Cashco 9540R P/P - Manual (Page 9)

IOM-9540R 9
IV. BASIC ADJUSTMENTS/SETTINGS
A. Required Tools:
The following tools are required for the basic
adjustment:
1. Screwdriver
2. Open-end wrench - 6 mm
3. Feeler gauge 0.6 mm (.24 in)
4. Two test gauges - 30 psig (for 20 psig max
bench range); One test gauge - 30 psig, and
one test gauge - 60 psig (for 30 psig max
bench range)
5. Manual loader/airset
6. Open-end wrench - 10 mm
7. Needle nose pliers; small
8. #5 Allen wrench (5 mm) (provided)
B. Manual Bypass Setting: (See Figure 16)
1. There are two positions for the pneumatic
bypass switch (3) to be in:
“EIN” - Positioner is active (ON); this is the
factory set position.
“AUS” - Positioner is inactive (OFF), and the
input “SIG” is passed directly to the actuator,
bypassing the positioner internals.
2. “EIN” or “AUS” are labels cast into the base-
plate (BP). To bypass, loosen the bypass
screw (2) CCW to release the bypass switch’s
(3) rotor; two full revolutions of the bypass
screw (2) will be required. Rotate the bypass
switch (3) CW 90
°
to move to bypass (AUS);
rotate CCW to activate the positioner (EIN).
The bypass switch (3) has a rib on its outer
edge that indicates the position of the bypass
switch (3). When adjustments are completed,
retighten bypass screw (2). DO NOT LEAVE
AT AN INTERMEDIATE POSITION; PLACE
AT “EIN” OR “AUS” ONLY.
NOTE: For picture clarity, all photographs
hereafter have the two internal gauges re-
moved.
C. Action Setting:
1. Refer to Table 2 to see the graphical indicated
position of the changeover plate (15). The
indicator arrow is located on the edge of the
baseplate (BP). There are two positions this
pneumatic switch (3) can be in:
“N” - Direct action
“U” - Reverse action
2. The “N” and “U” are labels cast into the
surface of the changeover plate (15). If neces-
sary, to change action loosen CP screw (4) to
removal. Lift the changeover plate (15) and its
CP gasket (16) and replace them to align the
label with the arrow as desired. Replace and
re-tighten changeover plate screw (4).
3. If action of positioner unit is changed, the
characteristic cam (24) must be checked, as
re-orientation is normally required. See Sec-
tion III for proper cam (24) shape and installa-
tion orientation. See Section III for steps to
follow in proper cam (24) installation.
D. Range Spring Selection:
1. Each positioner unit is supplied with a color
coded range spring (41). Figure 7 shows the
springs; alternate identification can be made
by counting the number of coils. The range
spring (41) to be utilized is indicated in Table 3.
2. To remove/change the range spring (41) see
Figure 17; hold stroke factor lever (19) against
the travel stop pin (20) and simultaneously
hold the zero thumbscrew (39). Using needle
nose pliers, remove the end of the range
spring (41) hooked to the flapper lever (38);
then remove the opposite end. Reverse the
procedure with the new/different range spring
(41). Always make sure that the range spring’s
(41) coils are closest to the flapper lever (38).
3. After removal/change of the range spring
(41), recalibration is required. See Section V.
Figure 16
SECTION IV