Salda SMARTY XV Series, Руководство пользователя

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20 | DE SMARTY XV v2019.06
› PID CONTROLLERS ADJUSTING › FANS SPEED CONTROL BY AIR FLOW OR PRESSURE
. Each fan is controlled individually.
In the service environment window
SERVICE › FANS › FANS SPEED CONTROL
you can limit the minimum and maximum fan control signal voltage. Based on
manufacturer set parameters, the minimum 2V voltage is indicated, which means that 0V voltage signal is sent when fans are off, and 2V voltage
signal is immediately switched on when rotation is required.
It is possible to specify the nominal flows of supply and exhaust air. Then, the maximal air flow is calculated automatically.
19.8. “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
2
limit, time). The reason for this limitation – protection against dryness. High air flow reduces humidity, and
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.
19.9. WEEKLY SCHEDULE
A weekly schedule consists of 10 weekly events. They can be added, deleted, activated and deactivated. One event indicates time,
mode/BOOST
function, days of the week. Also it is possible to indicate the change of settable mode temperature.
The system changes modes according to the Weekly Schedule only at the indicated times, therefore a user can always change the existing mode
manually. This schedule notifies of the upcoming mode change by indicating the time remaining till the next event.
The schedule is edited in user environment
USER › MENU › SCHEDULE
.
19.10. HOLIDAY SCHEDULE
This schedule is used when the unit has to operate in uniform mode during holidays. The user interface shows when the schedule period is active
as nobody can change the mode activated by this function (except for protection). In order to control the system in a normal manner, the Holiday
Schedule period must be deactivated, i. e. zero values must be indicated or dates must be changed. Up to five holiday periods can be set.
The schedule is edited in the user environment
USER › MENU › HOLIDAY
.
19.11. 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 always be 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.
19.12. 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
.
19.13. 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 from 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 tempera-
ture 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.