Daikin Altherma EAVZ16S18DA6V, Installer'S Reference Manual

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6 | Application guidelines
Installer reference guide
34
EPGA11~16DAV3(7) + EA23DA6V(7)+9W
Daikin Altherma 3 H F
4P556075-1A – 2021.09
Question Typical water volume
How many showers are needed per
day? 1 shower = 10 min×10 l/min = 100 l
How many baths are needed per day? 1 bath = 150 l
How much water is needed at the
kitchen sink per day? 1 sink = 2 min×5 l/min = 10 l
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 Example
V
1
=V
2
+V
2
×(T
2
−40)/(40−T
1
) If:
▪ V
2
=180 l
▪ T
2
=54°C
▪ T
1
=15°C
Then V
1
=280 l
V
2
=V
1
×(40−T
1
)/(T
2
−T
1
) If:
▪ V
1
=480 l
▪ T
2
=54°C
▪ T
1
=15°C
Then V
2
=307 l
V
1
DHW consumption (equivalent hot water volume at 40°C)
V
2
Required DHW tank volume if only heated once
T
2
DHW tank temperature
T
1
Cold water temperature
Possible DHW tank volumes
Type Possible volumes
Integrated DHW tank ▪ 180 l
▪ 230 l
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 55°C (50°C if
outdoor temperature is low). The electrical resistance integrated in the
heat pump can increase this temperature. However, this consumes more energy.
We recommend to set the desired DHW tank temperature below 55°C to avoid
using the backup heater.