Daikin EPRA10EAV3, Installer'S Reference Manual

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6 | Application guidelines
Installer reference guide
55
EPRA08~W1 + ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663478-1B – 2022.07
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
Possible storage tank volumes
Type Equivalent hot water volume at 40°C
Integrated storage tank Approximate values of equivalent hot
water volume at 40°C for different
setpoints of the storage tank in average
climate
▪ 300
- 50°C: ~190 l of mixed water at 40°C
- 53°C: ~220 l of mixed water at 40°C
▪ 500
- 46°C: ~240 l of mixed water at 40°C
- 55°C: ~410 l of mixed water at 40°C
Energy saving tips
▪ If the DHW consumption differs from day to day, you can program a weekly
schedule with different desired storage tank temperatures for each day.
▪ The lower the desired storage tank temperature, the more cost effective. By
selecting a larger storage tank, you can lower the desired storage 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 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 55°C to avoid using the electrical resistance.
▪ The higher the outdoor temperature, the better the performance of the
heat pump.
- If energy prices are the same during the day and the night, we recommend to
heat up the storage tank during the day.
- If energy prices are lower during the night, we recommend to heat up the
storage tank during the night.