Daikin Altherma 3 H HT F, Руководство по установке для специалистов, Страница: 89 / 300

8 | Piping installation
Installer reference guide
89
EPRA14~18D + ETV23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03
M2
a
b
a a
c
c
c
c
M3 M1
c
a Individual room thermostat (optional)
b Overpressure bypass valve (delivered as accessory)
c Shut-off valve
Maximum water volume
NOTICE
The maximum water volume depends on whether glycol is added to the water
circuit. For more information on the addition of glycol, refer to
"8.2.7 To protect the
water circuit against freezing" [
4
98].
Use the following graph to determine the maximum water volume for the
calculated pre-pressure.
20
2,4
2,1
1,8
1,5
1,2
0,9
1
0,6
0,3
70 120
175 140 200 255
220 270
A
B
A Pre-pressure (bar)
B Maximum water volume (l)
Water
Water + glycol
Example: Maximum water volume and expansion vessel pre-pressure
Installation
height
difference
(a)
Water volume
≤190 l >190 l
≤7 m No pre-pressure adjustment is
required. Do the following:
▪ 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 the
maximum allowed water
volume.