2
2.1. Check the indoor unit accessories (Fig. 2-1)
The indoor unit should be supplied with the following accessories.
Accessory name
Q’ty
Installation template
1
Washers (with insulation)
Washers (without insulation)
4
4
Pipe cover (for refrigerant piping joint)
small diameter
large diameter
1
1
Band (large)
Band (small)
6
2
Screw with washer (M5 × 25) for mounting grille
4
Drain socket
1
Insulation
1
Before installing the unit, make sure you read all the “Safety precau-
tions”.
Please report to your supply authority or obtain their consent before
connecting this equipment to the power supply system.
1. Safety precautions
2. Installing the indoor unit
Fig. 2-1
Contents
1. Safety
precautions
..................................................................................... 2
2. Installing the indoor unit ............................................................................ 2
3. Refrigerant pipe and drain pipe ................................................................. 4
4. Electrical
work
........................................................................................... 6
5. Installing the grille ...................................................................................... 9
6. Test
run
.................................................................................................... 11
Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
After installation work has been completed, explain the “Safety Precautions,” use,
and maintenance of the unit to the customer according to the information in the
Operation Manual and perform the test run to ensure normal operation. Both the
Installation Manual and Operation Manual must be given to the user for keeping.
These manuals must be passed on to subsequent users.
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Indicates that caution should be taken with rotating parts.
: Indicates that the main switch must be turned off before servicing.
: Beware of electric shock.
: Beware of hot surface.
ELV
: At servicing, please shut down the power supply for both the Indoor and
Outdoor Unit.
Warning:
Carefully read the labels af
fi
xed to the main unit.
Caution:
Appliances not accessible to the general public.
Install the indoor unit at least 2.4 m (94-1/2 inch) above
fl
oor or grade level.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
• Install the unit at a place that can withstand its weight.
• Use the speci
fi
ed cables for wiring.
• Use only accessories authorized by Mitsubishi Electric and ask the dealer
or an authorized technician to install them.
• Do not touch the heat exchanger
fi
ns.
• Install the air conditioner according to this Installation Manual.
• Have all electric work done by a licensed electrician according to local
regulations.
• If the air conditioner is installed in a small room, measures must be taken
to prevent the refrigerant concentration from exceeding the safety limit
even if the refrigerant should leak.
Caution:
• Do not use the existing refrigerant piping, when use R410A or R407C refrig-
erant.
• Use ester oil, either oil or alkylbenzene (small amount) as the refrigerator oil
to coat
fl
ares and
fl
ange connections, when use R410A or R407C refrigerant.
• Do not use the air conditioner where food, pets, plants, precision instru-
ments, or artwork are kept.
• Do not use the air conditioner in special environments.
• Ground the unit.
• Install an leak circuit breaker, as required.
• Use power line cables of suf
fi
cient current carrying capacity and rating.
• Use only a circuit breaker and fuse of the speci
fi
ed capacity.
• Do not touch the switches with wet
fi
ngers.
• Do not touch the refrigerant pipes during and immediately after operation.
• Do not operate the air conditioner with the panels and guards removed.
• Do not turn off the power immediately after stopping operation.
1
2
3
4
5
6
7
1
2
3
4
5
6
7
• The cut face punched parts may cause injury by cut, etc. The installers are
requested to wear protective equipment such as gloves, etc.
• When installing or relocating, or servicing the air conditioner, use only the
speci
fi
ed refrigerant (R410A) to charge the refrigerant lines. Do not mix it
with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal high
pressure in the refrigerant line, and may result in an explosion and other
hazards.
The use of any refrigerant other than that speci
fi
ed for the system will cause
mechanical failure or system malfunction or unit breakdown. In the worst
case, this could lead to a serious impediment to securing product safety.
Note:
The phrase “Simple MA Remote controller” in this installation manual refers to the PAC-YT53CRAU.
If you need any information for the other remote controller, please refer to either the installation manual or initial setting manual which are included in these box.
