Operation and Maintenance Documentation of GUARD PRO air curtains v201708
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9. OPERATION AND MAINTENANCE
The engine and fan used in the GUARD PRO air curtains are maintenance-free devices but regular check-ups are advised,
especially motor and bearing (fan’s rotor should rotate freely, free from any axial and radial throws/run-outs and undesired
knocks/rattles.
The heat exchanger requires systematical cleaning all dirts /impurities off. Before the start of the heating period, the heat
exchanger is advised to be cleaned with compressed air directed to the air outlets; there is no need for dismantling the device.
Pay special attention when cleaning the exchanger’s fin due to high possibility of damaging them. If the fin is bent, use a special
tool. If the device has not been used for a longer period of time, unplug it before the next use.
The heat exchanger is not equipped with any anti-freeze protection device. The heat exchanger may be damaged if the room
temperature goes below 0°C.
If the device is to operate in a room where the temperature goes below 0°C, anti-freeze liquid must be added to the water
circulation/system. Anti-freeze liquid must be appropriate for the material the exchanger is made of (copper), as well as other
elements of the hydraulic system/circulation. The liquid must be diluted with water accordingly to the manufacturer’s
recommendation.
NOTICE !
!
Any and all repair and maintenance works must be conducted with the power off and the heat input
disconnected.
!
Only suitably qualified staff well acquainted with the safety regulations concerning handling with an electrical
device must be employed when the device is being installed, started and operated
!
In the event of coolant leak, when the water system is under pressure, any repairs of the leakage are strictly
prohibited.
!
Any repairs of the device must be conducted only if the device is disconnected from the power supply.
!
If the device being operated gives metallic clatter, vibration or the level of noise is increasing, check if the
mounting of the fan has not become loose – in case of any problems contact the installer of the device or the
SONNIGER Authorized Service immediately.
