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6 Electrical installation
1 2 3
a
A
B
a
A
B
X1M
1 2 3
X11YA
X1A
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
preferential kWh rate power supply OR a safety
thermostat.
6.3.2
To connect the backup heater power
supply
Backup heater
Power supply
type
*3V
1N~ 230 V
Installation manual
12
1N~, 50 Hz,
230 V AC, 6.3 A
S1S
L
N
6
5
9
10
b
c
b
c
5 6
X2M
X11YB
9 10
X11Y
X5M
system
can
have
EITHER
Wires
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
Backup
heater type
heater
supply
capacity
*3V
3 kW
1N~ 230 V
(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
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
less than or equal to Z
sys
Connect the power supply of the backup heater as follows:
a
X6M
F1B
b
Q1DI
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
Connections to backup heater power
supply)
*3V (1N~ 230 V)
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)
Power
Maximum
Z
max
running
current
(a)
13 A
0.34 Ω
is less than or equal to Z
at the
sys
max
.
max
supply
2
4
K1M
1
3
SWB2
X6M
1
3
F1B
I
I
2
4
Q1DI
1N~, 50 Hz
L
N
230 V AC
EHFH03S18D
Daikin Altherma 3 R F
4P596803-1D – 2022.08
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