VALLOX 180 SE
6
INSTRUCTIONS FOR USE
2.8.
© VALLOX • We reserve the right to make changes without prior notification.
Remember!
Switch post-heating off when it starts
to get too warm in the dwelling becau-
se of warm weathers.
Switch post-heating on again when it
gets cooler in autumn.
2.8. Post-heating
For most of the year, heat recovered from air to be extracted is enough to warm the cold air
coming from the outside to a suitable temperature. If the heat of extract air is not enough, air
coming from the outside may be heated further, as needed, with the radiator delivered with the
unit.
The post-heating radiator may be electric or water-circulating. Heating can in both cases be
activated at the control panel (see the instructions for using the control panel in Section 3.1.).
When heating has been activated, the unit automatically adjusts the temperature selected.
2.9. Supply air constant temperature control
• VALLOX 180 SE has a relative post-heating control; when the temperature selected exceeds
supply air temperature by more than 2.5
°
C, the radiator is on at 100%, and when the
temperature difference gets smaller, the period of active operation is automatically reduced in
two-minute sequences. The adjustment range for heating is 10...30
°
C.
• The heating radiator is on when the ( ) sign is displayed.
• Temperature control is only active when post-heating has been switched on.
2.10. Supply air cascade control
• Supply air temperature control can be changed into cascade control.
• It changes the controlling principle of the post-heating radiator. The temperature of air blown
to the ventilation zone is controlled on the basis of extract air.
• The program tries to keep supply air temperature at a value determined by the difference
between extract air and the setpoint as follows: If extract air is warmer than the setpoint,
supply air temperature is lower than the setpoint by the difference. If extract air is colder,
supply air is higher than the setpoint by the difference.
As an example, if the temperature in the ventilation zone is 25
°
C and the setpoint is 24
°
C,
the aim is to blow 23
°
C air to the ventilation zone. If the temperature in the ventilation zone is
24
°
C and the setpoint is 25
°
C, the aim is to blow 26
°
C air to the ventilation zone.
• The aim is to keep the temperature of air blown to the ventilation zone always within the range
of 10...30
°
C.
• Cascade control can be selected at the control panel, and it is active when post-heating has
been switched on.
• The heating radiator is on when the ( ) sign is displayed.
2.11. Heat recovery bypass function
• The bypass function tries to get as cool supply air as possible to the ventilation zone by
comparing the measuring results of the outdoor air and extract air sensors.
• The heat recovery cell is bypassed when post-heating is switched off, outdoor air temperature
is two degrees more than the setpoint and extract air is warmer than outdoor air.
• The setpoint can be changed between 0…+25
°
C. (Factory setting 12
°
C.)
