Daikin Altherma 3 R F, Installer'S Reference Manual

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8 | Piping installation
Installer reference guide
111
ERLA11~W1 + EBVH16SU23DJ
Daikin Altherma 3 R F
4P655196-1 – 2021.09
▪ 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" [
4
108]).
▪ Because 250 l is lower than 290 l, the expansion vessel is appropriate for the
installation.
8.6 Connecting water piping
8.6.1 About connecting the water piping
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.
8.6.2 Precautions when connecting the water piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
"2 General safety precautions" [
4
10]
▪
"8.5 Preparing water piping" [
4
104]
8.6.3 To connect the water piping
NOTICE
Do NOT use excessive force when connecting the piping. Deformation of the piping
can cause malfunctioning of the unit.
To facilitate service and maintenance, 2 shut-off valves and 1 overpressure bypass
valve are provided. Mount the shut-off valves on the space heating water inlet and
space heating water outlet. To ensure the minimum flow rate (and prevent
overpressure), install the overpressure bypass valve on the space heating water
outlet.
1 Install the shut-off valves on the space heating water pipes.
2 Screw the indoor unit nuts on the shut-off valve.