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 appropri-
ate fittings can help speed up the process.
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 bot-
tom 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.
6. If the level is below 2”, there is not enough oil in the
sump. This can occur from not enough oil in the
system or more likely, oil migration to the evapora-
tor. Oil migration can occur from a low refrigerant
charge, gas pump malfunction, etc.
Note: If the oil is logged in the evaporator confirm the
operation of the gas pump. If the gas pump is not
functioning properly all oil will be logged in the
evaporator.
7. After the level is determined, close the service valves
and remove the hose/sightglass assembly.
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:
D
CAUTION
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 isolat-
ed 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 charging
valve.
10. Measure the exact amount of oil removed from the
unit.
Oil Charging Procedure
It is critical to fill the oil lines feeding the compressor
To Next Page
Loading...
Need help?
General
