Permobil Chairman HD Owner's Manual page 34

Owner's Manual Chairman HD
Maintenance
During all work on the electrical system of the wheelchair, the connection
to the negative 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 protective
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 (+5°C). Storage
at less than 41 F (+5°C) 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 mainte-
nance-charged at least once per month. See also Short-term storage above.
Page 35
Maintenance and Repairs