Daikin Altherma EAVX-D9WG, Руководство по установке для специалистов, Страница: 32 / 104

7 Installation
Installer reference guide
32
EPGA11~ EAVH/9W
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
7 Connect the space heating/cooling field piping of both zones to
the shut-off valves.
8 Connect the domestic hot water in and out pipes to the indoor
unit.
c d a b e f
a Space heating/cooling water out
b Space heating/cooling water in
c Domestic hot water out
d Domestic cold water in (cold water supply)
e Outdoor unit water connection out
f Outdoor unit water connection in
NOTICE
It is recommended to install shut-off valves to domestic
cold water in and domestic hot water out connections.
These shut-off valves are field supplied.
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.
NOTICE
Overpressure bypass valve (delivered as accessory). We
recommend to install the overpressure bypass valve in the
space heating water circuit.
▪ Mind the minimum water volume when choosing the
installation location of the overpressure bypass valve
(at the indoor unit, or at the collector). See
"6.3.3 To
check the water volume and flow rate" on page 24 .
▪ Mind the minimum flow rate when adjusting the
overpressure bypass valve setting. See "6.3.3 To
check the water volume and flow rate" on page 24 and
"9.4.1 To check the minimum flow rate" on page 70 .
NOTICE
Install air purge valves at all local high points.
NOTICE
A pressure relief valve (field supply) with an opening
pressure of maximum 10 bar must be installed on the
domestic cold water inlet connection in accordance with
the applicable legislation.
NOTICE
▪ A drain device and pressure relief device must be
installed on the cold water inlet connection of the
domestic hot water cylinder.
▪ To avoid back siphonage, it is recommended to install a
non-return valve on the water inlet of the domestic hot
water tank in accordance with the applicable legislation.
▪ It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
▪ An expansion vessel should be installed on the cold
water inlet in accordance with the applicable legislation.
▪ It is recommended to install the pressure relief valve on
a higher position than the top of the domestic hot water
tank. Heating of the domestic hot water tank causes
water to expand and without pressure relief valve the
water pressure inside the tank can rise above the tank
design pressure. Also the field installation (piping,
tapping points, etc.) connected to the tank is subjected
to this high pressure. To prevent this, a pressure relief
valve needs to be installed. The overpressure
prevention depends on the correct operation of the field
installed pressure relief valve. If this is NOT working
correctly, overpressure will deform the tank and water
leakage may occur. To confirm good operation, regular
maintenance is required.
7.5.4 To connect the recirculation piping
Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see "7.2.3 To open the
indoor unit" on page 27 .
2 Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.
3 Route the recirculation piping through the grommet and connect
it to the recirculation connector.
4 Reattach the top panel.
7.5.5 To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
INFORMATION
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
7.5.6 To protect the water circuit against
freezing
About freeze protection
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions, that include the activation of pump in case of low
temperatures: