Eppendorf New Brunswick -86 °C Freezers G - Manual (Page 29)

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HEF® and G -86 °C Freezers — Operating manual
7 Maintenance
7 Maintenance
7.1 Cleaning
7.1.1 Painted surfaces
All exterior paint work and inner doors should be cleaned using a solution of mild detergent in
water. Do not use abrasive cleaners or solvents.
7.1.2 Panels and shelves
The interior panels and shelves are made of stainless steel. They may be cleaned and sterilized.
7.1.3 Air intake grille and filter
The air intake grille must be cleaned regularly to keep it free from dust and debris. Under normal
conditions, clean the grille once every three months. If the area around the freezer is very dusty
or dirty, clean the grille more often.
 Brush the grille with a soft brush and, if a vacuum cleaner is available, vacuum the dust from
the grille.
7.1.4 Heated vent port
Over a period of a few weeks, depending on how often the freezer is being used, a small
mushroom of ice will form around the end of the vent port. If the vent port is allowed to become
blocked, a vacuum will be created when the door is closed. It will not be possible to open the door
or lift the lid until the vacuum has leaked away through the seal, which can take up to two hours
due to the high quality of the seals.
The vent port is located on the left-hand side of the freezers.
 If the door cannot be opened, clear the vent port by pressing the manual plunger on the
outside of the air vent.
NOTICE!
Risk of material damage
 Maintenance, adjustment and repair work should be carried out only by QUALIFIED,
EXPERIENCED personnel who have been AUTHORIZED to undertake such work by New
Brunswick Scientific or its authorized agents.
 Failure to use authorized service agents will invalidate the warranty.
NOTICE!
Risk of material damage
 Serious damage to the freezer may result if the air intake is blocked. Check that there is no
obstruction of the airflow to the freezer. The air intake filter must also be cleaned regularly.
 Remove the filter from behind the grille by turning the thumbscrews ¼ turn and opening grille
downward. The filter should be washed in warm soapy water and left to air dry before
replacing.
Hint!
There is an electrically-heated vent port in the freezer which must not be allowed to become
blocked or sealed off.
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