English
10
•
After leak test, referring to
Fig. 22
, insulate both the gas
and liquid piping connection with the attached joint insu-
lating material (6) and (7) to prevent the piping from get-
ting exposed.
Then, tighten the both ends of insulating material with the
clamp (4).
•
Wrap the sealing material (Small) (9) around the joint
insulating material (6) (7).
•
Make sure to bring the seam of joint insulating material (6)
and (7) to the top.
•
When carrying out upward and rightward piping, use the
attached L-shaped piping, and insulate the 2 places of
connection.
(Refer to Fig. 23)
In addition, bend the liquid side field piping using a bender
with radius is 40 mm or less.
If the attached L-shaped piping is not used or the piping is
bent with a bender with radius more than 40 mm, it may
interfere with other piping or drain hose.
(To prevent small animals and insects getting into the
indoor unit, make sure to tightly fit the piping penetrating
cover to the casing and seal the clearance between the
piping and the hole with putty and insulating material (field
supply).)
•
Before brazing refrigerant piping, have nitrogen flow
through the refrigerant piping and substitute air with nitro-
gen (NOTE 1).
(Refer to Fig. 24)
Then, carry out brazing
(NOTE 2).
After all the brazing works are finished, carry out flare con-
nection with the indoor unit.
(Refer to Fig. 21)
Fig. 22
Liquid piping
Piping insulating
material
(field supply)
Gas piping
Joint insulating material (7) (accessory)
Piping insulating material (unit side)
Liquid side piping insulating method
Do not leave clearance
Clamp (4) (accessory)
Sealing material
(Small) (9)
(accessory)
Flare nut connection
Bring the seam to
the top
Wrap the sealing
material from the root
of the unit to the part
of flare nut connection
For prevention of
sweating, do not
expose the piping
Tighten the section where
the piping insulating
material and the joint
insulating material (7)
overlap.
Clamp (4) (accessory)
Tighten the section where
the piping insulating
material and the joint
insulating material (6)
overlap.
Piping insulating
material
(field supply)
Joint insulating material (6) (accessory)
Piping insulating material (unit side)
Gas side piping insulating method
Do not leave clearance
Sealing material
(Small) (9)
(accessory)
Flare nut connection
Bring the seam to
the top
Wrap the sealing
material from the root
of the unit to the part
of flare nut connection
For prevention of
sweating, do not
expose the piping
Fig. 23
For upward and rightward piping
L-shaped piping insulating method
Piping insulating material
(field supply)
Joint insulating material (6)
(accessory)
Clamp (4) (accessory)
Flare nut
connection
L-shaped
piping (13)
Insulate the piping in the same manner as
shown in
Fig. 22
using the attached joint
insulating material (6).
To prevent sweating, do not
expose the piping to the
atmosphere.
Tighten the section where the piping insulating material and the
joint insulating material (6) overlap.
(e.g. Insulate the piping in the same manner for
upward and rightward piping.)
Pressure reducing valve
Nitrogen
Taping
Stop valve
Brazing
place
Nitrogen
Refrigerant piping
Fig. 24
01_EN_3P177351-7S.fm Page 10 Thursday, March 21, 2013 10:19 PM
