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Smarty 4X V
www.salda.lt
In the section ADJUSTER › USER SETTINGS › ABOUT you may see software and configuration versions that are saved in the production line namely
to every unit. Next to them the running time since the unit has been manufactured is also displayed. It is calculated when the fans are rotating.
Air-flows are adjusted in the adjuster environment window ADJUSTER › AIR FLOWS ADJUSTING. There are 4 of them in the system and they are
dedicated to specific mode:
› Building protection;
› Economy;
› Comfort;
› Maximum power (BOOST function).
Air-flows are arranged in an ascending order, i.e. upon setting lower air-flow in COMFORT mode than in ECONOMY mode, the air-flow of the latter
is reduced automatically. With respect to the system configuration, airflows are indicated in percentage, pressure or amounts of air. 100 % value of
air-flow is indicated in service environment window SERVICE › FANS › FAN SPEED CONTROL.
In the adjuster environment window ADJUSTER › PID CONTROLLERS ADJUSTING the coefficients of the existing PID controllers are adjusted. The
amount depends on the system configuration. If the system operation for any reasons is unstable (fluctuating), PID coefficients may be adjusted. It
is recommended that a specialist did this.
This function manually activates/deactivates the components controlled by digital and analogue outputs. The latter ones are controlled in percentage,
and digital ones – by ON/OFF. Based on manufacturer’s parameters (by default) the status of all components is AUTO, which means that control is
based on air handling unit operating algorithm. Components are displayed by the system configuration. Settings must be saved so they remain active
after power loss.
The lowest power consumption is when the Stand-by mode is on, and position of components – AUTO.
Prior to using the manual control function, it is recommended to activate the force shutdown function, which blocks the air handling unit operating
algorithm.
This can be useful, if you need to check whether everything is properly connected. Moreover, in the event of failure, certain components can be acti
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vated so that the unit operates irrespective of sensors and protections. Of course, this method should be applied in exceptional cases until the failure
is rectified.
If the service environment window SERVICE › SENSORS displays an external (REMOTE) type of a temperature sensor, its temperature may be indi
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cated manually. The values may be indicated via the Modbus interface.
The service and adjuster environment have the window MONITORING where you can monitor operation of the entire system, i.e. see controller input
and output, CO
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values, versions of connected modules, date and time, speed of fans, temperatures, pressure, etc. The amount of information de
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pends on the system configuration. This tool is designed for preventive maintenance of the system.
This function is designed to protect the system against the impermissible unit shutdown and it is recommended to limit the unit shutdown up to 1 hour
within 12 hours during the winter season. Possible function modes:
› Always allow shutdown;
› Block shutdown;
› Block shutdown in winter;
› Block shutdown in summer.
It must be indicated for how long the shutdown is permissible within 12 hours. If it is blocked and the system is shut down, the system counts and
informs the user on the remaining time. This function is configured in the service environment (SERVICE › MAIN › SYSTEM BLOCKING).
If the time has expired and Stand-by mode is blocked, the user is informed by the function indication.
Temperature for supply air or premises temperature may be indicated. In the service environment section SERVICE › MAIN › SUPPLY AIR TEMPERA
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TURE CONTROL you can control it based on supply or exhaust air temperature. If control by premises temperature is selected, then it is calculated
what kind of air is to be supplied so that the proper room temperature is maintained. It is limited by allowable limits of supply air temperature.
The air handling unit is not designed to heat premises, therefore it is not necessary to use full capacity for low temperature differences – the compen
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sation in percentage is provided for this purpose. This parameter indicates a percentage of the temperature difference (between the set temperature
and premises temperature) to be compensated by this function. E.g. set point is 20 °C, temperature in the premises is 16 °C, compensation is 50 %,
difference between the indicated and existing temperatures is 20-16=4 °C. Since 50 % is compensated, then 4*50 %=2 °C. When the received value
is added to the set temperature we get the required supply air temperature – 2+20=22 °C. This temperature is not limited as it is within the supply air
temperature protection limits. In this case the system maintains the supply air temperature at 22 °C.
The closer the premises temperature is to the set temperature (20 °C), the faster the supply air temperature reaches 20 °C.
It may be too hot in the premises, therefore this function both heats and cools. Preferred (compensated) temperature is displayed in the window MONI
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TORING (REQUIRED SUPPLY). If the displayed temperature is 0 °C, it means that temperature maintaining of supply air is switched off.
The temperature of supply air is maintained by the following components (indicated in a sequential order):
› Fans (operate slower, if it is too hot);
› Recirculation valve (if the ambient air temperature is favourable);
› Water cooler;
› DX cooler;
› Recirculation damper and CO2 (in case of favorable outdoor temperature);
› Bypass damper or rotor (in case of favorable outdoor temperature);