6 Electrical installation
Installation manual
19
ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH
₂
O
4P679468-1 – 2022.02
Model (power
supply)
Connections to backup heater power
supply
*6V (6V: 1N~ 230 V)
1N~, 50 Hz
230 V AC
SWB2
Q1DI
N
L
X6M
1
2
3
4
F1B
32A
I
I
*9W (3N~ 400 V)
3N~, 50 Hz
400 V AC
SWB2
Q1DI
L1 L2 L3 N
X6M
1
2
3
4
5
6
F1B
20A
I
I
I
F1B
Overcurrent fuse (field supply). Recommended fuse:
tripping class C.
Q1DI
Earth leakage circuit breaker (field supply)
SWB
Switch box
X6M
Terminal (field supply)
6.3.4
To connect the backup heater to the main
unit
Wires: The connection cables are already connected to the
option backup heater EKECBU*.
[9.3]
Backup heater
1
"4.2.1 To open the indoor unit"
1
User interface panel
1
3
4
2
2
Switch box
3
Switch box cover
4
Top cover
2
Connect both connection cables from the backup heater
EKECBU* to the appropriate connectors as shown in the
illustration below.
3
Fix the cable with cable ties to the cable tie mountings. General
information, see
"6.3.1 To connect the electrical wiring to the
15].
6.3.5
To connect the shut-off valve
INFORMATION
Shut-off valve usage example.
In case of one LWT zone,
and a combination of underfloor heating and heat pump
convectors, install a shut-off valve before the underfloor
heating to prevent condensation on the floor during cooling
operation.
Wires: 2×0.75 mm²
Maximum running current: 100 mA
230 V AC supplied by PCB
[2.D]
Shut off valve
1
"4.2.1 To open the indoor unit"
1
User interface panel
1
3
4
2
2
Switch box
3
Switch box cover
4
Top cover
2
Connect the valve control cable to the appropriate terminals as
shown in the illustration below.
NOTICE
Wiring is different for a NC (normally closed) valve and a
NO (normally open) valve.
