EN
ES
FR
IT
DE
PT
PL
CZ
RU
CR
HU
TR
NL
GR
SV
FI
NO
DK
RO
BG
EE
LV
SK
SI
7
90°
Obliquity
Roughness
Warp
CAUTION
Refrigerant Piping Connection
1. Cut the pipe with a pipe cutter.
2. Insert a
fl
are nut into the pipe and
fl
are the pipe.
•
Projection margin in
fl
aring : A (Unit : mm)
RIDGID
(clutch type)
IMPERIAL
(wing nut type)
Outer dia. of copper pipe
R410A
Ø6.35 mm
1.5 to 2.0
Ø12.70 mm
2.0 to 2.5
Align the centers of the connecting pipes and tighten the
fl
are nut as far as
possible with your
fi
ngers. Then tighten the nut with a spanner and torque
wrench as shown in the
fi
gure.
Tightening connection
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
(Unit : N·m)
Outer dia. of copper pipe
Tightening torque
Ø6.35 mm
16 to 18 (1.6 to 1.8 kgf·m)
Ø12.70 mm
50 to 62 (5.0 to 6.2 kgf·m)
Evacuating
After the piping has been connected to the indoor unit, you can perform the
air purge together at once.
Outer dia.
of copper pipe
R410A tool used
Conventional tool
used
Ø6.35 mm
0 to 0.5
1.0 to 1.5
Ø12.70 mm
0 to 0.5
1.0 to 1.5
Flaring
Be sure to use a vacuum pump with counter-
fl
ow prevention function so
that inside oil of the pump does not
fl
ow backward into pipes of the air
conditioner when the pump stops.
(If oil inside of the vacuum pump enters the air conditioner, which use
R410A, refrigeration cycle trouble may result.)
1. Connect the charge hose from the manifold valve to the service port of
the packed valve at gas side.
2. Connect the charge hose to the port of the vacuum pump.
3. Open fully the low pressure side handle of the gauge manifold valve.
4. Operate the vacuum pump to start evacuating. Perform evacuating for
about 15 minutes if the piping length is 20 meters. (15 minutes for 20
meters) (assuming a pump capacity of 27 liters per minute) Then con
fi
rm
that the compound pressure gauge reading is –101 kPa (–76 cmHg).
5. Close the low pressure side valve handle of the gauge manifold valve.
6. Open fully the valve stem of the packed valves (both gas and liquid sides).
7. Remove the charging hose from the service port.
8. Securely tighten the caps on the packed valves.
Packed valve at liquid side
Service port (Valve core (Setting pin))
Packed valve at gas side
Vacuum
pump
Vacuum pump adapter for
counter-
fl
ow prevention
(For R410A only)
Charge hose
(For R410A only)
Handle Hi
(Keep full closed)
Manifold valve
Pressure gauge
Compound pressure gauge
Handle Lo
Charge hose
(For R410A only)
Connecting pipe
–101 kPa
(–76 cmHg)
•
KEEP IMPORTANT 5 POINTS FOR PIPING WORK.
(1) Take away dust and moisture (inside of the connecting pipes).
(2) Tighten the connections (between pipes and unit).
(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
(4) Check gas leak (connected points).
(5) Be sure to fully open the packed valves before operation.
CAUTION
Wiring Connection
1. Remove the valve cover, the electric parts cover and the cord clamp from
the outdoor unit.
2. Connect the connecting cable to the terminal as identi
fi
ed by the
matching numbers on the terminal block of indoor and outdoor unit.
3. Insert the power cord and the connecting cable carefully into the terminal
block and secure it tightly with screws.
4. Use vinyl tape, etc. to insulate the cords which are not to be used.
Locate them so that they do not touch any electrical or metal parts.
5. Secure the power cord and the connecting cable with the cord clamp.
6. Attach the electric parts cover and the valve cover on the outdoor unit.
Using a vacuum pump
A
Pipe
Die
•
Tightening torque of
fl
are pipe connection
Flare at
indoor unit side
Flare at
outdoor unit side
Half union
Flare nut
Externally
threaded side
Internally
threaded side
Use a wrench to secure.
Use a torque wrench to tighten.
Packed valve handling precautions
• Open the valve stem all the way out, but do not try to open it beyond the
stopper.
• Securely tighten the valve cap with torque in the following table:
Pipe size of Packed Valve
Size of Hexagon wrench
12.70 mm and smallers
A = 4 mm
15.88 mm
A = 5 mm
A
H
Hexagon wrench
is required.
Cap
Cap Size
(H)
Torque
Valve Rod
Cap
H17 - H19
14~18 N·m
(1.4 to 1.8 kgf·m)
H22 - H30
33~42 N·m
(3.3 to 4.2 kgf·m)
Service
Port Cap
H14
8~12 N·m
(0.8 to 1.2 kgf·m)
H17
14~18 N·m
(1.4 to 1.8 kgf·m)
Service Port Cap
Valve Rod Cap
Evacuate the air in the connecting pipes and in the indoor unit using a
vacuum pump. Do not use the refrigerant in the outdoor unit. For details,
see the manual of the vacuum pump.
AIR PURGE
TO CHARGE REFRIGERANT
Refrigerant
RAS-18BAS-HK
Non refrigerant charging
Less than 15 m
Refrigerant charging
15 – 20 m (20g/m)
01_1115551255-EN.indd 7
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9/7/2558 BE 5:06 PM
9/7/2558 BE 5:06 PM
