En-1
1. SAFETY PRECAUTIONS
1.1. IMPORTANT! Please read before starting
This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to install or service the
system so it operates safely and ef
fi
ciently.
For safe installation and trouble-free operation, you must:
• Carefully read this instruction booklet before beginning.
• Follow each installation or repair step exactly as shown.
• Observe all local, state, and national electrical codes.
• Pay close attention to all danger, warning, and caution notices given in this manual.
WARNING:
This symbol refers to a hazard or unsafe practice which can result in
severe personal injury or death.
CAUTION:
This symbol refers to a hazard or unsafe practice which can result in
personal injury and the potential for product or property damage.
• Hazard alerting symbols
Electrical
Safety/alert
If Necessary, Get Help
These instructions are all you need for most installation sites and maintenance conditions.
If you require help for a special problem, contact our sales/service outlet or your certi
fi
ed
dealer for additional instructions.
In Case of Improper Installation
The manufacturer shall in no way be responsible for improper installation or maintenance
service, including failure to follow the instructions in this document.
1.2. SPECIAL PRECAUTIONS
When Wiring
ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH.
ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE
THIS SYSTEM.
• Do not supply power to the unit until all wiring and tubing are completed or reconnected
and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the wir-
ing diagram and these instructions when wiring. Improper connections and inadequate
earthing (grounding) can cause accidental injury or death.
• Earth (Ground) the unit following local electrical codes.
• Connect all wiring tightly. Loose wiring may cause overheating at connection points and
a possible
fi
re hazard.
When Transporting
Be careful when picking up and moving the indoor and outdoor units. Get a partner to help,
and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum
fi
ns on the air conditioner can cut your
fi
ngers.
When Installing...
...In a Ceiling or Wall
Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to
construct a strong wood or metal frame to provide added support.
...In a Room
Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping
and water damage to walls and
fl
oors.
...In an Area with High Winds
Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baf
fl
e.
...In a Snowy Area (for Heat Pump-type Systems)
Install the outdoor unit on a raised platform that is higher than drifting snow.
When Connecting Refrigerant Tubing
• Keep all tubing runs as short as possible.
• Use
the
fl
are method for connecting tubing.
• Apply refrigerant lubricant to the matching surfaces of the
fl
are and union tubes before
connecting them, then tighten the nut with a torque wrench for a leak-free connection.
• Check carefully for leaks before opening the refrigerant valves.
When Servicing
• Turn the power OFF at the main circuit breaker panel before opening the unit to check
or repair electrical parts and wiring.
• Keep
your
fi
ngers and clothing away from any moving parts.
• Clean up the site after you
fi
nish, remembering to check that no metal scraps or bits of
wiring have been left inside the unit being serviced.
• After installation, explain correct operation to the customer, using the operating manual.
DANGER
Never touch electrical components immediately after the power supply has
been turned off. Electrical shock may occur. After turning off the power, always
wait 5 minutes or more before touching electrical components.
INSTALLATION MANUAL
PART NO. 9373870135-03
VRF system indoor unit (Duct type)
Contents
1. SAFETY
PRECAUTIONS
........................................................................................... 1
1.1. IMPORTANT! Please read before starting ............................................................ 1
1.2. SPECIAL PRECAUTIONS .................................................................................... 1
2. ABOUT THIS PRODUCT ............................................................................................ 2
2.1. Precautions for using R410A refrigerant .................................................................. 2
2.2. Special tool for R410A .......................................................................................... 2
2.3. Accessories .......................................................................................................... 2
2.4. Optional parts ....................................................................................................... 3
2.5. About unit of the length ......................................................................................... 3
3. INSTALLATION
WORK
.............................................................................................. 3
3.1. Selecting an installation location .......................................................................... 3
3.2. Installation dimension ........................................................................................... 3
3.3. Installation the unit ................................................................................................ 3
4. PIPE
INSTALLATION
.................................................................................................. 4
4.1. Selecting the pipe material ................................................................................... 4
4.2. Pipe requirement .................................................................................................. 4
4.3. Flare connection (pipe connection) ...................................................................... 4
4.4. Installing heat insulation ....................................................................................... 5
5. INSTALLING DRAIN PIPES ....................................................................................... 5
6. ELECTRICAL
WIRING
................................................................................................ 6
6.1. Electrical requirement ........................................................................................... 7
6.2. Wiring method ...................................................................................................... 7
6.3. Unit wiring ............................................................................................................. 7
6.4. Connection of wiring ............................................................................................ 8
6.5. External input and external output (Optional parts) .............................................. 9
6.6. Remote sensor (Optional parts) ........................................................................ 11
6.7. IR receiver unit (Optional parts) .......................................................................... 11
7. FIELD
SETTING
........................................................................................................ 11
7.1. Setting the address ............................................................................................. 11
7.2. Custom code setting ........................................................................................... 12
7.3. Function setting ................................................................................................. 13
8. TEST
RUN
................................................................................................................. 13
8.1. Test run using Outdoor unit (PCB) ..................................................................... 13
8.2. Test run using remote controller ............................................................................. 13
9. CHECK
LIST
............................................................................................................. 13
10. ERROR CODES
........................................................................................................ 14
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