Pipe Installation; Selecting The Pipe Material - Fujitsu AIRSTAGE UTP-VX30A Installation Manual

4.3.1.3. Mounting Secure Fittings (If Using 1 EEV unit)
(1) Use the 8 screws (accessories) to secure the secure fi ttings (accessories).
Secure fi tting (Accessories)
4.3.1.4. Mounting Secure Fittings (If Using 2 EEV units)
(1) If using 2 EEV units, stacking the 2 kits is recommended.
If stacking 2 EEV units, secure using the secure fi ttings (accessories) and screws
(accessories).
4.3.1.5. Installing EEV units
Mount the EEV unit to the wall.
Select the securing method according to the installation environment.
Method 1: Use the 8 screws (accessories) to secure the unit.
Method 2: Mount the 4 anchor bolts (fi eld supply) to the wall, and then secure the unit.
Method 1
Screws M4×L16
(Accessories)
Tightening torque
0.8 to 2.8 Nm
M4 screw
(8 to 28 kgf·cm)
Screws M4×L10 (Accessories)
Screws M4×L10
(Accessories)
Secure fi tting (Accessories)
Method 2
Nuts and washers
(Field supply)
Installable EEV unit orientations
Orient the arrow upwards
Installable both indoors and outdoors
A A
B B
Installable indoors only
(Cannot be installed outdoors)
A A
B B
Prohibited EEV unit orientations
PROHIBITED
B B
A A

5. PIPE INSTALLATION

Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with
refrigerant R410A models. Also, when storing the piping, securely seal the openings
by pinching, taping, etc.
While welding the pipes, be sure to blow dry nitrogen gas through them.

5.1. Selecting the pipe material

Do not use existing pipes from another refrigeration system or refrigerant.
Use pipes that have clean external and internal sides without any contamination which
may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.
It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 40 mg/10 m.
Do not use copper pipes that have a collapsed, deformed, or discolored portion
(especially on the interior surface). Otherwise, the expansion valve or capillary tube
may become blocked with contaminants.
Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary
to choose adequate materials.
• Thicknesses of copper pipes used with R410A are as shown in the table.
• Never use copper pipes thinner than those indicated in the table even if they are
available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter [mm (in.)] Thickness [mm]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
22.22 (7/8)
28.58 (1-1/8)
EEV unit inclination limits
±10° or
less
±10° or
less
B B
A
CAUTION
CAUTION
Material
0.80
0.80
COPPER
0.80 JIS H3300 C1220T-O
or equivalent
1.00
1.20
COPPER
1.00
JIS H3300 C1220T-H
1.00
or equivalent
A
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