Daikin EHYHBX08AFV3 [49/252] Preparation
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Daikin EHYHBX08AFV3 [49/252] Preparation

Daikin EHYHBX08AFV3 [49/252] Preparation
6 | Preparation
Installer reference guide
49
EVLQ05+08CAV3 + EHYHBH05AF + EHYHBH/X08AF + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1F – 2020.10
f Pump
g Shut‑off valve (field supply)
h Collector
i Bypass valve (field supply)
RAD1…3 Radiator (field supply)
Maximum water volume
Use the following graph to determine the maximum water volume for the
calculated pre-pressure.
50
0.3
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
100 150 200 250 300 350 400 4500
a
b
a Pre-pressure (bar)
b Maximum water volume (l)
Maximum leaving water temperature of 55°C for underfloor heating applications
Maximum leaving water temperature of 80°C for radiator applications
Example in case of an underfloor heating application: Maximum water volume
and expansion vessel pre-pressure in case of 55°C
Installation
height
difference
(a)
Water volume
≤280l >280l
≤7m No pre-pressure adjustment is
required.
Do the following:
▪ Decrease the pre-pressure.
▪ Check if the water volume
does NOT exceed the
maximum allowed water
volume.
>7m Do the following:
▪ Increase the pre-pressure.
▪ Check if the water volume
does NOT exceed the
maximum allowed water
volume.
The expansion vessel of the
indoor unit is too small for the
installation. In this case, it is
recommended to install an
extra vessel outside the unit.
(a) This is the height difference (m) between the highest point of the water circuit and
the indoor unit. If the indoor unit is at the highest point of the installation, the
installation height is 0m.
Example in case of a radiator application: Maximum water volume and
expansion vessel pre-pressure in case of 80°C

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