Remote Air-Cooled Oil Cooler Piping; Figure 3-11. Recommended Remote Air Cooled Oil Cooler Piping - Emerson Vilter VSS Installation, Operation & Maintenance Manual

Section 3 • Installation
more than 0.002" movement at the compressor shaft.
If more than 0.002" movement is detected the piping
must be adjusted to reduce the compressor shaft move-
ment to less than 0.002". For example, the compressor
shaft should not move more than 0.002" when piping is
removed or connected to the compressor.
IMPORTANT – piping elements shall be supported per
the requirements of ASME B31.5 / B31.3 or other local
codes as applicable. See guidelines below, particularly
with concern to minimize loads on check valves.
CAUTION
Accumulated liquid in the suction header can damage
the compressor if not drained. Always drain headers
(suction and discharge headers) prior to start-ups.
Failure to comply may result in damage to equipment.
OUTLET ON TOP

Figure 3-11. Recommended Remote Air Cooled Oil Cooler Piping

3 – 14
INLET ON BOTTOM
Recommended location of
drain connections as required.
VSS/VSM/VSH/VSSH • Installation, Operation and Maintenance Manual • Emerson • 35391SD

Remote Air-Cooled Oil Cooler Piping

If equipped with a remote air cooled oil cooler, it is im-
portant that the piping be installed correctly to and from
the compressor unit and remote air cooled oil cooler:
• Outlet must be on top, inlet on bottom.
• Vertical drops should be no higher than 8 to 10 feet.
• If there is no choice and the vertical drops need to
be higher, then an electronic service valve needs
to be installed in the return line at the compressor.
Consult Factory.
• If ambient temperatures get below 50° F, heat trace
and insulation on oil lines and air cooler headers
needs to be used.
• Maximum pressure drop on oil lines to and from air
cooler and compressor should not exceed anymore
than 5 to 10 psi.