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Unit in as-delivered condition
If the unit is still in the condition in which it left the factory - all packing materials are
undisturbed - then the acceptable temperature range during transportation, handling and
storage is: –50°C (–58ºF) to +60°C (+140ºF).
If the unit has been exposed to freezing temperatures, then allow it to reach the ambient
temperature of the sump before operating.
2.4 Storage guidelines
Storage location
The product must be stored in a covered and dry location free from heat, dirt, and vibrations.
NOTICE:
Protect the product against humidity, heat sources, and mechanical damage.
NOTICE:
Do not place heavy weights on the packed product.
Freezing precautions
The unit is frost-proof while operating or immersed in liquid, but the impeller/propeller and
the shaft seal may freeze if the unit is lifted out of the liquid into a surrounding temperature
below freezing.
Follow these guidelines to avoid freezing damage:
When
Before storage
After storage
Long-term storage
If the unit is stored for more than six months, then the following apply:
• Before operating the unit after storage, it must be inspected. Special attention must be
given to the seals and the cable entry.
• The impeller or propeller must be rotated every other month to prevent the seals from
sticking together.
P7900 Installation, Operation, and Maintenance Manual
Guideline
• The unit must be allowed to run for a short time after raising it to
discharge remaining pumped liquid.
This does not apply to impeller/propeller units.
• The discharge opening must be covered in a suitable way, or
placed facing down so that any still remaining pumped liquid runs
out.
• If present, the cooling jacket must be drained manually by opening
the air vent screws at the top of the cooling jacket.
If the impeller/propeller is frozen, it must be thawed by immersing the
unit in liquid before operating the unit.
NOTICE:
Never use a naked flame to thaw the unit.
2 Transportation and Storage
9
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