Daikin FFA25A2VEB Installation And Operation Manual page 7

▪ Checking for water leaks
General guidelines
▪ Pipe length. Keep drain piping as short as possible.
▪ Pipe size. Keep the pipe size equal to or greater than that of the
connecting pipe (vinyl pipe of 25 mm nominal diameter and
32 mm outer diameter).
▪ Slope. Make sure the drain piping slopes down (at least 1/100) to
prevent air from being trapped in the piping. Use hanging bars as
shown.
1~1.5 m
a Hanging bar
O Allowed
X Not allowed
▪ Condensation. Take measures against condensation. Insulate
the complete drain piping in the building.
▪ Rising piping. If necessary to make the slope possible, you can
install rising piping.
▪ Drain hose inclination: 0~75 mm to avoid stress on the piping
and to avoid air bubbles.
▪ Rising piping: ≤300 mm from the unit, ≤630~675 mm
(depending on the decoration panel used) perpendicular to the
unit.
a b
≤300
a b
A ≤645 mm: In case of installation with BYFQ60B
≤630 mm: In case of installation with BYFQ60C
B 205 mm: In case of installation with BYFQ60B
220 mm: In case of installation with BYFQ60C
a Metal clamp (accessory)
b Drain hose (accessory)
c Rising drain piping (vinyl pipe of 25 mm nominal diameter
and 32 mm outer diameter) (field supply)
d Hanging bars (field supply)
▪ Combining drain pipes. You can combine drain pipes. Make
sure to use drain pipes and T-joints with the correct gauge for the
operating capacity of the units.
A ≤645 mm: In case of installation with BYFQ60B
≤630 mm: In case of installation with BYFQ60C
a T-joint
FFA25~60A2VEB
Split system air conditioners
4P456960-1 – 2017.03
a
1000~1500
c d d
(mm)
a
(mm)
To connect the drain piping to the indoor unit
NOTICE
Incorrect connection of the drain hose might cause leaks,
and damage the installation space and surroundings.
1 Push the drain hose as far as possible over the drain pipe
connection.
2 Tighten the metal clamp until the screw head is less than 4 mm
from the metal clamp part.
3 Check for water leaks (see
page 7).
4 Install the insulation piece (drain pipe).
5 Wind the large sealing pad (= insulation) around the metal
clamp and drain hose, and fix it with cable ties.
6 Connect the drain piping to the drain hose.
1 2~6
a b e
4
1
A-A'
a Drain pipe connection (attached to the unit)
b Drain hose (accessory)
c Metal clamp (accessory)
d Large sealing pad (accessory)
e Insulation piece (drain pipe) (accessory)
f Drain piping (field supply)
To check for water leaks
The procedure differs depending on whether electrical wiring is
already finished. When electrical wiring is not finished yet, you need
to temporarily connect the user interface and power supply to the
unit.
When electrical wiring is not finished yet
1 Temporarily connect electrical wiring.
▪ Remove the control box cover (a).
▪ Connect the single-phase power supply (50 Hz, 230 V) to
connections No. 1 and No. 2 on the terminal block for power
supply (d) and earth (c).
▪ Reattach the control box cover (a).
5 Installation
"To check for water leaks" on
c d f
2 5 6
A A
A' A'
≤4 mm
d
c
3
b
a
Installation and operation manual
7