Domestic Hot Water Control; Contact/Helpdesk Number; Weather-Dependent Curve; What Is A Weather-Dependent Curve - Daikin Altherma 3 R F Installation Manual

7 Configuration
7.2.5

Domestic hot water control

# Code
[A.4.1] [6-0D] Domestic hot water Type:
▪ 0
operation is allowed.
▪ 1 (Reheat + sched.): Same as 2, but
between the scheduled heatup cycles,
reheat operation is allowed.
▪ 2 (Scheduled
hot water tank can ONLY be heated
according to a schedule.
[A.4.5] [6-0E] The maximum temperature that users
can select for the domestic hot water.
You can use this setting to limit the
temperature at the hot water taps.
INFORMATION
There is a risk of space heating (or cooling) capacity
shortage/comfort problem when selecting [6‑0D]=0 ([A.4.1]
Domestic hot water Type=Reheat only).
In case of frequent domestic hot water operation, frequent
and long space heating interruption will happen.
7.2.6

Contact/helpdesk number

# Code
[6.3.2] N/A Number that users can call in case of
problems.
7.3

Weather-dependent curve

7.3.1

What is a weather-dependent curve?

Weather-dependent operation
The unit operates 'weather dependent' if the desired leaving water or
tank temperature is determined automatically by the outdoor
temperature. It therefore is connected to a temperature sensor on
the North wall of the building. If the outdoor temperature drops or
rises, the unit compensates instantly. Thus, the unit does not have to
wait for feedback by the thermostat to increase or decrease the
temperature of the leaving water or tank. Because it reacts more
quickly, it prevents high rises and drops of the indoor temperature
and water temperature at tap points.
Advantage
Weather-dependent operation reduces energy consumption.
Weather-dependent curve
To be able to compensate for differences in temperature, the unit
relies on its weather-dependent curve. This curve defines how much
the temperature of the tank or leaving water must be at different
outdoor temperatures. Because the slope of the curve depends on
local circumstances such as climate and the insulation of the house,
the curve can be adjusted by an installer or user.
Availability
The weather-dependent curve is available for:
▪ Main zone - Heating
▪ Main zone - Cooling
▪ Additional zone - Heating
▪ Additional zone - Cooling
▪ Tank
Installation manual
24
Description
(Reheat only): Only reheat
only): The domestic
Description
INFORMATION
To operate weather dependent, correctly configure the
setpoint of the main zone, additional zone or tank. See
"7.3.3 Using weather-dependent
7.3.2

2-points curve

Define the weather-dependent curve with these 2 setpoints:
▪ Setpoint (X1, Y2)
▪ Setpoint (X2, Y1)
Example
Set weather-dependent heating
T
t
Y2
Y1
X1 X2 T
a
Confirm Adjust Scroll
X1, X2 Examples of outdoor ambient temperature
Y1, Y2 Examples of desired tank temperature or leaving water
temperature
7.3.3

Using weather-dependent curves

Configure weather-dependent curves as following:
To define the setpoint mode
To use the weather-dependent curve, you need to define the correct
setpoint mode:
Go to setpoint mode ...
Main zone – Heating/Cooling
[A.3.1.1.1] Main > LWT setpoint
mode
Additional zone – Heating/Cooling
[A.3.1.2.1] Additional > LWT
setpoint mode
Tank
[A.4.6] Domestic hot water
(DHW) > SP mode
To change the weather-dependent curve
Zone
Main zone – Heating
Main zone – Cooling
Additional zone – Heating
Additional zone – Cooling
Tank
INFORMATION
Maximum and minimum setpoints
You cannot configure the curve with temperatures that are
higher or lower than the set maximum and minimum
setpoints for that zone or for the tank. When the maximum
or minimum setpoint is reached, the curve flattens out.
To fine-tune the weather-dependent curve
The following table describes how to fine-tune the weather-
dependent curve of a zone or tank:
curves" [ 4 24].
Set the setpoint mode to ...
Weather dep. OR WD/
scheduled
Weather dep. OR WD/
scheduled
Weather dep.
Go to ...
[7.7.1.1]Main > Set weather-
dependent heating
[7.7.1.2] Main > Set weather-
dependent cooling
[7.7.2.1]Additional > Set
weather-dependent heating
[7.7.2.2] Additional > Set
weather-dependent cooling
[A.4.7] Domestic hot water
(DHW) > Weather-dependent
curve
EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596818-1D – 2021.10