16GM 4700ACOPERATING MANUALVERSION 06/2014 ORDER NUMBER DOC23117304.2.3 PRODUCT HOSES4.2.2 GROUNDING THE DEVICEIn order to avoid electrostatic charging of the device, the device must be grounded.Friction, fl owing liquids, and air or electrostatic coating processes create charges. Flamesor sparks can form during discharge.Ensure that the device is grounded for every spraying operation.Ground the work pieces to be coated.Ensure that all persons inside the working area are grounded, e.g. that they are wearingstatic dissipative shoes.Wear static dissipative gloves when spraying. The grounding takes place via the spraygun handle.Ensure that the hose material is chemically resistant to the sprayed products and theused flushing agents.Ensure that the product hose is suitable for the pressure generated.Ensure that the following information can be seen on the high-pressure hose:- Manufacturer- Permissible operating pressure- Date of manufactureMake sure that the hoses are laid only in suitable places. Hoses should not be laid in thefollowing places under any circumstances:- In high-traffic areas- At sharp edges- On moving parts- On hot surfacesEnsure that the hoses are never run over by vehicles (e.g. fork lifts), or that the hoses arenever put under pressure from the outside in any other way.Ensure that the hoses are never kinked. Observe maximum bending radii.Make sure that the hoses are never used to pull or move the device.The electrical resistance of the product hose, measured at both valves, must be lessthan 1 megohm.Suction hoses may not be subjected to pressure.Several liquids have a high expansion coefficient. In some cases, their volume can rise withconsequent damage to tubes, fittings, etc. and cause fluid leakage.When the pump sucks liquid from a closed tank, ensure that air or a suitable gas canenter the tank. Thus a negative pressure is avoided. The vacuum could implode the tank(squeeze) and can cause it to break. The tank would leak and the liquid would flow out.The pressure created by the pump is a multiplication of the inlet air pressure.