Daikin Altherma EHFH-D3V - To Connect the Backup Heater Power Supply

6 Electrical installation
Installation manual
12
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
A
109
S1S
NL
56
1N~, 50 Hz,
230 V AC, 6.3 A
1 2 3
a b c
B
A
B
5 6
1 2 3
X2M
X5M
9 10
X1A
X11YA
X11YB
X11Y
X1M
a b c
a Interconnection cable (=main power supply)
b Normal kWh rate power supply
c Preferential power supply contact
3 Fix the cables with cable ties to the cable tie mountings.
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.
6.3.2 To connect the backup heater power
supply
Backup heater
type
Power supply Wires
*3V 1N~ 230V 2+GND
—
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.
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
*3V 3kW 1N~230V 13A
(a)
0.34Ω
(a)
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
.
Connect the power supply of the backup heater as follows:
X6M
F1B
Q1DI
a
b
a Factory-mounted cable connected to the contactor of the
backup heater, inside the switch box (K1M)
b Field wiring (see table below)
Model (power
supply)
Connections to backup heater power
supply
*3V (1N~230V)
1N~, 50 Hz
230 V AC
SWB2
Q1DI
1
2
3
4
F1B
I I
L N
X6M
2
1
K1M
4
3
BRN BLU
F1B Overcurrent fuse (field supply). Recommended fuse:
2‑pole; 16A; curve 400V; tripping class C.
K1M Contactor (in the lower switch box)
Q1DI Earth leakage circuit breaker (field supply)
SWB Switch box
X6M Terminal (field supply)