Refrigerant Piping - Toshiba RAV-RM561FT-EN Instrucciones De Montaje

• To connect drain hose on left
Refrigerant
Drain pan
piping
PVC pipe
(Drain piping)
Drain hose
Heat
Fix with binding band.
insulator
Fix the drain hose to the refrigerant pipe
with binding bands without hanging down
and slack. fix 3 points
Do not bind the drain hose and refrigerant
pipe (heat insulator) too tight.
*Connect and fix drain pipe at outside of the unit on site.
Install the drain hose with gradient of 1/100 or more to
connect it to unit on both left and right sides.
 Check the draining
• After piping work has been completed, remove the air intake grille and pour water in the drain pan to check water
drain and that there is no water leakage from connecting part of the drain hose.
• After check of the water drain, attach the air intake grille as before.
119-EN
• To connect drain hose on right
Drain pan
PVC pipe
(Drain piping)
Drain hose
Heat insulator
6

Refrigerant piping

CAUTION
• Use flare nuts that are included with the unit. Using
different flare nuts may cause refrigerant gas
leakage.
• After refrigerant piping has been connected, do not
turn on the power until gas leakage check is finished.
If refrigerant gas leaks, refrigerant leak detection
sensor operates and a fan automatically rotates,
causing air conditioner not to operate.
 Refrigerant piping
Use the following item for the refrigerant piping.
Material: Seamless phosphorous deoxidized
copper pipe.
Ø6.35, Ø9.52, Ø12.7 Wall thickness 0.8 mm or more
Ø15.88 Wall thickness 1.0 mm or more
REQUIREMENT
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 - 3 m to clamp the refrigerant
pipe. Otherwise, abnormal sound may be generated.
CAUTION
IMPORTANT 4 POINTS FOR PIPING WORK
1. Reusable mechanical connectors and flared joints are
not allowed indoors. When mechanical connectors
are reused indoors, sealing parts shall be renewed.
When flared joints are reused indoors, the flare part
shall be refabricated.
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes by using
VACUUM PUMP.
4. Check the gas leakage. (Connected points)
 Pipe size
Model
RAV- RM56 type RM110 to RM160
name
Gas side 12.7 mm
Pipe size
Liquid side 6.4 mm
– 60 –
 Permissible piping length and
height difference
They vary according to the outdoor unit.
For details, refer to the Installation Manual attached to
the outdoor unit.
Flaring
• Cut the pipe with a pipe cutter.
Remove burrs completely.
Remaining burrs may cause gas leakage.
• Insert a flare nut into the pipe, and flare the pipe.
As the flaring sizes of R32 or R410A differ from those
of refrigerant R22, the flare tools newly
manufactured for R32 or 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)
Outer dia. of R32 or R410A
copper pipe tool used
6.4, 9.5
0 - 0.5
12.7, 15.9
▼ Flaring dia. meter size: A (Unit: mm)
Outer dia. of
+0
A
copper pipe –0.4
6.4 9.1
9.5 13.2
12.7 16.6
15.9 19.7
CAUTION
• Do not scratch the inner surface of the flared part
when removing burrs.
• Flare processing under the condition of scratches on
the inner surface of flare processing part will cause
RM80,
refrigerant gas leak.
• Check that the flared part is not scratched, deformed,
type
stepped, or flattened, and that there are no chips
15.9 mm
adhered or other problems, after flare processing.
9.5 mm
• Do not apply refrigerating machine oil to the flare
surface.
B
Conventional
tool used
1.0 - 1.5
A
120-EN