1. Product identification
Immersion heaters are designed for heating baths and liquids used in industrial pre-treatment and surface treatment of metals and alloys. Depending on the chemical composition of the bath, it is necessary to choose the material of the protective well, coating and surface. Immersion heaters and heating elements may be immersed up to maximum 5 cm below the heater holder and at least to the immersion mark marked on the heater.

2. Description
Optimer – classic immersion heaters of the tubular type with a ceramic heating insert in a protective well. Fleximer – shaped immersion heaters based on tubular heating elements with a protective coating or surface – for floor and wall use. Stimer – special immersion heaters based on tubular heating elements in a protective well or with a protective coating or surface. The floor and wall versions contain a ceramic heating element in protective wells. Polaris – a modern immersion heater consisting of a coiled heating cable in a Teflon casing for universal use. The heaters are modular, the heating inserts, holders and well heads are replaceable. The well heads, including heads with thermoregulation, are IP 65. Standard versions include a 7m cable H07RN-F 4G1.5 or CYSY 4Bx4. For custom-made versions, a cable is supplied according to the customer's requirements and the environment. Polaris heaters and thermoregulation have separate operating and maintenance instructions.

3. Technical parameters
The main technical parameters are listed in the table for individual types of heaters. Custom-made parameters are based on customer requirements. The temperature range of the heaters is based on the requirements of the baths and liquids, the supply voltage is 230V. or 3x400V (AC) at a frequency of 50 Hz.

4. Assembly and installation of heaters
Before installation, check that the heater or heating element, protective well or protective coating or surface or electric cable have not been damaged during transport or handling. Installation, connection and replacement of the heating element or spare part of the heater may only be carried out by a worker with the appropriate qualifications according to Decree 50/78 Coll. The connection must comply with the valid safety regulations for the given electrical equipment in an industrial environment. Heaters without a structure (with a well or heater holder) must be installed vertically, the active part should be at least 20mm from the wall of the new tank or bottom, in older baths and tanks at least 50-70mm from the bottom (sludge, condensation, residues). Otherwise, the heating element may overheat or be damaged. When electrically heating baths, a level monitor must always be installed; a significant decrease in the level may damage the heater and even cause a fire. When installing heaters, we must ensure that they are located separately from any sources of electrical current and also from other moving parts in the bath.

5. Heater operation and maintenance
The heater may only be operated by a trained operator. The heater must not be manipulated when switched on. Keep the bath level between the max. and min. level marks, perform a visual inspection of the surface of a functional heater. Regularly check whether there is any damage to the heater or heating element, cracks in the protective well or heater in the case of glass, porcelain or Teflon heaters, or corrosion in the case of metal heaters. If the heating element is damaged, it must be replaced with a new one, including the power supply. The heads of the protective well or other replaceable parts can also be replaced. Always clean the surface of the heater when the power is disconnected and after the protective well or surface has cooled down and after removing it from the bath. Clean the heater in protective gloves using a fine brush or a brush with bristles resistant to the bath environment. When cleaning, observe the safety precautions for this type of activity and use appropriate protective equipment.

6. Storage
Heaters must be stored in a dry environment. The maximum relative humidity in the storage room can reach 50%. During longer storage or longer shutdown of heaters, it is necessary to verify the electrical condition of the heating parts of the heaters. If the result does not comply with the requirements, it is necessary to dry the heating parts of the heaters with an external heat source at a temperature of 150-180°C for at least 5 hours, or until the required electrical parameters are achieved. If one or more heating branches or heater parts are damaged it is necessary to replace the entire heater. Before dismantling, the heater must be disconnected from the power source.

7. Technical data
The tolerance of the nominal power input is in accordance with EN 60335-1 in the range of +5/-10%. The heater is marked on the heating branch and the holder. It contains the mark of the manufacturing company (BA CZ, ELTOP), type designation, nominal voltage, power input, serial number and the mark of conformity with valid CE regulations. The heaters are manufactured in such a way that their properties do not change even after prolonged use. The manufacturer reserves the right to make changes that do not affect the function and use. Substantial changes are agreed with the customer. The heater meets the requirements of EN 60335-1.