G series
Condensing and modulating gas fired unit heaters
Electronic system and setting of the unit
Robur G Series gas fired unit heaters have been designed with an electronic system for the control and setting by microprocessor, in order to permit the regular functioning of the unit in any condition of use.
The electrical board checks constantly the functioning of the burner, the blower, the fans, monitoring the ambient temperature by the remote control, modulating perfectly the heating output and the ambient ventilation.
In a standard winter season the heater would remain mostly of the time in modulation mode, joining the best combustion efficiencies.
The electronic control permits to obtain not only a perfect regulation of the heating required, but also an adequate and constant combustion ratio with a minimum value of pollution in the environment.
The digital chronothermostat, supplied as standard with G condensing gas fired heaters, offers important control functions, resulting in a more precise and economical use of the installation.
With a simple connection via a shielded dual-conductor cable, it is possible to control the electronic circuit board of each gas unit heater to obtain the following functions:
• programmable timer for three separate temperature levels (comfort, reduced or freeze protection);
• winter operation in three selectable modes:
- automatic: the heater adjusts the heating output and air flow rate to suit indoor temperature;
- manual: the heater operates at one of 3 levels of heating output, which can be set manually;
- anti-frost: the heater prevents the indoor temperature from falling below the freeze protection level set;
• summer operation (ventilation only) with manual selection of ventilation speed;
• operational and fault diagnostics, with warning signals and alarm reset;
• set the functioning of the fan in modulating or fixed mode;
• check the functioning or the lock out of the unit.
In addition, if more than one heater is installed in the same indoor space, it is possible to centralize the operation of all h e a t e rs, thus keeping unchanged the functions provided by the supplied chronothermostat.
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