NOTICE:
Set the cold (ambient) impeller clearance according to this table. Failure to do so may result in
heat generation and equipment damage. Higher clearances are used above 93°C | 200°F to
prevent the impeller from contacting the casing due to thermal expansion.
WARNING:
•
Risk of mechanical seal damage leading to breach of containment. If a cartridge mechani-
cal seal is used, ensure that the set screws in the seal locking ring are loosened and that
the centering clips have been installed prior to clearance adjustment.
Impeller clearance methods
You can set the impeller clearance with either of these methods:
•
Dial indicator method
•
Feeler gauge method
101
Back Clearance
Front Clearance
100A
822
356B 357B
122
561
Figure 31: Impeller clearance measurement
5.5.1 Set the impeller clearance - dial indicator method (CV 3196 only)
Before you can begin this procedure, you must lock out the driver power and then remove the coupling
guard according to the instructions in this manual.
WARNING:
Failure to disconnect and lock out driver power may result in serious physical injury or death.
Always disconnect and lock out power to the driver before performing any installation or main-
tenance tasks.
•
Electrical connections must be made by certified electricians in compliance with all inter-
national, national, state, and local rules.
•
Refer to driver/coupling/gear manufacturer's installation and operation manuals (IOM) for
specific instructions and recommendations.
5.5 Impeller-clearance setting
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual
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