Spencer 4BOB Multistage Centrifugal Blowers - Manual (Page 18)

1188
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(cont.)
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• Packing box(es) too tight, too loose, wrong Adjust, relubricate or replace packing; align box(es).
packing, packing dried or worn out, out of
alignment.
• Mechanical seals misaligned, broken or Realign or replace seals or parts.
worn out.
• Solids or liquids passing through machine. Disassemble, inspect and clean machine; install inlet
filter to prevent further contamination.
• Soft foot on motor or blower. See page 5.
• Machine in surge (see page 8). Increase airflow.
• Stacked impeller hub nuts too tight. Loosen hub nuts 1/2 turn.
• Belts on belt drive machine loose, slapping. Tighten belts to proper tension.
• Harmonic pulsation from gasoline Change engine speed to remove pulsation.
engine driver.
• Machine not on solid foundation. Reinforce foundation.
M MO OTTO ORR HHO OTT ((CChheecckk wwiitthh ssuurrffaaccee tthheerrm moom meetteerr;; ccoonnssuulltt SSppeenncceerr SSeerrvviiccee DDeeppaarrttm meenntt ffoorr aassssiissttaannccee))
• Ambient temperature too high for insu- Cool motor or replace with motor having proper insulation.
lation class.
• Incorrect voltage. Change to correct voltage.
• Incorrect cycle. Change to correct cycle.
• Electrical short-circuit insulation failure. Repair or replace motor.
• Motor overloaded, too much air Check for system leaks, throttle back butterfly valve,
passing through blower. install larger motor.
• Unbalanced voltage supply (gas boosters Check power company for correction.
only).
M MAACCHHIINNEE
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