Installation Manual

En-5
English
3. SYSTEM CONFIGURATION
For the installation method of indoor and outdoor units,
refer to the installation manuals that come with them.
Breaker2
Breaker1
Breaker2
Breaker1
Breaker2
Breaker1
Breaker2
Breaker1
Breaker2 Circuit breaker (MOCP:Maximum
Over Current Protection)
Breaker1 Earth leakage breaker
Piping
Power supply
Transmission line
Power supply and Transmission line
Branch box
Primary unit : UTP-PU03A
Secondary unit : UTP-PU03B
Branch box
(Secondary2)
Branch box
(Secondary1)
Separation
tube
Separation
tube
Branch box
(Primary)
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Outdoor unit
Power
supply
Power
supply
Power
supply
Power supply
4. INSTALLATION WORK
2 to 8 indoor units can be connected.
When installing just 1 branch box, be sure to use
the primary unit.
When installing multiple branch boxes, use both
the primary unit and secondary units together.
4.1. Selecting an installation location
CAUTION
Do not install the Branch box in the following areas:
• Area with high salt content, such as at the seaside. It will
deteriorate metal parts, causing the parts to fail or the unit
to leak water.
• Area filled with mineral oil or containing a large amount of
splashed oil or steam, such as a kitchen. It will deteriorate
plastic parts, causing the parts to fail or the unit to leak water.
• Area that generates substances that adversely affect the
equipment, such as sulfuric gas, chlorine gas, acid, or
alkali. It will cause the copper pipes and brazed joints to
corrode, which can cause refrigerant leakage.
• Area containing equipment that generates electromagnetic
interference. It will cause the control system to malfunction,
preventing the unit from operating normally.
• Area that can cause combustible gas to leak, contains suspended
carbon fi bers or fl ammable dust, or volatile infl ammables such as
paint thinner or gasoline. If gas leaks and settles around the unit,
it can cause a fi re.
• Area where small animals may live. It may cause failure, smoke
or fi re if small animals enter and touch internal electrical parts.
• Area where animals may urinate on the unit or ammonia may be
generated.
÷
Install the branch box in a location that has strong support
and no vibrations.
÷
Install in a location that has enough space for branch box
installation.
÷
Install in a well-ventilated area.
÷
Install in a location that is not exposed to high temperatures
or humidity over a long periods.
÷
Do not install the unit near a bedroom. Refrigerant noise
may be heard from the piping.
÷
Refer to “4.2 Installation dimensions” for installation restrictions.
When installing the unit in a location such as above the ceiling or on the wall, follow the conditions below.
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