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12
English
CAUTION
For local insulation, be sure to insulate local piping all the way into the pipe connections inside the
machine.
Exposed piping may cause condensation or burns on contact.
CAUTION
• CAUTION TO BE TAKEN WHEN BRAZING REFRIGERANT PIPING
Do not use flux when brazing refrigerant piping. Therefore, use the phosphor copper brazing filler metal
(BCuP-2: JIS Z 3264/B-Cu93P-710/795: ISO 3677) which does not require flux.
(Flux has extremely harmful influence on refrigerant piping systems. For instance, if the chlorine based flux
is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will damage the refrigerant
oil.)
•
Before brazing local refrigerant piping, nitrogen gas shall be blown through the piping to expel air from the
piping.
If you brazing is done without nitrogen gas blowing, a large amount of oxide film develops inside the piping,
and could cause system malfunction.
•
When brazing the refrigerant piping, only begin brazing after having carried out nitrogen substitution or
while inserting nitrogen into the refrigerant piping. Once this is done, connect the indoor unit with a flared
or a flanged connection.
Pipe holding
plate scre
w
(2 points)
Gas piping
Li
qu
id piping
Proced
u
re for thermal ins
u
lation of li
qu
id-side piping
Ins
u
lating material for
joints (9)(accessory)
Flare n
u
t connection
Piping ins
u
lation
material (main
u
nit)
Main
u
nit
Main
u
nit
Clamp (4)
(accessory)
Sealing pad
(11) Medi
u
m-1
(accessory)
Sealing pad
(12) Medi
u
m-2
(accessory)
Clamp (4)
(accessory)
Piping ins
u
lation
material
(Field s
u
pply)
Proced
u
re for thermal ins
u
lation of gas-side piping
Ins
u
lating material for
joints (
8
) (accessory)
Piping ins
u
lation
material (main
u
nit)
T
u
rn seams
u
p.
Flare n
u
t connection
Piping ins
u
lation
material
(Field s
u
pply)
T
u
rn seams
u
p.
Do not ha
v
e the
clearance.
Do not ha
v
e the
clearance.
W
ind aro
u
nd the
pipe
u
ntil top of the
flare n
u
t connection,
b
eginning at the
b
ase.
W
ind aro
u
nd the
pipe,
b
eginning at
the
b
ase.
Do not expose the
pipe in order to
pre
v
ent the
v
apor
condensation.
Do not expose the
pipe in order to
pre
v
ent the
v
apor
condensation.
Tighten the portion
w
here o
v
erlapped
b
y the piping
ins
u
lation material.
Tighten the portion
w
here o
v
erlapped
b
y the piping
ins
u
lation material.
Fig. 17
Summary of Contents for SkyAir GQI-Eco FCQG100EVEB
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