Labconco 7061110, User Manual

Page: 57 / 72

Chapter 9: Troubleshooting
Product Service 1-800-522-7658 53
Original instructions
PROBLEM CAUSE CORRECTIVE ACTION
Contamination outside
of fume hood.
Fume hood has
improper face
velocity Have fume hood re-certified and
check remote blower exhaust
system. Hood should have
average face velocity of 60-100
fpm depending on application.
Remote blower has
excessive vibration.
Improper motor
mount. Review Chapter 2: Prerequisites
and Chapter 3: Getting Started .
The blower should be mounted on
vibration isolators or vibration
mounting pads to isolate vibration.
Inspect wheel for
damage and
appropriate
clearance. Replace damaged wheel or adjust
clearance.
Check for objects in
blower wheel
.
Remove objects in blower wheel.
Improper inlet
connection. Review Chapter 3: Getting
Started . The blower inlet should
be installed with a vibration
damper or flexible duct
connection.
Fume hood has
improper face velocity
.
Blower not sized
properly. Review Chapter 7: Modifying
Your Blower . Blower Sizing Size
the blower properly with
equivalent resistance method.
Refer to Chapters 4 and 7.
Blower requires
RPM adjustment or
a manual damper is
needed in the
exhaust ductwork. Review Chapter 3: Getting Started
Adjust the fan speed and confirm
blower performance. See Chapters
3, 4, and 7.