Daikin FXFSQ-AVM, Engineering Data

Page: 44 / 56

FXFSQ-AVM EDFMT391769A
42
3P468397-1D
• Before brazing refrigerant piping, have nitroge n flow
through the refrigerant piping and substitute air w ith
nitrogen (NOTE 2) (Refer to Fig. 13). Then, carry out
brazing (NOTE 3).
After all the brazing
w orks are carry out
connection w ith the indoor unit.
(Refer to Fig. 12)
Pressure reducing valve
Nitrogen
Taping
Stop valve
Brazing place
Nitrogen
Refrigerant piping
Fig. 13
NOT E
2. The
1. After indoor unit installation completed, in case will
perform the air tight test of field pipe and indoor unit,
for air tight test pressure, refer the installation manual
attached in outdoor unit.
proper pressure for having nitrogen through the
piping is approximately 0.02 MPa, a pressure that makes
one feel like breeze and can be obtained through a
pressure reducing valve.
3. Do not use
whe n brazing refrigerant piping.
Use phosphor copper brazing metal (BCuP-2: JIS Z
3264/B-Cu93P-710/795: ISO 3677) that does not require
(If chlorinated is used, the piping w ill be corroded and,
in addition if is contained, the refrig erant oil w ill
be deteriorated and the refrigerant circuit w ill be affected
badly.)
4. When carrying out leakage test of refrigerant piping and
the indoor unit after the installation of indoor unit is
fin ished , confirm the connecting outdoor unit installation
manual for test pressure.
Refer to also the outdoor unit installation manual or
technical document for refrigerant piping.
5. In case of refrigerant shortage due to forgetting additional
refrigerant charge etc., it w ill result in malfunc tion such as
does not cool or does not heat.
Refer to the outdoor unit installation manual or technical
document for refrigerant piping.
CAUTION
Do not use antioxidant when brazing piping.
It may result in malfunction of components and clogging of
piping due to residue.
9
Joint insulating
material (9)
(accessory)
Piping holding plate scre w
(2 points)
Gas piping
Liquid piping
Liquid side piping insulating method
Indoor unit
Indoor unit
Clamp (4)
(accessory)
Sealing material
(11) Medium-1
(accessory)
Sealing material
(12) Medium-2
(accessory)
Clamp (4)
(accessory)
Piping
insulating
material
(field supply)
Gas side piping insulating method
Joint insulating
material (8)
(accessory)
Piping insulating
material (main unit)
Bring the
seam
to the top.
Flare nut
connection
Piping
insulating
material
(field supply)
Do not leave
clearance.
Flare nut
connection
Bring the
seam
to the top.
Do not leave
clearance.
Piping insulating
material (main unit)
Wind around the
piping until top of the
flare nut connection,
beginning at the base.
Wind around the
piping, beginning
at the base.
Do not expose the
piping in order to
prevent the vapor
condensation.
Tighten the portion
where overlapped by
the piping insulating
material.
Tighten the portion
where overlapped by
the piping insulating
material.
Do not expose the
piping in order to
prevent the vapor
condensation.
Fig. 12