Daikin Altherma 3 R F Installer's Reference Manual page 106

8 | Piping installation
Installer reference guide
106
a Individual room thermostat (option)
b Overpressure bypass valve (delivered as accessory)
c Shut-off valve (delivered as accessory)
M1...3 Individual motorised valve to control each loop (field supply)
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.
c
c
M1 M2
a a a
150 200 250
Water volume
≤200 l
Do the following:
▪
▪
b
M3
b
290
>200 l
Decrease the pre-pressure
according to the required
installation
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
volume.
ERLA11~16DAV3+W1 + EBVH/X11+16S18+23DJ
Daikin Altherma 3 R F
4P643602-1 – 2021.09
height
the
water