3 Preparation
Installation manual
6
EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618951-1 – 2020.03
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.
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
10 litres, the internal water volume of the indoor 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.
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.
Minimum required flow rate
12 l/min
See the recommended procedure as described in
3.3
Preparing electrical wiring
3.3.1
Overview of electrical connections for
external and internal actuators
Item
Description
Wires
Maximum
running
current
Outdoor unit and indoor unit power supply
1
Power supply for
outdoor unit
2+GND
(a)
2
Power supply and
interconnection cable to
indoor unit
3
(g)
3
Power supply for
backup heater
See table below. —
4
Preferential kWh rate
power supply (voltage
free contact)
2
(e)
5
Normal kWh rate power
supply
2
6.3 A
Optional equipment
6
3‑way valve
3
100 mA
(b)
Item
Description
Wires
Maximum
running
current
7
Power supply for
booster heater and
thermal protection
(from indoor unit)
4+GND
(c)
8
Power supply for
booster heater (to
indoor unit)
2+GND
13 A
9
Domestic hot water
tank thermistor
2
(d)
10
User interface used as
room thermostat
2
(f)
11
Room thermostat
3 or 4
100 mA
(b)
12
Outdoor ambient
temperature sensor
2
(b)
13
Indoor ambient
temperature sensor
2
(b)
14
Heat pump convector
2
100 mA
(b)
Field supplied components
15
Shut-off valve
2
100 mA
(b)
16
Electricity meter
2 (per meter)
(b)
17
Domestic hot water
pump
2
(b)
18
Alarm output
2
(b)
19
Changeover to external
heat source control
2
(b)
20
Space cool/heat
operation control
2
(b)
21
Power consumption
digital inputs
2 (per input
signal)
(b)
22
Safety thermostat
2
(e)
(a)
Refer to name plate on outdoor unit.
(b)
Minimum cable section 0.75 mm².
(c)
Cable section 2.5 mm².
(d)
The thermistor and connection wire (12 m) are delivered
with the domestic hot water tank.
(e)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
50 m. Voltage-free contact shall ensure the minimum
applicable load of 15 V DC, 10 mA.
(f)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m. Applicable for both single user interface and dual
user interface connection.
(g)
Cable section 1.5 mm².
NOTICE
More technical specifications of the different connections
are indicated on the inside of the indoor unit.
Backup heater
type
Power supply
Required number of
conductors
*6V
1N~ 230 V (6V)
2+GND
3~ 230 V (6T1)
3+GND
*9W
3N~ 400 V
4+GND