Remote Set Point Assembly Replacement; Replacing Remote Set Point Parts; Pivot Assembly A (Key 114) - Emerson Fisher 4194HA Instruction Manual

Instruction Manual
D200156X012

Remote Set Point Assembly Replacement

Use the following procedures to replace the remote set point assembly. Refer to figure 6‐3 for key number locations.
Note
Remove the supply pressure gauge before attempting to remove the remote set point capsular element assembly.
1. Decrease the remote set point pressure to 0 psig.
2. Remove the supply pressure gauge.
3. Remove the pressure connection (key 93) at the pedestal assembly (key 105). Use two 5/16‐inch wrenches.
4. Disconnect link B (key 126) from the connection hole on the set point adjustment assembly.
5. Remove the three mounting screws (keys 120 and 140) holding the remote set point assembly to the process/set
point indicator assembly. See figure 3‐2 for the location of the screws.
CAUTION
In the following step, do not lift out the remote set point capsular element assembly by holding the capsule or linkages.
These parts may be damaged.
6. Lift out the capsular element assembly by holding the plate (key 111), travel stop (key 83), or pedestal assembly
(key 105).
7. Align the replacement assembly with the mounting screw holes. Replace the mounting screws.
8. Reconnect the remote set point pressure connection union (key 93). Apply full remote set point pressure and check
for leaks.
9. Connect link B (key 126) to the connecting hole on the set point indicator assembly.
10. Replace the supply pressure gauge.
11. Perform the remote set point maintenance calibration procedure in this section. Also, perform the appropriate
controller calibration procedure in Section 3 or 4.

Replacing Remote Set Point Parts

Pivot Assembly A (Key 114)

CAUTION
Avoid bending or kinking the drive flexure during this procedure. Bending or kinking the drive flexure can result in product
damage and impaired performance.
1. Decrease the remote set point pressure to 0 psig.
2. Remove the two screws (key 103) from the tie bar (key 106) and remove the tie bar.
4194HA, HB, HC Controllers
July 2018
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