Oil Specification; Oil Changes; Refrigerant Filter; Oil Reclaim Filter - Carrier AquaEdge 19XR Start-Up, Operation And Maintenance Instructions Manual

the oil filter housing. Collect the oil-refrigerant mixture
which is discharged.
6. Remove the oil filter assembly by loosening the hex nuts
on both ends of the filter assembly.
7. Insert the replacement filter assembly with the arrow on
the housing pointing away from the oil pump.
8. Rotate the assembly so that the Schrader drain valve is ori-
ented at the bottom, and tighten the connection nut on each
end to a torque of approximately 30 ft-lb (41 N-m).
WARNING
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.

Oil Specification

If oil is added, it must meet Carrier specifications. For units us-
ing R-134a, use inhibited polyolester-based synthetic compres-
sor oil formatted for use with HFC, gear-driven, hermetic com-
pressors, with ISO Viscosity Grade 68. The polyolester-based
oil (P/N: PP23BZ103) may be ordered from your local Carrier
representative.

Oil Changes

Carrier recommends that a yearly oil analysis be performed to
determine when to change oil and when to perform a compres-
sor inspection. However, if yearly analysis is not performed or
available, the time between oil changes should be no longer
than 5 years. Additionally Carrier recommends vibration mea-
surement done at regular intervals to obtain a signature of the
moving compressor parts as part of a total productive mainte-
nance (TPM) program.
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). 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 sec-
tion, 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 5 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 amount shown in Step 2.

Refrigerant Filter

A refrigerant filter/drier, located on the refrigerant cooling line
to the motor, should be changed once a year or more often if
filter condition indicates a need for more frequent replacement.
/ full in the upper sight glass,
1
2
Change the filter by closing the filter isolation valves (Fig. 2)
and slowly opening the flare fittings with a wrench and back-
up wrench to relieve the pressure. A moisture indicator sight
glass is located beyond this filter to indicate the volume and
moisture in the refrigerant. If the moisture indicator indicates
moisture, locate the source of water immediately by perform-
ing a thorough leak check.

Oil Reclaim Filter

The oil reclaim system has a 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 desiccant 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 evacuated from the cooler.

Inspect Refrigerant Float System

Perform this inspection only if the following symptoms are
seen.
• There is a simultaneous drop in cooler pressure and in-
crease in condenser pressure. This will be accompanied by
an increase in kW/Ton.
• The liquid line downstream of the float valve feels warm.
This indicates condenser gas flowing past the float. An in-
crease in kW/Ton will also occur.
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. Inspect
the orientation of the float slide pin. It must be pointed
toward the bubbler tube for proper operation.
ECONOMIZER FLOAT SYSTEM
For two-stage compressors, the economizer has a low side ball
type float system. The float refrigerant level can be observed
through the two sight glasses located on the float cover under
the condenser. See Fig. 32 for float detail. Inspect the float ev-
ery five years. Clean the chamber and the float valve assembly.
Be sure that the float moves freely and the ball bearings that
the float moves on are clean.
ECONOMIZER DAMPER VALVE
The damper valve should be inspected every 5 years or when
the condenser is opened for service. Check the economizer
damper actuator's movement and wiring.
40