To Connect The Recirculation Piping; To Fill The Water Circuit; To Fill The Domestic Hot Water Tank; To Insulate The Water Piping - Daikin ERGA08DAV3 Installer's Reference Manual

NOTICE
If you install this unit 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 Bypass
Configuration. Set field setting [7-02]=0 (Number
zones = Single zone).
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 (= 1 MPa) 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.
7.8.4

To connect the recirculation piping

Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see
indoor unit" on page 25.
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.
ERGA04~08DAV3(A) + EHVZ04+08S18+23DA +
EHVZ04+08S18+23DJ
Daikin Altherma 3 R F
4P495249-1B – 2019.06
a
of
"7.2.3 To open the
4 Reattach the top panel.
7.8.5

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.
7.8.6

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.
3 Close all water taps after all air is purged.
4 Check for water leaks.
5 Manually operate the field-installed pressure relief valve to
ensure a free water flow through the discharge pipe.
7.8.7

To insulate the water piping

The piping in the complete water circuit MUST be insulated to
prevent condensation during defrost operation and reduction of the
heating capacity.
If the temperature is higher than 30°C and the humidity is higher
than RH 80%, the thickness of the insulation materials should be at
least 20 mm to prevent condensation on the surface of the
insulation.
7.9

Connecting the electrical wiring

7.9.1

About connecting the electrical wiring

Before connecting the electrical wiring
Make sure:
▪ The refrigerant piping is connected and checked
▪ The water piping is connected
7 Installation
Installer reference guide
37