4
|
Operation
User reference guide
36
ETVH/9W(G) + ETBH/9W
Daikin Altherma 3 H HT F+W
4P586456-1 – 2019.07
If… is displayed
Then the DHW tank mode =…
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
t
Time
▪
Initially, the DHW tank temperature is the same as the temperature of the
domestic water entering the DHW tank (example:
15°C
).
▪
At 00:00 the DHW tank is programmed to heat up the water to a preset value
(example:
Comfort
= 60°C
).
