Slope-Offset Curve; Using Weather-Dependent Curves - Daikin ETBH12EF6V Installation Manual

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.
7.3.3

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:
ETBH/X12EF6V+9W
Daikin Altherma 3 H MT W
4P634879-1 – 2021.03
a
Description
water for different ambient
water for different ambient
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
Y1, Y2, Examples of desired tank temperature or leaving water
Y3, Y4 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
Select slope or offset.
Increase or decrease the slope/offset.
When slope is selected: set slope and go to offset.
When offset is selected: set offset.
Confirm changes and return to the submenu.
7.3.4

Using weather-dependent curves

Configure weather-dependent curves as following:
7 Configuration
c
e
d
c
e
d
X2
Description
changed, the new preferred
changed, the new preferred
Installation manual
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