Daikin EHVH04SU18CB6W — установка и подготовка системы низкотемпературного отопления [28/108]
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Daikin EHVH04SU18CB6W — установка и подготовка системы низкотемпературного отопления [28/108]

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Daikin EHVH04SU18CB6W [28/108] To check the water volume examples
6 Preparation
Installer reference guide
28
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Daikin Altherma – Low temperature split
4P449978-1 – 2016.06
INFORMATION
Domestic hot water tank kit (EKVSU180+260A). The
domestic hot water kit also contains 2 expansion vessels.
Check that they are pressurised by pushing their Schrader
valves (purging air).
6.4.5 To check the water volume: Examples
Example 1
The indoor unit is installed 5m below the highest point in the water
circuit. The total water volume in the water circuit is 100l.
No actions or adjustments are required.
Example 2
The indoor unit is installed at the highest point in the water circuit.
The total water volume in the water circuit is 350l.
Actions:
▪ Because the total water volume (350 l) is more than the default
water volume (280l), the pre-pressure must be decreased.
▪ 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 410 l.
(See the graph in the chapter above).
▪ Because 350 l is lower than 410 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 authorized
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
The booster 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
5
8
0
1
5
0
0
0
2
a
3
1
4
5
8
0
1
5
0
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
14
5
8
0
1
5
0
0
0
5
8
0
1
5
0
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.

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