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 condi-
tions. 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 mainte-
nance 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 recon-
nected and checked.
• Highly dangerous electrical voltages are used in this system. Carefully refer to the
wiring diagram and these instructions when wiring. Improper connections and inad-
equate 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 neces-
sary 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.
• Be sure to read this Manual thoroughly before installation.
•
The warnings and precautions indicated in this Manual contain important information
pertaining to your safety. Be sure to observe them.
•
Hand this Manual, together with the Operating Manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the
unit.
INSTALLATION MANUAL
PART NO. 9366249030-05
VRF system RB unit
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 tools for R410A ..................................................................................2
2.3. Accessories.....................................................................................................2
2.4. Optional parts.................................................................................................3
2.5. About unit of the length ..................................................................................3
3. PRODUCT
SELECTION..........................................................................................3
4. PIPING
SPECIFICATIONS......................................................................................3
5. INSTALLATION
WORK
...........................................................................................3
5.1. Selecting an installation location .....................................................................3
5.2. Installation dimensions....................................................................................4
5.3. Hanger bolt installation ...................................................................................4
5.4. Hanging metal
fi
xtures ....................................................................................4
5.5. Installing the hanger........................................................................................4
5.6. Changing the positioning of the control box ....................................................5
5.7. Installation of the unit ......................................................................................5
6. PIPE
INSTALLATION
..............................................................................................6
6.1. Pipe selection..................................................................................................6
6.2. Selecting the pipe material..............................................................................6
6.3. Pipe connection ..............................................................................................7
6.4. Installing heat insulation..................................................................................7
7. ELECTRICAL
WIRING
............................................................................................7
7.1. Safety precautions for electrical wiring ...........................................................7
7.2. Electrical requirement
.....................................................................................8
7.3. Wiring
..............................................................................................................8
8. FIELD
SETTING
....................................................................................................10
8.1. PC board layout ............................................................................................10
8.2. Address setting
.............................................................................................10
8.3. Function setting.............................................................................................10
9. EXTERNAL
INPUT
................................................................................................11
10. TEST RUN
.............................................................................................................11
10.1. Test run using Outdoor unit (PC board) .......................................................11
10.2. Test run using Remote Controller .................................................................11
11. CHECK LIST..........................................................................................................11
12. INDICATOR LAMP STATUS .................................................................................12
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