7.1.3 Extra credit
300 Humidity sensor (accessory)
Activation of the connected humidity sensor.
301 Moisture setpoint
Setpoint for humidity control, RF%.
302 Capacity increase
Capacity increase of supply and extract air in % with humidity control.
303 Coupling diff humidity control
Switching differential for humidity control. Starts at the setpoint, stops at the setpoint minus the switching differential.
304 Control signal VVX for humidity control
Maximum limit on the control signal to the rotary heat exchanger during active humidity control. This function minimises the heat exchanger’s humidity recovery.
When moisture is reduced, the rotor loses some efficiency.
310 Supply air pressure control (accessory)
Activation of function. Off/Pressure/Flow/Slav/Measurement Pa/Measurement l/s.
- Print: The supply air fan adjusts to maintain the set pressure.
- Flow: The supply air fan regulates the flow to achieve the set flow rate; the flow meter is required.
- Slav: The supply air fan follows the extract air fan, with a differential set in parameter 313.
- Measured value in Pa: No control of the supply air fan; only a display of the current pressure.
- Measured value l/s: No control of the supply air fan; only a display of the current flow rate.
Slave can only be selected if the extract air is not slave.
311 Exhaust air pressure control (accessory)
Activation of function. Off/Pressure/Flow/Slav/Measurement Pa/Measurement l/s.
- Print: The extract fan adjusts its operation to maintain the set pressure.
- Flow: The extract fan adjusts to achieve the set flow rate; a flow meter is required.
- Measured value in Pa: No control of the supply air fan; only a display of the current pressure.
- Measured value l/s: No control of the supply air fan; only a display of the current flow rate.
Slave can only be selected if the supply air is not slave.
312 Pressure sensor measuring range
Linear input signal, 0V from the pressure sensor corresponds to 0Pa and 10V corresponds to the set value in the parameter.
313 Slave control Difference
The control signal of the fan set to slave receives the control signal of the other fan + set differential.
- Supply air = slave -> Supply air control signal = extract air control signal + percentage difference.
- Exhaust air = slave -> Exhaust air control signal = supply air control signal + percentage difference.
314 K-factor
K-factor for flow control in l/s, see flow measurement cone.
| Type | K-factor | Unit |
|---|---|---|
| A590T | 25,8 | l/s |
| A600S/T | 25,8 | l/s |
| A890T | 32,2 | l/s |
| A900S/T | 32,2 | l/s |
| A1 | 32,2 | l/s |
| A2 | 52,2 | l/s |
315 Pressure control P-factor
P-factor of the pressure regulator.
P-Band = Pressure setpoint * P-Factor.
316 Pressure regulation I-Tid
Integration time of the pressure regulator.
317 Alarm limit pressure deviation
Alarm is triggered if the pressure setpoint is not reached within the pressure deviation tolerance and after the alarm delay time.
The same alarm limit applies to supply and extract air.
330 Air quality sensor (accessory)
Activation of the connected air quality sensor. Adjusts the settings based on air quality only when the timer function is active. The air quality control symbol is displayed in the “External” box; when the ‘Save’/‘Comfort’ and ‘Boost’ buttons are pressed, the timer symbol is displayed to indicate the current capacity.
Drift mode Spruce if the air quality value is less than the setpoint for parameter 332 – the switching differential for parameter 333.
Drift mode Forcing if the air quality value is higher than the target value for parameter 332 plus the switching differential for parameter 333.
Drift mode Comfort and convenience if the air quality value is between the target value for parameter 332 and the switching difference for parameter 333.
Hysteresis 1/10 of the coupling difference in parameter 333.
331 Air quality sensor measuring range
Maximum measuring range of the air quality sensor.
Linear input signal, 0V from the air quality sensor corresponds to 0 PPM and 10V corresponds to the set value in the parameter.
332 Setpoint air quality sensor
Air quality set point value, in PPM.
333 Switching differential air quality sensor
Air quality coupling differential, in PPM.
