Instruction Manual

Instruction Manual
D200160X012
4195K Controllers
December 2012
104
Refer to figure 7‐7 for key number location.
1. Remove the controller assembly from the case by performing steps 1 through 3 of the case and cover replacement
procedure.
2. Loosen the spring seat screw (key 275).
3. Remove the valve plug spring (key 276) and the valve plug (key 277).
4. Inspect the parts and replace as necessary.
5. Install the valve plug spring and valve plug.
6. Tighten the spring seat screw.
7. Temporarily apply supply pressure and process pressure and check for leaks.
8. Position the controller assembly in the case and start, but do not tighten the nine mounting screws. Slide the
controller assembly down to assure an O‐ring seal at the pressure connections along the bottom of the case. Hold
the controller assembly in place while tightening the nine mounting screws.
9. Mount the controller as described in the Installation section.
10. Connect the external piping to the controller.