Daikin Altherma EAVX-D9WG Installer's Reference Manual page 58

8 Configuration
Heat pump ON hysteresis
Applicable when domestic hot water preparation is reheat only.
When the tank temperature drops below the reheat temperature
minus the heat pump ON hysteresis temperature, the tank heats up
to the reheat temperature.
The minimum ON temperature is 20°C, even if setpoint hysteresis is
smaller than 20°C.
# Code
[5.9] [6-00] Heat pump ON hysteresis
▪ 2°C~40°C
Reheat hysteresis
Applicable when domestic hot water preparation is scheduled
+reheat. When the tank temperature drops below the reheat
temperature minus the reheat hysteresis temperature, the tank heats
up to the reheat temperature.
# Code
[5.A] [6-08] Reheat hysteresis
▪ 2°C~20°C
Setpoint mode
# Code
[5.B] N/A Setpoint mode:
▪ Fixed
▪ Weather dependent
WD curve
When weather dependent operation is active the desired tank
temperature is determined automatically depending on the averaged
outdoor temperature: low outdoor temperatures will result in higher
desired tank temperatures as the cold water tap is colder and vice
versa.
In case of Schedule only or Schedule + reheat domestic hot water
preparation, the storage comfort temperature is weather dependent
(according to the weather dependent curve), the storage economic
and reheat temperature are NOT weather dependent.
In case of Reheat only domestic hot water preparation, the desired
tank temperature is weather dependent (according to the weather
dependent curve). During weather dependent operation, the end-
user cannot adjust the desired tank temperature on the user
interface. Also see "8.3.7 Detailed screen with weather-dependent
curve" on page 43.
Installer reference guide
58
Description
Description
Description
# Code
[5.C] [0-0E] Weather-dependent curve
T
[0-0D]
[0-0C]
[0-0C]
[0-0B]
[0-0B]
▪ T
DHW
▪ T : The (averaged) outdoor ambient
a
temperature
▪ [0-0E]:
temperature: -40°C‑5°C
▪ [0-0D]:
temperature: 10°C‑25°C
▪ [0-0C]: desired tank temperature when
the outdoor temperature equals or
drops
temperature: 45°C~[6‑0E]°C
▪ [0-0B]: desired tank temperature when
the outdoor temperature equals or
rises
temperature: 35°C~[6‑0E]°C
Margin
In domestic hot water operation, the following hysteresis value can
be set for the heat pump operation:
# Code
[5.D] [6-01] The temperature difference determining
the heat pump OFF temperature.
Range: 0°C~10°C
Example: setpoint (T )>maximum heat pump temperature–[6‑01]
U
(T –[6‑01])
HP MAX
T
DHW
T = T
60
U BUH OFF
T
50
HP MAX
[6-01]
T
48
[6-00]
HP OFF
T 46
HP ON
40
30
20
HP
10
5
BUH Backup heater
HP Heat pump. If heating up time by the heat pump takes too
long, auxiliary heating by the backup heater can take place
T Backup heater OFF temperature (T
BUH OFF
T Maximum heat pump temperature at sensor in domestic
HP MAX
hot water tank
T Heat pump OFF temperature (T
HP OFF
T Heat pump ON temperature (T
HP ON
T Domestic hot water temperature
DHW
T User set point temperature (as set on the user interface)
U
t Time
Example: setpoint (T )≤maximum heat pump temperature–[6‑01]
U
(T –[6‑01])
HP MAX
EPGA11~16DAV3 + EAVH/X16S18+23DA6V+9W
Description
DHW
T
a
[0-0E] [0-0D]
: The desired tank temperature.
low outdoor ambient
high outdoor ambient
below the low ambient
above the high ambient
Description
T = 60°C
U
T = 50°C
BUH HP MAX HP
[6-01] = 2°C
[6-00] = 2°C
)
U
−[6-01])
HP MAX
−[6-00])
HP OFF
Daikin Altherma – Low temperature split
4P556070-1 – 2019.02
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