R410A Refrigerant - Mitsubishi Electric Fresh Master GUF-50RDH4 Installation Instructions Manual

If repair is performed improperly, water leakage, electric
1) Outdoor unit
Warning:
rubbish.
- Do not stand on, or place any items on the unit. You may fall
down or the item may fall, causing injury.
Caution:
- The outdoor unit should be installed in a location where air
and noise emitted by the unit will not disturb the neighbours.
2) Fresh Master
Warning:
- The Fresh Master should be securely installed. If the unit is
loosely mounted, it may fall, causing injury.
3) Remote controller
Warning:
- The Remote controller should be installed in such a way that
children cannot play with it.
4) Drain hose
Caution:
- Make sure that the drain hose is installed so that drainage
can go ahead smoothly. Incorrect installation may result in
water leakage, causing damage to furniture.
5) Refrigerant pipe
Warning:
- Be sure to wrap insulation around the piping. Direct contact
with the bare piping may result in burns or frostbite.
6) Power Supply, fuse or circuit isolator
Warning:
- Make sure that the unit is powered by a dedicated power sup-
ply. Other appliances connected to the same power supply
- Make sure that there is a mains power switch.
7) Grounding
Caution:
grounding wire to a gas pipe, water pipe, lightning conduc-
tor or tele phone grounding wire. If the unit is not grounded
properly, electric shock may result.
- Check frequently that the ground wire from the outdoor unit
is properly connected to both the unit's ground terminal and
the grounding electrode.
R407C refrigerant
Caution:
- Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping con-
tains a large amount of chlorine which may cause the refrigera-
tor oil of the new unit to deteriorate.
- Use refrigerant piping made of C1220 (CU-DHP) phosphorus
copper alloy seamless pipes and tubes". In addition, be sure
that the inner and outer surfaces of the pipes are clean and
ticles, oils, moisture, or any other contaminant.
- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.
- Store the piping to be used during installation indoors and
(Store elbows and other joints in a plastic bag.)
the oil and compressor trouble may result.
- The refrigerator oil will degrade if it is mixed with a large
-
amount of mineral oil.
-
the refrigerant in the cylinder will change and performance may
drop.
- Do not use a refrigerant other than R407C.
refrigerant may cause the refrigerator oil to deteriorate.
and cause the refrigerator oil to deteriorate.
al refrigerants.
- If the conventional refrigerant and refrigerator oil are mixed in
-
rate.
for conventional refrigerants will not react to it.
- Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deterio-
rate.
- Be especially careful when managing the tools.
may deteriorate.
-

R410A refrigerant

- Make sure to use new refrigerant piping.
the following points.
- Use of piping with thin wall should be avoided. (See P.10.)
- Use refrigerant piping made of C1220 (CU-DHP) phosphorus
and copper alloy seamless pipes and tubes". The pipes must
dition, be sure that the inner and outer surfaces of the pipes
-
-
-
-
-
-
3