6
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Application guidelines
Installer reference guide
48
EBLA09~16D + EDLA09~16D
Daikin Altherma 3 M
4P620241-1B – 2022.05
Setpoint of the auxiliary gas boiler
To prevent freeze-up of the water piping, the auxiliary gas boiler must have a fixed
setpoint ≥55°C, or a weather-dependent setpoint ≥T
min
.
0
–30
–25
–20
–15
–10
–5
0
5
20
30
40
50
60
10
T
a
(°C)
T
min
(°C)
T
a
Outdoor temperature
T
min
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
b
c
a
d
M
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:
