Daikin EBSX-D - To Connect the Backup Heater Power Supply

6 Electrical installation
Installation manual
24
EBSH/X(B)11+16P50D
Daikin Altherma 3 R ECH₂O
4P759878-1 – 2024.01
a Interconnection cable
b Power supply indoor unit
c Preferential power supply contact
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
indoor unit"[422].
6.3.3 To connect the backup heater power
supply
Backup heater
type
Power supply Wires
EKECBU*3V 1N~ 230V (2+GND)×2.5mm²
(minimum)
EKECBU*6V 1N~ 230V (2+GND)×4mm²
(minimum); ONLY
flexible cords
EKECBU*9W 3N~ 400V (4+GND)×2.5mm²
(minimum)
[9.3] Backup heater
WARNING
The backup heater MUST have a dedicated power supply
and MUST be protected by the safety devices required by
the applicable legislation.
CAUTION
To guarantee the unit is completely earthed, ALWAYS
connect the backup heater power supply and the earth
cable.
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
heater type
Backup
heater
capacity
Power
supply
Maximum
running
current
Z
max
*3V 1kW 1N~230V 4.4A —
2kW 1N~230V 8.7A —
3kW 1N~230V 13.1A —
*6V 2kW 1N~230V 8.7A —
4kW 1N~230V 17.4A
(a)(b)
0.22Ω
6kW 1N~230V 26.1A
(a)(b)
0.22Ω
*9W 3kW 3N~400V 4A —
6kW 3N~400V 9A —
9kW 3N~400V 13A —
(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
sys
is less than or equal to Z
max
at the
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
sys
less than or equal to Z
max
.
Connect the backup heater power supply as follows: