Control Features; Control Logic - LMF Clima HRH Mode D'emploi



Automatic / manual fan speed selection

Changeover floating valve management
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Heating floating valve management
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Water coil antifreeze management
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Modulating electric heater management (PWM)
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Filter pressure switch management
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Fan management by CO2 sensor
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Fan management by 1 pressure sensor
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By-pass damper management
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Boost function
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Alarm management and diagnostic
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Post ventilation
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Clock program management
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Remote display with internal temperature sensor
BMS Modbus protocol RS485
In the following diagrams is explained the summer-winter control logic
Cooling logic (Summer)
Tsp-Treg
+
= 0.5°C
- 0
- = 1°C
= Cooling valve proportional band
= Free-cooling differential
= Free-cooling Hysteresis
Only ventilation
By-pass (freecooling)
Cooling modulation 1-99%
Cooling 100%
Example cooling mode (summer):
Treg= 27°C
Tsp= 26°C
Te= 20°C
--------------------------------------------
Tsp-Treg= 26-27= -1°C
Tsp-Te= 26-22= +4°C
firmware 0.26
Electronic Control "HRH-HRS" User Manual

1 Control Features:

2 Control logic

= 2°C
+
Tsp-Te
= 2°C
Treg = regulation probe temperature
Tsp = set point temperature
Te = external probe temperature
= 2°C
-
= 2°C
= Heating valve proportional band
= Free-heating differential
= Free-cooling Hysteresis
Only ventilation
By-pass (freeheating)
Heating modulation 1-99%
Heating 100%
Example heating mode (winter):
Treg= 19°C
Tsp= 20°C
Te= 10°C
-------------------------------------------
Tsp-Treg= 20-19= +1°C
Tsp-Te= 20-10= +10°C
Rev.06
Heating logic (Winter)
Tsp-Treg
+
0
= 0.5°C
= 1°C -
ENG
+
Tsp-Te
EN 4/ 23