Vogt P-34AL-15, Руководство по обслуживанию

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P34AL-15 & P34ALOF-15 Service Manual
7-7
MAINTENANCE
9/22/2005
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 psigThe 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
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. See “Compressor Oil Changing and Inspection”
Oil Trap. Although the compressor is equipped with an oil separator, which has an automatic
return, some oil will pass through the separator and eventually settle in the oil trap (36), which is
offset from the base of the freezer. This oil trap will have evidence of frost on its surface during the
freeze cycle and may be more pronounced at the end of a normal freeze cycle just before the harvest.
Where there is oil in the trap, there will not be frost. Where there is frost, there will not be oil.
When the trap is 1/2 to 3/4 full of oil, it should be drained.
The machine should be shutdown for at least 12 hours before attempting to drain oil from the trap.
Follow the procedure outlined in the service section, “Draining Oil Trap”.
! CAUTION !
Only qualified refrigeration service personnel familiar and
experienced in the handling and use of anhydrous ammonia (R717) should be
authorized to perform the “Draining Oil Trap” procedure.
! CAUTION !
Cutter Gear Reducer. The oil level of the gear reducer should be checked monthly or when there
is any evidence of leakage. The correct level is indicated by the pipe plug in the side of the gear
housing. The oil should run out of the hole when the plug is taken out. If low, add oil through one
of the top plugged holes. A high-grade lubricant such as Mobil 600W or SAE 140 gear oil should be
used. The oil should be changed annually. Drain the oil and flush the gear case with mineral spirits.
Drain the mineral spirits completely and refill with the proper oil.
Note: If a USDA high food grade lubricant is desired, use Chevron FM Lubricating Oil 460X.