RTAD-SVX01F-E4
81
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 25mm
(1'') thick.
2 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 be between
25 to -100mm (+1" to - 4" )
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.
Factory (initial) Oil-
Charging Procedure
The initial charging procedure
should be followed any time the unit
is new or has had all of the oil
removed.
1 Add 1 liter oil to the motor cavity
or suction line prior to installing
the compressor into the chiller.
2 The oil-line shutoff valve must be
open to allow the oil to pass into
the oil lines and the oil separator.
3 The oil charging port is a ¼"
(6mm) flare fitting with a schrader
valve that is on the side of the oil-
filter housing. This is the port that
must be used to add oil into the
compressor so that the filter and
lines are full at the first start of the
compressor.
4 Oil may be put into the unit using
either of two methods:
CAUTION! Use only Trane Oil 00048
in the RTAD units to avoid any
catastrophic damage to the
compressor or unit.
• Have the unit in vacuum. Hook up
the oil charging hose to oil
charging fitting and submerse the
other end into the oil container. Let
the vacuum draw the required
amount of oil into the unit.
• Have the unit at the same pressure
as the oil. Hook up the oil charging
hose to the oil charging fitting and
the other end to an oil pump. Use
the pump to draw oil out of the oil
container and push the required
amount of oil into the unit.
Note: the compressor filter has an
internal shut off valve that will
prevent oil from entering the
compressor while the compressor is
not running. Therefore, there is no
concern about flooding the
compressor with oil.
