Trane RTHD

138 RTHD-SVX01D-EN
Maintenance Procedures
CAUTION
Oil Loss!
Never operate the compressor with the sightglass service valves
opened. Severe oil loss will occur. Close the valves after checking
the oil level. The sump is above the condenser and it is possible
to drain the oil.
3. Attach a 3/8” or 1/2” hose with a sightglass in the middle to the oil sump
drain valve and the condenser service valve at the top of the condenser.
Using high pressure rated clear hose with appropriate fittings can help
speed up the process.
4. After the unit is off line for 30 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 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.
Figure 44 Determining Oil Level in Sump
Sightglass
3/8" or 1/2" Hose