Accessories; Pipe Requirements - Fujitsu AOYG18KBTA2 Installation Manual

2.2. 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 falling, water leakage, electric shock, or fire.
• The following installation parts are supplied. 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.
Name and shape
Installation Manual
Drain pipe

2.3. Pipe requirements

• Do not use existing pipes.
• 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
R32(R410A) incurs pressure higher than when using conventional refrigerant, it is
necessary to choose adequate materials.
• Thicknesses of copper pipes used with R32(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
Pipe outside diameter [mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
■ Protection of pipes
• Protect the pipes to prevent the entry of moisture and dust.
• Especially, pay attention when passing the pipes through a hole or connecting the
end of a pipe to the outdoor unit.
Location Working period
1 month or more
Outdoor
Less than 1 month
Indoor
■ Refrigerant pipe size and allowable piping length
• Keep the piping length between the indoor unit and outdoor unit within the allowable
tolerance.
• The maximum lengths of this product are shown in the table. If the units are further
apart than this, correct operation cannot be guaranteed.
En-4
WARNING
Q'ty Description
This manual
1
For outdoor unit drain piping work
[Heat & Cool model (Reverse cycle)
1
only]
CAUTION
Thickness [mm]
0.80
0.80
0.80
1.00
1.20
Protection method
Pinch pipes
Pinch or tape pipes
- Pinch or tape pipes
CAUTION
Layout example for the indoor units and outdoor unit.
OUTDOOR UNIT : 18 TYPE
Power Source
Power cable
230V~50Hz
Circuit breaker
Connection
cable
Outdoor unit
Refrigerant
pipe
● Connectable indoor unit capacity type
• The total capacity of the indoor units connected must be between 14,000 and
26,000BTU.
• Be sure to check the connecting pattern in technical manual when installed since
connection pattern is specified in it. Operation cannot be guaranteed if connected by
a method not specified in it. It can cause the fault of the product.
• Please connect to both of indoor unit and outdoor unit certainly.
• To install an indoor unit, refer to the installation Manual included with the indoor unit.
Outdoor port
A
B
OUTDOOR UNIT : 14 TYPE
Power Source
Power cable
230V~50Hz
Circuit breaker
Connection
cable
Outdoor unit
Refrigerant
pipe
Unit B
b
7-14
H1
H1
Unit A
a
7-14
Indoor unit
CAUTION
Connectable model name
7-14
7-14
UNIT B ø6.35, ø9.52
UNIT A ø6.35, ø9.52
Unit B
b
7-12
H1
H1
Unit A
a
7-12
Indoor unit
H2
H2