Mitsubishi Electric PKA-RP100KAL / PUHZ-SHW112YHA [2/34] Safetyprecautions

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► Before installing the unit, make sure you read all the “Safety

precautions”.

► Please report to your supply authority or obtain their consent before

connecting this equipment to the power supply system.

Warning:

Describes precautions that must be observed to prevent danger of injury or

death to the user.

Caution:

specified in the outdoor unit installation manual.

• The unit must be installed according to the instructions in order to

minimize the risk of damage from earthquakes, typhoons, or strong winds.

An incorrectly installed unit may fall down and cause damage or injuries.

• The unit must be securely installed on a structure that can sustain its

weight.

• If the air conditioner is installed in a small room, measures must be taken

to prevent the refrigerant concentration in the room from exceeding the

safety limit in the event of refrigerant leakage. Should the refrigerant leak

and cause the concentration limit to be exceeded, hazards due to lack of

• The terminal block cover panel of the unit must be firmly attached.

• Use only accessories authorized by Mitsubishi Electric and ask a dealer or

an authorized technician to install them.

• The user should never attempt to repair the unit or transfer it to another

location.

• After installation has been completed, check for refrigerant leaks. If

refrigerant leaks into the room and comes into contact with the flame of a

heater or portable cooking range, poisonous gases will be released.

• When installing or relocating, or servicing the air conditioner, use only the

specified refrigerant (R410A) to charge the refrigerant lines. Do not mix it

mechanical failure or system malfunction or unit breakdown. In the worst

case, this could lead to a serious impediment to securing product safety.

1.1. Before installation (Environment)

Caution:

• Do not use the unit in an unusual environment. If the air conditioner is

installed in areas exposed to steam, volatile oil (including machine oil), or

sulfuric gas, areas exposed to high salt content such as the seaside, the

performance can be significantly reduced and the internal parts can be

damaged.

• Do not install the unit where combustible gases may leak, be produced,

water may drip from the indoor unit. Do not install the indoor unit where

such dripping can cause damage.

• When installing the unit in a hospital or communications office, be

prepared for noise and electronic interference. Inverters, home appliances,

high-frequency medical equipment, and radio communications equipment

can cause the air conditioner to malfunction or breakdown. The air

conditioner may also affect medical equipment, disturbing medical care,

and communications equipment, harming the screen display quality.

1. Safety precautions

After installation work has been completed, explain the “Safety precautions,” use,

Carefully read the labels affixed to the main unit.

1.4. Before starting the test run

Caution:

• Turn on the main power switch more than 12 hours before starting

operation. Starting operation just after turning on the power switch can

severely damage the internal parts.

• Before starting operation, check that all panels, guards and other

protective parts are correctly installed. Rotating, hot, or high voltage parts

can cause injuries.

• Do not operate the air conditioner without the air filter set in place. If the

Caution:

• Be sure to install molded case circuit brakers. If not installed, electric

shock may result.

• For the power lines, use standard cables of sufficient capacity. Otherwise,

a short circuit, overheating, or fire may result.

• When installing the power lines, do not apply tension to the cables.

• Be sure to ground the unit. If the unit is not properly grounded, electric

shock may result.

• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse),

and molded case circuit breaker) with the specified capacity. If the circuit

packaging bands. Wear protective gloves as you can injure your hands on

the fins or other parts.

• Be sure to safely dispose of the packaging materials. Packaging materials,

such as nails and other metal or wooden parts may cause stabs or other

injuries.

• Thermal insulation of the refrigerant pipe is necessary to prevent

condensation. If the refrigerant pipe is not properly insulated, condensation

will be formed.

• Place thermal insulation on the pipes to prevent condensation. If the

drainpipe is installed incorrectly, water leakage and damage to the ceiling,

2. Installation location ............................................................................................

3

3. Installing the indoor unit ....................................................................................

3

4. Installing the refrigerant piping ..........................................................................

7

5. Drainage piping work .........................................................................................

6. Electrical work ...................................................................................................

7. Test run ............................................................................................................

8. Easy maintenance function (Option) ...............................................................