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Contents
Safety Considerations .................................... 1
Accessories ..................................................... 3
Precautions for Selecting a Location ........... 3
Precautions on Installation ............................ 4
Outdoor Unit Installation Diagram ................ 4
Installation Space Requirements .................. 5
Selecting a Location for Installation of the
Indoor Units ..................................................... 5
Connections (connection port) ..................... 6
How to Use Reducers ..................................... 7
Outdoor Unit Installation ................................ 8
1. Installing the outdoor unit ............................................ 8
2. Drain work ................................................................... 8
3. Flaring the pipe end ..................................................... 8
4. Refrigerant piping ........................................................ 9
5. Pressure test and evacuating system .......................... 10
6. Refilling refrigerant
...................................................... 11
7. Charging with refrigerant ............................................. 11
Wiring ............................................................... 12
Priority Room Setting ..................................... 14
Night Quiet Mode setting ............................... 15
COOL/ HEAT mode lock [S15] ....................... 15
When attaching the optional drain pan heater
(excluding 2MXLH, 3MXLH models) ................. 16
Pump Down Operation ................................... 16
Trial Operation and Testing ............................ 17
1. Wiring error check ....................................................... 17
2. Trial operation and testing ........................................... 18
3. Test items .................................................................... 18
Safety Considerations
Refer also to the General Safety Considerations in the
separate booklet.
Read the precautions in this manual
carefully before operating the unit.
Read these
Safety Considerations for Installation
carefully
before installing an air conditioner or heat pump. After completing
the installation, make sure that the unit operates properly during
the startup operation.
Instruct the user on how to operate and maintain the unit.
Inform users that they should store this installation manual with
the operation manual for future reference.
Always use a licensed installer or contractor to install this product.
Improper installation can result in water or refrigerant leakage,
electric shock, fire, or explosion.
Meanings of
DANGER
,
WARNING
,
CAUTION
, and
NOTE
Symbols:
DANGER ...........
Indicates an imminently hazardous
situation which, if not avoided, will
result in death or serious injury.
WARNING .........
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
CAUTION ..........
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury.
It may also be used to alert against
unsafe practices.
NOTE ................
Indicates situations that may result
in equipment or property damage
accidents only.
DANGER
• Refrigerant gas is heavier than air and replaces oxygen.
A massive leak can lead to oxygen depletion, especially
in basements, and an asphyxiation hazard could occur
leading to serious injury or death.
•
Do not ground units to water pipes, gas pipes, telephone
wires, or lightning rods as incomplete grounding can cause
a severe shock hazard resulting in severe injury or death.
Additionally, grounding to gas pipes could cause a gas leak
and potential explosion causing severe injury or death.
•
If refrigerant gas leaks during installation, ventilate the
area immediately. Refrigerant gas may produce toxic gas
if it comes into contact with fire. Exposure to this gas could
cause severe injury or death.
•
After completing the installation work, check that the
refrigerant gas does not leak throughout the system.
• Do not install unit in an area where flammable materials
are present due to risk of explosions that can cause
serious injury or death.
•
Safely dispose all packing and transportation materials
in accordance with federal/state/local laws or ordinances.
Packing materials such as nails and other metal or
wood parts, including plastic packing materials used for
transportation may cause injury or death by suffocation.
WARNING
• Only qualified personnel licensed or certified in their
jurisdiction must carry out the installation work. Installation
must be done in accordance with this installation manual.
Improper installation may result in water leakage, electric
shock, or fire.
•
When installing the unit in a small room, take measures to keep
the refrigerant concentration from exceeding allowable safety
limits. Excessive refrigerant leaks, in the event of an accident in
a closed ambient space, can lead to oxygen deficiency.
• Use only specified accessories and parts for installation
work. Failure to use specified parts may result in water
leakage, electric shock, fire, or the unit falling.
•
Install the air conditioner or heat pump on a foundation
strong enough that it can withstand the weight of the unit.
A foundation of insufficient strength may result in the unit
falling and causing injuries.
•
Take into account strong winds, typhoons, or earthquakes
when installing. Improper installation may result in the unit
falling and causing accidents.
•
Make sure that a separate power supply circuit is provided
for this unit and that all electrical work is carried out by
qualified personnel licensed or certified in their jurisdiction
according to local, state, and national regulations. An
insufficient power supply capacity or improper electrical
construction may lead to electric shock or fire.
The pictures in this document are for illustrative purposes only.
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