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Flaring work
Measurement B
Copper pipe
Clutch type flare tool
diameter
for R410A
6.35
9.52
Flaring block
12.7
Copper pipe
Air purge
① Tighten all flare nuts in the pipings both indoor and
outside wall so as not to cause leak.
② Connect operation valve, charge hose, manifold valve
and vacuum pump as is illustrated right.
③ Open manifold valve handle Lo to its full width, and
perform vacuum or evacuation.
Continue the vacuum or evacuation operation for 15
minutes or more and check to see that the vacuum
gauge reads -0.1MPa.
④ After completing vacuum operation, close the Lo
handle and stop operation of the vacuum pump.
⑤ After completing vacuum operation, fully open
operation valve (Both gas and liquid sides) with
hexagon headed wrench.
⑥ Check for possible leakage of gas in the connection
parts of both indoor and outdoor.
●
Since the system uses check joints differing in diameter from those found on the conventional models, a charge hose
(for R22) presently in use is not applicable. Please use one designed specifically for R410A.
●
Please use an anti-reverse flow type vacuum pump adapter so as to prevent vacuum pump oil from running back
into the system. Oil running back into an air-conditioning system may cause the refrigerant cycle to break down.
INSTALLATION TEST CHECK POINTS
Check the following points again after completion of the installation, and before turning on the power. Conduct a test run again and ensure that the unit operates properly.
At the same time, explain to the customer how to use the unit and how to take care of the unit following the instruction manual.
After installation
The power supply voltage is correct as the rating.
No gas leaks from the joints of the operation valve.
Power cables and crossover wires are securely fixed
to the terminal board.
The screw of the lid is tightened securely.
The screw of the service panel is tightened securely.
Operation valve is fully open.
The pipe joints for indoor and outdoor pipes have been insulated.
Measurement B (mm)
Use a flare tool designed for R410A or a conventional flare
Conventional (R22) flare tool
tool. Please note that measurement B (protrusion from the
Clutch type Wing nut type
flaring block) will vary depending on the type of a flare tool in
use. If a conventional flare tool is used, please use a copper
0.0~0.5
1.0~1.5
1.5~2.0
pipe gauge or a similar instrument to check protrusion so
0.0~0.5
1.0~1.5
1.5~2.0
that you can keep measurement B to a correct value.
0.0~0.5
1.0~1.5
2.0~2.5
Operation valve
cap
Operation valve
(two-way valve)
-0.1MPa
(-76cmHg)
Handle Lo
Operation valve
(three-way valve)
Operation valve
cap
Check joint
Charge hose (Designed specifically for R410A)
Securely tighten the operation valve cap and the check joint blind nut after adjustment.
Operation valve size
Operation valve cap
(mm)
tightening torque (N·m)
φ6.35 (1/4")
20∼30
9
5 .
2
3 (
8 /
) "
φ
φ12.7 (1/2")
25∼35
Test run
Air conditioning operation is normal.
No abnormal noise.
Water drains smoothly.
Protective functions are not working.
The remote control is normal.
Do not apply excess torque to the flared nuts.
Otherwise, the flared nuts may crack depending on the
conditions and refrigerant leak may occur.
Insulation of the connection portion
Compound pressure gauge
Pressure gauge
Cover the coupling with insulator and then cover it with
Gauge manifold
(Designed specifically for R410A)
tape.
Handle Hi
Vinyl tape
Charge hose
(Designed specifically for R410A)
Vacuum pump adapter
(Anti-reverse flow type)
(Designed specifically for R410A)
Vacuum pump
Finishing work and fixing
Check joint blind nut
tightening torque (
)
Refrigerant piping
∼12
1
0
Drain hose
Wood screw
Clamp
Operation of the unit has been explained to the customer.
(Three-minute restart preventive timer)
When the air conditioner is restarted or when changing the
operation, the unit will not start operating for approximately
3 minutes. This is to protect the unit and it is not a malfunction.
( φ 12.7) : 49.0 ~ 61.0 N ・ m (4.9~6.1 kgf ・ m)
CAUTION
Place the slit
upward.
Cover the exterior portion
with outer tape and shape
Connection wiring,
the piping so it will match
Earth wiring
the contours of the route
Outer tape
that the piping to take.
Also fix the wiring and
pipings to the wall with
clamps.
RLC012A001A
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Troubleshooting
