23
Smarty 4X V
www.salda.lt
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 configured
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.
In the service environment section SERVICE › MAIN › PASSWORD › PASSWORD CHANGING MODE › ON you can change login passwords. For
this it is necessary to activate the change and after entering a preferred password (4 digits), click a button SET. To review and change the parameters
without a password, just set 0.
If set parameters result in incorrect operation of the system, you can always restore the factory defaults in the service environment window SERVICE
› MAIN › FACTORY SETTINGS.
› Shut down the system;
› Run the supplied air fan at full speed and shut down the exhausted air fan;
› Run the exhausted air fan at full speed and shut down the supplied air fan;
› Run the supplied and exhausted air fan at full speed.
The preferred air-flow can be indicated in percentage or in 4 fixed speeds where each of them is dedicated to a relevant system mode:
› Building protection;
› Economy;
› Comfort;
› Maximum power.
Fan speed can be controlled by:
› Percentage - speed in percentage is indicated in the adjuster environment window ADJUSTER › AIR FLOWS ADJUSTING: 0 % corresponds to
0, and 100 % – 10 V control signal voltage;
› Pressure - the maximum system pressure is indicated, which based on speed settings in the adjuster environment ADJUSTER › AIR FLOWS
ADJUSTING means 100 % air-flow;
› Air-flow (m
3
/h) - K factors of supply and exhaust air and the maximum system air-flow (m
3
/h) are displayed, which based on speed settings in the
adjuster environment ADJUSTER › AIR FLOWS ADJUSTING means 100 %.
Fans based on air-flow and pressure are controlled by PID controller and its coefficients are indicated in the adjuster environment section ADJUSTER
› PID CONTROLLERS ADJUSTING › FANS SPEED CONTROL BY AIR FLOW OR PRESSURE. Every 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.
The following can be connected to the system:
› Supply/exhaust air dampers (On/Off, 3P or Open/Close type). They are opened prior to starting the fans and closed after their shutdown;
› Recirculation dampers that are used for heat exchanger frost protection, maintaining of temperature and full recirculation function;
› Fire dampers with one or two limit switches. They are controlled in the same way as supply/exhaust dampers, except for cases when testing
function is active or fire protection is activated.
If On/Off, 3P or Open/Close type damper is indicated, proper opening time must be indicated. On/Off type damper control:
› When it is necessary to open, OPEN signal is activated;
› It is necessary to wait until it opens and fans are started;
› OPEN signal is activated during the entire operation time;
› When shutting down the system, it is necessary to wait for 10 s, until the fans stop rotating and switch off the OPEN signal.
3P type damper control:
› When it is necessary to open, OPEN signal is activated;
› Waiting until it opens, OPEN signal is switched off and fans are started;
› OPEN and CLOSE signals are switched off during the entire operation time;
› When shutting down the system, it is necessary to wait for 10 s, until the fans stop rotating and activate the CLOSE signal for an indicated time
period.
Open/Close type damper control:
› When it is necessary to open, OPEN and CLOSE signals are activated;
› It is necessary to wait until it opens and fans are started;
› OPEN and CLOSE signals are activated during the entire operation time;
› When shutting down the system, it is necessary to wait for 10 s, until the fans stop rotating and switch off the OPEN signal (CLOSE remains
active) for an indicated time period.
