En-3
2. 4. Optional parts
CAUTION
The following parts are optional parts specifi c to R410A refrigerant.
Do not use parts other than those listed below.
2. 4. 1. Separation tube kit
Separation tube uses the following parts.
Separation tube Total cooling capacity of indoor unit (kw)
UTP-AX054A ALL
2. 4. 2. Header
Header uses the following parts. A header is used for connecting the indoor units.
Header
Total cooling capacity of
indoor unit (kw)
3-6 Branches 3-8 Branches
UTR-H0906L UTR-H0908L ALL
2. 4. 3. External connect kit
Model Usage
UTY-XWZXZ6
For External input
(CN131, CN132, CN133, CN134)
For External output
(Error status / CN136)
(Operation status / CN137)
UTY-XWZXZF For External input (CN135)
UTY-XWZXZ9
For External output
(Base heater / CN115)
3. INSTALLATION WORK
Please obtain the approval of the customer when selecting the location of installation
and installing the main unit.
3. 1. Selecting an installation location
WARNING
Install the unit in a location that can withstand its weight, and where it will not topple or
fall.
• Calculate the proper refrigerant concentration if you will be installing it in an
enclosed location.
Total amount of replenished
refrigerant in refrigerant facility (kg)
Capacity of smallest room where unit is installed (m
3
)
Refrigerant
concentration (kg/m
3
)
(0.44kg/m
3
)
• If the results of the calculation exceed the concentration limit, increase the room surface
area or install a ventilation duct.
CAUTION
Please install the outdoor unit without slant. (within 3 degrees)
Install this unit in a location with good ventilation.
If the unit must be installed in an area within easy reach of the general public, install
as necessary a protective fence or the like to prevent their access.
Install the unit in an area that would not inconvenience your neighbors, as they could
be aff ected by the airfl ow coming out from the outlet, noise, or vibration.
If it must be installed in proximity to your neighbors, be sure to obtain their approval.
If the unit is installed in a cold region that is aff ected by snow accumulation, snow fall,
or freezing, take appropriate measures to protect it from those elements.
To ensure a stable operation, install inlet and outlet ducts.
Install the unit in an area that would not cause problems even if the drain water is
discharged from the unit. Otherwise, provide drainage that would not aff ect people or
objects.
Install the unit in an area that has no heat sources, vapors, or the risk of the leakage
of fl ammable gas in the vicinity.
Install the unit in an area that is away from the exhaust or vent ports that discharge
vapor, soot, dust, or debris.
Install the indoor unit, outdoor unit, power supply cable, transmission cable and
remote control cable at least 1 meter away from a television or radio.
The purpose of this is to prevent TV reception interference or radio noise. (Even if
they are installed more than 1 meter apart, you could still receive noise under some
signal conditions.)
Keep the length of the piping of the indoor and outdoor units within the allowable
range.
For maintenance purposes, do not bury the piping.
3. 2. Drain processing
CAUTION
Perform drain work in accordance with this Manual, and ensure that the drain water
is properly drained. If the drain work is not carried out correctly, water may drip down
from the unit, wetting the furniture.
When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe
and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe
may freeze in extremely cold weather.
• As the drain water fl ows out of the outdoor unit during heating operation, install the
drain pipe and connect it to a commercial 16mm hose.
• When installing the drain pipe, plug all the holes other than the drain pipe mounting
hole in the bottom of the outdoor unit with putty so there is no water leakage.
341
296
315
140
438
278
40
622
Drain cap mounting hole ×7
(Unit: mm)
Drain pipe mounting hole ×1
Base
Drain pipe
Drain pipe mounting hole
3. 3. Installation dimensions
CAUTION
Provide suffi cient installation space, such as transportation route, maintenance space,
ventilation space, refrigerant piping space, and passageways.
Pay attention to the specifi cations of the installation space as shown in the fi gure. If
the unit is not installed according to specifi cations, it may cause short circuit or poor
performance. The unit may be prone to lapse into non-operation due to high pressure
protection.
When there is a wall in front of the unit, provide a space of 500mm or more as main-
tenance space.
When there is a wall at the right side of the unit, provide a space of 100mm or more
as maintenance space.
An outdoor temperature of 35 °C (DB) in air-conditioned operation is assumed for
the installation space in this item. If the outdoor temperature exceeds 35 °C (DB) and
the outdoor unit is operating at a load exceeding its rated ability, provide a larger inlet
space.
If you are installing more outdoor units than indicated here, please ensure suffi cient
space or consult your distributing agent as it may aff ect the performance due to short
circuit and other problems.
Consider the transportation route, installation space, maintenance space, and access,
and install the unit in a location with suffi cient space for the refrigerant piping.
Observe the installation space specifi cations that are shown in the fi gures.
Keep the same space at rear air intake.
Provide the same space for the air intake at the rear of the outdoor unit.
If the installation is not performed according to the specifi cations, it could cause a
short circuit and result in a lack of operating performance. As a result, the outdoor unit
might easily be stopped by high-pressure protection.
Air intake
Rear view
≤
227
305
321
50
76
526
690
9380545149-02_IM_EN.indd 39380545149-02_IM_EN.indd 3 9/7/2021 1:38:53 PM9/7/2021 1:38:53 PM
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