To Connect The Backup Heater Power Supply - Daikin Altherma 3 R F Installer's Reference Manual

9 | Electrical installation

9.3.2 To connect the backup heater power supply

Installer reference guide
116
INFORMATION
In case of preferential kWh rate power supply, connect X11Y to X11YB. The necessity
of separate normal kWh rate power supply to indoor unit (b) X2M/5+6 depends on
the type of preferential kWh rate power supply.
Separate connection to the indoor unit is required:
▪
if preferential kWh rate power supply is interrupted when active, OR
▪
if no power consumption of the indoor unit is allowed at the preferential kWh
rate power supply when active.
Backup heater type
*6V
[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 Backup
type
capacity
*6V
(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
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
equal to Z .
max
(d)
6T1
Power supply
1N~ 230 V (6V)
3~ 230 V (6T1)
Power supply
heater
2 kW 1N~ 230 V
4 kW 1N~ 230 V
6 kW 1N~ 230 V
2 kW 3~ 230 V
4 kW 3~ 230 V
6 kW 3~ 230 V
is less than or equal to Z
sys max
Wires
2+GND
3+GND
Maximum
running current
(a)
9 A
(a) (b)(c)
17 A
(a) (b)(c)
26 A
(d)
5 A
(d)
10 A
(d)
15 A
at the interface point between the user's
ERGA04~08EAV3(A) + EHVH04+08SU18+23EA6V
4P629090-1 – 2020.08
Z
max
—
0.22 Ω
0.22 Ω
—
—
—
less than or
sys
Daikin Altherma 3 R F