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Piping installation
Installer reference guide
114
ERRA08~12E + ELVH/23E
Daikin Altherma 3 R MT F
4P708474-1 – 2023.05
M2
a
b
a
a
c
c
M3
M1
a
Individual room thermostat (option)
b
Differential pressure 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.
0.3
0.5
1
1.5
2
2.4
50
20
100
150
200
250
290
a
b
a
Pre-pressure (bar)
b
Maximum water volume (l)
Example: Maximum water volume and expansion vessel pre-pressure
Installation
height
difference
(a)
Water volume
≤200 l
>200 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.
