Special Tools For R410A; Accessories; Combinations; Optional Parts - Fujitsu Airstage AOU72RLAVL Installation Manual

2.2. Special tools for R410A

Tool name Contents of change for R22 tool
Pressure is huge and cannot be measured with a conventional gauge.
To prevent erroneous mixing of other refrigerants, the diameter of each
Gauge port has been changed.
manifold It is recommended to use a gauge manifold with a high pressure display
range 500 microns to 768 psi (-0.1 to 5.3 MPa) and a low pressure
display range 500 microns to 551 psi (-0.1 to 3.8 MPa).
Charging To increase pressure resistance, the hose material and base size were
hose changed.
A conventional vacuum pump can be used by installing a vacuum pump
adapter.
Vacuum • A conventional vacuum pump can be used by installing a vacuum
pump pump adapter.
• Be sure that the pump oil does not back flow into the system. Use one
capable for vacuum suction of 500 microns (-100.7kPa).
Gas leakage
Special gas leakage detector for HFC refrigerant R410A.
detector

2.3. Accessories

Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.
Name and shape
Specifications
manual
Installation manual
Drain cap
Drain pipe
Joint pipe A
Joint pipe B
Joint pipe C
Joint pipe A-L
Joint pipe B-L
Push mount cable tie

2.4. Combinations

The number of indoor units that can be connected are as follows:
Outdoor unit cooling capacity
Model
[Btu/h (kW)]
AOU72RLAVL 72,000 (21.1)
AOU96RLAVL 96,000 (28.1)
AOU120RLAVL 120,000 (35.2)
En-3
Q'ty Application
1 —
(This manual)
1
For outdoor unit drain piping
9
work
For outdoor unit drain piping
1 work
For connecting gas pipe
1
(L type)
(72, 96 model
only)
1 For connecting gas pipe
(72, 96 model (Straight type)
only)
1 For connecting liquid pipe
(72, 96 model (Straight type)
only)
For connecting gas pipe
1
(L type)
(120 model
only)
1 For connecting gas pipe
(120 model (Straight type)
only)
For binding transmission cable
4
Maximum connectable indoor
units
18
24
30

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 Separation tube kit and Header
Separation tube and header uses the following parts. A header is used for connecting the
indoor units.
Total cooling capacity of
Separation tube
indoor units (x) [Btu/h] *1
x < 96,500 UTP-AX090A
96,500 ≤ x UTP-AX180A
*1: Total cooling capacity of indoor units means the total value of indoor unit cooling
capacity connected downstream.
2.5.2 External connect kit
Model
For External input (CN131, CN132, 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)

2.6. About unit of the length

All Fujitsu General products are 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

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)]
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.
Do not tilt the outdoor unit more than 0.3 degrees. However, do not install the unit with it
tilted towards the side containing the compressor.
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.
CAUTION
Header
3-6 Branches 3-8 Branches
UTR-H0906L UTR-H0908L
UTR-H1806L UTR-H1808L
Usage
WARNING
Refrigerant concentration [lb/Mcf (kg/m³)]
≤
[25 lb/Mcf (0.39 kg/m³)]
CAUTION