To Connect The Main Power Supply; To Connect The Backup Heater Power Supply - Daikin Altherma EHVH08SU18CB6W Installer's Reference Manual

7 Installation
7.9.7

To connect the main power supply

1 Connect the main power supply.
In case of normal kWh rate power supply
X5M
X6YB
X2M
30 31
X6Y
X6YA
X1M
a
1 2 3
1 2 3
Legend: see illustration below.
In case of preferential kWh rate power supply
Connect X6Y to X6YB.
X5M
X6Y
3 4
X6YB
X2M
30 31
X6YA
X1M
c b a
L N 1 2 3
S1S L N 1 2 3
a Interconnection cable (=main power supply)
b Normal kWh rate power supply
c Preferential power supply contact
2 Fix the cables with cable ties to the cable tie mountings.
INFORMATION
In case of preferential kWh rate power supply, connect
X6Y to X6YB. The necessity of separate normal kWh rate
power supply to indoor unit (b) X2M/30+31 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/3+4) as the safety
thermostat. It is only possible for the system to have
EITHER preferential kWh rate power supply OR a safety
thermostat.
Installer reference guide
44
X1A X19A
X1A X19A
7.9.8 To connect the backup heater power
supply
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 Backup
heater type heater supply
capacity
*6W 3 kW 1~ 230 V
6 kW 1~ 230 V
6 kW 3~ 230 V
6 kW 3N~ 400 V
(a) Equipment complying with EN/IEC 61000-3-12 (European/
International Technical Standard setting the limits for
harmonic currents produced by equipment connected to
public low-voltage systems with input current >16 A and
≤75 A per phase.).
(b) 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
less than or equal to Z
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
Z .
max
1 Connect the backup heater power supply. For *6W models, a
4‑pole fuse is used for F1B.
2 If required, modify the connections on terminals X6M and X7M.
Backup heater Connections to
type backup heater power
supply
F1B
3 kW 1~ 230 V
(*6W)
L L N N
6 kW 1~ 230 V
(*6W)
F1B
6 kW 3~ 230 V
(*6W)
L1 L2 L3 L1 L2 L3
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Power Maximum Z (Ω)
max
running
current
13 A —
(a)(b)
26 A —
15 A —
8.6 A —
sys
at the interface point between the
max
less than or equal to
sys
Connections to
terminals
X6M X7M
1 2 3 4 5 6 7 8
X6M X7M
1 2 3 4 5 6 7 8
X6M X7M
1 2 3 4 5 6 7 8
Daikin Altherma – Low temperature split
4P449978-1B – 2018.07
is