To Connect The Recirculation Piping; To Fill The Water Circuit; To Fill The Domestic Hot Water Tank; To Insulate The Water Piping - Daikin Altherma 3 R F Installation Manual

6 Electrical installation

NOTICE
It is recommended to install shut-off valves on the space
heating/cooling water in and out connections, as well as on
the domestic cold water in and domestic hot water out
connections. These shut-off valves are field supplied.
NOTICE
Overpressure bypass
recommend to install an overpressure bypass valve in the
space heating water circuit. Mind the minimum flow rate
when adjusting the overpressure bypass valve setting.
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 of LWT
zones = 1 LWT 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.
5.3.2

To connect the recirculation piping

Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see
unit" [ 4 6].
indoor
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.
5.3.3

To fill the water circuit

To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
Installation manual
10
valve (field supply). We
a
"4.2.1 To open the
INFORMATION
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
5.3.4

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.
5.3.5

To insulate the water piping

The piping in the complete water circuit MUST be insulated to
prevent condensation during cooling operation and reduction of the
heating and cooling 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.
6 Electrical installation
INFORMATION
This unit is a heating only model. Therefore, all references
to cooling in this document are NOT applicable.
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
CAUTION
Do NOT push or place redundant cable length in the unit.
NOTICE
The distance between the high voltage and low voltage
cables should be at least 50 mm.
WARNING
Make sure that the electrical wiring does NOT touch the
refrigerant gas pipe, which can be very hot.
a Refrigerant gas pipe
6.1

About electrical compliance

Only for the backup heater of the indoor unit
See "6.3.2 To connect the backup heater power
a
supply" [ 4 13].
EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596818-1D – 2021.10