Fujitsu Airstage AOU36RLAVS Installation Manual Download Page 4

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En-3

2.2. Special tools for R410A

Tool name

Contents of change for R22 tool

Gauge
manifold

Pressure is huge and cannot be measured with a conventional gauge.
To prevent erroneous mixing of other refrigerants, the diameter of each
port has been changed.
It is recommended to use a gauge manifold with a high pressure display
range 30 inHg to 768 psi (-0.1 to 5.3 MPa) and a low pressure display
range 30 inHg to 551 psi (-0.1 to 3.8 MPa).

Charging
hose

To increase pressure resistance, the hose material and base size were
changed.

Vacuum
pump

A conventional vacuum pump can be used by installing a vacuum pump
adapter.
• A conventional vacuum pump can be used by installing a vacuum

pump adapter.

• Be sure that the pump oil does not back flow into the system. Use one

capable for vacuum suction of 30 inHg (-100.7 kPa).

Gas leakage
detector

Special gas leakage detector for HFC refrigerant R410A.

2.3. Accessories

Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.

Name and shape

Q’ty

Application

Specifications
manual

—

Installation
manual

(This book)

Drain cap

For outdoor unit drain piping work

Drain pipe

For outdoor unit drain piping work

Cable tie

For binding power cable and trans-
mission cable

Conduit plate

To fix Conduit tube

2.4. Optional

parts

CAUTION

The following parts are optional parts specific 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 [BTU/h]

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 [BTU/h]

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)

2.5. 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

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 refrig-
erant in refrigerant facility [lb (kg)]

≤

Refrigerant concentration [lb/1,000 ft³ (kg/m³)]
[25 lb/1,000 ft³ (0.40 kg/m³)]

Capacity of smallest room where
unit is installed [1,000 ft³ (m³)]

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
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

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 32 °F (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.

• If you are installing the drain pipe and drain caps,

please provide a working space under the base of
the outdoor unit.

• As the drain water flows out of the outdoor unit

during heating operation, install the drain pipe and
connect it to a commercial 5/8 in (16 mm) 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.

Base of the outdoor unit

Drain pipe

Drain pipe mounting hole

13-7/16 (341)

11-5/8 (296)

12-3/8 (315)