7 Installation
Installer reference guide
35
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
NOTICE
If you install EHVZ models as a single-zone application,
then:
Setup.
Install a bypass between the space heating water
inlet and outlet of the additional zone (=direct zone). Do
NOT interrupt the water flow by closing the shut-off valves.
a
a
Bypass
Configuration.
Set field setting [7-02]=0 (Number of zones
= Single zone).
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
relieve 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.
7.8.4
To connect the recirculation piping
Prerequisite:
Only required if you need recirculation in your system.
1
Remove the top panel from the unit, see
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.
7.8.5
To connect the drain hose to the drain
Water coming from the pressure relief valve is collected in the drain
pan. The drain pan is connected to a drain hose inside the unit. You
must connect the drain hose to an appropriate drain according to the
applicable legislation. You can route the drain hose through the left
or right side panel.
Prerequisite:
The user interface panel and front panel have been
removed.
1
Remove one of the side panels.
2
Cut out the rubber grommet.
3
Pull the drain hose through the hole.
4
Reattach the side panel. Ensure the water can flow through the
drain tube.
It is recommended to use a tundish to collect the water.
Option 1: Through the left side panel
1
3×
T25
3
2
