Precautions For Piping Work; Precautions For Electrical Wiring - Mitsubishi Electric CITY MULTI PURY-EM200YNW-A Manuel D'installation

Install the unit in accordance with the instructions to minimize the risk of damage from
earthquakes and strong winds.
- Improper installation will cause the unit to topple, resulting in serious injury.
The unit must be securely installed on a structure that can sustain its weight.
- Failure to do so will cause the unit to fall, resulting in serious injury.
Do not open the control box cover when charging refrigerant.
- Doing so may cause sparks, resulting in fire.
Seal all openings around pipes and wires to keep out small animals, rainwater, or snow.
- Failure to do so may result in current leakage, electric shock, or damage to the unit.
Do not install the unit where corrosive gas may be generated.
- Doing so can corrode the pipes, resulting in refrigerant leakage and fire.

1-4. Precautions for piping work

Piping work shall be kept to a minimum.
The pipes shall be protected from physical damage.
Before heating the brazed sections, remove the gas and oil that are trapped in the pipes.
- Failure to do so may generate fire, resulting in serious injury.
Do not purge the air using refrigerant. Use a vacuum pump to evacuate the system.
- Residual gas in the refrigerant lines will cause bursting of the pipes or an explosion.
Do not use oxygen, flammable gas, or a refrigerant containing chlorine for air-tightness
testing.
- Doing so may result in an explosion. Chlorine will deteriorate the refrigerant oil.
When installing or relocating the unit, do not allow air or any substance other than the
specified refrigerant to enter the refrigerant lines.
- Any substance other than the specified refrigerant may cause abnormally high pressure in the
refrigerant lines, resulting in bursting of the pipes or an explosion.
After the installation has been completed, check for refrigerant leaks.
- If the refrigerant leaks, oxygen starvation may result. If the leaked refrigerant comes in contact
with a heat source, toxic gas will be generated.
Have a fire extinguisher nearby before brazing work.
- If the refrigerant leaks while brazing work is being performed, fire may result.
Provide no-smoking signs at the brazing workplace.
- If the refrigerant leaks when an ignition source is present, fire may result.

1-5. Precautions for electrical wiring

Include some slack in the power cables.
- Failure to do so may break or overheat the cables, resulting in smoke or fire.
WT08842X01
GB-5