Winter/Summer Mode; Boost Function; Humidity Control; Air Flows Control According To Extract Air Humidity - Salda MCB Technical Manual

5.8. WINTER/SUMMER MODE

The winter/summer function is set during the cold periods, because some parts of the system have to be protected against cold outdoor air. During
winter it is recommended to leave the unit switched on, therefore it is possible to set blocking of switch-off. Water heaters must be always switched
on during the entire winter.
The winter mode may be indicated
› Manually;
› By date;
› Based on 3-day mean outdoor temperature, to be calculated only when the fresh air (outdoor) pre-heater is off.

5.9. BOOST FUNCTION

Boost ventilation function is used for fast ventilation of premises. It activates the maximum air-flow (speed 4). Boost ventilation has be temporary,
i.e. it must be a final condition (e.g. CO
dry air is harmful for health.
The function is activated by pressing ON and deactivated by pressing OFF button in the BOOST section, or by means of an external contactor (FANS
SPEED SWITCH), which is configured in the service environment (SERVICE › MAIN › FANS SPEED SWITCH) section.
The function is inactive when Stand-by mode is on. Time limit is indicated (ADJUSTER › USER SETTINGS › BOOST TIMER or USER › MENU › SETTINGS ›
BOOST TIMER). Once the function is activated, the time is set by the timer and the time is counted till its deactivation. It may be adjusted in real-time,
i.e. when the function is on, in ADJUSTER › VENTILATION CONTROL or in the user environment main window.

5.10. HUMIDITY CONTROL

5.10.1. AIR FLOWS CONTROL ACCORDING TO EXTRACT AIR HUMIDITY

When this function is turned on, the winter and summer humidity limits are indicated. If the 3-day average value of extract air humidity exceeds
the set limit, the air flow is increased by one speed and the moment humidity rise is set on the basis of the 3-day average value. Otherwise, the
moment humidity rise is established according to the set limit.
If the moment extract air humidity exceeds the set limit by more than 10 % for more than 5 minutes, then the moisture excess removal (intensive
ventilation) is activated for the specified time period (30 minutes).

5.10.2. DRYNESS PROTECTION

This function is designed to protect premises against dryness. If the function is active, it calculates the 3-day mean humidity of extract air from the
premises. If the mean drops below set limit (30 %), fans start operating in speed 2 in comfort mode. A user is notified of the activated protection
and limited air flow.
If the humidity mean exceeds set limit (30 %) or the function is switched off manually, fans start operating in speed 3 in comfort mode.
The function is switched on/off in the section ADJUSTER › USER SETTINGS › DRYNESS PROTECTION or in the window USER › MENU › SETTINGS › OTHER.

5.11. NIGHT COOLING FUNCTION

This function is designed to save energy in the morning, when a fresh night air is used to cool down the building. The function is active only in
summer. If it is switched on but not active yet, activation conditions are checked:
› System time from function start to the end (hours/minutes);
› Time is exactly every hour since the start;
› If STAND-BY MODE is set, the unit operates in BUILDING PROTECTION MODE for 5 minutes so that the actual temperature data is available. The
temperature is checked after purging. If it is not suitable, the unit returns to STAND-BY MODE;
› Outdoor temperature is higher than the set outdoor temperature;
› Exhaust air temperature is higher than the set temperature;
› Exhaust air temperature is higher than the outdoor temperature by at least 2 °C;
› Summer.
If all conditions are met the unit starts operating in COMFORT MODE (without temperature maintaining). The main window shows that the Night
cooling function is active. When it is active continuously, the deactivation conditions are checked:
› Time does not correspond to the start/end interval;
› Exhaust air temperature drops below the set temperature;
› Outdoor temperature drops below the set temperature;
› Mode other than COMFORT was switched or the unit has been shut down.
If at least one condition is met, the unit switches off the Night cooling function and it switches to the mode that was on prior to activating the
function. The function is configured in the section ADJUSTER › USER SETTINGS › NIGHT COOLING FUNCTION or in the window USER › MENU › SETTINGS
› NIGHT COOLINGS.

5.12. AIR FILTER TIMER

The air filter timer indicates to the user when the filters are clogged. After their replacement, the timer must be reset. The user can always see
how many days are left till the filter replacement. The timer limit can be set in the service environment. Maximum permissible time – 1 year. It is
calculated only when the fans are rotating.
The filter timer can be reviewed and reset in the section ADJUSTER › USER SETTINGS › FILTERS TIMER or in the window USER › MENU › SETTINGS ›
FILTERS TIMER.
The time limit is indicated in the service environment SERVICE › MAIN › AIR FILTERS PROTECTIONS.
MCB_miniMCB v2019.1
limit, time). The reason for this limitation – protection against dryness. High air flow reduces humidity, and
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