To Connect The Backup Heater Power Supply - Daikin EPRA18DAW1 Installer's Reference Manual

8 | Electrical installation

8.3.2 To connect the backup heater power supply

Installer reference guide
94
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.
INFORMATION
The preferential kWh rate power supply contact is connected to the same terminals
(X5M/9+10) as the safety thermostat for the additional zone. It is only possible for
the system to have EITHER preferential kWh rate power supply OR a safety
thermostat for the additional zone.
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
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 (6V)
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
EPRA14~18DAV3+W1 + ETVZ16S18+23DA6V+9W
Daikin Altherma 3 H HT F
4P587503-1A – 2020.01
Z
max
—
0.22 Ω
0.22 Ω
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