Equithermic smart rule can be used in both modes - heating and cooling.regulation is set of methods that calculate set point for temperature of heating or cooling medium.
If attributes are set correctly, it should be possible to achieve desired temperature in zones with coolest possible medium (in heating mode) or warmest possible medium (in cooling mode).
| Heating mode | Cooling mode | |
|---|---|---|
| Inputs |
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| Output |
| - Set point of virtual thermostat for primary circuit |
| Limits |
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| PID correction |  | |
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| Info |
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For more information about cooling / heating modes, see Heating and Cooling modes. |
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Example scenario for zone hydronic cooling with equitherm regulation
How final set point is calculated
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For floor heating systems, values between 0.2 and 0.8 are commonly used. Lower values are more suitable for high quality insulation.
Table below shows resulting set point temperature based on outdoor temperature and angle of the curve:
| Outdoor temperature | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| SlopeAngle: | -20ºC | -15ºC | -10ºC | -5ºC | 0ºC | 5ºC | 10ºC | 15ºC | 20ºC |
| 0.2 | 33 | 32 | 32 | 30 | 29 | 27 | 24 | 22 | 20 |
| 0.4 | 42 | 40 | 38 | 36 | 33 | 30 | 27 | 24 | 20 |
| 0.6 | 50 | 48 | 45 | 41 | 37 | 33 | 29 | 25 | 20 |
| 0.8 | 59 | 56 | 52 | 47 | 42 | 37 | 31 | 26 | 20 |
| 1.0 | 65 | 61 | 57 | 53 | 47 | 40 | 34 | 27 | 20 |
| 1.2 | 74 | 69 | 64 | 58 | 52 | 44 | 37 | 28 | 20 |
| 1.5 | 82 | 76 | 70 | 64 | 58 | 50 | 40 | 30 | 20 |
| 1.75 | 90 | 84 | 77 | 71 | 63 | 54 | 43 | 32 | 20 |
| 2.0 | 90 | 90 | 84 | 77 | 70 | 60 | 47 | 34 | 20 |
| 2.25 | 90 | 90 | 88 | 82 | 75 | 65 | 52 | 36 | 20 |
| 2.5 | 90 | 90 | 90 | 87 | 80 | 70 | 56 | 38 | 20 |
| 2.75 | 90 | 90 | 90 | 90 | 84 | 73 | 57 | 38 | 20 |
| 3.0 | 90 | 90 | 90 | 90 | 86 | 77 | 61 | 41 | 20 |
E.g. if outdoor temperature is 0ºC and angle of equithermic curve is 0.6, resulting set point temperature is 37ºC.
Parallel shift
Increases or decreases the curve by defined value.
E.g. if set point temperature based on angle of curve is 37ºC, and parallel shift is set to 4ºC, resulting set point is 41ºC.
Adjustments based on data from thermostats
All zone termostats that are linked to equithermic smart rule are affecting the final result.
| Heating mode | Cooling mode | |
|---|---|---|
| Set point from zones | Equithermic curve will be shifted up if highest set point of zone thermostats is more than 22ºC | Equithermic curve will be shifted down if lowest set point of zone thermostats is less than 22ºC |
| Result | Resulting set point = Set point based on angle and parallel shift + Ratio * (highest zone setpoint - 22) | Resulting set point = Set point based on angle and parallel shift + Ratio * (lowest zone setpoint - 22) |
| Dew point limit | -- | Resulting set point can not be less than dew point temperature calculated from highest relative humidity in zones |
Example scenario for zone hydronic heating with equitherm regulation
Example scenario for zone hydronic cooling with equitherm regulation
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