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Electrical installation
Installer reference guide
104
EPRA14~W1 + ETVH/9W(G)
Daikin Altherma 3 H HT F
4P587502-1 – 2019.07
8.3.2 To connect the backup heater power supply
Backup heater type
Power supply
Wires
*6V
1N~ 230 V (6V)
2+GND
3~ 230 V (6T1)
3+GND
*9W
3N~ 400 V
4+GND
[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 can vary, depending on the indoor unit model. 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
*6V
2 kW
1N~ 230 V
(a)
9 A
—
4 kW
1N~ 230 V
(a)
17 A
(b)(c)
0.22 Ω
6 kW
1N~ 230 V
(a)
26 A
(b)(c)
0.22 Ω
2 kW
3~ 230 V
(d)
5 A
—
4 kW
3~ 230 V
(d)
10 A
—
6 kW
3~ 230 V
(d)
15 A
—
*9W
3 kW
3N~ 400 V
4 A
—
6 kW
3N~ 400 V
9 A
—
9 kW
3N~ 400 V
13 A
—
(a)
6V
(b)
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).
(c)
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
.
(d)
6T1
Connect the backup heater power supply as follows:
