Daikin EWAA011DAV3P - Weather-Dependent Curve; What Is a Weather-Dependent Curve

5 | Operation
User reference guide
38
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620246-1B – 2023.11
For the procedure to set the electricity price, see "To set the electricity
price"[437].
Example
This is an example and the prices and/or values used in this example are NOT
accurate.
Data Price/kWh
Gas price 4.08
Electricity price 12.49
Renewable heat incentive per kWh 5
Calculation of the gas price
Gas price=Actual gas price+(Incentive/kWh×0.9)
Gas price=4.08+(5×0.9)
Gas price=8.58
Calculation of the electricity price
Electricity price=Actual electricity price+Incentive/kWh
Electricity price=12.49+5
Electricity price=17.49
Price Value in breadcrumb
Gas: 4.08/kWh [7.6]=8.6
Electricity: 12.49/kWh [7.5.1]=17
5.8 Weather-dependent curve
5.8.1 What is a weather-dependent curve?
Weather-dependent operation
The unit operates 'weather-dependent' if the desired leaving water 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 leaving water
temperature. Because it reacts more quickly, it prevents high rises and drops of the
indoor temperature.
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 leaving water
temperature 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.
Types of weather-dependent curve
There are 2 types of weather-dependent curves: