Refrigerant Piping - Toshiba RAV-GM1101AT8P-E Installation Manual

5

Refrigerant piping

Refrigerant Piping
1. Use the following items 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
Do not use any copper pipes with a wall
thickness less than these thicknesses.
Removing service panel
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
claws
(3)
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Knockout of pipe cover
Knockout procedure
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.
Right-side Be sure to attach the pipe covers after pipes have
claws 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.
Optional installation parts
Rear direction
(Locally procured)
Pipe cover
Refrigerant piping
Side direction
A Liquid side: Ø9.5 mm
Gas side: Ø15.9 mm
Pipe insulating material
B
(polyethylene foam, 10 mm thick)
C P u t t , y P V C
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
Outer diameter
Ø9.5 mm
Outer diameter
Ø15.9 mm
– 12 –
Flaring
Supplied protective bush
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.
Supplied passage hole
Insert a flare nut into the pipe, and flare the pipe.
guard material
Use the flare nuts supplied with the air conditioner
* Attach the guard material
securely so that it does
or flare nuts for R32 or R410A.
not come loose.
However, the conventional tools can be used by
adjusting the projection margin of the copper pipe.
Projection margin in flaring: B (Unit: mm)
Parts name Q'ty
One each
Rigid (Clutch type)
1
Outer dia. of
a t p e O n e e a c h copper pipe
Flaring dia. size: A (Unit: mm)
Outer dia. of copper pipe
CAUTION
when removing burrs.
on the inner surface of flare processing part will
Liquid side
cause refrigerant gas leak.
Thickness
0.8 mm
deformed, stepped, or flattened, and that there are
no chips adhered or other problems, after flare
processing.
Gas side
Thickness
surface.
1.0 mm
B
R32/R410A Conventional
tool used
tool used
9.5
0 to 0.5 1.0 to 1.5
15.9
A
+0
A
–0.4
9 5 . 1 3 2 .
1 5 9 . 1 9 7 .
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ID
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