Working With Pressure Washers - Siemens SIMATIC TP700 Comfort INOX PCT Operating Instructions Manual

Maintenance and repairs

4.2 Working with pressure washers

Cleaning interval for cross contamination
If there is a chance that operation may result in cross contamination (e.g. hand contact with
product), you should proceed as follows:
• Remove visible buildup immediately.
• Avoid direct contact of the food with the grouting compound.
• Prevent food adhering to or contacting the grouting compound from returning to the
production process.
4.2 Working with pressure washers
The HMI device can be used on machines that are cleaned with pressure washers.
NOTICE
Damage caused by steam cleaners
Hot steam can damage the HMI device. Do not clean the HMI device with steam cleaners.
Risk of contamination by pressure washer
When pressure washers are used, areas that have already been cleaned can be
contaminated again:
• Due to particles of dirt or aerosols swirling up
• Due to draining wastewater
This is why high-pressure cleaners are generally not recommended for machine and plant
cleaning in the hygiene sector.
Cleaning guidelines
If possible, do not clean the HMI device directly and repeatedly with a pressure washer.
• Use only clean water.
• Cover sensitive areas beforehand.
When cleaning with a pressure washer, you need to ensure that you can manually regulate
the pressure. The pressure washer must be set in such a way that it prevents any damage to
the HMI device.
• Avoid pressures > 100 bar
• Avoid temperatures > 80°C
• Use only nozzles suitable for the device and the objects to be cleaned, for example, the
machine, container or floor and that are suitable for this purpose.
A fan nozzle is suitable for the machine, for example, a spot jet nozzle is unsuitable. Refer
to the manufacturer's documentation.
• If necessary, use a flat jet nozzle and keep a distance of at least 30 cm.
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Compact Operating Instructions, 07/2021, A5E38804191-AE
Comfort Panels INOX PCT