4195KA, KB, KC, and KS Controllers
Instruction Manual
Form 5207
April 2007
6-9
Assembly
1. Apply a suitable lubricant, such as key 318 or
equivalent, to the set point beam assembly; then
position a plastic washer (key 22) and the
proportional band adjustment knob (key 25) on the
set point beam assembly (key 23) as shown in
figure 6-3.
2. Position the retaining clip (key 26) on the three
posts on the proportional band adjustment knob.
3. Place the second plastic washer on the nozzle
assembly. Apply a suitable lubricant, such as key
317 or equivalent, to the nozzle assembly O-ring.
4. Insert the nozzle assembly (key 21) through the
set point beam assembly (key 23), the plastic
washer (key 22), the proportional band adjustment
knob (key 25), and the retaining clip (key 26) into the
cap. Align the nozzle with the tab on the proportional
band adjustment knob shown in figure 6-4; make
sure the proportional band adjustment knob engages
the flats on the nozzle assembly.
5. While holding the nozzle assembly (key 21)
against the set point beam assembly (key 23),
depress the retaining clip (key 26), and install the
E-ring (key 27) into the E-ring groove on the nozzle
assembly (key 21). Ensure that all three tabs of the
E-ring are engaged.
6. Inspect the O-ring on the relay nozzle tubing
assembly (key 18) and, if necessary, replace it.
Apply a suitable lubricant to the O-ring.
7. Install the relay nozzle tubing assembly (key 18)
into the set point beam assembly.
8. Set the proportional band adjustment between
DIRECT and REVERSE. Do this by aligning the tab
on the proportional band adjustment knob with the
hole in the set point beam assembly as shown in
figure 6-4.
9. Position the proportional band adjustment knob,
relay nozzle tubing assembly, and the set point
beam assembly on the frame. Screw the relay
nozzle tubing nut loosely into the frame manifold.
10. Insert the machine screw, with plain washer
(keys 19 and 20), through the frame and start it into
the relay nozzle tubing assembly (key 18), but do
not tighten.
W3761 / IL
TAB
HOLE
Figure 6-4. Proportional Band Adjustment Knob Setting
11. Center the nozzle on the flapper as shown in
figure 6-5 while squeezing the set point beam
assembly firmly against the relay nozzle tubing
assembly. With the nozzle centered on the flapper,
tighten the machine screw (key 19). Ensure that the
nozzle is still centered on the flapper.
12. Insert the pivot of the adjustable set point pivot
assembly (key 17) into the hole in the set point
beam assembly (key 23).
13. Insert the screw, with washer (keys 19 and 20),
through the frame (key 3) and start it into the
adjustable set point pivot assembly (key 17), but do
not tighten.
14. Squeeze the adjustable set point pivot assembly
against the set point beam assembly. Check to be
sure the nozzle is still centered on the flapper and
tighten the machine screw (key 19). If necessary,
loosen both machine screws (key 19) to allow
slightly moving the adjustable set point pivot
assembly, set point beam assembly and the relay
nozzle tubing assembly as a unit to center the
nozzle on the flapper. After centering the nozzle,
tighten the two machine screws.
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