Ries Hitachi Highly WHP15600VSD, Installation Manual

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H E A T P U M P W A T E R H E A T E R C O M P R E S S O R C R I T E R I A
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23 Avoid refrigerant migration
The refrigerant migration to compressor shell should be avoided during the heat
pump water heater
system shut down periods, It’s suggested that the electric
heating belt should be used around the shell bottom when necessary.
24 Miscellany
（1）The compressor should be carried carefully to avoid drop, drag ,impact and should
not apply partial force on projection parts such as pipe, hermetic terminals,
foot during carrying and processing.
（2）The compressor should not be operated to form a vacuum and to absorb air.
The compressor only can run in one direction which according to lead routing
wiring diagram. Never reversion otherwise the compressor will be in trouble.
（3）The compressor should not be left opened in the atmosphere for more than
5 minutes.
When the air entered into the unit system with refrigerant R410A, it will
expedite the deterioration of the oil and result in the capillary depositing
and the reducing of insulation resistance.
（4）Electric pulse should not be applied to compressor when it is in vacuum.
（5）The compressor should be kept in the place with low-dust, low-moisture.