Refrigerant Piping Work - Daikin FTXN15KVJU Installation Manual

Preparation before Installation
3.
How to set the different addresses
When two indoor units are installed in one room,
the two wireless remote controllers can be set
for different addresses.
1) Remove the metal plate electrical wiring
cover.
(Refer to the When connecting to an HA
system.)
2) Cut the address jumper (JA) on the printed
circuit board.
3) Cut the address jumper (J4) in the remote
controller.
4.
When connecting to an HA system
(wired remote controller, central remote controller etc.)
1) Remove the front grille. (3 screws)
2) Remove the electrical wiring box. (1 screw)
3) Remove the metal plate electrical wiring cover. (4 tabs)
4) Attach the connection cord to the S21 connector and pull the harness out through the notched part in the figure.
5) Replace the electrical wiring cover as it was, and pull the harness around, as shown in the figure.
* Some models cannot be connected to an HA system.
3) Remove the metal
plate electrical
wiring cover.

Refrigerant Piping Work

1.
Flaring the pipe end
1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward
so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.
WARNING
• Do not use mineral oil on flared part.
• Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
• Never install a drier to this R410A unit in order to guarantee its lifetime.
• The drying material may dissolve and damage the system.
• Incomplete flaring may cause refrigerant gas leakage.
6
Push
Tab
Push
Slide
Main body
Screw
Push
Tab
JA
Address
EXIST 1
CUT 2
HA connector
(S21)
Metal plate
electrical cover
4)
Attach the connection cord to
the S21 connector and pull the
harness out through the
notched part in the figure.
(Cut exactly at
right angles.) Remove burrs.
Set exactly at the position shown below.
A Flare tool for R410A
A 0-0.020 inch (0-0.5mm)
Die
J4 ADDRESS
EXIST 1
CUT 2
HA cord
Tab
Notched part
5) Replace the electrical
wiring cover as it was,
and pull the harness
around, as shown
in the figure.
Check
Flare's inner surface
must be flaw-free.
Flaring
Conventional flare tool
Clutch-type Clutch-type (Rigid-type)
0.039-0.059 inch (1.0-1.5mm)
J4
The pipe end must
be evenly flared in a
perfect circle.
Make sure that the
flare nut is fitted.
Wing-nut type (Imperial-type)
0.059-0.079 inch (1.5-2.0mm)
■English