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3 - FEATURES
3.4 - Mixing damper
If a mixing damper is present in the unit (P27 = with), it is necessary to configure its opening time (P166).
Mit den Parametern P208 und P209 kann eine Mindest-Öffnung eingestellt werden.
The damper operates with 100% fresh air in night cooling or free cooling mode. It is modulated when there is an air quality requirement.
If there is a mixing damper present and the mixing opening demand is greater than 95%, then the outdoor side isolation dampers (if
present) close.
The mixing damper can be forced to close using parameter P163 (accessible via BMS)
27
163
166
208
209
3.5 - Filter management
Pressure sensors measure the filter fouling (intake and exhaust), and a fault appears if the filter is fouled (new filter to be ordered and
replacement scheduled) or blocked (machine is shut down).
The threshold is calculated automatically according to the filter type (M5, F7, F9, M5+F7, M5+F9, F7+F9) and the air flow rate.
It is possible to view the pressure difference and thresholds for each filter (P312 to P317).
7
8
15
16
3.6 - Temperature control
The set temperature may be:
- The return air temperature
- The room temperature (if the Th-Tune room remote control is present)
- The supply air temperature
This choice is made via parameter P154.
The temperature is set via a PID which calculates a heating requirement (P395) or a cooling requirement (P394). There is one heating
setpoint (P180) and one cooling setpoint (P170), with the option to have a deadband between these two different setpoints. The
calculated requirement is then divided between the heating or cooling elements, in the following order of priority: heat recovery unit,
hydraulic coils, electric heater.
Heating requirement (%)
P182 Proportional band
- The heating and cooling setpoints must not overlap in automatic mode (P155)
- In heating only or cooling only mode, the setpoints may overlap.
154
155
168
Cooling PID
170
171
172
173
174
Mixing damper
load shedding of mixing damper
Mixing damper opening time
Mixing damper minimum setpoint 1
Mixing damper minimum setpoint 2
Intake filter type
Intake filter coefficient
Exhaust filter type
Exhaust filter coefficient
Heating
setpoint
Setpoint 1: P180
Setpoint 2: P181
Target temperature selection
Temperature control mode selection
Heating or cooling change authorisation time delay
Temperature setpoint 1 in cooling mode
Temperature setpoint 2 in cooling mode
Temperature control PID proportional band (P) in cooling mode
Temperature control PID integral time (I) in cooling mode
Temperature control PID derivative time (D) in cooling mode
Cooling requirement (%)
P172 Proportional band
Cooling
setpoint
Setpoint 1: P170
Setpoint 2: P171
Room temperature
Return air temperature
Supply air temperature
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