To Connect The Drain Hose To The Drain; Piping Installation 15; Preparing Refrigerant Piping; Refrigerant Piping Requirements - Daikin Altherma 3 R W Installation Manual

▪ Remove the upper front panel, and open the switch box. See
"4.2.1 To open the indoor
▪ Remove the EPP block.
▪ Fix the unit to the wall with an Ø8 mm screw.
▪ Reattach the EPP block.
4.3.2

To connect the drain hose to the drain

Water coming from the pressure relief valve is collected in the drain
pan. You must connect the drain pan to an appropriate drain
according to the applicable legislation.
1 Connect a drain tube (field supply) to the drain pan connector
as follows:
a
a Drain pan connector
It is recommended to use a tundish to collect the water.
5 Piping installation
5.1

Preparing refrigerant piping

5.1.1

Refrigerant piping requirements

Also see "4.1.2 Special requirements for R32
additional requirements.
▪ Piping length: See "4.1.1 Installation site requirements of the
unit" [ 4 6].
indoor
▪ Piping material: Phosphoric acid deoxidised seamless copper.
▪ Piping connections: Only flare and brazed connections are
allowed. The indoor and outdoor units have flare connections.
Connect both ends without brazing. If brazing should be needed,
take the guidelines in the installer reference guide into account.
▪ Flare connections: Only use annealed material.
▪ Piping diameter:
EBBH/X11+16DF
Daikin Altherma 3 R W
4P643600-1B – 2021.10
unit" [ 4 13].
2
2
1
3
units" [ 4 7] for
Liquid piping
Gas piping
▪ Piping temper grade and thickness:
Outer diameter Temper grade
(Ø)
9.5 mm (3/8") Annealed (O)
15.9 mm (5/8") Annealed (O)
(a)
Depending on the applicable legislation and the maximum
working pressure of the unit (see "PS High" on the unit name
plate), larger piping thickness might be required.
5.1.2

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 Insulation inner
(Ø ) diameter (Ø
p
9.5 mm (3/8") 12~15 mm
15.9 mm (5/8") 17~20 mm
Ø Ø
i i
Ø Ø
p p
t
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.
5.2

Connecting refrigerant piping

See the installation manual of the outdoor unit for all guidelines,
specifications and installation instructions.
5.2.1 To connect the refrigerant piping to the
indoor unit
1 Connect the liquid stop valve from the outdoor unit to the
refrigerant liquid connection of the indoor unit.
a
b
a Refrigerant liquid connection
b Refrigerant gas connection
2 Connect the gas stop valve from the outdoor unit to the
refrigerant gas connection of the indoor unit.
5 Piping installation
Ø9.5 mm (3/8")
Ø15.9 mm (5/8")
(a)
Thickness (t)
Ø
≥0.8 mm
t
≥1.0 mm
Insulation thickness
) (t)
i
≥13 mm
≥13 mm
Installation manual
15