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Mitsubishi Electric PURY-HP72 Service Handbook page 8

R410a
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Do not use a charging cylinder. The use of a
charging cylinder will change the composi-
tion of the refrigerant, compromising the
unit's performance.
Charge the system with an appropriate
amount of refrigerant in the liquid phase.
Refer to the relevant sections in the manu-
als to calculate the appropriate amount of
refrigerant to be charged. Refrigerant over-
charge or undercharge may result in perfor-
mance drop or abnormal stop of operation.
To reduce the risk of power capacity short-
age, always use a dedicated power supply
circuit.
To reduce the risk of both the breaker on the
product side and the upstream breaker from
tripping and causing problems, split the
power supply system or provide protection
coordination between the earth leakage
breaker and no-fuse breaker.
Have a backup system, if failure of the unit
has a potential for causing significant prob-
lems or damages.
vii

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