Permobil Chairman HD3 Owner's Manual page 39

Owner's Manual Chairman HD3
Maintenance
During all work on the electrical system of the wheelchair, the connection
to the positive pole of the battery must always be removed.
Take care when using metal objects in connection with work on the batte-
ries. Short-circuiting can easily cause an explosion. Always use protecti-
ve gloves and goggles.
General
• Batteries discharge themselves and must be kept charged to prevent them
from being damaged.
• The wheelchair must not be stored in rooms in which condensation occurs
(mist or moisture on surfaces), e.g. laundry or similar rooms.
• The wheelchair may be stored in an unheated room. From the point of view
of corrosion, it is best for the chair if the room is a few degrees warmer than
the surroundings, which keeps the room drier.
Short-term storage
In order for the charging process to produce a battery with good capacity, the
temperature in the storage room should not be less than 41 F. Storage at less
than 41 F increases the risk that the battery is not fully charged when it is used
and also increases the risk of corrosion.
Long-term storage
The chair may be stored in an unheated room but the battery should be
maintenance-charged at least once per month. See also Short-term storage
above.
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Maintenance and Repairs