Table Of Contents; Safety Precautions; Before Installation - Mitsubishi Electric PUH-8 Installation Manual

Contents
1. Safety precautions ...................................................................................... 8
1.1. Before installation ...................................................................... 8
1.2. Before installation (relocation) ................................................... 9
1.3. Before electrical work ................................................................ 9
1.4. Before starting the test run ........................................................ 9
2. Specifications .............................................................................................. 9
3. Selecting an installation site ....................................................................... 9
4. Space required around unit ...................................................................... 10
5. Lifting method and weight of product ........................................................ 10
6. Installation of unit ...................................................................................... 10
6.1. Installation ............................................................................... 10
6.2. Connecting direction for refrigerant pipe ................................. 10
7. Refrigerant piping installation ................................................................... 10
7.1. Caution .................................................................................... 10
7.2. Caution for piping connection/valve operation ......................... 11
7.3. Refrigerant piping system ........................................................ 11

1. Safety precautions

s Before installing the unit, make sure you read all the "Safety
precautions".
s The "Safety precautions" provide very important points re-
garding 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.
After installation work has been completed, explain the "Safety Precautions",
use, and maintenance of the unit to the customer according to the informa-
tion in the Operation Manual and perform the test run to ensure normal op-
eration. Both the Installation Manual and Operation Manual must be given to
the user for keeping. These manuals must be passed on to subsequent us-
ers.
Symbols put on the unit
: 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:
Carefully read the labels affixed to the main unit.
Warning:
• Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric shock,
or fire.
• Install the unit at a place that can withstand its weight.
- Inadequate strength may cause the unit to fall down, resulting in injuries.
• Use the specified cables for wiring. Make the connections securely so
that the outside force of the cable is not applied to the terminals.
- Inadequate connection and fastening may generate heat and cause a fire.
• Prepare for strong winds and earthquakes and install the unit at the speci-
fied place.
- Improper installation may cause the unit to topple and result in injury.
• Always use an filter and other accessories specified by Mitsubishi Elec-
tric.
- Ask an authorized technician to install the accessories. Improper installation
by the user may result in water leakage, electric shock, or fire.
• Never repair the unit. If the air conditioner must be repaired, consult the
dealer.
- If the unit is repaired improperly, water leakage, electric shock, or fire may
result.
• Do not touch the heat exchanger fins.
- Improper handling may result in injury.
• 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.
8
8. Additional refrigerant charge ....................................................................... 11
8.1. Additional refrigerant charge ................................................... 11
8.2. Airtight test, evacuation, and refrigerant charging ................... 11
8.3. Thermal insulation of refrigerant piping ................................... 12
9. Wiring ........................................................................................................ 12
9.1. Caution .................................................................................... 12
9.2. Wiring and fitting capacities .................................................... 13
9.3. Location of wiring connections ................................................ 13
10. System control .......................................................................................... 13
10.1. Address settings ...................................................................... 13
10.2. Examples of refrigerant system address setting ..................... 13
10.3. Capacity control setting method (PEH-16, 20 only) ................ 13
11. Test run ...................................................................................................... 14
11.1. Test run .................................................................................... 14
11.2. How to handle problems with the test run ............................... 14
11.3. The following occurrences are not problems or errors ............ 15
• If refrigerant gas leaks during installation work, ventilate the room.
- If the refrigerant gas comes into contact with a flame, poisonous gases will
be released.
• Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or fire may
result.
• Have all electric work done by a licensed electrician according to local
regulations and the instructions given in this manual.
- If the power source capacity is inadequate or electric work is performed im-
properly, electric shock and fire may result.
• Securely install the outdoor unit terminal cover (panel).
- If the terminal cover (panel) is not installed properly, dust or water may enter
the outdoor unit and fire or electric shock may result.
• When installing or relocating the unit, make sure that no substance other
than the specified refrigerant (R22) enters the refrigerant circuit.
- Any presence of foreign substance such as air can cause abnormal pres-
sure rise or explosion.
• 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 the refrigerant leakage.
- Consult the dealer regarding the appropriate measures to prevent the safety
limit from being exceeded. If 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, or
fire may result.
• 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
and operated forcibly, or parts other than those specified by Mitsubishi Elec-
tric are used, fire or explosion may result.
• To dispose of this product, consult your dealer.
• The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- Following standards may be applicable if local regulation are not available.
• Pay a special attention to the place, such as a basement, etc. where re-
frigeration gas can stay, since refrigeration is heavier than the air.
• The appliance is not intended for use by young children or infirm per-
sons without supervision.
• Young children should be supervised to ensure that they do not play
with the appliance.

1.1. Before installation

Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
• Do not use the air conditioner where food, pets, plants, precision instru-
ments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of
the air conditioner or damage its parts.