En-4
2.5.1 RB unit (for heat recovery system)
Model
UTP-
RU01DH
UTP-
RU01EH
UTP-
RU01FH
UTP-
RU04EH
UTP-
RU08DH
UTP-
RU12DH
Number of branches
14812
Max number of connectable
indoor units per branch
6886
Max capacity of con-
nectable indoor units
(Q)
Btu/h
Q ≤
27,000
Q ≤
60,000
Q ≤
96,000
Q ≤
191,000
(*1)
Q ≤
245,000
(*2)
Q ≤
324,000
(*2)
Max capacity of con-
nectable indoor units
per branch (Q)
Q ≤
27,000
Q ≤
60,000
Q ≤
96,000
Q ≤
60,000
Q ≤
27,000
Q ≤
27,000
*1: In case of 2 RB units connected in series (total 8-branches), maximum capacity of
connectable indoor units is up to 191,000 Btu/h.
*2: In case of separation tube kit (UTP-EX060A, UTP-EX096A) connected, maximum
capacity of connectable indoor units is up to 96,000 Btu/h.
2.5.2 Outdoor unit branch kit
Model
Total cooling capacity of
indoor unit [kW]
For Heat Pump system (2 pipe) UTP-CX567A
ALL
For Heat Recovery system (3 pipe) UTP-DX567A
2.5.3 Separation tube and header
For 2 pipe connection
Total cooling capacity of
indoor units (x) (Btu/h)
Separation tube
UTP-AX054A x < 66,000
UTP-AX090A x < 96,500
UTP-AX180A 96,500 ≤ x < 193,000
UTP-AX567A 193,000 ≤ x
Header
3 to 6 Branches
UTR-H0906L x < 96,500
UTR-H1806L 96,500 ≤ x < 193,000
3 to 8 Branches
UTR-H0908L x < 96,500
UTR-H1808L 96,500 ≤ x < 193,000
For 3 pipe connection
Total cooling capacity of
indoor units (x) (Btu/h)
Separation tube
UTP-BX090A x < 96,500
UTP-BX180A 96,500 ≤ x < 193,000
UTP-BX567A 193,000 ≤ x
Header
3 to 6 Branches
UTP-J0906A x < 96,500
UTP-J1806A 96,500 ≤ x < 193,000
3 to 8 Branches
UTP-J0908A x < 96,500
UTP-J1808A 96,500 ≤ x < 193,000
2.5.4 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)
2.6. About unit of the length
This product is manufactured to metric units and tolerances. United States customary
units are provided for reference only. In cases where exact dimensions and tolerances are
required, always refer to metric units.
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 [lb. (kg)]
≤
Refrigerant concentration [lb/Mcf (kg/m³)]
[25 lb/Mcf (0.39 kg/m³)]
Capacity of smallest room where unit
is installed [Mcf (m³)]
If the results of the calculation exceed the concentration limit, increase the room surface
area or install a ventilation duct.
CAUTION
Select an installation location by observing the following precautions:
Install the unit level. (Within 0.3 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
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 40 in (1 m) 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 40 in (1 m) 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
leaking at the perimeter, construct a ditch for the
drain water as shown in the figure.
• Provide a central drain pan, as necessary.
Outdoor unit
1 in (10 mm)
or more
2 in (50 mm)
or more
3.3. Clearance requirement
CAUTION
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 space requirement 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 airflow 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 95°FDB (35°CDB) in air-conditioned operation is assumed
for the space requirement in this item. If the outdoor temperature exceeds 95°FDB
(35°CDB) 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.
9378945722-05_IM_L3.indb 49378945722-05_IM_L3.indb 4 2023/3/24 9:23:482023/3/24 9:23:48
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