Daikin Altherma EHYHBH08AA - Tank

4 Operation
User reference guide
12
EHYHBH05AA + EHYHBH/X05+08AA + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355632-1A – 2016.02
To adjust the instant DHW temperature
1 Go to the instant DHW home page.
2 Press
or to adjust the instant DHW temperature (DHW).
The instant DHW set point temperature may NOT be below 40°C.
4.5.3 Tank
The following modes are only applicable if a tank is installed and are
set by the installer.
To determine which DHWtank mode you are using (method1)
Check the installer settings table filled in by the installer.
To determine which DHWtank mode you are using (method 2)
Prerequisite: User profile = Detailed.
1 Go to the DHWtank temperature home page (Tank).
2 Check which icons are displayed:
If… is displayed Then the DHWtank mode =…
Reheat mode
Scheduled mode

Scheduled + reheat mode
Reheat mode
In reheat mode (
),the DHW tank continuously heats up to the
temperature shown on the DHW tank temperature home page
(example: 50°C).
t
60°C
00:00 07:00
50°C
15°C
40°C
14:00 21:00
1
2
3
4
T
t
T
t
DHWtank temperature
t Time
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.
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
T
t
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: Storage comfort = 60°C).
▪ 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.
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
t
60°C
00:00 07:00
50°C
45°C
15°C
14:00 21:00
35°C
1
2
4
5
3
T
t
DHWtank temperature
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… Location
Do the same things as in scheduled mode. —
Adjust the preset value (Reheat). Menu structure
See also:
▪ "Scheduled mode"on page12
▪ "4.7Preset values and schedules"on page16
Using the DHWtank temperature home page
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 User profile = Detailed
15:20
60°C
Storage comfort
Tank
Mon
15:20
60°C
00:00
Mon
Tue
Tank
Storage comfort