Daikin FDMQ09RVJU Installation Manual page 9

• The refrigerant is pre-charged in the outdoor unit.
Tighten
Torque wrench
Spanner
Piping union
Apply oil
Do not apply refrigeration
oil to the outer surface.
Flare nut
Do not apply refrigeration oil to
the flare nut to avoid tightening
with excessive torque.
Fig. 10
CAUTION
Do not have oil adhere to the screw fixing part of resin
parts.
If oil adheres, it may weaken the strength of screwed part.
Do not tighten flare nuts too tight.
If a flare nut cracks, the refrigerant may leak.
Insulation of field piping must be carried out up to the
connection inside the casing.
If the piping is exposed to the atmosphere, it may cause
sweating, burn due to touching the piping, electric shock or a
fire due to the wiring touching the piping.
• After leak test, referring to Fig. 11, insulate both the gas and
liquid piping connection with the attached fitting insulation
(4) and (5) to prevent the pipings from getting exposed.
Then, tighten both the ends of insulating material with the clamp (8).
• Wrap the sealing pad (Medium) (7) around the fitting insulation
(4) and (5) (flare nut section), both the gas and liquid piping.
• Make sure to bring the seam of fitting insulation (4) and (5)
to the top.
English
Flare nut
Fig. 9
Apply refrigeration
oil only to the inner
surface of the flare.
Gas Piping Insulation Procedure
Fitting
insulation (5)
Flare nut Piping insulating
connection material (unit)
Bring the
Do not leave
seam
clearance.
to the top.
Unit
Clamp (8)
Piping
insulating
Tighten the portion
material
where overlapped by
(field supply)
the piping insulating
material.
Do not expose the
piping in order to
prevent the vapor
condensation.
Liquid Piping Insulation Procedure
Fitting
insulation (4)
Piping insulating
Flare nut
material (unit)
connection
Bring the
Do not leave
seam
clearance.
to the top.
Unit
Piping
Clamp (8)
insulating
material
Tighten the portion
(field supply)
where overlapped by
the piping insulating
Do not expose the
material.
piping in order to
prevent the vapor
condensation.
Fig. 11
NOTE
1. In case of refrigerant shortage due to forgetting additional
refrigerant charge etc., it will 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.
Wind around the
piping until top of the
flare nut connection,
beginning at the base.
Sealing pad
(Medium) (7)
Wind around the
piping, beginning
at the base.
Sealing pad
(Medium) (7)
8