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6 Electrical installation
The backup heater capacity is depending on the chosen BUH option
kit. Make sure that the power supply is in accordance with the
backup heater capacity, as listed in the table below.
Backup
Backup
Power
heater type
heater
supply
capacity
*3V
1 kW
1N~ 230 V
2 kW
1N~ 230 V
3 kW
1N~ 230 V
*6V
2 kW
1N~ 230 V
4 kW
1N~ 230 V
6 kW
1N~ 230 V
*9W
3 kW
3N~ 400 V
6 kW
3N~ 400 V
9 kW
3N~ 400 V
(a)
Electrical equipment complying with EN/IEC 61000-3-12
(European/International Technical Standard setting the limits for
harmonic currents produced by equipment connected to public
low-voltage systems with input current >16 A and ≤75 A per
phase).
(b)
This equipment complies with EN/IEC 61000‑3‑11 (European/
International Technical Standard setting the limits for voltage
changes, voltage fluctuations and flicker in public low-voltage
supply systems for equipment with rated current ≤75 A) provided
that the system impedance Z
interface point between the user's supply and the public system. It
is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with
a system impedance Z
less than or equal to Z
sys
Connect the backup heater power supply as follows:
Installation manual
18
Maximum
Z
max
running
current
4.4 A
—
8.7 A
—
13.1 A
—
8.7 A
—
(a)(b)
17.4 A
0.22 Ω
(a)(b)
26.1 A
0.22 Ω
4 A
—
9 A
—
13 A
—
is less than or equal to Z
at the
sys
max
.
max
X6M
SWB2
*3V (3V: 1N~ 230 V)
*6V (6V: 1N~ 230 V)
*9W (3N~ 400 V)
Model (power
Connections to backup heater power
supply)
X6M
*3V (3V: 1N~ 230 V)
SWB2
F1B
20A
Q1DI
1N~, 50 Hz
230 V AC
X6M
SWB2
F1B
1
3
20A
I
I
2
4
Q1DI
1N~, 50 Hz
L
N
230 V AC
supply
1
3
I
I
2
4
L
N
ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH₂O
4P679468-1 – 2022.02
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