Vogt P18AL TUBE-ICE, Service Manual

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P18AL Service Manual
MAINTENANCE
3/6/07
7-7
Compressor (optional). This section is only a guide; consult the compressor manual for
manufacturers recommended maintenance.
In starting and charging the unit, the oil sight glass should be continually checked to make sure an
adequate oil level is maintained. The oil level should be 1/4-3/4 of the sight glass. If the oil level
drops below 1/4 of the glass, add refrigeration oil as per the compressor manufacturer
recommendations. Never allow the oil level to be out of sight, above or below the sight glass when
the compressor is operating.
! CAUTION !
The crankcase heater should be energized for a minimum of
four hours and the oil temperature should be 100
°
-110
°
F
before attempting to start the compressor.
! CAUTION !
During operation, the specified net oil pressure should be maintained for proper lubrication and
operation of the cylinder unloader mechanism.
Mycom N&W Series net oil pressure: 17-28 psig
Vilter 450 Series net oil pressure: 35-50 psig
Note: Net oil pressure is calculated by subtracting the compressor suction pressure from the oil
pressure gage reading while the compressor is running.
Example:
Oil pressure gage reading: 65 psig
Suction pressure gage reading: 40 psig
Net Oil Pressure: 25 psig
The compressor oil should be changed at close intervals during initial break-in operation and up to
the first 1000 hours (see Table 7-4 below).
Note: It is the owner’s responsibility to make sure normal maintenance is initiated to insure that the
compressor is not subjected to premature wear or failure due to neglect or lack of sufficient
maintenance and care.
Frequency
Maintenance Operation
1st 2nd 3rd 4th Thereafter
Change oil 200 hr. 500 hr. 1500 hr. 4000 hr. Every 4000 hrs.
Clean suction strainer
cloth
200 hr. 500 hr. Remove if clogging is minimal
TABLE 7-4
Compressor Maintenance
The above maintenance is only a guide. The compressor should be inspected anytime there is
unusual noise, damage is suspected or the oil becomes discolored. The oil should be changed any
time the compressor is opened. For specific recommendations and instructions, refer to the
particular compressor manufacturer’s manual.