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6 Preparation
WARNING
▪ All wiring MUST be performed by an authorised
electrician and MUST comply with the applicable
legislation.
▪ Make electrical connections to the fixed wiring.
▪ All components procured on-site and all electrical
construction
MUST
legislation.
WARNING
The backup heater MUST have a dedicated power supply
and MUST be protected by the safety devices required by
the applicable legislation.
WARNING
ALWAYS use multicore cable for power supply cables.
6.5.2
About preferential kWh rate power supply
Electricity companies throughout the world work hard to provide
reliable electric service at competitive prices and are often
authorized to bill clients at benefit rates. E.g. time-of-use rates,
seasonal rates, Wärmepumpentarif in Germany and Austria, ...
This equipment allows for connection to such preferential kWh rate
power supply delivery systems.
Consult with the electricity company acting as provider at the site
where this equipment is to be installed to know whether it is
appropriate to connect the equipment in one of the preferential kWh
rate power supply delivery systems available, if any.
When the equipment is connected to such preferential kWh rate
power supply, the electricity company is allowed to:
▪ interrupt power supply to the equipment for certain periods of time;
▪ demand that the equipment only consumes a limited amount of
electricity during certain periods of time.
The indoor unit is designed to receive an input signal by which the
unit switches into forced off mode. At that moment, the outdoor unit
compressor will not operate.
Whether the power supply is interrupted or not, the wiring to the unit
is different.
Installer reference guide
28
comply
with
the
applicable
6.5.3
Overview of electrical connections except
external actuators
Normal power
Preferential kWh rate power supply
supply
Power supply is
NOT interrupted
a
0
0
58 0
1 5 0
3
1
2
During preferential
kWh rate power
supply activation,
power supply is NOT
interrupted. The
outdoor unit is turned
off by the control.
Remark: The
electricity company
must always allow the
power consumption
of the indoor unit.
a
Normal power supply
b
Preferential kWh rate power supply
1
Power supply for outdoor unit
2
Power supply and interconnection cable to indoor unit
3
Power supply for backup heater
4
Preferential kWh rate power supply (voltage free contact)
5
Normal kWh rate power supply (to power the indoor unit
PCB in the event of power supply interruption of the
preferential kWh rate power supply)
6.5.4
Overview of electrical connections for
external and internal actuators
The following illustration shows the required field wiring.
INFORMATION
The following illustration is an example and might NOT
match your system layout.
a
20
6
15
12
13
21
23
16
22
17
18
19
a
Indoor unit
Item
Description
Outdoor unit and indoor unit power supply
1
Power supply for
outdoor unit
ERLQ004~008CA + EHVH/X04+08S18+26CB
Power supply is
interrupted
b
a
b
0
0
0
58 0
0
58 0
0
0
1 5 0
1 5 0
58 0
1 5 0
5
3
4
1
3
1
4
2
2
During preferential
kWh rate power
supply activation,
power supply is
interrupted
immediately or after
some time by the
electricity company.
In this case, the
indoor unit must be
powered by a
separate normal
power supply.
M
Wires
Maximum
running
current
(a)
2+GND or
3+GND
Daikin Altherma – Low temperature split
4P384973-1D – 2018.07
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