ClimaCool UCR 30, 50 and 70 tons Manual - Manual (Page 62)

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Y Type and Basket Type Strainers
Strainer Installation Instructions
1. Ensure all machined surfaces are free of defects and
that the inside of the strainer is free of foreign objects.
2. The strainer should be installed so that the drain
connection is pointed downwards.
3. For fl anged end strainers the fl ange bolting should
be tightened gradually in a back and forth clockwise
motion. Threaded end strainers should use an
appropriate sealant.
4. Once installed increase line pressure gradually and
check for leakage around joints.
5. If the strainer is supplied with a start-up screen monitor
pressure drop carefully.
IMPORTANT: Ultimate responsibility for strainer and
material selection rest with the end-user or facility
manager, as only the end-user or facility manager knows
the particular application and operating parameters to
which the strainer will be subjected.
CAUTION: PRIOR TO DISMANTLING THE STRAINER
FOR CLEANING, IT IS IMPERATIVE THAT THE STRAINER
ASSEMBLY IS ISOLATED AND COMPLETELY DE-
PRESSURIZED.
Strainer Removal Instructions
Y Type Strainers
1. Drain piping.
2. Vent line to relieve pressure.
3. Loosen fl ange bolts (fl anged ends).
4. Secure necessary lifting equipment to strainer assembly.
5. Remove inlet/outlet fl ange bolts (fl anged end), or
unthread (threaded ends) and carefully remove strainer.
6. Tighten cover. The strainer is ready for line start-up.
Basket Type Strainers
1. Drain Piping.
2. Vent line to relieve pressure.
3. Loosen cover and open to access basket.
4. Remove, clean and replace basket in original position.
(Note: In some instances a high pressure water jet or
steam may be required for eff ective cleaning).
5. Inspect cover gasket for damage. If necessary replace.
(Note: If spiral wound gaskets have been used, they
must be replaced and cannot be used again).
6. Tighten cover. The strainer is ready for line start-up.
CAUTION SHOULD BE TAKEN DUE TO POSSIBLE EMISSION
OF PROCESS MATERIAL FROM PIPING. ALWAYS ENSURE
NO LINE PRESSURE EXISTS WHEN OPENING COVER.
Maintenance Instructions
For maximum effi ciency determine the length of time it
takes for the pressure drop to double that in the clean
condition. Once the pressure drop reaches an unacceptable
value, shut down line and follow the Strainer Removal
Instructions above.
A pressure gauge installed before and after the strainer
in-line will indicate pressure loss due to clogging and may be
used to determine when cleaning is required.
Troubleshooting Guides and Diagnostic Techniques
After pressurizing inspect cover and other joints for leakage.
Gasket replacement or cover tightening is necessary if
leakage occurs. If the required fi ltration is not taking place,
ensure the screen is installed in the correct position, and
that the screen is mounted fl ush to the upper and lower
seating surfaces.