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ERRA08~12E + ELVZ12S18+23E
Daikin Altherma 3 R MT F
4P708478-1 – 2023.05
Question
How much water is needed at the
kitchen sink per day?
Are there any other domestic hot water
needs?
Example: If the DHW consumption of a family (4 persons) per day is as follows:
▪
3 showers
▪
1 bath
▪
3 sink volumes
Then the DHW consumption = (3×100 l)+(1×150 l)+(3×10 l)=480 l
Determining the volume and desired temperature for the DHW tank
Formula
V
=V
+V
×(T
−40)/(40−T
1
2
2
2
V
=V
×(40−T
)/(T
−T
)
2
1
1
2
1
V
DHW consumption (equivalent hot water volume at 40°C)
1
V
Required DHW tank volume if only heated once
2
T
DHW tank temperature
2
T
Cold water temperature
1
Possible DHW tank volumes
Type
Integrated DHW tank
Energy saving tips
▪
If the DHW consumption differs from day to day, you can program a weekly
schedule with different desired DHW tank temperatures for each day.
▪
The lower the desired DHW tank temperature, the more cost effective. By
selecting a larger DHW tank, you can lower the desired DHW tank temperature.
▪
The heat pump itself can produce domestic hot water of maximum 62°C (59°C if
outdoor temperature is low). The electrical resistance of the option backup
heater (EKECBU*) can increase this temperature if it is installed and activated.
However, this consumes more energy. We recommend to set the desired storage
tank temperature below 62°C to avoid using the electrical resistance.
1 sink = 2 min×5 l/min = 10 l
—
)
If:
1
▪
▪
▪
Then V
If:
▪
▪
▪
Then V
▪
180 l
▪
230 l
6
Application guidelines
|
Typical water volume
Example
V
=180 l
2
T
=54°C
2
T
=15°C
1
=280 l
1
V
=480 l
1
T
=54°C
2
T
=15°C
1
=307 l
2
Possible volumes
Installer reference guide
39
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