4 Installation
Installation manual
5
08SU EHVH08~16SU26CB6W
Daikin Altherma – Low temperature split
4P449980-1B – 2016.11
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 or
3+GND
(a)
2
Power supply and
interconnection cable to
indoor unit
3
(c)
3
Power supply for
backup heater
See table below. —
3a
Power supply for
booster heater
2+GND
(c)
4
Preferential kWh rate
power supply (voltage
free contact)
2
(d)
5
Normal kWh rate power
supply
2
6.3 A
User interface
6
User interface
2
(e)
Optional equipment
11
Power supply for
bottom plate heater
2
(b)
12
Room thermostat
3 or 4
100 mA
(b)
13
Outdoor ambient
temperature sensor
2
(b)
15
Heat pump convector
4
100 mA
(b)
Field supplied components
16
Shut-off valve
2
100 mA
(b)
17
Electricity meter
2 (per meter)
(b)
18
Domestic hot water
pump
2
(b)
19
Alarm output
2
(b)
20
Changeover to external
heat source control
2
(b)
21
Space heating
operation control
2
(b)
22
Power consumption
digital inputs
2 (per input
signal)
(b)
23
Safety thermostat
2
(d)
(a)
Refer to name plate on outdoor unit.
(b)
Minimum cable section 0.75 mm².
(c)
Cable section 2.5 mm².
(d)
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.
(e)
Cable section 0.75 mm² till 1.25 mm²; maximum length:
500 m. Applicable for both single user interface and dual
user interface connection.
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
*6W
1× 230 V
2+GND + 2 bridges
3× 230 V
3+GND + 1 bridge
3× 400 V
4+GND
4
Installation
4.1
Opening the units
4.1.1
To open the indoor unit
1
Loosen and remove the screws at the bottom of the unit.
2
Push on the button at the bottom of the front plate.
WARNING: Sharp edges
Take the front plate on the upper part instead of the lower
part. Watch your fingers, there are sharp edges on the
lower part of the front plate.
3
Slide the front panel of the unit downwards and remove it.
CAUTION
The front panel is heavy. Be careful NOT to jam your
fingers when opening or closing the unit.
4
Loosen and remove the 4 screws that fix the top panel.
5
Remove the top panel from the unit.
2
3
4
5
1
2
4×
2×
4.1.2
To open the switch box cover of the
indoor unit
4×
