6
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Preparation
Installer reference guide
47
C08AF + EHYKOMB33A
Daikin Altherma R Hybrid
4P471761-1E – 2020.10
6.4.5 To check the water volume: Examples
Example 1
The indoor unit is installed 5 m below the highest point in the water circuit. The
total water volume in the water circuit is 100 l.
No actions or adjustments are required for either underfloor heating loops or
radiators.
Example 2
The indoor unit is installed at the highest point in the water circuit. The total water
volume in the water circuit is 350 l. Radiators are installed, so use the graph of
80°C.
Actions:
▪
Because the total water volume (350 l) is more than the default water volume
(140 l), the pre-pressure must be decreased.
▪
The required pre-pressure is:
Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar = 0.3 bar
▪
The corresponding maximum water volume at 0.3 bar is 205 l. (See the graph in
the chapter above).
▪
Because 350 l is more than 205 l, the expansion vessel is too small for the
installation. Therefore install an extra vessel outside the installation.
6.5 Preparing electrical wiring
6.5.1 About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
6].
WARNING
▪
If the power supply has a missing or wrong N-phase, equipment might break
down.
▪
Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber,
or telephone earth. Incomplete earthing may cause electrical shock.
▪
Install the required fuses or circuit breakers.
▪
Secure the electrical wiring with cable ties so that the cables do NOT come in
contact with sharp edges or piping, particularly on the high-pressure side.
▪
Do NOT use taped wires, stranded conductor wires, extension cords, or
connections from a star system. They can cause overheating, electrical shock or
fire.
▪
Do NOT install a phase advancing capacitor, because this unit is equipped with an
inverter. A phase advancing capacitor will reduce performance and may cause
accidents.
