To Connect The Backup Heater Power Supply - Daikin ETBH16E9W Installer's Reference Manual

9 | Electrical installation

9.3.2 To connect the backup heater power supply

Installer reference guide
120
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
*9W
[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
If the indoor unit has a tank with a built‑in electrical booster heater, use a dedicated
power circuit for the backup heater and booster heater. NEVER use a power circuit
shared by another appliance. This power circuit MUST be protected with the
required safety devices according to 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
*9W
Power supply
1N~ 230 V (6V3)
3~ 230 V (6T1)
3N~ 400 V
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
3 kW 3N~ 400 V
6 kW 3N~ 400 V
9 kW 3N~ 400 V
Wires
2+GND
3+GND
4+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
4 A
9 A
13 A
EPRA14~18D + ETBH/X16E
Daikin Altherma 3 H HT W
4P644736-1D – 2023.10
Z
max
—
0.22 Ω
0.22 Ω
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