7.1.4 Features
400 ECO mode
Activation of the function.
- The heat recovery rotor (VVX) setpoint is equal to the set temperature setpoint in the current operating mode and the reheat gets a new temperature setpoint according to parameter 401.
- The temperature setpoint of the reheat can never be higher than the temperature setpoint of the heat recovery.
401 Setpoint ECO
- Fixed setpoint for reheat.
410 Cooling forcing
Activation of the function.
- Capacity increase of fans in case of cooling demand.
411 Refrigeration increase
- With the cooling control signal, the capacity of the supply air fan and extract air fan in the current operating mode in % is increased by the control signal with the value set in the parameter.
415 Refrigeration recovery
Activation of the function.
416 Cooling recovery difftemp
- The rotary heat exchanger starts when the extract air temperature is lower than the outdoor air temperature - set value in the parameter and cooling signal exceeds 10 per cent.
420 Free cooling via outside air
Activation of the function.
- The function means that when the conditions of parameters 441 and 442 are fulfilled, the supply air gets a new setpoint equal to the minimum limitation according to parameter 262.
421 Free cooling at outdoor air temperature
- Free cooling allowed at outdoor temperature higher than set value.
422 Free cooling at exhaust air temperature
- Free cooling start temperature when the extract air temperature exceeds the set value.
430 Defrosting
Activation of the function.
- The unit defrosts during the defrost time parameter 432 at regular defrost intervals parameter 433 if the outdoor air temperature is lower than the set value parameter 431.
- The function means that the supply air fan runs in 20% and the heat exchanger (rotor) runs on 78% control signal and that the exhaust air fan runs in at least 50% and any preheating is on.
431 Defrosting start at Utetemp
- Defrosting Start at outside temperature.
432 Defrosting time
- Defrosting time in minutes.
433 Defrosting interval
- Defrosting interval in minutes.
440 Winter drift
Activation of the function.
- Winter operation means that at a certain outdoor temperature, the capacity of the fans is adjusted and the moisture recovery of the rotor is reduced.
- When the outdoor air temperature is lower than the set start temperature, fan adjustment starts and has full adjustment at 10°C lower temperature than the start temperature.
- Moisture reduction means that the rotor recovers less moisture and problems with condensation on windows and other cold surfaces are reduced, however the efficiency is slightly reduced.
441 Winter operation Start temperature
- Winter operation starts at outdoor temperatures lower than the set value.
442 Winter operation Fan Supply air
- Max fan adjustment supply air.
443 Winter operation Fan Exhaust air
- Max fan adjustment exhaust air.
433 Winter operation Moisture reduction Rotor
- Adjusts the rotor moisture recovery.
- For moisture reduction, the appropriate value is 60 per cent.
480 Back-up operation
Back-up operation:
- Supply air fan = Off.
- Exhaust fan = On (capacity according to the respective operating mode).
- Rotor = On.
- Reheat = Off.
- Preheater = Off.
485 Fire function 1
The function is activated when the closure of input A or B is broken if either input is initialised as External Fire 1.
486 Fire function 2
The function is activated when the closure of input A or B is broken if either input is initialised as External Fire 2.
The fire function is selectable in four modes:
- Supply air fan off, extract air fan off. Preheating and reheating off.
- Supply air fan off, extract air fan 100 per cent. Pre- and post-heating off.
- Supply air fan 100 per cent, extract air fan off. Pre- and post-heating off.
- Supply air fan 100 per cent, extract air fan 100 per cent. Pre- and post-heating off.
