4
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Operation
User reference guide
34
ETVH/9W(G) + ETBH/9W
Daikin Altherma 3 H HT F+W
4P586456-1B – 2020.10
If… is displayed
Then the DHW tank mode =…
Only [5.1]
Powerful
operation
Reheat only
All items except [5.4]
Reheat
setpoint
are displayed
Schedule only
All items including [5.4]
Reheat setpoint
are
displayed
Sc reheat
4.7.2 Reheat mode
In reheat mode the DHW tank continuously heats up to the temperature shown on
the home screen (example: 50°C) when the temperature drops below a certain
value.
t
60°C
00:00
07:00
50°C
15°C
40°C
14:00
21:00
1
2
3
4
Tt
T
t
DHW tank temperature
t
Time
INFORMATION
Risk of space heating capacity shortage for domestic hot water tank without internal
booster heater: In case of frequent domestic hot water operation, frequent and long
space heating/cooling interruption will happen when selecting the following:
Tank
>
Heat up mode
>
Reheat only
.
INFORMATION
When the DHW tank mode is reheat, the risk for capacity shortage and comfort
problem is significant. In case of frequent reheat operation, space heating/cooling
function is regularly interrupted.
4.7.3 Scheduled mode
In scheduled mode the DHW tank produces hot water corresponding to a schedule.
The best time to allow the tank to produce hot water is at night, because the space
heating demand is lower.
Example:
t
60°C
00:00
07:00
50°C
15°C
40°C
14:00
21:00
1
2
3
4
5
Tt
T
t
DHW tank temperature
