Inspection and Maintenance
8-6
750-368
CBEX Elite 100-1200 HP
Dust and dirt can cause excessive wear and overheating of motor starter and relay contacts. Use a burnishing
tool or a hard surface paper to clean and polish contacts. Starter contacts are plated with silver and are not
harmed by discoloration and slight pitting. Replacement of the contacts is necessary only if the silver has worn
thin.
Thermal relay units (overloads) are of the melting-alloy type and, when tripped, the alloy must be given time to
re-solidify before relay can be reset. If the overloads trip out repeatedly when the motor current is normal,
replace them with new overloads. If the condition continues after replacement, it will be necessary to determine
the cause of excessive current draw at the overloads.
Power supply to the boiler must be protected with dual element fuses (Fusetrons®) or circuit breakers. Similar
fuses should be used in branch circuits. Standard one-shot fuses are not recommended. Information given below
is included for guidance to fuse requirements.
Do not use files or abrasive materials such as sandpaper on the contact points. Failure to follow these instructions
could result in equipment damage.
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