Preparing Water Piping; To Check The Water Volume And Flow Rate; Third-Party Tank Requirements; Preparing Electrical Wiring - Daikin Altherma 3 H W Installationsanleitung

3.2

Preparing water piping

NOTICE
In case of plastic pipes, make sure they are fully oxygen
diffusion tight according to DIN 4726. The diffusion of
oxygen into the piping can lead to excessive corrosion.
▪ Valve towards expansion vessel. The valve towards the
expansion vessel (if equipped) MUST be open.
NOTICE
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive
corrosion of the water piping.
3.2.1

To check the water volume and flow rate

Minimum water volume
Check that the total water volume in the installation is minimum 20
litres, the internal water volume of the outdoor unit NOT included.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed.
Minimum flow rate
Check that the minimum flow rate in the installation is guaranteed in
all conditions. This minimum flow rate is required during defrost/
backup heater operation. For this purpose, use the overpressure
bypass valve delivered with the unit, and respect the minimum water
volume.
Minimum required flow rate
20 l/min
NOTICE
To guarantee proper operation it is recommended to have
a minimum flow of 28 l/min during DHW.
NOTICE
If glycol was added to the water circuit, and the
temperature of the water circuit is low, the flow rate will
NOT be displayed on the user interface. In this case, the
minimum flow rate can be checked by way of the pump
test (check that the user interface does NOT display error
7H).
NOTICE
When circulation in each or certain space heating loops is
controlled by remotely controlled valves, it is important that
the minimum flow rate is guaranteed, even if all valves are
closed. In case the minimum flow rate cannot be reached,
a flow error 7H will be generated (no heating or operation).
See the installer reference guide for more information.
See the recommended procedure as described in
during commissioning" [ 4 22].
3.2.2

Third-party tank requirements

In case of a third-party tank, the tank shall adhere to the following
requirements:
▪ The heat exchanger coil of the tank is ≥1.05 m².
▪ The tank thermistor must be located above the heat exchanger
coil.
▪ The booster heater must be located above the heat exchanger
coil.
EABH/X16DF6V+9W
Daikin Altherma 3 H W
4P644479-1 – 2020.12
NOTICE
Performance. Performance data for third-party tanks
CANNOT be provided, and performance CANNOT be
guaranteed.
NOTICE
Configuration. Configuration of a third-party tank depends
on the size of the heat exchanger coil of the tank. For more
information, see the installer reference guide.
3.3
3.3.1
Item
Outdoor unit and indoor unit power supply
1
2
3
4
5
Optional equipment
6
7
8
9
10
11
12
13
14
Field supplied components
15
"6.2 Checklist
16
17
18
19
20
21

Preparing electrical wiring

Overview of electrical connections for
external and internal actuators
Description Wires
Power supply for 2+GND
outdoor unit
Power supply and 3
interconnection cable to
indoor unit
Power supply for See table below. —
backup heater
Preferential kWh rate 2
power supply (voltage
free contact)
Normal kWh rate power 2
supply
3‑way valve 3
Power supply for 4+GND
booster heater and
thermal protection
(from indoor unit)
Power supply for 2+GND
booster heater (to
indoor unit)
Domestic hot water 2
tank thermistor
User interface used as 2
room thermostat
Room thermostat 3 or 4
Outdoor ambient 2
temperature sensor
Indoor ambient 2
temperature sensor
Heat pump convector 2
Shut-off valve 2
Electricity meter 2 (per meter)
Domestic hot water 2
pump
Alarm output 2
Changeover to external 2
heat source control
Space cool/heat 2
operation control
Power consumption 2 (per input
digital inputs signal)
3 Preparation
Maximum
running
current
(a)
(g)
(e)
6.3 A
(b)
100 mA
(c)
13 A
(d)
(f)
(b)
100 mA
(b)
(b)
(b)
100 mA
(b)
100 mA
(b)
(b)
(b)
(b)
(b)
(b)
Installation manual
5