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VERSION 03/2018
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.
Automatic spray gun
The coating product under high voltage is sprayed on the automatic spray gun. The energy
on the spray gun can be >350mJ. Personal injury cannot be ruled out with the level of
energy. Access to the spray gun must be prevented. Access to the spray gun can only be
approved after the entire system has been grounded.
If the high voltage is switched off (e.g., during coating intervals), the system discharges
slowly using a leakage resistance of 7.5 GOhm. This process can take more than 10 seconds
depending on the design of the system. The system is intentionally not abruptly discharged
when switched off the high voltage, so that the high voltage does not have to power up
from zero again at very short interruptions.
Access to the spray gun may only be enabled if the mains supply on the AquaCoat control
unit is switched off. This ensures the system is completely earthed.
WARNING
Electrical discharges!
Danger due to electrically charged product in the spray gun.
Access to the spray gun must be prevented.
As long as the mains supply on the AquaCoat control unit is switched on, access to
the spray gun must be prevented.
ORDER NUMBER DOC 2369735
25
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