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INSTALLATION
Manual:
1.
Loosen jam nut (09B-6).
2.
Turn the adjusting screw (09-5A) (clockwise to increase pressure - counterclockwise to
decrease pressure) until the reading on the pump discharge line pressure gauge is the same
as the predetermined maximum line rating - then retighten jam nut (09B-6).
Pneumatic:*
When back pressure is regulated by pneumatic control, the spring inside the relief cover must be
removed prior to the operation. To remove spring it is necessary to remove relief cover parts in
the following sequence:
1.
Jam nut (09B-6).
2.
Clamp (13MON-X-S).
3.
Cap nut (09B-3A).
4.
Retaining ring (09B-13).
*
For PR300 replace cap nut (09B-3A), adjusting screw (09B-13) and jam nut (09B-6) with
R3-1-09D-3 cap.
Reassemble relief cover omitting retaining ring (09B-13) and spring (09B-4) and follow instructions
below for pneumatic operation:
1.
Loosen jam nut (09B-6).
2.
Turn the adjusting screw (09B-5A) counterclockwise until o-ring (09B-14) is slightly
compressed, then retighten jam nut (09B-6).
3.
Adjust pressure control valve at the source of supply (air or CO
2
) until the reading of the
discharge line pressure gauge is the same as the predetermined maximum line pressure
rating.
