Toshiba RAV-SM566KRT-E Installation Manual Download Page 10

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Projection margin in flaring: B (unit: mm)

Flaring diameter size: A (unit: mm)

* In case of flaring for R410A with the conventional

flare tool, pull it out approx. 0.5 mm more than that

for R22 to adjust to the specified flare size. The

copper pipe gauge is useful for adjusting projection

margin size.

• The sealed gas was sealed at the atmospheric

pressure so when the flare 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.

• Use the tightening torque levels as listed in the table

below.

• Tightening torque of flare pipe connections.

Pressure of R410A is higher than that of R22.
(approx. 1.6 times) Therefore, using a torque
wrench, tighten the flare pipe connecting sections
which connect the indoor and outdoor units of the
specified 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 specified 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 fix the compressor and refrigeration
cycle malfunction.

Outer dia. of

copper pipe

R410A tool used

Conventional

tool used

6.4, 9.5

0 to 0.5

1.0 to 1.5

12.7, 15.9

Outer dia. of copper pipe

+0
–0.4

6.4

9.1

9.5

13.2

12.7

16.6

15.9

19.7

Work using double spanner

Outer dia. of connecting

pipe (mm)

Tightening torque (N•m)

6.4

14 to 18 (1.4 to 1.8 kgf•m)

9.5

33 to 42 (3.3 to 4.2 kgf•m)

12.7

50 to 62 (5.0 to 6.2 kgf•m)

15.9

63 to 77 (6.3 to 7.7 kgf•m)

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.

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

Push TEMPORARY

button on the indoor

unit to turn the air conditioner ON.

Point the wireless remote controller at the
indoor unit.

Push and hold

button on the wireless

remote controller by the tip of the pencil.
“00” will be shown on the display.

Push during pushing

. “B” will be