Table Of Contents; Safety Precautions; Before Installation And Electric Work - Mitsubishi Electric CMB-P-NU-J1 Installation Manual

Contents
1. Safety precautions ........................................................................................ 2
1.1. Before installation and electric work ............................................ 2
1.2. Precautions for devices that use R410A refrigerant .................... 3
1.3. Before installation ........................................................................ 3
1.4. Before installation (relocation) - electrical work ........................... 3
1.5. Before starting the test run .......................................................... 3
2. Items to be used ........................................................................................... 4
2.1. Package contents ........................................................................ 4
2.2. Commercially available items ...................................................... 4
3. Selecting an installation site ......................................................................... 4
3.1. About the product ........................................................................ 4
3.2. Installation site ............................................................................ 4
3.3. Securing installation and service space ...................................... 5
3.4. Checking the installation site ....................................................... 5

1. Safety precautions

1.1. Before installation and electric work

Before installing the unit, make sure you read all the "Safety
precautions".
The "Safety precautions" provide very important points
regarding safety. Make sure you follow them.
Symbols used in the text
Warning:
Describes precautions that should be observed to prevent danger of injury
or death to the user.
Caution:
Describes precautions that should be observed to prevent damage to the unit.
Symbols used in the illustrations
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: Beware of electric shock. (This symbol is displayed on the main unit
label.) <Color: Yellow>
Warning:
HIGH VOLTAGE WARNING:
Control box houses high-voltage parts.
When opening or closing the front panel of the control box, do not let it
come into contact with any of the internal components.
Before inspecting the inside of the control box, turn off the power, keep
the unit off for at least 10 minutes.
Warning:
If the supply cord is damaged, it must be replaced by the manufacturer,
its service agent or similarly qualified persons in order to avoid a
hazard.
This appliance is not intended for use by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a person responsible
for their safety.
This appliance is intended to be used by expert or trained users in
shops, in light industry and on farms, or for commercial use by lay
persons.
Do not use refrigerant other than the type indicated in the manuals
provided with the unit and on the nameplate.
during use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible
for malfunctions or accidents resulting from the use of the wrong type of
refrigerant.
Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric
Install the unit at a place that can withstand its weight.
- Failure to do so may cause the unit to fall down, resulting in injuries and
damage to the unit.
that the outside force of the cable is not applied to the terminals.
2
4. Installing BC controller ................................................................................. 9
4.1. Installing BC controllers .............................................................. 9
5. Connecting refrigerant pipes and drain pipes............................................. 10
5.1. Pipe connecting method ............................................................ 10
5.2. Connecting refrigerant pipes ..................................................... 11
5.3. Refrigerant piping work ............................................................. 13
5.4. Insulating refrigerant pipes ........................................................ 13
5.5. Drain piping work ...................................................................... 13
6. Electrical work ............................................................................................ 14
7. Setting addresses and operating units ....................................................... 14
8. Checklist after installation ........................................................................... 14
9. Test run ....................................................................................................... 14
10. Important information to be passed on to the end users ............................ 14
- Improper installation may cause the unit to fall down and result in injury
and damage to the unit.
- Ask an authorized technician to install the accessories. Improper
Never attempt to repair the unit without the proper qualifications. If
the air conditioner must be repaired, consult the dealer, contractor or
result.
When handling this product, always wear protective equipment.
EG: Gloves, full arm protection namely boiler suit, and safety glasses.
- Improper handling may result in injury.
If refrigerant gas leaks during installation work, ventilate the room.
be released.
Install the air conditioner according to this Installation Manual.
result.
Have all electric work done by a licensed electrician according
to "Electric Facility Engineering Standard" and "Interior Wire
Regulations"and the instructions given in this manual and always use
a dedicated power supply.
- If the power source capacity is inadequate or electric work is performed
Keep the electric parts away from water (washing water etc.).
Securely install the cover of control box.
- If the cover is not installed properly, dust or water may enter the outdoor
When installing and moving the air conditioner to another site, do not
the unit.
- If a different refrigerant or air is mixed with the original refrigerant, the
refrigerant cycle may malfunction and the unit may be damaged.
If the air conditioner is installed in a small room, measures must be
taken to prevent the refrigerant concentration from exceeding the
safety limit if the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to prevent the
safety limit from being exceeded. Should the refrigerant leak and cause
the safety limit to be exceeded, hazards due to lack of oxygen in the room
could result.
When moving and reinstalling the air conditioner, consult the dealer or
an authorized technician.
- If the air conditioner is installed improperly, water leakage, electric shock,
After completing installation work, make sure that refrigerant gas is not
leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or
other heat source, it may generate noxious gases.
Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is shorted
or operated forcibly, or parts other than those specified by Mitsubishi
To dispose of this product, consult your dealer.
The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- Choose the appropriate wire size and the switch capacities for the main
power supply described in this manual if local regulations are not available.
Pay special attention to the place of installation, such as basement, etc.
where refrigeration gas can accumulate, since refrigerant is heavier
than the air.