Daikin ERLA03DAV3 - Setting up the Domestic Hot Water Tank; System Layout - Integrated DHW Tank; Selecting the Desired Temperature for the DHW Tank

6 | Application guidelines
Installer reference guide
38
ERLA03DAV3 + EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1B – 2021.10
6.4 Setting up the domestic hot water tank
6.4.1 System layout – Integrated DHW tank
A
a
b
A Domestic hot water
a Cold water IN
b Hot water OUT
6.4.2 Selecting the desired temperature for the DHW 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 DHW tank temperature at a higher temperature
(example: 53°C), which is then mixed with cold water (example: 15°C).
Selecting the desired temperature for the DHW tank consists of:
1 Determining the DHW consumption (equivalent hot water volume at 40°C).
2 Determining the desired temperature for the DHW tank.
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 for 2 persons per day is as follows:
▪ 1 showers
▪ 1 bath
▪ 2 sink volumes
Then the DHW consumption = (1×100l)+(1×150l)+(2×10l)=270l