13
DEFROSTING & CLEANING
The moisture in the air, which enters the ILR due to lid
opening (and also may be due to defective lid-gasket
or door alignment) is attracted by the cold surfaces
inside the ILR. So, formation of frost and ice occurs
on the walls around the tubes inside the lining
compartment. When the frost layer is 1 /4" to 1 /2"
(6-12 mm) thick, it is time for `defrosting' the ILR.
MOST IMPORTANT:
Before defrosting the ILR, the vaccines preserved in it
will have to be removed and stored temporarily in
other working ILR or Refrigerator.
If a second ILR or Refrigerator is not available, the
vaccines will have to be preserved in Cold-Box or
Vaccine carrier, properly lining the same with frozen
ice packs, such that the vaccine temperature remains
within the recommended storage temperature during
the defrosting of the ILR.
DEFROSTING & CLEANING
PROCEDURE
1.
When the frost formation around the evaporator is 6 to
10 mm thick, it is time for Defrosting".
2.
Prepare the temporary storage and transfer the
vaccines to another refrigerator or cold box.
3.
Unplug the unit and open the lid for minimum 24 hours
so that all the ice around the evaporator and the ice
bank can melt.
4.
Open the drainage plug at the bottom, inside the
cabinet.
Keep a suitable container under the drain hose to
collect the defrost water. (fig. 19)
5. DEFROSTING & CLEANING
Fig. 19.
Содержание TCW 1990
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