2-Points Curve; Slope-Offset Curve - Daikin ETVH12S18EA6V Operation Manual

4 Operation
Types of weather-dependent curve
There are 2 types of weather-dependent curves:

▪ 2-points curve

▪ Slope-offset curve

Which type of curve you use to make adjustments, depends on your
personal preference. See
curves" [ 4 17].
Availability
The weather-dependent curve is available for:
▪ Main zone - Heating
▪ Main zone - Cooling
▪ Additional zone - Heating
▪ Additional zone - Cooling
▪ Tank (only available to installers)
INFORMATION
To operate weather dependent, correctly configure the
setpoint of the main zone, additional zone or tank. See
"4.9.4 Using weather-dependent
4.9.2 2-points curve
Define the weather-dependent curve with these two setpoints:
▪ Setpoint (X1, Y2)
▪ Setpoint (X2, Y1)
Example
Y2
Y1
X1 X2
Item
a Selected weather dependent zone:
▪ : Main zone or additional zone heating
▪ : Main zone or additional zone cooling
▪ : Domestic hot water
X1, X2 Examples of outdoor ambient temperature
Y1, Y2 Examples of desired tank temperature or leaving water
temperature. The icon corresponds to the heat emitter
for that zone:
▪ : Underfloor heating
▪ : Fan coil unit
▪ : Radiator
▪ : Domestic hot water tank
Possible actions on this screen
Go through the temperatures.
Change the temperature.
Go to the next temperature.
Confirm changes and proceed.
Operation manual
16
"4.9.4 Using weather-dependent
curves" [ 4 17].
a
Description
4.9.3 Slope-offset curve
Slope and offset
Define the weather-dependent curve by its slope and offset:
▪ Change the slope to differently increase or decrease the
temperature of the leaving
temperatures. For example, if leaving water temperature is in
general fine but at low ambient temperatures too cold, raise the
slope so that leaving water temperature is heated increasingly
more at decreasingly lower ambient temperatures.
▪ Change the offset to equally increase or decrease the
temperature of the leaving
temperatures. For example, if leaving water temperature is always
a bit too cold at different ambient temperatures, shift the offset up
to equally increase the leaving water temperature for all ambient
temperatures.
Examples
Weather-dependent curve when slope is selected:
a b
Y4
Y3
Y2
Y1
X1 X2
Weather-dependent curve when offset is selected:
a b
Y4
Y3
Y2
Y1
X1
Item
a WD curve before changes.
b WD curve after changes (as example):
▪ When slope is
temperature at X1 is unequally higher than the
preferred temperature at X2.
▪ When offset is
temperature at X1 is equally higher as the preferred
temperature at X2.
c Slope
d Offset
e Selected weather dependent zone:
▪ : Main zone or additional zone heating
▪ : Main zone or additional zone cooling
▪ : Domestic hot water
X1, X2 Examples of outdoor ambient temperature
ETVH/X12S18+23EA6V+9W + ETBH/X12EF6V+9W
water for different ambient
water for different ambient
c
e
d
c
e
d
X2
Description
changed, the new preferred
changed, the new preferred
Daikin Altherma 3 H MT F+W
4P634883-1 – 2021.03