5
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Operation
User reference guide
32
EKHWET90~120BAV3
R32 Split series – Domestic hot water tank
4P680076-1 – 2021.11
5.8.3 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 target temperature of
the tank for different ambient temperatures. For example, if tank water
temperature is in general fine but at low ambient temperatures too cold, raise
the slope so that the tank temperature is heated increasingly more at
decreasingly lower ambient temperatures.
▪
Change the
offset
to equally increase or decrease the target temperature of the
tank for different ambient temperatures. For example, if the tank temperature is
always a bit too cold at different ambient temperatures, shift the offset up to
equally increase the tank target temperature for all ambient temperatures.
Examples
Weather-dependent curve when slope is selected:
X1
X2
c
d
Y1
Y2
Y3
Y4
a
b
Weather-dependent curve when offset is selected:
Y1
Y2
Y3
Y4
X1
X2
a
b
c
d
Item
Description
a
WD curve before changes.
b
WD curve after changes (as example):
▪
When slope is changed, the new preferred temperature at X1 is
unequally higher than the preferred temperature at X2.
▪
When offset is changed, the new preferred temperature at X1 is
equally higher as the preferred temperature at X2.
c
Slope
d
Offset
X1, X2
Examples of outdoor ambient temperature
Y1, Y2, Y3,
Y4
Examples of desired tank temperature. The icon corresponds to the
heat emitter for that zone:
▪
: Domestic hot water tank
