Fisher 4194B Series Instruction Manual page 39

E-RING
(KEY 27)
RETAINING CLIP
(KEY 26)
PROPORTIONAL
BAND ADJUSTMENT
(KEY 25)
W4193 / IL
PROPORTIONAL
BAND
ADJUSTMENT
KNOB
SET POINT BEAM
BIAS SPRING
SHOE
ADJUSTMENT
SCREWS
SET POINT
BEAM ASSEMBLY
W4194 / IL
7. While holding the proportional band adjustment
knob, remove the screw and washer (keys 19 and 20)
that hold the relay nozzle tubing assembly (key 18) to
the frame.
8. Remove the proportional band adjustment knob,
relay nozzle tubing assembly, and the set point beam
assembly from the controller.
ADJUSTABLE
SET POINT
PIVOT ASSEMBLY
(KEY 17)
SET POINT
BEAM ASSEMBLY
(KEY 23)
FLAPPER
RETAINING
CLIP
E-RING
CAP
SET POINT
BEAM SHOE
Figure 5-3. Proportional Band Adjustment and Set Point Beam Details
4194A, B, and C Series
RELAY
NOZZLE TUBING
MYLAR
CAP
ASSEMBLY
WASHER
(KEY 18)
SET POINT
BEAM SHOE
(KEY 29)
LINK 3
9. Remove the relay nozzle tubing assembly (key 18)
from the set point beam assembly (key 23).
10. Remove the E-ring (key 27) from the nozzle as-
sembly (key 21).
11. Remove the nozzle assembly (key 21) and Mylar
washer (key 22) from the bottom of the set point beam
assembly (key 23).
WASHER
(KEY 20)
SCREW
(KEY 19)
O-RING
MYLAR
WASHER
(KEY 22)
NOZZLE
ASSEMBLY
(KEY 21)
RELAY NOZZLE
TUBING ASSEMBLY
5–7