Specifications

96
4. Rotate the guide vane sprocket fully clockwise and
spot-drill the guide vane actuator shaft. Spot-drilling is
necessary when the guide vane actuator sprocket set
screws on the guide vane actuator shaft need to be
re-seated. (Remember: Spot-drill and tighten the first set
screw before spot-drilling for the second set screw.)
Trim Refrigerant Charge — If, to obtain optimal chill-
er performance, it becomes necessary to adjust the refrigerant
charge, operate the chiller at design load and then add or re-
move refrigerant slowly until the difference between the leav-
ing chilled water temperature and the cooler refrigerant tem-
perature reaches design conditions or becomes a minimum. Do
not overcharge.
Refrigerant may be added either through the storage tank or
directly into the chiller as described in the Charge Refrigerant
into Chiller section.
To remove any excess refrigerant, follow the procedure in
Transfer Refrigerant from Chiller to Pumpout Storage Tank
section, Steps 1a and b, page 70.
WEEKLY MAINTENANCE
Check the Lubrication System —
Mark the oil lev-
el on the reservoir sight glass, and observe the level each week
while the chiller is shut down.
If the level goes below the lower sight glass, check the oil
reclaim system for proper operation. If additional oil is re-
quired, add it through the oil drain charging valve (Fig. 2). A
pump is required when adding oil against refrigerant pressure.
The oil charge for the 19XR compressor depends on the com-
pressor Frame size:
• Frame 2 compressor — 8 gal (30 L)
• Frame 3 compressor — 8 gal (30 L)
• Frame 4 compressor — 10 gal (37.8 L)
• Frame 4 compressor with split ring diffuser option —
12 gal (45.0 L)
• Frame 5 compressor — 18 gal (67.8 L)
The added oil must meet Carrier specifications for the
19XR. Refer to Changing Oil Filter and Oil Changes section
on page 97. Any additional oil that is added should be logged
by noting the amount and date. Any oil that is added due to oil
loss that is not related to service will eventually return to the
sump. It must be removed when the level is high.
An oil heater is controlled by the PIC II to maintain oil tem-
perature (see the Controls section) when the compressor is off.
The ICVC COMPRESS screen displays whether the heater is
energized or not. The heater is energized if the OIL HEATER
RELAY parameter reads ON. If the PIC II shows that the heater
is energized and if the sump is still not heating up, the power to
the oil heater may be off or the oil level may be too low. Check
the oil level, the oil heater contactor voltage, and oil heater re-
sistance.
The PIC II does not permit compressor start-up if the oil
temperature is too low. The PIC II continues with start-up only
after the temperature is within allowable limits.
SCHEDULED MAINTENANCE
Establish a regular maintenance schedule based on your ac-
tual chiller requirements such as chiller load, run hours, and
water quality. The time intervals listed in this section are of-
fered as guides to service only.
Service Ontime — The ICVC will display a SERVICE
ONTIME value on the MAINSTAT screen. This value should
be reset to zero by the service person or the operator each time
major service work is completed so that the time between ser-
vice can be viewed and tracked.
Inspect the Control Panel — Maintenance consists of
general cleaning and tightening of connections. Vacuum the
cabinet to eliminate dust build-up. If the chiller control mal-
functions, refer to the Troubleshooting Guide section for con-
trol checks and adjustments.
CHAIN
GUARD
DRIVE
CHAIN
GUIDE VANE
ACTUATOR
SPROCKET
SET
SCREWS
GUIDE VANE
ACTUATOR
SUCTION
HOUSING
GUIDE VANE
ACTUATOR
SHAFT
ACTUATOR
BRACKET
HOLDDOWN
BOLTS (3)
GUIDE VANE
SHAFT
GUIDE VANE
SPROCKET
O
P
E
N
C
L
O
S
E
Fig. 49 — Guide Vane Actuator Linkage
a19-1731
CAUTION
Ensure power to the VFD is isolated when cleaning and
tightening connections inside the VFD enclosure. Failure
to disconnect power could result in electrocution. The oil
filter housing is at a high pressure. Relieve this pressure
slowly. Failure to do so could result in serious personal
injury.