En-2
Special tools for R410A
2. 2.
Tool name
Contents of change
Gauge manifold
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.
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.
Charge hose
To increase pressure resistance, the hose material and base
size were changed.
Vacuum pump
A conventional vacuum pump can be used by installing a
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. 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
Thickness
6.35 mm (1/4 in.)
0.80 mm
9.52 mm (3/8 in.)
0.80 mm
12.70 mm (1/2 in.)
0.80 mm
15.88 mm (5/8 in.)
1.00 mm
19.05 mm (3/4 in.)
1.20 mm
Accessories
2. 3.
WARNING
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
Q’ty
Description
Installation Manual
1
This manual
Drain pipe
1
For outdoor unit drain piping work
[Heat & Cool model (Reverse cycle)
only]
Adapter assy
9.52 mm
➝
12.7 mm
1
For use when connecting model
14 to outdoor port A or B
[18 type only]
System con
fi
guration
2. 4.
Layout example for the indoor units and outdoor unit.
OUTDOOR UNIT : 18 TYPE
H1
H2
H1
a
b
Outdoor unit
Indoor unit
Unit B
7-14
Connection
cable
Power cable
Circuit breaker
Power Source
230V~50Hz
Refrigerant
pipe
Unit A
7-14
CONNECTABLE INDOOR UNIT CAPACITY TYPE
2. 4. 1.
CAUTION
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 speci
fi
ed in it. Operation cannot be guaranteed if connected by a
method not speci
fi
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
Connectable model name
A
7-12/14*1
B
7-12/14*1
*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.)
UNIT B ø6.35, ø9.52
UNIT A ø6.35, ø9.52
OUTDOOR UNIT : 14 TYPE
H1
H2
H1
a
b
Outdoor unit
Indoor unit
Unit B
7-12
Connection
cable
Power cable
Circuit breaker
Power Source
230V~50Hz
Refrigerant
pipe
Unit A
7-12
CONNECTABLE INDOOR UNIT CAPACITY TYPE
2. 4. 2.
CAUTION
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 speci
fi
ed in it. Operation cannot be guaranteed if connected by a
method not speci
fi
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
Connectable model name
A
7-12
B
7-12
9379342070-02_IM.indb 2
9379342070-02_IM.indb 2
2011-12-21 11:13:39
2011-12-21 11:13:39
