Refrigerant Piping - Toshiba RAV-GV1101AT8P-E Installation Manual

5

Refrigerant piping

Refrigerant Piping
1. Use the following items for the refrigerant
piping.
Material : Seamless phosphorous deoxidized
copper pipe.
Ø9.52 Wall thickness 0.8 mm or more
Ø15.88 Wall thickness 1.0 mm or more
Do not use any copper pipes with a wall
thickness less than these thicknesses.
Removing service panel
Remove the screws at 2 locations and slide the
service panel down. Next, detach the right-side
claws followed by left-side claws to remove the
service panel.
When doing this, pulling the service panel towards
the front could damage the claws.
When attaching the service panel, attach the left
claws followed by the right claws and lift the service
panel upwards and secure it with screws in the 2
locations.
Service panel
(1)
Right-side plate
(2)
Left-side
Right-side
claws
claws
(3)
25-EN
Knockout of pipe cover
Knockout procedure
Rear direction
Pipe cover
Side direction
Front direction
Down direction
The indoor / outdoor connecting pipes can be
connected in 4 directions.
Take off the knockout part of the pipe cover through
which pipes or wires will pass through the base
plate.
Detach the pipe cover and tap on the knockout
section a few times with the shank of a screwdriver.
A knockout hole can easily be punched.
After punching out the knockout hole, remove burrs
from the hole and then install the supplied protective
bush and guard material around the passage hole to
protect wires and pipes.
Be sure to attach the pipe covers after pipes have
been connected. Cut the slits under the pipe covers
to facilitate the installation.
After connecting the pipes, be sure to mount the pipe
cover. The pipe cover is easily mounted by cutting off
the slit at the lower part of the pipe cover.
* Be sure to wear heavy work gloves while working.
– 13 –
Supplied protective bush
Supplied passage hole
guard material
* Attach the guard material
securely so that it does
not come loose.
Optional installation parts
(Locally procured)
Parts name
Refrigerant piping
A Liquid side: Ø9.5 mm
Gas side: Ø15.9 mm
Pipe insulating material
B
(polyethylene foam, 10 mm thick)
C Putty, PVC tape
Refrigerant piping connection
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)
Piping connection
Liquid side
Outer diameter Thickness
Ø9.5 mm
Gas side
Outer diameter Thickness
Ø15.9 mm
Flaring
1. Cut the pipe with a pipe cutter.
Be sure to remove burrs that may cause a gas leak.
2. Insert a flare nut into the pipe, and then flare the
pipe.
Use the flare nuts supplied with the air conditioner
or those for R32.
Insert a flare nut into the pipe, and flare the pipe.
Use the flare nuts supplied with the air conditioner
or flare nuts for R32 or R410A.
However, the conventional tools can be used by
adjusting the projection margin of the copper pipe.
Projection margin in flaring: B (Unit: mm)
Q'ty
One each
RIGID (Clutch type)
1
Outer dia. of
One each
Tool used
copper pipe
9.5
0 to 0.5
15.9
Flaring dia. size: A (Unit: mm)
A
Outer dia. of copper pipe
9.5
15.9
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
0.8 mm
cause refrigerant gas leak.
Check that the flared part is not scratched,
deformed, stepped, or flattened, and that there
are no chips adhered or other problems, after flare
processing.
1.0 mm
Do not apply refrigerating machine oil to the flare
surface.
B
Conventional
tool used
1.0 to 1.5
+0
A
–0.4
13.2
19.7
26-EN