.
Changing Oil and Oil Filter —
SURE DELTA P approaches the 18 psid (124 kPad) LOW OIL
PRESSURE ALARM threshold, change oil filter as needed.
Otherwise, change the oil filter on a two year schedule.
Oil analysis is an important part of a good preventive main-
tenance program. Carrier recommends a yearly oil analysis.
Changing oil is not recommended unless the oil analysis indi-
cates problems. (The Optional Extended Warranty program
has specific requirements.) If no analysis is being performed,
change the oil after 5 years. See Oil Specification section on
page 91 for additional information.
Compressor oil is hygroscopic. Containers should remain
tightly sealed in a clean and dry environment to prevent
moisture absorption from the air.
90
The ICVC will display a SERVICE
Maintenance is gener-
DANGER
and Operating Controls
CAUTION
If the OIL PRES-
CAUTION