Johnson Controls YORK RSR-4445 - Page 30

JOHNSON CONTROLS
30
FORM 50.40-OM1 (713)
ISSUE DATE: 07/17/2013
SECTION 4 - MAINTENANCE PROCEDURES
To change oil:
1. Follow steps one and two above.
2. After the refrigerant pressure has been relieved
to atmos pheric pressure, the oil is drained from
the compressor oil sump through the sump drain
valve. When the oil has drained, immediately
close the valve so that mois ture and air do not en-
ter the compressor.
3. To remove the oil from the oil separator, the
angedtopmustbeunboltedandremoved.First,
however, the ared refrigerant tube connections
must be removed from the top of the oil separator.
Besuretoonlyslightlyopenthearettingsini-
tially to make certain the refrigerant pressure has
rstbeenrelieved.Openthevalveatthebottom
of the separator and drain the oil.
4. Clean the interior with a clean cloth and remove
andcleanthescreenlter.
5. Afterreplacingthescreenlter,replacethetopof
the oil separator.
6. Before replacing the refrigerant and oil return
tubes,useapumptopumptenuidouncesofoil
into the separator.
7. Connect the oil pump to the compressor oil drain
valve – openthevalve – pumptenuidounces
of oil into the compressor sump and close the drain
valve.
8. After allowing several minutes for the oil level to
stabil ize, check to see that the oil level is 1/2 to 3/4
above the bottom of the sight glass. If not, adjust ac-
cordingly.
9. It must be emphasized that the oil used in the high
pres sure RSR compressor is the same as that used
in the refrigeration unit being serviced. Normally
YORK Type C Refrigeration oil is used except in
units charged with R-134a. An Ester base oil must
be used with this refrigerant.
10. Open the compressor suction and discharge
valves.  And next, crack the are tting on the
tube that connects the valve manifold to the oil
separator to purge air from the compressor and oil
separator.
11. Open the manifold valves as required for the next
re covery operation.
Adding or Changing Oil (Low Pressure Unit)
The procedure for the vacuum pump is essentially the
same as that for the compressor – the main excep-
tion being the use of DuoSeal vacuum pump oil in the
pump oil sump and in the oil separator.
It is recommended that the vacuum pump be flushed
with clean DuoSeal oil after draining the contaminated
oil.
Flushing the Vacuum Pump
After removing all the oil, close the drain and pour
about four ounces of clean DuoSeal oil into the oil
fill port (see exploded view drawing for your model
CAPTURE PUMP). Open the discharge port and oper-
ate the pump for about a minute with the suction port
alternately opened and closed to agitate and circulate
the fresh oil. Again stop the pump, drain the flushing
oil and force out the residue as before. The amount of
flushing oil and the number of flushes will be deter-
mined by the extent of contamination and the color of
the oil. Under no circumstances should anything other
than DuoSeal oil be used for flushing a CAPTURE
pump. The higher vapor pressures of other types of oil
will cause difficulty later in the attainment of a vacu-
um.
Refilling the Vacuum Pump
After you are satisfied that the pump has been thor-
oughly flushed, refill the pump by pouring new
DuoSeal oil into the refill port. Fill to the half way
point of the sight glass and start the pump with the
suction closed. A gurgling noise is characteristic when
high pressure air is drawn through the pump. It should
disappear quickly as the pressure within the pump is
reduced. If gurgling continues, and the oil level drops
in the sight glass, add sufficient additional oil through
the oil fill port until gurgling ceases and the oil level is
at the half way point in the sight glass.
The oil level should be checked again when the pump
reaches operating temperature. The oil separator should
be cleaned, as previously noted and refilled with 10
ounces