Daikin Altherma 3 H MT W - Setting up the Domestic Hot Water Tank; System Layout - Standalone DHW Tank; Selecting the Volume and Desired Temperature for the DHW Tank

6 | Application guidelines
Installer reference guide
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EPRA08~12EAV3+W1 + ETBH/X12EF6V+9W
Daikin Altherma 3 H MT W
4P634885-1 – 2021.03
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T
a
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Outdoor temperature
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Minimum weather-dependent setpoint for auxiliary gas boiler
6.4 Setting up the domestic hot water tank
6.4.1 System layout – Standalone DHW tank
M
b
c
a
d
a DHW tank
b Cold water IN
c Hot water OUT
d Motorised 3‑way valve
6.4.2 Selecting the volume and 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 volume and desired temperature for the DHW tank consists of:
1 Determining the DHW consumption (equivalent hot water volume at 40°C).
2 Determining the volume and 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: