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VERSION 02/2018
ORDER NUMBER DOC 2366717
OPERATING MANUAL
AquaCoat cabinet
To achieve an optimal application efficiency, the lacquer supply (lacquer tank and pump)
is brought to high-voltage potential in an insulated cabinet. The interior of the cabinet,
connected to high voltage, is protected by double (redundant) safety elements before
touching. Before the cabinet door can be opened, the system is grounded abruptly by
pneumatic grounding switch. A direct discharge of the system to the user is not possible
in the area of lacquer supply system. However, the plastic surface of the cabinet can
charge, which results in small discharges (brush discharges) when touching the cabinet.
These discharges are perceptible but harmless and they are completely non-hazardous for
human health.
Product hose
The product hose directs the coating product, which is under high voltage, to the spray
gun. The product hose is designed on one hand high voltage resistant and on the other
hand, there is the outer shell of the product hose from a conductive, grounded plastic
sheath. Even of an electrical breakdown of the product hose, there is no danger to the user,
since the current would flow through the grounded sheath.
Manual spray gun
The coating product under high voltage is sprayed on the manual spray gun. If you touch
during coating the nozzle area, it results in a system discharge to the grounded user. Such
a discharge is weaker, because of the dampening effect of the product hose as a discharge
during lacquer supply and according to standard EN 50059 the discharge must not exceed
a maximum energy of 350 mJ. Such a discharge can still be fierce and painful, but it is not
hazardous to health. Soon as the coating process is interrupted and the trigger is released,
the system will be discharged slowly via a discharge resistor of 3 Gohm. This process can
take up to 20 seconds, which means that during this period the nozzle area of the spray
gun should not be touched. The system is intentionally not abruptly discharged, so that
the high voltage does not have to power up from zero again at very short coating intervals.
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