Gardner Denver APEX15-18A, Руководство по эксплуатации и обслуживанию

Страница: 41 / 70

13-25-607 Page 39
ADDITION OF OIL BETWEEN CHANGES
must be made when the oil level is below the minimum level
of the sight glass as read while the unit is completely off and blown down, and the foam has settled out.
1. Be sure the unit is completely off and that no air pressure is in the oil reservoir.
2.
Disconnect, tag and lockout the power supply to the starter.
3.
Wipe away all dirt around the oil filler plug.
4.
Remove the oil filler plug and add oil as required to return the oil level to the middle of the sight
gauge.
5.
Install oil filler plug, run and check for leaks.
DO NOT OVERFILL (you should see oil slightly above the full line after running fully loaded and then
shutting down the machine and allowing the foam to settle out). The quantity required to raise the oil
level from
“ADD” to “FULL” is shown in Figure 5 - 1, page Repeated addition of oil between oil changes
may indicate excessive oil carry-over and should be investigated.
Excessive oil carry-over can damage equipment. Never fill oil reservoir above
the “FULL” marker.
MOISTURE IN THE OIL SYSTEM –
During periods of low ambient temperatures, light duty cycles, high
humidity, or in the event of thermal mixing valve malfunction, the oil charge residing in the sump may not
reach a high enough temperature to keep water vapor from condensing as liquid water, a condition that
contaminates the oil charge, may cause excessive oil carryover, or result in compressor failure.
To help the end user determine if the compressor package is operating under potential water condensing
conditions, the charts in Figure 5 - 2 and 5-3 have been provided. To use, find the prevailing ambient
temperature along the horizontal scale of the chart, move vertically from this point until intercepting the
slanted line corresponding to the operating discharge pressure; and finally, move horizontally from this
point to read the corresponding water vapor dew point on the vertical scale. The compressor discharge
temperature must be maintained at a minimum of 10
°
F (5.5
°
C) above this dew-point temperature to
prevent condensation accumulation in the lubricant reservoir. Note that the charts conservatively assume
100% relative humidity for the ambient air.
The presence of water in the oil may be identified by one of the following means:
·
Oil drawn from the oil sampling valve attached to the sump (see Fig 1-2 on page 11).
·
Oil volume drained during an oil exchange.
·
Periodic (e.g., every 2000hrs) oil sample analyzed by a reputable laboratory.