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Energy-saving combination
Combination (HP)
8
10
Outdoor Unit 1 (HP)
―
―
Outdoor Unit 2 (HP)
―
―
Outdoor Unit 3 (HP)
―
―
Maximum Connectable
*
*
Indoor Unit
Combination (HP)
32
34
Outdoor Unit 1 (HP)
12
14
Outdoor Unit 2 (HP)
12
12
Outdoor Unit 3 (HP)
8
8
Maximum Connectable
64
64
Indoor Unit
* Means that the energy-saving combination is unavailable.
When connecting outdoor units, install the outdoor unit with the largest nominal system
capacity nearest to the refrigerant pipe and indoor unit, followed by those with lesser
nominal system capacities. (Outdoor unit 1 ≥ Outdoor unit 2 ≥ Outdoor unit 3)
2.5. Optional parts
The following parts are optional parts specific to R410A refrigerant.
Do not use parts other than those listed below.
2.5.1 Outdoor unit branch kit
Model
UTP-DX567A
2.5.2 Separation tube
Model
for 2 pipes
UTP-AX054A
UTP-AX090A
UTP-BX090A
UTP-AX180A
UTP-BX180A
UTP-AX567A
UTP-BX567A
2.5.3 Header
3-6 branches
3-8 branches
UTR-H0906L
UTR-H0908L
UTR-H1806L
UTR-H1808L
2.5.4 External connect kit
Model
For External input (CN131, CN133, CN134)
UTY-XWZXZ6
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
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 (m³)
If the results of the calculation exceed the concentration limit, increase the room surface
area or install a ventilation duct.
En-3
12
14
16
18
20
22
24
―
―
8
―
12
―
8
―
―
8
―
8
―
8
―
―
―
―
―
―
8
*
*
34
*
43
*
52
36
38
40
42
44
46
48
12
14
14
14
16
―
―
12
12
14
14
14
―
―
12
12
12
14
14
―
―
64
64
64
64
64
*
*
CAUTION
Total cooling capacity of indoor unit [kW]
ALL
Total cooling capacity of
indoor unit [kW]
for 3 pipes
—
19.6 or less
28.0 or less
28.1 to 56.0
56.1 or more
Total cooling capacity of indoor unit [kW]
28.0 or less
28.1 to 56.0
Usage
WARNING
Refrigerant concentration (kg/m³)
≤
(0.42 kg/m³)
26
28
30
Select an installation location by observing the following precautions:
10
12
14
8
8
8
Install the unit level. (Within 3 degrees)
8
8
8
Install this unit in a location with good ventilation.
56
60
64
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
affected by the airflow 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 affected 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 affect people or
objects.
Install the unit in an area that has no heat sources, vapors, or the risk of the leakage of
flammable 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
• The drain water is discharged from the bottom of the equipment. Construct a drain ditch
around the base and discharge the drain water properly.
• When installing on a roof, perform floor waterproofing properly.
Drain processing:
• The drain water from the base of the outdoor unit
may generate during operations.
Perform drain processing, as necessary.
• When you want to prevent the drain water from leak-
ing at the perimeter, construct a ditch for the drain
water as shown in the figure.
• Provide a central drain pan, as necessary.
3.3. Clearance requirement
When installing the outdoor unit, pay attention to the following items.
Provide sufficient installation space, such as transportation route, maintenance space,
ventilation space, refrigerant piping space, and passageways.
Pay attention to the specifications of the installation space as shown in the figure. If
the unit is not installed according to specifications, it may cause short circuit or poor
performance. The unit may be prone to lapse into non-operation due to high pressure
protection.
Do not place obstructions in the air flow outlet direction. If there is an obstruction in the
outlet direction, install an outlet duct.
When there is a wall in front of the unit, provide a space of 500 mm or more as mainte-
nance space.
When there is a wall at the left side of the unit, provide a space of 30 mm or more as
maintenance space.
An outdoor temperature of 35 degrees in air-conditioned operation is assumed for the
installation space in this item. If the outdoor temperature exceeds 35 degrees 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 sufficient
space or consult your distributing agent as it may affect the performance due to short
circuit and other problems.
CAUTION
Outdoor unit
CAUTION
50 mm
or more
10 mm
or more
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