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Maintenance and Repair
4.15
Remote Flow Restrictor
Maintenance
(Model OP250 only)
WARNING!
Ensure that the dryer is de-energized, valve isolated,
and fully depressurized before attempting to remove
or disassemble any dryer component or subassembly.
Failure to do so may result in serious personal injury
and/or equipment damage.
1.
Remove muffler as follows:
a) Provide adequate support for muffler and flow
restrictor assembly. Remove flow restrictor as-
sembly from lower flange by equally loosening
flange bolts. Ensure that the method of support
is prepared to accept the muffler and flow
restrictor's full weight when the last bolt is re-
moved (see following CAUTION).
CAUTION: Exercise caution when lowering muf-
fler and flow restrictor to prevent damaging control
tubing and the Purge Pressure Indicator.
2.
Remove, clean and inspect the "spring and orifice-
type" flow restrictor. Install a new flow restrictor if
damage is noted.
IMPORTANT: When installing Flow Restrictor, its
springs must be fully seated in the spring receptacle.
This must be accomplished for proper operation.
3.
Reinstall muffler and flow restrictor assembly in the
reverse order of removal.
Figure 4.12