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Application guidelines
Installer reference guide
54
ERGA04~V3A+V37 + EHSH/X(B)04+08P30+50EF
Daikin Altherma 3 R ECH₂O
4P678716-1 – 2022.01
Configuration
Via the user interface (configuration wizard):
▪
Set the backup heater voltage
▪
Set the capacity steps, if applicable
6.4 Setting up the storage tank
6.4.1 System layout – Integrated storage tank
b
a
A
A
Domestic hot water
a
Cold water IN
b
Hot water OUT
6.4.2 Selecting the volume and desired temperature for the storage tank
People experience water as hot when its temperature is 40°C. Therefore, the DHW
consumption is always expressed as equivalent hot water volume at 40°C.
However, you can set the storage tank temperature at a higher temperature
(example: 53°C), which is then mixed with cold water (example: 15°C). The
resulting domestic hot water temperature depends on this setpoint as well as the
actual storage tank temperature.
Determining the DHW consumption
Answer the following questions and calculate the DHW consumption (equivalent
hot water volume at 40°C) using typical water volumes:
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
