Technical Changes; Combination Of Indoor And Outdoor Units; Safety Precaution - Mitsubishi Electric Mr.Slim PLH-P3AAH.UK Technical & Service Manual

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TECHNICAL CHANGES

PLH-P3AAH.UK PLH-P3AAH
PLH-P5AAH.UK PLH-P5AAH
REMOTE CONTROLLER has changed.(PAR-S27A-E
Outdoor units which are connected to PLH-P•AAH.UK and PLH-P•AAH
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COMBINATION OF INDOOR AND OUTDOOR UNITS

Indoor unit
PLH-P3AAH.UK
PLH-P3AAH
PLH-P4AAH.UK
PLH-P4AAH
Heat pump with
electric heater
PLH-P5AAH.UK
PLH-P5AAH
PLH-P6AAH.UK
PLH-P6AAH
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SAFETY PRECAUTION

Cautions for devices that use R407C refrigerant.
· Do not use the existing refrigerant piping.
-The old refrigerant and lubricating oil in the existing piping contains a large amount of chlorine which may cause the lubricating
oil of the new unit to deteriorate.
· Use "low residual oil piping".
-If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricating oil will
result.
· Store the piping to be used during installation indoors and keep both ends of the piping sealed until just before
brazing. (Store elbows and other joints in a plastic bag.)
-If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result.
· Use Suniso 4GS or 3GS (small amount) as the lubricating oil to coat flares and flange connection parts.
-The lubricating oil used with the air conditioner is highly hygroscopic. If it is used, water may be mixed in and deterioration
of the lubricating oil may result.
· Use liquid refrigerant to charge the system.
-If gas refrigerant is used to charge the system, the composition of the refrigerant in the cylinder will change and perfor-
mance may drop.
· Do not use a refrigerant other than R407C.
-If another refrigerant (R22, etc.) is used, the chlorine in the refrigerant may cause the lubricating oil to deteriorate.
· Use a vacuum pump with a reverse flow check valve.
-The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricating oil to deteriorate.
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.UK PLH-P4AAH.UK
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.UK PLH-P6AAH.UK
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