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6
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Application guidelines
Installer reference guide
52
Question
How many showers are needed per
day?
How many baths are needed per day?
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
Standalone 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.
1 shower = 10 min×10 l/min = 100 l
1 bath = 150 l
1 sink = 2 min×5 l/min = 10 l
—
)
1
▪
150 l
▪
180 l
▪
200 l
▪
250 l
▪
300
compatible with solar kit)
▪
500 l (compatible with solar kit)
Typical water volume
Example
If:
▪
V
=180 l
2
▪
T
=54°C
2
▪
T
=15°C
1
Then V
=280 l
1
If:
▪
V
=480 l
1
▪
T
=54°C
2
▪
T
=15°C
1
Then V
=307 l
2
Possible volumes
l
(polypropylene
EPRA14~18D + ETBH/X16E
Daikin Altherma 3 H HT W
4P644736-1D – 2023.10
tank
is
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