6 Electrical installation
Installation manual
17
EL23E
Daikin Altherma 3 R MT F
4P708476-1 – 2023.03
NOTICE
Differential
pressure bypass valve
(delivered as
accessory). We recommend to install the differential
pressure bypass valve in the space heating water circuit.
▪ Mind the minimum water volume when choosing the
installation location of the differential pressure bypass
valve (at the indoor unit, or at the collector). See
"5.3.1 To check the water volume and flow rate"
15].
▪ Mind the minimum flow rate when adjusting the
differential pressure bypass valve setting. See
"5.3.1 To check the water volume and flow rate"
and
"8.2.1 To check the minimum flow rate"
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
a
Bypass
Configuration.
Set field setting [7-02]=0 (
Number of
zones
=
Single zone
).
NOTICE
Install air purge valves at all local high points.
5.4.2
To connect the recirculation piping
Prerequisite:
Only required if you need recirculation in your system.
1
Remove the top panel from the unit, see
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.
5.4.3
To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
NOTICE
Pump.
To prevent blocking of the pump rotor, commission
the unit as quickly as possible after filling the water circuit.
INFORMATION
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
5.4.4
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.
5.4.5
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
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
national wiring regulation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction MUST comply with the applicable
legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
WARNING
If the supply cord is damaged, it MUST be replaced by the
manufacturer, its service agent or similarly qualified
persons in order to avoid a hazard.
CAUTION
Do NOT push or place redundant cable length into the unit.
