To Check The Water Volume: Examples; Connecting Water Piping; About Connecting The Water Piping - Daikin ERRA08-12EW1 Installer's Reference Manual

8 | Piping installation

8.5.5 To check the water volume: Examples

8.6 Connecting water piping

8.6.1 About connecting the water piping

Installer reference guide
116
a Schrader valve
Example 1
The indoor unit is installed 5 m below the highest point in the water circuit. The
total water volume in the water circuit is 100 l.
No actions or adjustments are required.
Example 2
The indoor unit is installed at the highest point in the water circuit. The total water
volume in the water circuit is 250 l.
Actions:
▪ Because the total water volume (250 l) is more than the default water volume
(200 l), the pre-pressure must be decreased.
▪ The required pre-pressure is:
Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar = 0.3 bar
▪ The corresponding maximum water volume at 0.3 bar is 290 l. (See the graph in
"Maximum water volume" [
▪ Because 250 l is lower than 290 l, the expansion vessel is appropriate for the
installation.
Before connecting the water piping
Make sure the outdoor and indoor unit are mounted.
Typical workflow
Connecting the water piping typically consists of the following stages:
1 Connecting the water piping to the indoor unit.
2 Connecting the recirculation piping.
3 Connecting the drain hose to the drain.
4 Filling the water circuit.
5 Filling the domestic hot water tank.
6 Insulating the water piping.
4
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ERRA08~12E + ELVH/X12S18+23E
Daikin Altherma 3 R MT F
4P708474-1 – 2023.05