Panasonic WH-SDF09C3E8, Service Manual

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11.4.5 Pipe Insulation
1 Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation
Diagram. Please wrap the insulated piping end to prevent water from going inside the piping.
2 If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by
using POLY-E FOAM with thickness 6 mm or above.
11.4.6 Disposal of Outdoor Unit Drain Water

If a drain elbow is used, the unit should be placed on a stand which is taller than 50mm.

If the unit is used in an area where temperature falls below 0°C for 2 or 3 days in succession, it is recommended
not to use a drain elbow, for the drain water freezes and the fan will not rotate.