Refrigerant Piping Connection - Toshiba RAS-07PKVP-E Installation Manual

2. Install the drain nipple
inside diameter), and drain off the water.
(For the position where the drain nipple
diagram of the indoor and outdoor units.)
• Check that the outdoor unit is horizontal, and route the drain hose at a
downward sloped angle with very little slack to the hose.

Refrigerant Piping Connection

Flaring
1. Cut the pipe with a pipe cutter.
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring: A (Unit: mm)
Rigid (Clutch type)
Outer diameter of copper pipe
6.35
9.52
12.7
Die
Pipe
3. Flaring size : B (Unit : mm)
• In case of flaring for R410A with the conventional flare tool, pull it out approx. 0.5 mm more than that of R22 to adjust the
specified flare size. The copper pipe gauge is useful for adjusting projection margin size.
Tighten the connection
Align the centers of the connecting pipes and tighten the flare nut as much as possible with your fingers. Then tighten the nut with a
wrench and torque wrench as shown in the figure.
CAUTION
• Do not apply excessive force. Otherwise, the nut may break.
and a commercially available drain hose (with 16 mm
g
is installed, refer to the installation
g
Imperial (Wing nut type)
Outer diameter of copper pipe
Outer diameter of copper pipe
Half union
Externally threaded side
Use a wrench to secure.
Base plate
Obliquity
R410A tool used
0 to 0.5
0 to 0.5
0 to 0.5
6.35
9.52
12.7
6.35
9.52
12.7
Flare nut
Internally threaded side
Use a torque wrench to tighten.
15
g Drain nipple
Do not use ordinary garden hose, which can flatten and
prevent drainage.
Warp
Roughness
Conventional tool used
1.0 to 1.5
1.0 to 1.5
1.0 to 1.5
R410A
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
+0
B
–0.4
R410A
9.1
13.2
16.6
Commercially available
drain hose
R22
9.0
13.0
16.2
EN