RLC-SVX02G-E4
70
Maintenance Procedures
1. To measure the oil level, use the
oil drain valve on the oil line and
a service valve on the discharge
line. This measurement can only
be made when the circuit is not
running. Note: the bottom plate
of the oil separator is
approximately 1" [25 mm] thick.
2. The initial oil charge should be
approximately at the level in the
above chart. This is the
approximate oil level if all the oil
is in the oil lines, filter, and oil
sump, and the unit is in vacuum
so that there is no refrigerant
dissolved in the oil.
3. After the unit has run for a while,
the oil level in the sump can vary
greatly. However, if the unit has
run “normal” conditions for a
long time, the level should
resemble the level in the above
chart. (+1" to – 4" [25 to -101 mm]
is acceptable.)
The field-charging procedure
depends on the circumstances that
resulted in the need for oil charge.
1. Some service procedures may
result in loss of small quantities
of oil that must be replaced (oil
analysis, compressor filter
replacement, re-tubing the
evaporator, and so forth).
2. Additionally, some maintenance
procedures may result in virtually
all of the oil being removed
(compressor motor burn or total
removal of the charge to trouble
shoot a unit).
3. Finally, leaks may result in a loss
of oil that must be replaced.
Prelubrication
Prior to the oil charging procedure,
a small amount of oil shall be
injected in the port labeled "1"
(Figure 11). Oil pushed into this
location drains into the discharge
port, which allows the oil to
effectively cover the rotor end faces
and rotor tips. The only issue is that
if the schraeder valve is not present
on this port, the 7/16 o-ring boss
plug normally in this location will
have to be replaced by a 7/16-
schraeder fitting (Trane part number
VAL07306). If this part is not
available quickly, schraeder fitting 2
or 3 (Figure 11) could be removed
and put in location 1. The plug
would then replace the removed
schraeder fitting.
1. Add 7/16 schraeder port where
plug is today. (Figure 11).
2. Pull compressor and unit into
vacuum.
3. Connect oil line to port.
(Figure 12).
4. Let vacuum draw in ½ liter of oil.
Option: pump in ½ liter of oil. In
any case, never complete the
entire oil charge by this port. This
could lead to drastic damages for
the compressor. Oil injected
should be preheated.
5.Remove oil line.
1
2
3
1
Figure 11
Figure 12
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