Daikin Altherma EHY2KOMB28AA User Reference Manual page 12

4 Operation
▪ During the morning, you consume hot water and the DHW tank
temperature decreases.
▪ At 14:00 the DHW tank is programmed to heat up the water to a
preset value (example: Storage eco = 50°C). Hot water is
available again.
▪ During the afternoon and evening, you consume hot water again
and the DHW tank temperature decreases again.
▪ At 00:00 the next day, the cycle repeats.
In scheduled mode, you can do the following:
You can...
Read out the active or next scheduled desired
temperature.
Overrule the active or next scheduled desired
temperature.
Condition: is displayed on the DHW tank
temperature home page.
Activate the DHW tank booster mode.
Select a DHW tank temperature schedule.
Program a DHW tank temperature schedule.
Define preset values that are used by the
DHW tank temperature schedule.
(Only for field supplied domestic hot water
pump for secondary return)
Program a domestic hot water pump schedule
to determine when to turn ON and OFF the pump.
When turned ON, the pump runs and makes sure
hot water is instantly available at the tap. To save
energy, only turn ON the pump during periods of
the day when instant hot water is necessary.
See also:
▪ "Using the DHW tank temperature home page" on page 12
▪ "Using the DHW tank booster mode" on page 13
▪ "4.7 Preset values and schedules" on page 16
Scheduled + reheat mode
In scheduled + reheat mode ( ), the domestic hot water control is
the same as in scheduled mode. However, when the DHW tank
temperature drops below a preset value (=reheat tank temperature –
hysteresis value; example: 35°C), the DHW tank heats up until it
reaches the reheat set point (example: 45°C). This ensures that a
minimum amount of hot water is available at all times.
Example:
T t
1
2
60°C
50°C
45°C
35°C
15°C
00:00 07:00
T DHW tank temperature
t
t Time
60°C Storage comfort
50°C Storage eco
45°C Reheat
35°C Reheat tank temperature – hysteresis value
In scheduled + reheat mode, you can do the following:
You can...
Do the same things as in scheduled mode.
User reference guide
12
Location
DHW tank
temperature
home page
Menu structure
3 4
5
14:00 21:00 t
Location
—
You can...
Adjust the preset value (Reheat).
See also:
▪ "Scheduled mode" on page 11
▪ "4.7 Preset values and schedules" on page 16
Using the DHW tank temperature home page
NOTICE
Disinfection mode. Even if you turn OFF domestic hot
water operation via the DHW tank temperature home page
(Tank), disinfection mode will remain active.
Typical DHW tank temperature home pages
Depending on the user profile, the user interface gives you either a
basic or a detailed home page. The examples in the illustrations
below are in DHW tank mode = Scheduled.
User profile = Basic
Mon 15:20
Tank
60°C
Storage comfort
To read out and adjust the desired reheat temperature (in
scheduled and reheat mode)
1 Go to [7.4.3.3]: > User settings > Preset values > Tank
temperature > Reheat.
Result: You can read out the desired reheat temperature.
2 Press or to adjust.
To read out and overrule the active or next scheduled desired
temperature (in scheduled mode or scheduled + reheat mode)
1 Go to the DHW tank temperature home page (Tank).
60°C
T t
Result: is displayed.
T t
a
b
A1 A2 A1 A2 B1 B1
T DHW tank temperature
t
t Time
During period...
A1 The next scheduled action (a)
A2 The active action (a)
B1 The next scheduled action (b)
B2 The active action (b)
2 Press or to overrule. Note: If the desired temperature is
weather dependent, you cannot change it on the home page.
Usage example: You need more hot water than scheduled
If you are in the following situation:
▪ Current time = 10:30
▪ Next scheduled action of the DHW tank = Heat up to the preset
value (Eco; example: 55°C and sufficient for 2 persons) at 14:00
▪ This evening you need hot water for 3 persons
Location
Menu structure
User profile = Detailed
Mon 15:20
60°C
Tank
Storage comfort
Tue 00:00
B2 B2 A1 A1
t
You can read out...
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma hybrid monobloc
4P531181-1 – 2018.06