Barnstead International MaxQ 4000 Manual page 28

Incubated and refrigerated shakers
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O
PERATION
28
Figure 6: Defrost Timer
The defrost timer, part #270-108-00, is located on the
lower right side panel of the shaker cabinet to the right of
refrigeration power switch and is engaged whenever the
refrigeration system is turned on.
1.
Refrigeration Power Switch - Activates refrig-
eration system, I is ON, O is OFF.
2.
Defrost Time Power Status Lamp (Power) -
Timer is powered along with refrigeration sys-
tem whenever green power status lamp is lit.
3.
Defrost Status Lamp (Defrost) - Cooling coil is
being defrosted whenever yellow defrost status
lamp is ON. Hot gas is being bypassed through
the iced coil. When ice on the coil has melted,
defrost cycle ends automatically.
4.
Fan Delay Status Lamp (Fans) - During defrost
timer power-up and after defrost cycle, the cir-
culating fan is locked off for a 1-1/2 minute
delay. Green fan status lamp flashes during this
fan-delay period.

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