High Wall, Heat Pump Type
Service Manual
66
Toshiba
4) When water still leaks even after performing
steps 1) and 2), add caulking material, putty or
other sealants.
5) Install the drain nipple [7] and a commercially
available drain hose (with 16 mm inside
diameter), and drain off the water.
(For the position where the drain nipple g is
installed, refer to the installation diagram of the
indoor and outdoor units.)
6) Check that the outdoor unit is horizontal, and
route the drain hose at a downward sloped
angle with very little slack to the hose.
CAUTION
Do not use ordinary garden hose, which can flatten and
prevent drainage.
9-4-4. 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)
Imperial (Wing nut type)
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 centres 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.
[8] Water-proof rubber
caps (supplied with the
outdoor unit)
[7] Drain nipple
Base plate
Commercially available
drain hose
Base plate
[7] Drain nipple
Obliquity
Roughness
Warp
Outer diameter of
copper pipe
R410A tool used
Conventional tool
used
6.35
0 to 0.5
1.0 to 1.5
9.52
0 to 0.5
1.0 to 1.5
12.7
0 to 0.5
1.0 to 1.5
R410A tool used
Conventional tool used
0 to 0.5
1.0 to 1.5
0 to 0.5
1.0 to 1.5
0 to 0.5
1.0 to 1.5
Outer diameter of copper pipe
B
+0
–0.4
R410A
R22
6.35
9.1
9.0
9.52
13.2
13.0
12.7
16.6
16.2
Die
Pipe
Half union
Flare nut
Use a wrench to secure.
Internally threaed side
Use a torque wrench to tighten.
Externally threaded side
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 66 Wednesday, March 4, 2009 11:22 AM
