17-EN
18-EN
Projection margin in
fl
aring: B (unit: mm)
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
Ø6.35, Ø9.52
0.5 to 1.0
1.0 to 1.5
Ø12.70
0.5 to 1.1
1.5 to 2.0
B
Flaring diameter size: A (unit: mm)
Outer dia. of copper pipe
A
+0
-0.4
Ø6.35
9.1
Ø9.52
13.2
Ø12.70
16.6
A
*
In case of
fl
aring for R410A with the conventional
fl
are tool, pull it out approx. 0.5 mm more than that
for R22 to adjust to the speci
fi
ed
fl
are size. The
copper pipe gauge is useful for adjusting projection
margin size.
•
The sealed gas was sealed at the atmospheric
pressure so when the
fl
are nut is removed, there
will no “whooshing” sound: This is normal and is not
indicative of trouble.
•
Use two wrenches to connect the indoor unit pipe.
Work using double spanner
•
Use the tightening torque levels as listed in the table
below.
(Unit: N·m)
Outer dia. of copper pipe
Tightening torque
Ø6.35 mm
16 to 18 (1.6 to 1.8 kgf·m)
Ø9.52 mm
30 to 42 (3.0 to 4.2 kgf·m)
Ø12.70 mm
50 to 62 (5.0 to 6.2 kgf·m)
•
Tightening torque of
fl
are pipe connections.
Pressure of R410A is higher than that of R22.
(approx. 1.6 times) Therefore, using a torque
wrench, tighten the
fl
are pipe connecting sections
which connect the indoor and outdoor units of the
speci
fi
ed tightening torque.
Incorrect connections may cause not only a gas
leak, but also a trouble of the refrigeration cycle.
CAUTION
Tightening with an excessive torque may crack the
nut depending on installation conditions.
■
Evacuation
Perform vacuuming from the charge port of valve of
the outdoor unit by using a vacuum pump.
For details, follow to the Installation Manual attached
to the outdoor unit.
•
Do not use the refrigerant sealed in the outdoor unit
for evacuation.
REQUIREMENT
For the tools such as charge hose, use those
manufactured exclusively for R410A.
Refrigerant amount to be added
For addition of the refrigerant, add refrigerant “R410A”
referring to the attached Installation Manual of outdoor
unit.
Use a scale to charge the refrigerant of specified
amount.
REQUIREMENT
•
Charging an excessive or too little amount of
refrigerant causes a trouble of the compressor.
Charge the refrigerant of speci
fi
ed amount.
•
A personnel who charged the refrigerant should
write down the pipe length and the added
refrigerant amount in the F-GAS label of the
outdoor unit. It is necessary to
fi
x the compressor
and refrigeration cycle malfunction.
– 9 –
Open the valve fully
Open the valve of the outdoor unit fully. A hexagonal
wrench is required for opening the valve.
For details, refer to the Installation Manual attached to
the outdoor unit.
Hexagonal wrench size
SM30 type
4 mm
SM40 type
6 mm
Gas leak check
Check with a leak detector or soap water whether gas
leaks or not, from the pipe connecting section or cap
of the valve.
REQUIREMENT
Use a leak detector manufactured exclusively for
HFC refrigerant (R410A, R134a).
Heat insulation process
•
For the heat insulation to the pipes at gas side,
be sure to use the material with heat-resisting
temperature 120 °C or higher.
•
To use the attached heat insulation pipe, apply the
heat insulation to the pipe connecting section of the
indoor unit securely without gap.
REQUIREMENT
Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (the pipe exposed to
the outside causes water leak.)
■
Wireless remote controller
A-B selection
Using 2 wireless remote controllers for the respective
air conditioners, when the 2 air conditioners are
closely installed.
Wireless remote controller B setup
1
Push
TEMPORARY button on the indoor
unit to turn the air conditioner ON.
2
Point the wireless remote controller at the
indoor unit.
3
Push and hold
CHK
button on the wireless
remote controller by the tip of the pencil.
“00” will be shown on the display.
4
Push
MODE
during pushing
CHK
. “B” will be
shown on the display and “00” will be
disappear and the air conditioner will turn
OFF. The wireless remote controller B is
memorized.
PRESET
FAN
“B” Display
“00” Display
NOTE
•
Repeat above step to reset wireless remote
controller to be A.
•
The wireless remote controllers do not display “A”.
•
The factory default of the wireless remote
controllers is “A”.
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10/13/14 9:13 AM
