Drain Piping Work - Daikin FXAQ15AUV1B Installation Manual

• Nitrogen should be set to 0.02 MPa with a pressure-reducing valve if brazing while inserting nitrogen into
the piping. (Refer to Fig.14)
Refrigerant piping
CAUTION
Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping
may cause condensation or burns if touched.
• After checking for gas leaks, be sure to insulate the pipe connections using the supplementary piping
insulation tubing and insulating tape (4). The insulating tape (4) should be wrapped from the L-shaped bend
all the way to the end inside the unit. (Refer to Fig. 15)
Local piping
Indoor unit piping insulation tubing
CAUTION
Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping
may cause condensation or burns if touched.

6. DRAIN PIPING WORK

(1) Install the drain piping. (Refer to Fig. 16)
• The drain pipe should be short with a downward slope and should prevent air pockets from forming.
• Watch out for the points in the Fig. 16 when performing drain work.
Make sure the drain
hose is at a downward
slope.
12
Part to be
brazed
Nitrogen
Insulating tubing tape
Insulating tape (accessory) (4)
Indoor unit piping
See "4.INDOOR UNIT
INSTALLATION"
Make sure the tip does
not go underwater even
when water is added.
Taping
hands valve
Clamping material large
(accessory) (5)
Insulating tubing tape
L-shaped
bend
Drain hose
(Downward
slope)
Fig. 16
Pressure-reducing valve
Nitrogen
Indoor unit piping insulation tubing
Insulating tubing tape
Insulation tubing seam
Attach the insulation tubing
tape so that there are no gaps
in the insulation tubing seam.
Start wrapping
Fig. 14
Fig. 15
Drain hose
English