General Specification; Type Of Copper Pipe And Insulation Material; Additional Materials Required For Installation; Pressure Is High And Cannot Be Measured With A Conven - Fujitsu 9319357041 Installation Manual

2.2. Special tools for R410A
Tool name

Pressure is high and cannot be measured with a conven-

tional (R22) gauge. To prevent erroneous mixing of other

Gauge manifold refrigerants, the diameter of each port has been changed.
It is recommended the gauge with seals -0.1 to 5.3 MPa
(30 inHg to 768 psi) for high pressure.
-0.1 to 3.8 MPa (30 inHg to 551 psi) for low pressure.
To increase pressure resistance, the hose material and base
Charge hose
size were changed.
A conventional vacuum pump can be used by installing a
Vacuum pump
vacuum pump adapter.
Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of residual
oil is less than 40 mg/10 m (0.004 oz/100 ft.). Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the expansion
value or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is nec-
essary to choose adequate materials.
Do not use the existing (for R22) piping and fl are nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise and
cause failure, injury, etc. (Use the special R410A materials.)
When installing and relocating the air conditioner, do not mix gases other than the
specifi ed refrigerant (R410A) to enter the refrigerant cycle.
If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to
an abnormally high value and cause failure, injury, etc.
2.3. For authorized service personnel only.
For the air conditioner to operate satisfactorily, install it as outlined in this installation
manual.
Connect the indoor unit and outdoor unit or branch box with the air conditioner piping
and cables available from your local distributor. This installation manual describes the
correct connections using the installation set available from your local distributor.
Do not turn on the power until all installation work is complete.
This installation manual describes how to install the indoor unit only.
To install the outdoor unit or branch box, refer to the installation manual included with
the outdoor unit or branch box.
• Be careful not to scratch the air conditioner when handling it.
• After installation, explain correct operation to the customer, using the operating manual.
2.4. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape Q'ty
Operating manual
Installation manual
(This manual)
Wall hook bracket
Contents of change
WARNING
WARNING
CAUTION
Name and Shape
Remote controller
holder
1
Cloth tape
1
Tapping screw
(big)
1
Name and Shape
Remote controller
Battery
Seal A
It is used when the diameter of
gas pipe is Ø12.70 or more.
It is necessary when using AS15.
The following items are necessary to install this air conditioner. (The items are not includ-
ed with the air conditioner and must be purchased separately.)
Name
Connection pipe assembly
Connection cable (4-conductor)
Wall pipe
Decorative tape
Vinyl tape
2.5. Optional parts
Refer to each installation manual for the method of installing optional parts.
Parts name
Wired remote controller *
Simple remote controller *
External connect kit *
Communication kit
* Optional communication kit is necessary for the installation.

3. GENERAL SPECIFICATION

This installation manual briefl y outlines where and how to install the air conditioning system. Please
read over the entire set of instructions for the indoor and outdoor units and make sure all accessory
parts listed are with the system before beginning.

3.1. Type of copper pipe and insulation material

Refer to the installation manual for the outdoor unit for description of allowable pipe length
and height difference.
Selecting pipe sizes
The diameters of the connection pipes according to the capacity of the indoor unit.
Refer to the following table for the proper diameters of the connection pipes between the
indoor unit and outdoor unit or branch box.
Indoor unit Gas pipe outside diameter
capacity [mm (in.)]
9, 12 9.52 (3/8)
Q'ty
15 12.70 (1/2)
1
Install heat insulation around both the gas and liquid pipes. Failure to do so may
cause water leaks.
Use heat insulation with heat resistance above 120 °C (248 °F). (Reverse cycle model
only.)
In addition, if the humidity level at the installation location of the refrigerant piping is
expected to exceed 70%, install heat insulation around the refrigerant piping. If the
expected humidity level is 70-80%, use heat insulation that is 15 mm (19/32 in.) or
1
thicker and if the expected humidity exceeds 80%, use heat insulation that is 20 mm
(25/32 in.) or thicker.
If heat insulation is used that is not as thick as specifi ed, condensation may form on the surface
of the insulation.
In addition, use heat insulation with heat conductivity of 0.045 W/(m•K) or less 20 °C (68 °F).
5

3.2. Additional materials required for installation

A. Refrigeration (armored) tape
B. Insulated staples or clamps for connecting wire (See your local electrical codes.)
C. Putty
D. Refrigeration lubricant
E. Clamps or saddles to secure refrigerant piping
Q'ty Name and Shape
Tapping screw
(small)
1
Air cleaning filter
2
1
Q'ty Name
1 Wall cap
1 Saddle
1 Drain hose
1 Tapping screws
1 Sealant
Model No. Application
UTY-RNNUM For air conditioner operation
UTY-RSNUM For air conditioner operation
UTY-XWZXZ5 For control input/output port
UTY-TWBXF For the installation of optional parts
CAUTION
Liquid pipe outside diameter
[mm (in.)]
6.35 (1/4)
CAUTION
Q'ty
2
2
Q'ty
1
1 set
1
1 set
1
Thickness
[mm (in.)]
0.8
(0.0315)
En-3