To Connect The Backup Heater Power Supply - Daikin EPRA18DAV3 Installer's Reference Manual

8.3.2 To connect the backup heater power supply

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1B – 2020.12
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. Thus, the system can have EITHER preferential
kWh rate power supply OR a safety thermostat.
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 heater
capacity
*6V
*9W
Power supply
1N~ 230 V (6V)
3~ 230 V (6T1)
3N~ 400 V
Power supply
(a)
2 kW 1N~ 230 V
(a)
4 kW 1N~ 230 V
(a)
6 kW 1N~ 230 V
(d)
2 kW 3~ 230 V
(d)
4 kW 3~ 230 V
(d)
6 kW 3~ 230 V
3 kW 3N~ 400 V
6 kW 3N~ 400 V
9 kW 3N~ 400 V
8 Electrical installation
|
Wires
2+GND
3+GND
4+GND
Maximum Z
running current
9 A —
(b)(c)
17 A 0.22 Ω
(b)(c)
26 A 0.22 Ω
5 A —
10 A —
15 A —
4 A —
9 A —
13 A —
Installer reference guide
max
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