Salda SMARTY XV Series, Manual

Page: 21 / 48

DE | 21 SMARTY XV v2019.06
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 func -
tion.
The function is configured in the section
ADJUSTER › USER SETTINGS › NIGHT COOLING FUNCTION
or in the window
USER › MENU › SETTINGS › NIGHT COOLINGS
.
19.14. CO
2
REDUCTION FUNCTION
This function is designed to maintain a proper quality of room air. To activate it the exhaust air CO
2
sensor must be connected and properly config -
ured in the service environment window
SERVICE › SENSORS
. When completed, the exhaust air CO
2
value is displayed in the section
MONITORING
.
In the service environment window
SERVICE › MAIN › CO
2
REDUCTION FUNCTION
you can switch on/off the function, indicate preferred CO
2
level and allowable
limit; when it is exceeded (CO
2
set + allowable excess) CO
2
is reduced, information is displayed and air-flow is increased. When CO
2
reaches the
set point, reduction is switched off.
CO
2
protection is inactive in the stand-by and building protection modes.
19.15. FILTER PROTECTIONS
Filter Timer Settings
The filter timer limit is set in the service environment window
SERVICE › MAIN › AIR FILTERS PROTECTIONS
. The maximum setting is 1 year.
System Mode Communication with External Contactor
This function activates the preferred system switching on by means of external contactor; it indicates what signal will be sent to input. Possible
types of signals:
Not used;
Upon pressing a button the selected system mode is activated. After receipt of the first impulse the function is activated, and after second impulse
– deactivated;
On/off; selected system mode is activated. The mode is active while the contactor is on;
PIR sensor. When the sensor is activated, the selected system mode is activated. If the signal is not received for 30 minutes, the mode is activated.
Function is set in the service environment section
SERVICE › MAIN › SYSTEM MODE SWITCH
.
19.16. FAN SPEEDS FROM AN EXTERNAL SYSTEM CONTACTOR
This function is designed to activate/deactivate the boost ventilation function or preferred combination of fan speeds by means of an external
contactor.
The function indicates a type of a signal to be sent to the input and components controlled by it. Possible combinations of signal types and func-
tions:
Not used ;
On/off
– selected fan speed combination is activated. Function is on when contactor is on;
Button click – selected fan speed combination is activated. Function is activated when it receives an impulse. It is deactivated when it receives
the impulse again;
On/off
– Boost ventilation function is controlled. Function is on when contactor is on. If the boost ventilation function is not terminated by means of
this function within the boost ventilation time limit, force shutdown is used after the time expires;
Button click – Boost ventilation function is controlled. Function is activated when it receives an impulse. It is deactivated when it receives the
impulse again;
If the boost ventilation function is not terminated by means of this function within the boost ventilation time limit, force shutdown is used after the
time expires.
It is also indicated whether boost ventilation will be activated or combination of fan speeds is preferred, i.e. it is possible to indicate preferred supply
and extract air fan speeds individually.
19.17. HEAT EXCHANGER CONTROL
Cold - Heat Recuperation
Cold-heat recovery function is designed to control a heat exchanger. Its power is controlled by:
Using plate heat exchanger - bypass damper. When it is closed, the heat exchanger is operating at full capacity. Its power is reduced by opening
the damper.
Rotary heat exchanger power is controlled by changing its rotating speed or interval. When the rotor rotates at full speed, the heat exchanger is
used at full capacity. The power is reduced by slowing down the rotating speed or increasing the interval.
The heat exchanger can both heat and cool – it depends on air temperature. If it is colder outside than in the premises, the heat exchanger pre-
heats the outdoor air by using the room heat. If it is colder in the premises than outside, the heat exchanger cools down the outdoor air temperature
by room air. Its power is reduced to the minimum when the target supply air temperature is the same as outdoor one. The higher the difference
between the preferred and supply air temperatures, the higher heat exchanger power is used. When it is operating at maximum capacity, it is
allowed to activate other heating/cooling components.
For this function suitable heat exchanger type is indicated in the window
SERVICE › HEAT EXCHANGER
and PID controller coefficients – in the window
ADJUSTER
› PID CONTROLLERS ADJUSTING
.
PID controller output limits are set for rotor or bypass damper, at which their operation starts.
If rotor is controlled by 0..10 V signal, at low voltages it does not rotate, the motor heats up, thus the minimum control signal output is limited. If On/
Off rotary heat exchanger is used, PID percentage for activating the rotor is indicated in the window
SERVICE › HEAT EXCHANGER
.