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When cleaning with pure H20, a distinction must be made between three aspects with regard to the prevailing outside temperature: The water unit, the environment and the employee. We will first look at the effects of frost on the water units.
You can find suitable mobile pure water systems in the form of RO systems or mixed bed resin here:
The basic rule for mixed-bed resins and osmosis systems is that they must not freeze. Similar to a forgotten drink in the freezer, there is otherwise a risk of immense damage.
Especially with membrane systems, freezing can quickly cause a total economic loss. Even if the systems are visually intact after a frost event, the housing may have small cracks or the internal parts (membranes, impellers of pumps, etc.) may have been damaged. In principle, the systems can be operated at sub-zero temperatures as long as they are not stored at sub-zero temperatures. The tap water flowing through the system (usually not much colder than 8 or 9 degrees even in winter) keeps the appliance free from frost. However, it is often not possible to use the appliance below 2-3 degrees outside temperature for other reasons (see below). In addition: When it comes to frost, it is often noted that machines must not be stored in cold storage. What is often forgotten, however, is transportation in the car. Frost damage can quickly occur during a long drive at sub-zero temperatures in a van or truck with an unheated loading area or if the appliance is left in the vehicle overnight. With regard to the surroundings or the surfaces to be cleaned, sub-zero temperatures (even with blue skies and sunshine) can of course also cause immense problems. Water can freeze on the windows and surfaces. Even more problematic are often dangerous "ice rinks" that can form on the surfaces to be cleaned or under or in front of them. Ultimately, working with running water is often almost impossible or unreasonable for employees below 3 degrees.
