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Except for EMERGENCY, never turn off main as well as sub breaker of the indoor

units during operation. It will cause compressor failure as well as water leakage.

First, stop the indoor unit by operating the control unit, converter or external input

device and then cut the breaker.

Make sure to operate through the control unit, converter or external input device.

When the breaker is designed, locate it at a place where the users cannot start and

stop in the daily work.

2. ABOUT THIS PRODUCT

2.1. Precautions for using the R410A refrigerant

Do not introduce any substance other than the prescribed refrigerant into the

refrigeration cycle.

If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become

abnormally high and cause the piping to rupture.

If there is a refrigerant leakage, make sure that it does not exceed the concentration

limit.

If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such

as oxygen starvation.

Do not touch refrigerant that has leaked from the refrigerant pipe connections or other

area. Touching the refrigerant directly can cause frostbite.

If a refrigerant leakage occurs during operation, immediately vacate the premises and

thoroughly ventilate the area.

If the refrigerant comes in contact with a ﬂ ame, it produces a toxic gas.

2.2. Special tool for R410A

To install a unit that uses the R410A refrigerant, use dedicated tools and piping

materials that have been manufactured speciﬁ cally for R410A use.

Because the pressure of the R410A refrigerant is approximately 1.6 times higher than

the R22, failure to use dedicated piping material or improper installation can cause

rupture or injury.

Furthermore, it can cause serious accidents such as water leakage, electric shock, or

ﬁ re.

Tool name

Pressure is huge and cannot be measured with a

conventional (R22) gauge. To prevent erroneous mixing

of other refrigerants, the diameter of each port has been

changed.

Gauge manifold

It is recommended to use a gauge manifold with a high

pressure display range 30in.Hg to 768 psi (–0.1 to 5.3 MPa)

and a low pressure display range 30in.Hg to 551 psi (–0.1

to 3.8 MPa).

To increase pressure resistance, the hose material and

Charging hose

base size were changed.

A conventional (R22) vacuum pump can be used by

installing a vacuum pump adapter.

Vacuum pump

Be sure that the pump oil does not backflow into the

system. Use one capable for vacuum suction of 5 Torr,

–755 mmHg (–100.7 kPa).

Gas leakage detector

Special gas leakage detector for HFC refrigerant R410A.

2.3. Accessories

For installation purposes, be sure to use the parts supplied by the manufacturer or

other prescribed parts.

The use of non-prescribed parts can cause serious accidents such as the unit to fall,

water leakage, electric shock, or ﬁ re.

The following installation parts are furnished. Use them as required.

Keep the Installation Manual in a safe place and do not discard any other accessories

until the installation work has been completed.

Do not discard any accessories needed for installation until the installation work has been

completed.

WARNING

Contents of change

WARNING

Name and Shape

Operating Manual

Installation Manual

Wall hook bracket

Cable tie

Cloth tape

Tapping screw (M4×25mm)

Connecting cable

Air cleaning filter

Air cleaning filter frame

Seal A

2.4. Optional parts

Description

Model

UTY-XWZXZC

UTY-XWZXZB

External connect kit

UTY-XWZXZD

UTY-XWZXZ7

UTY-XWZXZE

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

Correct initial installation location is important because it is difﬁ cult to move unit after it is

installed.

3.1. Selecting an installation location

Select installation locations that can properly support the weight of the indoor. Install

the units securely so that they do not topple or fall.

Q'ty

Application

(This book)

For indoor unit installation

For remote controller cable binding

For indoor unit installation

For wall hook bracket installation

For wired remote controller installation

For installation, refer to the

"CLEANING AND CARE" in the

operating manual.

For indoor unit installation

Application

For output function

(Output terminal / CNB01)

For control input function

(Apply voltage terminal / CNA01)

For control input function

(Dry contact terminal / CNA02)

For forced thermostat off function

(Apply voltage terminal / CNA03)

For forced thermostat off function

(Dry contact terminal / CNA04)

WARNING

En-2