Vanair 050817, Руководство по эксплуатации и список запасных частей

Страница: 99 / 184

AIR N ARC
®
200 SERIES ALL-IN-ONE POWER SYSTEM
®
SECTION 6: MAINTENANCE
090019-OP_r0 PAGE - 77
the tank falls below this pressure the compressor is
allowed to start pumping.
The Cut-out pressure is defined as the pressure in
which the compressor stops pumping. When the
pressure in the air tank rises above this pressure the
compressor is signaled to stop pumping.
Pressure settings for both the minimum and maximum
rated capacity levels for this machine are adjusted at the
factory before shipping, and should not need to be
adjusted. However, a situation may occur where it is
necessary to manually adjust or reset either or both of
these settings. For such cases, consult the following
procedure.
Refer to Figure 6-8 . Locate the pilot valve left on the
base frame, near the engine, and use the following
procedure to make adjustments.
1. With a marker or scoring object, make a
corresponding mark [ F ] on the pressure
adjustment screw [ B ], pressure differential
adjustment nut [ D ], and the valve body [ E ] for
referential purposes.
2. With the machine off, loosen the locknut [ C ],
and adjust the pressure adjustment nut
clockwise (in) to raise the cut-in/cut-out
pressure, and counter-clockwise (out) to
lower the cut-in/cut-out pressure. Using the
reference mark made in Step #1, adjust the
pressure adjustment nut by a 1/4 - 1/2 turn
interval, and tighten the locknut.
3. Start the engine and check the air pressure
gauge reading after the engine has returned
to idle speed.
4. Repeat Steps #2 and #3 if further adjustment
is needed.
6.5.6 ADJUSTING THE ENGINE SPEED
Consult the Vanair
®
Service Department for issues
relating to adjustment of engine speed.
NOTE
DO NOT adjust the factory set pressure
differential adjustment nut. Reference
the mark made on the pressure variation
adjustment nut, and the valve body to
insure that it has not changed position.
KEY DESCRIPTION
A MANUAL ADJUSTMENT VALVE
B CUT-IN / CUT-OUT PRESSURE
ADJUSTMENT SCREW
C LOCKNUT
D PRESSURE DIFFERENTIAL NUT
E VALVE BODY
F Marking a reference line
Figure 6-8: Pilot Valve Adjustment
A
B
C
D
E
F
WARNING
Relieve pressure from the compressor
system before performing maintenance
on any components.
IMPORTANT
The pressure setting is pre-set to the
maximum capability of the machine at
the factory.