Connection Of Refrigerant Pipe - Toshiba MMC-AP0151H Manuel D'installation

5
REFRIGERANT PIPING
Refrigerant piping
• The connecting sections of the refrigerant pipes are
provided at the positions in the figure below.
(Refrigerant piping can be connect 3 directions)
Upper side
Rear side
Right
1. Use copper pipe with 0.8 mm or more thickness.
(In case pipe size is Ø15.9, with 1.0mm or more.)
2. Flare nut and flare works are also different from
those of the conventional refrigerant.
Take out the flare nut attached to the unit of the air
conditioner, and use it.
Pipe forming/End positioning
Flaring
1. Cut the pipe with a pipe cutter.
90˚
2. Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R410A differ from those of
refrigerant R22, the flare tools newly manufactured
for R410A are recommended.
However, the conventional tools can be used by
adjusting projection margin of the copper pipe.
• Projection margin in flaring :
B (Unit : mm)
Rigid (Clutch type)
R410A tool used
Outer diam. of
copper pipe
R410A
6.4 0 to 0.5 (Same as left)
9.5 0 to 0.5 (Same as left)
12.7 0 to 0.5 (Same as left)
15.9 0 to 0.5 (Same as left)
* When using the drain up
kit sold separately, the pipe
can be drawn out only from
the upper side.
Obliquity Roughness Warp
Conventional tool used
R22 R410A R22
1.0 to 1.5 0.5 to 1.0
1.0 to 1.5 0.5 to 1.0
1.0 to 1.5 0.5 to 1.0
1.0 to 1.5 0.5 to 1.0
Imperial (Wing nut type)
Outer diam. of copper pipe
6.4
9.5
12.7
15.9
• Flaring diam. meter size :
A (Unit : mm)
Outer diam. of copper pipe
6.4
9.5
12.7
15.9
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.

Connection of refrigerant pipe

Connect all the refrigerant pipes with flare connecting
work.
• Since the atmospheric pressure only is sealed
as the sealing gas, it is not abnormal that
"Pushu..." sound is not heard when the flare
nut is removed.
• Be sure to use a double spanner for pipe
connecting work of the indoor unit.
B
• Refer to the following table for tightening torque.
Connecting pipe
outer dia. (mm)
Ø6.4
Ø9.5
Ø12.7
Ø15.9
11
R410A
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
2.0 to 2.5
R410A
9.1
13.2
16.6
19.7
Work using double spanner
Tightening torque
(N•m)
11.8 (1.2 kgf•m)
33.0 (3.3 kgf•m)
49.0 (5.0 kgf•m)
68.0 (6.8 kgf•m)
R22
1.0 to 1.5
1.0 to 1.5
1.5 to 2.0
1.5 to 2.0
A
+0
A
- 0.4
R22
9.0
13.0
16.2
19.2
Re-tightening
torque (N•m)
13.7 (1.4 kgf•m)
36.0 (3.6 kgf•m)
53.9 (5.5 kgf•m)
78.4 (8.0 kgf•m)