Removing Compressor Oil - Trane AdaptiR RTHD Installation Operation & Maintenance

Maintenance Procedures
Figure 70. Determining Oil Level in Sump
3. Attach a 3/8" or 1/2" hose with a sightglass in the middle to the oil sump drain valve and the
4. After the unit is off line for 10 minutes, move the sightglass along the side of the oil sump.
5. The level should be between 2" and 5" from the bottom of the oil sump. If the level appears
6. If the level is below 2", there is not enough oil in the sump. This can occur from not enough
Note: If the oil is logged in the evaporator confirm the operation of the gas pump. If the gas
7. After the level is determined, close the service valves and remove the hose/sightglass assem-

Removing Compressor Oil

The oil in the compressor oil sump is under a constant positive pressure at ambient temperature.
To remove oil, open the service valve located on the bottom of the oil sump and drain the oil into
a suitable container using the procedure outlined below:
POE Oil!
Due to the hygroscopic properties of the POE oil, all oil must be stored in metal containers. The
oil will absorb water if stored in a plastic container.
Oil should not be removed until the refrigerant is isolated or removed.
8. Connect a line to the oil sump drain valve.
9. Open the valve and allow the desired amount of oil to flow into the container and close the
10. Measure the exact amount of oil removed from the unit.
122
Sightglass
condenser service valve at the top of the condenser.
Using high pressure rated clear hose with appropriate fittings can help speed up the process.
to be above 8", the oil sump is completely full. Most likely more oil resides in the rest of the
system and some oil needs to be removed until the level falls between 2" and 5" in the oil
sump.
oil in the system or more likely, oil migration to the evaporator. Oil migration can occur from
a low refrigerant charge, gas pump malfunction, etc.
pump is not functioning properly all oil will be logged in the evaporator.
bly.
charging valve.
D CAUTION
3/8" or 1/2" Hose
RTHD-SVX04K-EN