Special Tools For R410A; Accessories; System Confi Guration - Fujitsu aoyg18lac2 Installation Manual

2. 2.

Special tools for R410A

Tool name
Pressure is high and cannot be measured with a conventional
gauge. To prevent erroneous mixing of other refrigerants, the
diameter of each port has been changed.
Gauge manifold
It is recommended the gauge with seals -0.1 to 5.3 MPa
(-1 to 53 bar) for high pressure. -0.1 to 3.8 MPa (-1 to 38 bar)
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
Special gas leakage detector for HFC refrigerant R410A.
detector
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. Do not use copper pipes having a collapsed, deformed or
discolored portion (especially on the interior surface). Otherwise, the expansion valve or
capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using conventional
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 that in the table even when it is available on the market.
Thicknesses of Annealed Copper Pipes (R410A)
Pipe outside diameter
6.35 mm (1/4 in.)
9.52 mm (3/8 in.)
12.70 mm (1/2 in.)
15.88 mm (5/8 in.)
19.05 mm (3/4 in.)
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 falling, water leakage, electric shock, or fi re.
Do not throw away the connecting parts until the installation has been complete.
Name and shape
Installation Manual
Drain pipe
Adapter assy
9.52 mm ➝ 12.7 mm
2. 4.

System confi guration

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
Contents of change
Thickness
0.80 mm
0.80 mm
0.80 mm
1.00 mm
1.20 mm
WARNING
Q'ty Description
This manual
1
For outdoor unit drain piping work
[Heat & Cool model (Reverse cycle)
1
only]
For use when connecting model
14 to outdoor port A or B
[18 type only]
1
Unit B
b
7-14
H1
H2
H1
Unit A
a
7-14
Indoor unit
2. 4. 1. CONNECTABLE INDOOR UNIT CAPACITY TYPE
The total capacity of the indoor units connected must be between 14,000 and
24,000BTU.
Be sure to check the connecting pattern in technical manual when installed since
connection pattern is specifi ed in it. Operation cannot be guaranteed if connected by a
method not specifi ed 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
*1 When connecting model 14 to the outdoor unit the included adapter is necessary.
(For more information, refer to 4.1.3. How to use adapter.)
OUTDOOR UNIT : 14 TYPE
Power Source
Power cable
230V~50Hz
Circuit breaker
Connection
cable
Outdoor unit
Refrigerant
pipe
2. 4. 2. CONNECTABLE INDOOR UNIT CAPACITY TYPE
The total capacity of the indoor units connected must be between 14,000 and
21,000BTU.
Be sure to check the connecting pattern in technical manual when installed since
connection pattern is specifi ed in it. Operation cannot be guaranteed if connected by a
method not specifi ed 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
CAUTION
Connectable model name
7-12/14*1
7-12/14*1
UNIT B ø6.35, ø9.52
UNIT A ø6.35, ø9.52
Unit B
b
7-12
H1
H2
H1
Unit A
a
7-12
Indoor unit
CAUTION
Connectable model name
7-12
7-12
En-2