GE H301 Series Operating Manual page 78

68 | Chapter 6: Lubrication
Pressure Settings
There are two pressure relief valves (PRV's) on compressors built after December
2007): one is internal to the frame oil pump and the other is externally mounted
in the oil piping system. Compressors built prior have only the internal PRV on the
frame oil pump.
The internal PRV is set at the factory: do not use it to adjust
the frame oil pressure (unless no external PRV exists). Use the
external PRV to adjust the oil pressure.
The external PRV on the frame is adjusted to 45 –55 Psig (310 – 380 kpa) at normal
operating speed and oil temperature. Set the low oil pressure shutdown switch to
30 PSIG (205 kpa) falling pressure. The low oil pressure shut down switch gauge is
provided by the packager.
The H302 compressor's connection for the low oil pressure
switch is located on top of the front main bearing housing
(drive coupling end) just upstream from the #1 drive end
main bearing's oil supply connection. Refer to the H302
compressor's "General Arrangement" drawing for details.
oil Filtration
Oil filtration is vital for the successful operation of a compressor. In 2010 GE
upgraded the H302 series frames with improved oil filtration technology. The new
filter offers improved particle removal micron rating, greater filtration surface area,
reduced pressure drop across the filter, and improved debris-holding capacity.
The increased surface area of this filter also improves performance during cold
weather compressor start-ups when high oil viscosity can be an operational issue.
The use of non-OEM oil filter may result in compressor
See CN 11-015 for more information. Earlier frames maybe upgraded with this
filter assembly. The improvements are applicable for the following frame series:
Frames built prior to 2010
• H301
• H302
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
damage and nullify the warranty.
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)