4 Preparation
Installation manual
6
(A)(F)TXP20~3 FTXF20~3 FTXF20~25B5V1B
Daikin room air conditioner
3P519299-1H – 2019.09
(a)
A safety device might stop the operation of the system.
(b)
Condensation might occur on the indoor unit and drip.
4
Preparation
4.1
Preparing the installation site
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
4.1.1
Installation site requirements of the
indoor unit
INFORMATION
The sound pressure level is less than 70 dBA.
▪
Air flow.
Make sure nothing blocks the air flow.
▪
Drainage.
Make sure condensation water can be evacuated
properly.
▪
Wall insulation
. When conditions in the wall exceed 30°C and a
relative humidity of 80%, or when fresh air is inducted into the
wall, then additional insulation is required (minimum 10 mm
thickness, polyethylene foam).
▪
Wall strength.
Check whether the wall or the floor is strong
enough to support the weight of the unit. If there is a risk, reinforce
the wall or the floor before installing the unit.
▪
Spacing.
Install the unit at least 1.8 m from the floor and keep the
following requirements in mind for distances from the walls and
the ceiling:
≥50
≥50
≥30
(mm)
4.2
Preparing refrigerant piping
4.2.1
Refrigerant piping requirements
NOTICE
The piping and other pressure-containing parts shall be
suitable for refrigerant. Use phosphoric acid deoxidised
seamless copper for refrigerant.
▪ Foreign materials inside pipes (including oils for fabrication) must
be ≤30 mg/10 m.
Refrigerant piping diameter
Use the same diameters as the connections on the outdoor units:
Class
L1 liquid piping
L1 gas piping
20~35
Ø6.4
Ø9.5
Refrigerant piping material
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Flare connections:
Only use annealed material.
▪
Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade
Thickness (t)
(a)
6.4 mm (1/4")
Annealed (O)
≥0.8 mm
t
Ø
(a)
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
4.2.2
Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 120°C
▪ Insulation thickness
Pipe outer diameter
(Ø
p
)
Insulation inner
diameter (Ø
i
)
Insulation thickness
(t)
6.4 mm (1/4")
8~10 mm
≥10 mm
Ø
i
Ø
i
t
Ø
p
Ø
p
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
5
Installation
5.1
Opening the units
5.1.1
To open the indoor unit
To remove the front panel
1
Hold the front panel by the panel tabs on both sides and open
it.
a
a
Panel tabs
2
Remove the front panel by sliding it to the left or the right and
pulling it toward you.
Result:
The front panel shaft on 1 side will be disconnected.
3
Disconnect the front panel shaft on the other side in the same
manner.
a
