JOHNSON CONTROLS
14
FORM 50.40-OM1 (713)
ISSUE DATE: 07/17/2013
SECTION 2 - OPERATION
the RSR compressor and oil separator will have to
be changed when changing from other refrigerants to
R-134a and when chang ing back from R-134a to other
refrigerants.
See the
SECTION 4 - MAINTENANCE PROCE-
of this manual for the correct procedure for
adding and removing oil from the RSR unit compres-
sor and oil separator.
Check Oil Level in Vacuum Pump (Low Pressure
Units)
The oil level in the vacuum pump should be at the mid-
point of the oil level window.
Unlike the high pressure units, the oil in the vacuum
pump is not the same as that used in the refrigeration
unit being serviced. A special vacuum pump oil must
be used.
Vacuum pumps are tested with DuoSeal® brand oil
and shipped with a full charge to prevent unnecessary
contamin ation. The oil acts both as a lubricant and the
vacuum seal between the rotating components. An
additional supply of oil is furnished with each pump
with instructions to drain and discard the oil, when it
becomes contaminated, and replace with the fresh oil.
DuoSeal oil has been especially prepared and is ideally
suited for use in vacuum pumps be cause of its desir-
able viscosity, low vapor pressure and chemical stabil-
ity. The vacuum guarantee on all pumps applies only
when Duoseal oil is used.
Oil Contamination
The most common cause of a loss in efficiency in a
vacuum pump is contamination of oil. It is caused by
condensation of vapors and by foreign particles. The
undesirable conden sate emulsifies with the oil which
is recirculated and sub jected to re-evaporation during
the normal cycle of pump activity thus reducing the
ultimate vacuum attainable. Some foreign particles and
vapors may form sludges with the oil, impair sealing
and lubrication and cause eventual seizure. Periodic oil
changes are necessary to maintain efficient opera tion
of the system. The required frequency of changes will
vary with the particular system. Experience with the
pro cess will help you determine the normal period of
operation before an oil change is required.
See
SECTION 4 - MAINTENANCE PROCEDURES
for Low Pressure Units for the correct procedure to add
or remove oil from the vacuum pump and oil separator.
Filter Dryer Replacement Element
The RSR unit contains a filter dryer that removes
moisture, acids, as well as solid particles from the re-
frigerant that is being recovered. The filter dryer con-
tains a removable element (Sporlan #RC 4864) that
must be in place before the unit is used.
The filter/dryer element must also be changed when:
1. Changing the type of refrigerant being recov-
ered.
2. When the liquid sight glass indicator shows that
excessive moisture is in the refrigerant.
3. After recovering refrigerant from a refrigeration
unit that has had a motor burnout.
4. After the RSR unit has been run for 100 hours.
If the refrigeration unit, from which the refrigerant
is being recovered, has experienced a hermetic com-
pressor motor burn out, or if the liquid sight glass/
moisture indicator shows excessive moisture in the
refrigerant, a filter/dryer (Sporlan C-415) should be
inserted at the end of the RSR liquid re frigerant hose ,
where it connects to the refrigeration unit liquid con-
nection.
Before the refrigeration unit is re charged, the valve
at the end of the liquid hose and on the refrigeration
unit (at the opposite end of the filter dryer) should be
closed. Remove the fllter dryer and re place it with a
new filter dryer with the arrow pointing in the direc-
tion of the re frigeration unit.
The arrow indicating direction of flow
should point toward the RSR unit when
liquid refrigerant moves from the refrig
eration unit to the RSR storage vessel.
See
SECTION 4 - MAINTENANCE PROCEDURES
for specific instructions for changing the filter/dryer
element.
Connecting Hoses
The refrigerant hoses, furnished with the RSR unit,
are con nected to the evaporator and condenser of the
refrigeration. unit as shown in the schematic diagram
. A third hose, used
with the portable unit only, is connected between the
valve on the top of the storage vessel and the refriger-
ant connection on the condenser of the portable RSR
unit.
Содержание YORK EASYTANK LD17584
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