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Adjustment of Part of the Heat Curve
At outdoor temperatures between -5°C and +5°C part of the heat curve may need adjusting if the indoor
temperature does not stay at the preset ROOM value. For this reason, the control system includes a
function adjusting the curve at three outside temperatures: -5°C, 0°C, +5°C. This function will allow you
to increase or reduce the feed line temperature, without affecting the heat curve, at three specific outdoor
temperatures. If, for example, the outside temperature is -5°C, the feed line temperature will
gradually in the outdoor temperature range of 0°C to -10°C, maximum adjustment being reached
The diagram below shows an adjusted CURVE -5.
As we have seen, you can choose to adjust the heat curve at three specified out- side air temperatures:
-5°C,0°C and +5°C. The feed line temperature can be changed by plus/minus 3 degrees.
When outdoor ambient temperature is 5 , this setting is available to change the feed water temperature,
it is adjustable by operator: heat curve is not change (the slope is no change), but the point near 5
(from 0
to 10 ), curve can be change step by step; the variable is the biggest at 5 , it is
When outdoor ambient temperature is 0 ,this setting is available to change he feed water temperature,
it is adjustable by operator: heat curve is not change ( the slope is not change), but the point near 0
(from -5
to +5 ), curve can be change step by step; the variable is the biggest at 0 ,it is
When outdoor ambient temperature is -5 ,this setting is available to change he feed water temperature,
it is adjustable by operator: heat curve is not change ( the slope is not change), but the point near -5
(from 0
to -10 ), curve can be change step by step; the variable is the biggest at 0 ,it is ±3 .
If you wish to change a specific part of the heat curve:
1. Open the main menu INFORMATION by pressing the right-hand button once. You will find the cursor
at the sub- menu OPERATION.
2. Press the "down" button to move the cursor to the sub-menu HEAT CURVE.
3. Open the selected menu by pressing the right-hand button once. You will find the cursor at the
parameter CURVE.
4. Using the "up" or "down" button, select either CURVE 5, CURVE 0 or CURVE -5.
5. Open the selected curve by pressing the right-hand button once.
6. Raise or lower the value, using respectively the "up" or "down" button. To return to the main menu,
press the left- hand button three times.
Control
Adjustments to be made regularly
The point of maximum adjustment is clearly
.
34
change
at -5°C.
visible.
3
3 .
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