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Application guidelines
Installer reference guide
55
EPRA08~W1 + ETSH/X(B)12P30+50EF
Daikin Altherma 3 H MT ECH₂O
4P663478-1 – 2021.07
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.
▪
When the heat pump produces domestic hot water, it cannot heat up a space. In
case you need domestic hot water and space heating at the same, we
recommend to produce the domestic hot water during the night when there is
lower space heating demand.
6.4.3 Setup and configuration – storage tank
▪
For large DHW consumptions, you can heat up the storage tank several times
during the day.
▪
To heat up the storage tank to the desired storage tank temperature, you can
use the following energy sources:
-
Thermodynamic cycle of the heat pump
-
Electrical backup heater (optional)
-
Bivalent heat source, see
"6.3 Setting up bivalent heat sources"
▪
For more information about optimizing the energy consumption for producing
domestic hot water, see
141].
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