Equithermic 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).
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- Outdoor temperature
- Temperatures from zones
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- Outdoor temperature
- Temperatures from zones
- Humidity from zones
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- Set point of virtual thermostat for primary circuit
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- Minimal / Maximal set point
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- Minimal / Maximal set point
- Dew point limit (Early warning)
Calculates minimal set point temperature based on highest relative humidity from all linked zone thermostats
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| Info |
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For more information about cooling / heating modes, see Heating and Cooling modes. |
How final set point is calculated
Equitherm curve returns temperature of flow water based on outdoor temperature. Angle of the curve, parallel shift, temperature limits and adjustments based on data from thermostats are affecting the final results.
Angle
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:
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doc_tap_Equithermic_mode;
| doc_tap_HeatM; | doc_tap_CoolllM; | |
|---|---|---|
| doc_tap_Inp; | doc_tap_OutTemp; | doc_tap_OutTemHu; |
| doc_tap_Ootp; | doc_tap_Setcirc; | doc_tap_Setvirtualcirc; |
| doc_tap_Lim; | doc_tap_MinMax; | doc_tap_MinMaxDewCalTher; |
| doc_tap_PIDc; | doc_tap_(XXX); | doc_tap_(XX); |
| Info |
|---|
doc_tap_moreInnfo; |
doc_tap_HowFinal;
doc_tap_EqCurveReturn;
doc_tap_Angleee;
doc_tap_FloorTableCurve;
| doc_tap_OuTem; | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| doc_tap_Angle; | -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.
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Example scenario for zone hydronic heating with equitherm regulation
Example scenario for zone hydronic cooling with equitherm regulation
Related articles
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doc_tap_outdoor_37ºC;
doc_tap_Parallel_shift;
doc_tap_Increases_41ºC;
doc_tap_Adjustments_ther;
doc_tap_zone_term_ew;
| doc_tap_Heatmmm; | doc_tap_Coolm; | |
|---|---|---|
| doc_tap_fZones; | doc_tap_shiftup22; | doc_tap_shiftdown22; |
| doc_tap_Res; | doc_tap_setphig22; | doc_tap_setplow22; |
| doc_tap_Dewplim; | doc_tap_n; | doc_tap_setpzones; |
doc_tap_Ex_hyeating_eq;
doc_tap_Ex_cooling_eq;
