Daikin ERLA03DAV3 Installer's Reference Manual page 57

ERLA03DAV3 + EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1A – 2020.05
b Overpressure bypass valve (field supply). The installation of a field-supplied overpressure bypass valve is
recommended.
c Shut-off valve
Maximum water volume
Use the following graph to determine the maximum water volume for the
calculated pre-pressure.
a
2.4
2
1.5
1
0.5
0.3
20 50 100
a Pre-pressure (bar)
b Maximum water volume (l)
Example: Maximum water volume and expansion vessel pre-pressure
Installation
height
(a)
difference
≤7 m No pre-pressure adjustment is
required.
>7 m Do the following:
▪ Increase the pre-pressure
according to the required
installation
difference. The pre-pressure
should increase by 0.1 bar
for each metre above 7 m.
▪ Check if the water volume
does
maximum
volume.
(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.
150 200 250
Water volume
≤200 l
Do the following:
▪
▪
The expansion vessel of the
indoor unit is too small for the
installation. In this case, it is
recommended to install an
height
extra vessel outside the unit.
NOT exceed the
allowed water
7 Piping installation
|
b
290
>200 l
Decrease the pre-pressure
according to the required
installation height
difference. The pre-pressure
should decrease by 0.1 bar
for each metre below 7 m.
Check if the water volume
does NOT exceed
maximum allowed water
volume.
Installer reference guide
the
57