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2. Close liquid line isolation valve.
3. Attach hose to service port on liquid line filter flange.
4. Evacuate refrigerant from liquid line and store.
5. Depress schrader valve to equalize pressure in liquid line with atmospheric pressure.
NOTE:
Continue with the next steps unless confirmed that the pressure of liquid line equalized with atmospheric
pressure, otherwise should recover refrigerant of the whole system before next.
6. Remove bolts that retain filter flange.
WARNING - Contains Refrigerant!
System contains oil and refrigerant under high pressure. Recover refrigerant to relieve pressure
before opening the system.
Failure to follow proper procedures could result in death or serious injury or equipment damage.
7. Remove old filter element
8. Inspect replacement filter element and lubricate o-ring with Trane OIL00317.
NOTE:
Do not use mineral oil. It will contaminate the system.
9. Install new filter element in filter housing.
10. Inspect flange gasket and replace if damaged.
11. Install flange and torque bolts to 19-22 Nm (14-16 lb-ft).
12. Attach vacuum hose and evacuate liquid line.
13. Remove vacuum hose from liquid line and attach charging hose.
14. Replace stored charge in liquid line.
15. Remove charging hose.
16. Open liquid line isolation valve
Compressor Oil
CAUTION - Compressor Damage!
Use only Trane OIL00317. Failure to do so may cause compressor damage and improper unit
operation.
Trane Polyolester Oil is the approved oil for the RTXC XE units. Polyolester oil is extremely hygroscopic
meaning it readily attracts moisture. The oil can not be stored in plastic containers due to the hygroscopic
properties. As with mineral oil, if water is in the system it will react with the oil to form acids. Use
to
determine the acceptability of the oil.
Table 11 POE Oil Properties
Description
Acceptable Levels
Moisture content
less than 300 ppm
Acid Level
less than 0.5 TAN (mg KOH/g)
Replacing the Oil Filter
The filter element should be changed if the oil flow is sufficiently obstructed or oil analysis failed. Two things
can happen: first, the unit may show an “Oil Filter Change Recommended” warning message, or secondly,
