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Section 4
Service
Heater Element Circuit
Tune the Cabinet
Service the Drive Belt
4-6
Orbital Shaker
Breaker
Warning Only qualified service personnel should perform this procedure.
Warning Remove and lock-out electrical power when working on or near
the relay control tray and heating element connectors. Allow sufficient time
for the heating elements to cool before
reaching into that area.
A manual reset circuit breaker is located
between the heating element electrical
connectors on the side of the air plenum.
(Figures 4-7 and 4-8) The breaker can be
reset by removing the front grille and
reaching over the relay tray.
After the console cabinet is in place and leveled, with the platform installed,
turn the unit on and set the speed to 300RPM. Kneeling in front of the
console, lightly touch the lower left and right corners of the cabinet. If one
side seems to vibrate more than the other, raise or lower the corner support
leg using the 3/4" open end wrench supplied in the parts bag. Continue this
"fine tuning" until the vibrations are reduced as much as possible.
Figure 4-9. Front View of Cabinet with Grille Removed
The motor drive pulley, large mechanism
pulley, belt and motor mounting bolts are
visible after removing the grille and
belt/pulley tray (Figures 4-9 and 4-10).
Loosening the three 7/16" bolts at the base
of the drive motor allows the belt to be
changed or tension applied to the belt.
Tighten the three bolts and torque to 10 ft. lbs.
s
Reset Button
Figure 4-8. Connectors and Reset
Figure 4-10. Drive Belt
s
Heating Element
Connectors
Thermo Scientific
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