Daikin EPRA08EAV3, Installer'S Reference Manual

Page: 87 / 292

8 | Piping installation
Installer reference guide
87
EPRA08~W1 + ETVH/9W
Daikin Altherma 3 H MT F
4P634886-1 – 2021.03
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" [
4
84]).
▪ Because 250 l is lower than 290 l, the expansion vessel is appropriate for the
installation.
8.2 Connecting water piping
8.2.1 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 outdoor unit.
2 Connecting the water piping to the indoor unit.
3 Connecting the recirculation piping.
4 Connecting the drain hose to the drain.
5 Filling the water circuit.
6 Filling the domestic hot water tank.
7 Insulating the water piping.
8.2.2 Precautions when connecting the water piping
INFORMATION
Also read the precautions and requirements in the following chapters:
▪
"2 General safety precautions" [
4
10]
▪
"8.1 Preparing water piping" [
4
81]
8.2.3 To connect the water piping
NOTICE
Do NOT use excessive force when connecting the field piping and make sure the
piping is aligned properly. Deformation of the piping can cause malfunctioning of the
unit.
Outdoor unit
1 Connect the shut-off valve (with integrated filter) to the outdoor unit water
inlet, using thread sealant.