22
Smarty 2R VE / 2R VE plus
www.salda.lt
The winter/summer function is used to set upcoming cold periods, because some part of the system need to be protected against cold outdoor air.
During the winter period it is recommended to leave the unit on, therefore it is possible to set that the system switch-off is blocked during the winter
period. Water heaters must be always on during the entire winter period.
The winter mode may be indicated:
• Manually
• By date
• Based on 3-day mean outdoor air temperature. The mean is calculated only when the fresh air (outdoor) pre-heater is off.
This function is designed to protected 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 30%, fans start operating at speed 2 in comfort mode. A user is notified of the activated protection and limited air
flow.
If the humidity mean exceeds 30% or the function is switched off manually, fans start operating at speed 3 in comfort mode.
This function is designed to save energy which is used to cool a building in the morning by cool night air.
If the function is on but not active, activation conditions are checked:
1 - System time is between function start and function end (hours/minutes).
2 - Time is every hour since the start.
3 - If “Stand-by” mode is set, the unit operates in “Building protection” for 5 minutes so that the actual temperature data is available. Temperatures
are checked after purging. If wrong temperatures are received the unit returns to “Stand-by” mode.
4 - Outdoor temperature is higher than the set outdoor temperature.
5 - Extract air temperature is higher than the set temperature.
6 - Extract air temperature is higher than the outdoor temperature by at least 2 °C.
7 - Summer time.
If all conditions are fulfilled the unit starts operating in “Comfort” mode (without temperature maintenance). The main window shows that the night
cooling function is active.
Where the function is active, the deactivation conditions are regularly checked:
1 - Time does not correspond to the start/end interval.
2 - Extract air temperature drops below the set point.
3 - Outdoor air temperature drops below the set point.
4 - Mode other than “Comfort” was switched or the unit has been shut down
If at least one condition is correct, the unit switches off the night cooling function and it switches to the mode that was on prior to activating the function.
This function is designed to maintain a proper quality of room air.
Where CO
2
exceeds the permissible limit, CO
2
reduction is activated and air flow is increased. When CO
2
reaches the set point, this function is
switched off.
Filter Timer Settings
Filter timer limit is set to the function. The maximum setting can be 1 year.
This function is designed to activate the preferred system mode by means of an external contactor. The function indicates a type of a signal to be sent
to the input.
Possible types of signals:
•
Not used
• Button click. Selected system mode is activated. Function is activated when it receives an impulse. It is deactivated when it receives the impulse
again.
•
On/off.
Selected system mode is activated. Mode is active when contactor is on.
• PIR sensor. When the sensor is activated, the selected system mode is activated. If the signal is not received within 30 minutes, the mode is
deactivated.
Weekly Schedule
A weekly schedule consists of 10 weekly events. They can be added, deleted, activated and deactivated. One event indicates time, mode and days
of the week.
The system changes modes based on the weekly schedule only when the indicated time comes; therefore a user can always change the existing mode
manually. This schedule notifies the user of the upcoming mode change by indicating the time remaining till the next event.
Holiday Schedule
A holiday schedule is used when the unit has to operate in an indicated mode during holidays. The user interface shows when the schedule period is
active as the mode activated by this function (except for protections) can be changed by no-one. 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 period dates must be changed. Up to five holiday periods can
be indicated.