Oil Specification; Oil Changes; To Change The Oil; Refrigerant Filter - Carrier AquaEdge 19XRV series Operation, Maintenance And Installation Manual

8. Rotate the assembly so that the Schraeder drain valve is
oriented at the bottom, and tighten the connection nut on
each end to a torque of approximately 30 ft-lb (41 N-m).
CAUTION
The oil filter housing is at a high pressure. Relieve this
pressure slowly. Failure to do so could result in serious per-
sonal injury.
9. Evacuate the filter housing by placing a vacuum pump on
the charging valve. Follow the normal evacuation proce-
dures. Shut the charging valve when done and reconnect
the valve so that new oil can be pumped into the filter
housing. Fill with the same amount that was removed;
then close the charging valve.
10. Remove the hose from the charging valve, open the isola-
tion valves to the filter housing, and turn on the power to
the pump and the motor.
If oil is added, it must meet the fol-
Oil Specification —
lowing Carrier specifications:
Oil Type for units using R-134a . . . . . . . . . . . . . . . . . .Inhibited
ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
The polyolester-based oil (P/N: PP23BZ103) may be
ordered from a local Carrier representative.
Carrier recommends that a yearly oil
Oil Changes —
analysis be performed to determine when to change oil and
when to perform a compressor inspection. However, if yearly
analysis is not performed or available, the time between oil
changes should be no longer than 5 years.

TO CHANGE THE OIL

1. Transfer the refrigerant into the chiller condenser vessel
(for isolatable vessels) or to a pumpout storage tank.
2. Mark the existing oil level.
3. Open the control and oil heater circuit breaker.
4. When the chiller pressure is 5 psig (34 kPa) or less, drain
the oil reservoir by opening the oil charging valve
(Fig. 2 and 3). Slowly open the valve against refrigerant
pressure.
5. Change the oil filter at this time. See Changing Oil Filter
section.
6. Change the refrigerant filter at this time, see the next
section, Refrigerant Filter.
7. Charge the chiller with oil. Charge until the oil level is
equal to the oil level marked in Step 2. Turn on the power
to the oil heater and let the PIC III warm it up to at least
140 F (60 C). Operate the oil pump manually, using the
Control Test function, for 2 minutes. For shutdown condi-
tions, the oil level should be full in the lower sight glass.
If the oil level is above
remove the excess oil. The oil level should now be equal
to the previous oil level's mark (Step 2).
A refrigerant filter/drier, located on
Refrigerant Filter —
the refrigerant cooling line to the motor, should be changed
once every five years when the machine is opened for service.
This filter does not contain dessicant for moisture removal, so
changing it will not change the moisture indicator status.
Change the filter by closing the filter isolation valves (see Fig.
4 and 5) and slowly opening the flare fittings with a wrench
and back-up wrench to relieve the pressure. A moisture indica-
tor sight glass is located beyond this filter to indicate the
polyolester-based synthetic
compressor oil formatted for
use with HFC, gear-driven,
hermetic compressors.
1 / full in the upper sight glass,
2
volume and moisture in the refrigerant. If the moisture indica-
tor indicates moisture, locate the source of water immediately
by performing a thorough leak check.
Oil Reclaim Filter —
strainer on the eductor suction line, a strainer on the discharge
pressure line, and a filter on the cooler scavenging line.
Replace the filter once every 5 years or when the machine is
opened for service. This filter does not contain dessicant for
moisture removal, so changing the filter will not change the
moisture indicator status. Change the filter by closing the filter
isolation valves and slowly opening the flare fitting with a
wrench and back-up wrench to relieve the pressure. Change the
strainers once every 5 years or whenever refrigerant is evacuat-
ed from the cooler.
VFD Refrigerant Strainer —
located in the 5 / in. line that supplies refrigerant to the VFD.
8
The strainer should be replaced once a year or more often if the
strainer condition indicates a need for more frequent replace-
ment. Change the filter by closing the refrigerant cooling line
isolation valves. Refrigerant pressure can be relieved through
access valves on the strainer housing. Tighten
to 55 to 66 ft-lb (75 to 89 Nm).
Inspect Refrigerant Float System —
inspection every 5 years or when the condenser is opened for
service.
1. Transfer the refrigerant into the cooler vessel or into a
pumpout storage tank.
2. Remove the float access cover.
3. Clean the chamber and valve assembly thoroughly. Be
sure the valve moves freely. Ensure that all openings are
free of obstructions.
4. Examine the cover gasket and replace if necessary.
See Fig. 51 for a view of the float valve design. Inspect the
orientation of the float slide pin. It must be pointed toward the
bubbler tube for proper operation.
LEGEND
1 — Refrigerant Inlet from FLASC Chamber
2 — Linear Float Assembly
3 — Float Screen
4 — Bubbler Line
5 — Float Cover
6 — Bubbler Line Connection
7 — Refrigerant Outlet to Cooler
8 — Gasket
Fig. 51 — 19XRV Float Valve Design
90
The oil reclaim system has a
A refrigerant strainer is
5 / in. flare nuts
8
Perform this
1
2
7
8
3
4
5
6
a23-1632