Daikin FTXF20A2V1B - Connecting the Refrigerant Piping; Guidelines When Connecting the Refrigerant Piping; To Connect the Refrigerant Piping to the Indoor Unit; Connecting the Electrical Wiring

5 Installation
Installation manual
12
(A)(F)TXP20~71L2V1B + 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