Daikin EKHWET-BV3, Installer'S Reference Manual, Page: 43 / 120

8 | Piping installation
Installer reference guide
43
E120B
R32 Split series – Domestic hot water tank
4P680077-1A – 2022.11
a b
a DHW – hot water OUT (screw connection, ½”)
b DHW – cold water IN (screw connection, ½”)
2 Install the following components (field supply) on the cold water inlet of the
DHW tank:
h
d
b a
e c
*f
*g
c
a DHW – hot water OUT (screw connection, ½”)
b DHW – cold water IN (screw connection, ½”)
c Shut-off valve (recommended)
d Non-return valve (recommended)
e Pressure reducing valve (recommended)
*f Pressure relief valve (max. 7 bar (=0.7 MPa))(mandatory)
*g Tundish (mandatory)
h Expansion vessel (recommended)
WARNING
Do NOT install any valves between the domestic hot water tank and the pressure
relief valve.
NOTICE
A pressure relief valve (field supply) with an opening pressure of maximum 7 bar
(=0.7 MPa) must be installed on the domestic cold water inlet connection in
accordance with the applicable legislation.
NOTICE
To avoid damage to the surroundings in case of water leakage, it is recommended to
close the domestic cold water inlet shut‑off valves during periods of absence.
8.4.4 To connect the recirculation piping
If recirculation is required in your system, the water return to the tank must be
from the cold water inlet.
A check valve must be installed to prevent water return to the supply system
8.4.5 To fill the domestic hot water tank
1 Open every hot water tap in turn to purge air from the system pipe work.
2 Open the cold water supply valve.