Technical data

9
CTC EcoZenith i250
General Information
Adjusting the heating curve
The method described below can be used to adjust the heating curve correctly.
Adjustment if it is too cold indoors
• If the outdoor temperature is lower than 0 degrees:
Increase the Inclination value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
• If the outdoor temperature is higher than 0 degrees:
Increase the Adjustment value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
Adjustment if it is too warm indoors
• If the outdoor temperature is lower than 0 degrees:
Decrease the Inclination value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
• If the outdoor temperature is higher than 0 degrees:
Decrease the Adjustment value by a couple of degrees.
Wait 24 hours to see if any further adjustment is required.
!
If the values set are too low, this may mean that the desired room temperature
is not being reached. You then need to adjust the heating curve, as necessary,
following the method shown above.
When the basic values have been set more or less correctly, the curve can be
finely adjusted directly using the Room temp. shown on the home menu screen.
Description of inclination and adjustment
Inclination 50:
The value set is the outgoing temperature of the water supplied to the radiators at an
outdoor temperature of –15°C, e.g. 50°C. A lower value is selected where a radiator
system has large radiator areas (a low temperature system). Floor heating systems
require low temperatures. A low value should therefore be selected. The value must be
increased for high temperature systems to achieve a high enough indoor temperature.
Adjustment 0:
The adjustment means that the flow temperature can be raised or lowered at a specific
outdoor temperature.
Adjustment 0 means 50°C primary flow when the outside temperature is -15°C.
Adjustment -5 means 45°C primary flow when the outside temperature is -15°C.
For example:
Inclination 50 means that the temperature of the water supplied to the radiators will
be 50°C when the outdoor temperature is –15°C (if adjustment is set to 0). If the
adjustment is set to +5, the temperature will be 55°C instead. The curve is increased
by 5°C at all temperatures, i.e. it is parallel displaced by 5°C.