6 Preparation
Installer reference guide
23
ERGA04~08DAV3(A) + 08S18+23DA
Daikin Altherma – Low temperature split
4P495249-1 – 2017.12
▪ The required pre-pressure is:
Pg = (0.3+(H/10)) bar = (0.3+(0/10)) bar=0.3 bar.
▪ The corresponding maximum water volume at 0.3 bar is 290 l.
(See the graph in the chapter above).
▪ Because 250 l is lower than 290 l, the expansion vessel is
appropriate for the installation.
6.5
Preparing electrical wiring
6.5.1
About preparing electrical wiring
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
WARNING
▪ If the power supply has a missing or wrong N-phase,
equipment might break down.
▪ Establish proper earthing. Do NOT earth the unit to a
utility pipe, surge absorber, or telephone earth.
Incomplete earthing may cause electrical shock.
▪ Install the required fuses or circuit breakers.
▪ Secure the electrical wiring with cable ties so that the
cables do NOT come in contact with sharp edges or
piping, particularly on the high-pressure side.
▪ Do NOT use taped wires, stranded conductor wires,
extension cords, or connections from a star system.
They can cause overheating, electrical shock or fire.
▪ Do NOT install a phase advancing capacitor, because
this unit is equipped with an inverter. A phase
advancing capacitor will reduce performance and may
cause accidents.
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 the site and all electrical
construction MUST comply with the applicable
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.
6.5.3
Overview of electrical connections except
external actuators
Normal power
supply
Preferential kWh rate power supply
Power supply is
NOT interrupted
Power supply is
interrupted
1
580
1 50
0
0
2
a
3
1
4
580
1 50
0
0
2
b
3
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.
5 3
a
b
1
4
580
1 50
0
0
580
1 50
0
0
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.
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
Item
Description
Wires
Maximum
running
current
Outdoor unit and indoor unit power supply
1
Power supply for
outdoor unit
2+GND
(a)
2
Power supply and
interconnection cable to
indoor unit
3
(f)
3
Power supply for
backup heater
See table below. —
4
Preferential kWh rate
power supply (voltage
free contact)
2
(d)
5
Normal kWh rate power
supply
2
6.3 A
