Process Technology LUFRAN Instruction page 83

Maintenance Procedures (Continued):
Procedure M6-2: PRV Replacement Procedure:
1) If the unit is in LOCAL mode, press the DISABLE HEATER button on the command
panel of the OIP. If the unit is in REMOTE mode disable the heater from the
customer supplied remote controller. Press the POWER OFF button on the front of
the unit.
2) Continue water flow through the unit and allow it to cool to ambient temperature.
Shut off power to the unit.
3) STOP flow of water to the unit. Drain the unit. A provision for draining the unit must
be installed on the inlet plumbing when the unit is installed.
4) Once the system is drained, open the rear cabinet door. The PRV is attached to the
TEE on the inlet plumbing.
5) Disconnect the ½-inch fluoropolymer discharge tube by loosening and removing the
compression fitting on the PRV.
6) Unscrew and remove the PRV by turning the PRV body counter-clockwise.
7) Replace the O-Ring located in the inlet manifold for any damage.
8) Screw the new PRV into the inlet manifold connector.
Caution: Do not disturb the setting of the gray pvc adjustment cap. Do not over-tighten
the compression fitting.
9) Re-connect the ½-inch discharge tubing to the PRV.
10) Start flow of water to the unit and check for leaks.
11) Close the rear cabinet door.
M-43-01
Revision - Date: 08 – 04/06/15
Verify that the electrical supply and water
supply is shut
lockout/tagout devices are properly installed.
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off, and any necessary
Lufran Single Outlet Manual