Section 7
MAINTENANCE
39
UNLOAD pressure (110 psig [7.6 bar]). Note that
pressing the pad for over 2 seconds will initiate fast
scrolling of the value being set.
Once the correct value is selected, press the PROG
pad to proceed to the display “PRES DIF P2A. This
value is used to set the LOAD pressure where the
compressor will begin building pressure (10 PSID
[0.7 bar]). This will provide LOAD/UNLOAD opera-
tion at 100 to 110 psig [6.7 to 7.6 bar]). These val-
ues will be entered when the display is returned to
operating mode condition by continuing to press
PROG through the end of the PROGRAMMING
menu or allowing the display to automatically re-
turn to operating mode status after 5 seconds of in-
activity . While scrolling with the PROG pad, all exist-
ing user programmable values will be displayed.
FOR DIFFERENTIAL PRESSURE REGULATOR
ADJUSTMENT:
The differential pressure regulators are adjusted by
loosening the jam nut on the end of the cone
shaped cover of the pressure regulator. When the
jam nut is loose, turn the adjusting screw clockwise
to increase or counterclockwise to decrease the
setting.
Above 100 psig (6.9 bar), the spiral valve regulator
should allow pressure to flow into the chamber of
the spiral valve actuator. The spiral valve should
start to rotate at this time.
At approximately 108 psig (7.5 bar), the Sulli con
regulator should allow pressure to flow into the
control chamber of the Sullicon Control. The Sul-
licon Control level should start to move at this time.
Cycle the Control System several times and re-
check all pressure settings.
DRIVE COUPLING INSTALLATION AND
ALIGNMENT (200, 250 and 300HP/150, 187
and 225KW)
R e f e r t o F i g u r e s 7 --- 5 , 7 --- 6 a n d 7 --- 7 . F o r c o u p l i n g
installation and alignment, the tools required are a
straight edge, a measuring scale, one set of feeler
gauges, a set of standard Allen wrenches and one
set of standard socket wrenches.
WA R N I N G
!
Disconnect all power at source, before attempting
maintenance or adjustments.
F or installation and alignment of the drive coupling,
follow the steps explained below.
STEP 1 MOUNT HUBS --- Mount the motor hub
and the compressor hub onto respective shaft. Po-
sition the hubs to establish the correct gap speci-
f ied in Ta bl e 1 . S ec ur e eac h hub with a s etsc r ew.
STEP 2 OFFSET ALIGNMENT --- C l e a n a n y o i l ,
grease, dirt or paint from coupling faces and the
Figure 7 ---5 Drive Coupling (200---300HP/150---225KW)
Element P/N 046999
other surfaces of the drive flanges. Rotate shafts so
that a straight edge will rest squarely (or within the
0.010 inch maximum limit shown in Table 1) on both
flanges and at a point 90_ away. The vertical offset
alignment is adjusted by the addition or removal of
motor mounting shims. Loosen the motor mount-
ing bolts and slide the motor sideways to correct
the horizontal offset.
STEP 3 COUPLING GAP AND ANGULAR ALIGN-
MENT --- Position the hubs to establish the proper
gap and angular alignment as indicated in Table 1.
To determine the angular misalignment in inches,
measure the maximum space between the hub
flanges and the minimum space 180_ away, and
then subtract. To adjust the horizontal angular
misalignment, loosen the motor mounting bolts
and adjust the motor position until the angular
alignment is within tolerance.
WA R N I N G
!
DO NOT upset the offset alignment or hub gap
when adjusting motor position.
When within the limits specified in Table 1, tighten
the motor mounting bolts and recheck the offset
and angular alignment. If the vertical angular align-
ment is not within .010 inch tolerance, shim the
front or rear of the motor separately to correct. Re-
check the vertical offset.
STEP 4 INSTALL THE FLEXIBLE ELEMENT --- P o -
sition the motor and compressor keyways 180_
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