Gardner Denver VST55-90B, Руководство по эксплуатации и обслуживанию

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13-17-618 Page 47
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3. If the unit is not elevated high enough to use the oil reservoir drain line to drain oil, a small hand,
electric or air operated pump should be used to drain reservoir through the oil filler opening or from
the drain valve.
4.
If the unit is elevated so that the oil reservoir drain can be used, empty the oil reservoir through the
drain valve to a suitable container or sump.
5.
If the drained oil and/or the oil filter element are contaminated with dirt, flush the entire system,
reservoir, oil cooler, mixing valve and lines. Inspect the oil separator element for dirt accumulation;
replace if necessary. If a varnish deposit exists, contact the factory for recommendations for
removal of the deposit and prevention of varnish.
REFILLING OIL SYSTEM
- The steps to refill the drained oil system are the same as those already
presented for the addition of oil between changes
– see page 46, for full details. The only exception is
that to fill all the empty lines and components (e.g., oil cooler, compressors, and oil filter) a much larger
volume of oil will be required.
The VST55-90A package requires nearly 16 gallons of AEON 9000TH Synthetic Lubricating Coolant to fill
all the lines and components. The provided sight glass has a working height of 4
”, which represent a
change of 3.3 gallons between its bottom edge (refill level) to its upper edge (max fill level).
COMPRESSOR OIL FILTER - The oil filter is a vital part in maintaining a trouble-free compressor, since it
removes dirt and abrasives from the circulated oil. It should be replaced every 1000 hours of operation
and when the oil is changed.
An internal flow bypass valve, mounted inside the filter housing, provides uninterrupted oil flow when the
filter element is contaminated and its pressure loss exceeds 15 psid (at typical operating conditions of
140

F and 100 psi). However, since this condition introduces unfiltered, potentially contaminated oil into
the compressor, it is best avoided by following the recommended filter replacement intervals.
Improper oil filter maintenance will cause damage to equipment. Replace filter
element every 1000 hours of operation. More frequent replacement could be
required depending on operating conditions. A filter element left in service too
long may damage equipment.
The filter media is contained within an easily replaced, spin-on cartridge. Use the following procedure to
replace the filter. Do not disturb the piping:
1. Be sure the unit is completely off and that the oil reservoir is depressurized.
2. Disconnect lockout and tagout the power supply to the compressor package.
3. Unscrew the cartridge with adequate tool (e.g., strap wrench) and remove.
4. Clean (wipe) and lubricate sealing surface on filter housing with grease.
5. Lubricate o-ring seal on new element with grease.
6. Screw-new element onto filter head firmly
– approximately 3/4 turns after cartridge and head make
contact.
7. After compressor is started and pressurized, inspect housing-to-element joint for leaks.