EDUS39-600-F2_a
Installation
FXDQ-M
23
than a flare part. If oil adheres to resin parts., deteriora-
tion can occur.
• Refer to Table 2 if no tor
q
ue
w
rench is available.
Using a
w
rench to tighten flare nuts causes the tightening
tor
q
ue to suddenly gro
w
much tighter after a certain point.
From there, tighten the nut further by the appropriate angle
listed in Table 2.
(5) After the work is finished, ensure there is no
g
as leak.
(6) After checkin
g
for
g
as leaks, be sure to insulate the
pipe connections referrin
g
to Fi
g
.
8
.
• Insulate using the insulation for fitting (3) (4) included
w
ith the li
q
uid and gas pipes. Besides, make sure the
insulation for fitting (3) (4) on the li
q
uid and gas piping
has its seams facing up.
Tighten both edges
w
ith clamp (9).
• For the gas piping,
w
rap the middle sealing pad (6) over
the insulation for fitting (4) flare nut part.
CAUTION
Be sure to insulate any field piping all the
w
ay to the piping
connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
• When brazing the refrigerant piping, perform nitrogen
replacement first, or perform the brazing
w
hile feeding
nitrogen into the refrigerant piping, and then connect the
indoor unit using the flare connections.
(Refer to Fi
g
. 9)
CAUTION
• When brazing a pipe
w
hile feeding nitrogen inside the pipe,
make sure to set the nitrogen pressure to 29 psi or less
using the pressure reducing valve.
Not recommendable but in case of emer
g
ency
You must use a tor
q
ue
w
rench but if it is necessary to install
the unit
w
ithout a tor
q
ue
w
rench, you may follo
w
the installa-
tion method mentioned belo
w
.
After the work is finished, make sure to check that there is
no
g
as leak.
When you keep on tightening the flare nut
w
ith a spanner,
there is a point
w
here the tightening tor
q
ue suddenly
increases. From that position, further tighten the flare nut the
angle sho
w
n belo
w
:
Table 2
DANGER
• Use of oxygen could result in an explosion resulting in seri-
ous injury or death. Only use nitrogen gas.
• Refrigerant gas may produce toxic gas if it comes in contact
w
ith fire such as from a fan heater, stove or cooking device.
Exposure to this gas could cause severe injury or death.
NOTE
• Do not use flux
w
hen brazing refrigerant piping. Therefore,
use the phosphor copper brazing filler metal (BCuP)
w
hich
does not re
q
uire flux.
(Flux has an extremely negative effect on refrigerant piping
systems. For instance, if chlorine based flux is used, it
w
ill
cause pipe corrosion. Flux containing fluorine
w
ill damage
refrigerant oil.)
Gas pipe
Piping insulation
material (main unit)
Attach to base
Flare nut connection
Turn seams up
Mid. sealing pad (6) (accessory)
Insulation for fitting (4) (accessory)
Gas Piping Insulation Procedure
Li
q
uid Piping Insulation Procedure
(accessory)
Clamp (9)
Piping insulation material
(Field supply)
Clamp (9) (accessory)
Flare nut connection
Turn seams up
Piping insulation material
(Field supply)
Piping insulation material
(main unit)
Attach to base
Main unit
Fi
g
.
8
Li
q
uid pipe
Insulation for fitting (3) (accessory)
Wrap over the top of
the flare nut connection.
Main unit
Pipe size (in.)
Further tightening angle
Recommended arm
length of tool (in.)
φ
1/4
60 to 90 degrees
Approx. 5-7/8
φ
3/8
60 to 90 degrees
Approx. 7-7/8
φ
1/2
30 to 60 degrees
Approx. 9-13/16
φ
5/8
30 to 60 degrees
Approx. 11-13/16
Refrigerant piping
Part to be brazed
Taping
Pressure-reducing valve
hands
valve
N
itrogen
N
itrogen
Fi
g
. 9
Содержание FXDQ-M
Страница 1: ...EDUS 39 600 F2_a AMERICAS FXDQ M Slim Ceiling Mounted Duct Type...
Страница 6: ...EDUS39 600 F2_a Dimensions FXDQ M 5 3 Dimensions FXDQ07 09 12MVJU 3D051759...
Страница 7: ...Dimensions EDUS39 600 F2_a 6 FXDQ M FXDQ18MVJU 3D051760...
Страница 8: ...EDUS39 600 F2_a Dimensions FXDQ M 7 FXDQ24MVJU 3D051761...
Страница 10: ...EDUS39 600 F2_a Wiring Diagrams FXDQ M 9 5 Wiring Diagrams FXDQ07M 09M 12M 18M 24MVJU 3D050501A...
Страница 11: ...Electric Characteristics EDUS39 600 F2_a 10 FXDQ M 6 Electric Characteristics 4D051757...