5 Installation
Installation manual
12
(A)(F)TXP20~7 FTXF20~71A2V1B
Daikin room air conditioner
3P512025-1C – 2018.01
NOTICE
Do NOT apply lubricating oil (refrigerant oil) to the drain
plug when inserting it. The drain plug may deteriorate and
cause drain leakage from the plug.
a
a
4 mm hexagonal wrench
3
Insert the drain hose on the left side and do not forget to tighten
it with the fixing screw; otherwise water leakage may occur.
a
b
a
b
a
Insulation fixing screw
b
Drain hose
4
Attach the drain hose to the refrigerant pipes bottom side using
adhesive vinyl tape.
A
B
C
b
a
A
Left-side piping
B
Left-back piping
C
Left-bottom piping
a
Remove the pipe port cover here for left-side piping.
b
Remove the pipe port cover here for left-bottom piping.
To check for water leaks
1
Remove the air filters.
2
Gradually pour approximately 1 l of water in the drain pan, and
check for water leaks.
5.3
Connecting the refrigerant piping
DANGER: RISK OF BURNING
5.3.1
Guidelines when connecting the
refrigerant piping
Take the following guidelines into account when connecting pipes:
▪ Coat the flare inner surface with ether oil or ester oil when
connecting a flare nut. Tighten 3 or 4 turns by hand, before
tightening firmly.
▪ ALWAYS use 2 wrenches together when loosening a flare nut.
▪ ALWAYS use a spanner and torque wrench together to tighten the
flare nut when connecting the piping. This to prevent nut cracking
and leaks.
a
b
c
d
a
Torque wrench
b
Spanner
c
Piping union
d
Flare nut
Piping size
(mm)
Tightening
torque (N•m)
Flare
dimensions (A)
(mm)
Flare shape
(mm)
Ø6.4
15~17
8.7~9.1
R=0.4~0.8
45° ±2
90°±2
A
Ø9.5
33~39
12.8~13.2
Ø12.7
50~60
16.2~16.6
5.3.2
To connect the refrigerant piping to the
indoor unit
▪
Pipe length
. Keep refrigerant piping as short as possible.
▪
Flare connections
. Connect refrigerant piping to the unit using
flare connections.
▪
Insulation
. Insulate the refrigerant piping, interconnection cable
and drain hose on the indoor unit as follows:
c
a
b
f
d
g
e
a
Gas pipe
b
Gas pipe insulation
c
Interconnection cable
d
Liquid pipe
e
Liquid pipe insulation
f
Finishing tape
g
Drain hose
NOTICE
Make sure to insulate all refrigerant piping. Any exposed
piping might cause condensation.
5.4
Connecting the electrical wiring
DANGER: RISK OF ELECTROCUTION
