Shellab SRI21D-2 - Manual (Page 14)

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MAINTENANCE
The design of the chamber is such that periodic maintenance is kept to a minimum. NO
lubrication or adjustments of components is needed. If the incubator is used frequently at
temperatures below ambient room temperature or in any manner that increases moisture build-
up within the chamber, a frequent defrosting schedule is recommended.
6.1 Defrosting: Frost can appear inside the unit due to moisture accumulating and
condensing on the coldest surface. The unit should be defrosted and cleaned on a
regular basis. The unit can be defrosted either manually or automatically. The water
drains from the chamber into an
evaporation pan. Make sure to completely dry out the
interior when defrosting is complete.
A. Manual Defrost: Turn the unit off, open the door and allow the frost to melt. Then
clean the chamber following the directions in 6.2.
B. Automatic Defrost: the automatic defrost switch is located on the back of the unit.
It is an ON/OFF switch. In the ON position, the frost sensor is activated once every
twelve (12) hours. If the sensor detects frost, the compressor is shut down until the
frost has melted, and then the compressor is reactivated. The amount of time the
compressor is shut down is roughly one-half hour. During this time, the temperature
in the chamber will spike and the Main temperature Controller will cycle off, shutting
down the heating element. When the compressor is activated, the temperature will
stabilize at set point.
6.2 Cleaning: Clean the incubator chamber on a regular basis. Remove all interior parts
and clean thoroughly with a disinfectant that is appropriate for your application.
Shelving should be cleaned with the same solution. Special care should be taken when
cleaning around sensing heads. DO NOT USE chlorine based bleaches or abrasives as
this can damage the interior. DO NOT USE spray cleaners that might leak through
openings and cracks and get on electrical parts or that may contain solvents that will
harm coatings.
WARNING: Never clean the unit with alcohol or flammable cleaners with the unit connected to
the electrical supply. Always disconnect the unit from the electrical service when cleaning and
assure all volatile of flammable cleaners are evaporated and dry before reattaching the unit to
the power supply.
6.3 Compressor Compartment: Located at the back bottom of the unit, the compressor
compartment can collect dust which will inhibit proper air flow. This compartment should
be vacuumed out at least once every six (6) months to ensure maximum efficiency.
6.4 Electrical Components: There is NO maintenance to electrical components. If the
incubator fails to operate as specified, please review Section 7.0 Troubleshooting, prior to
calling for service.
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