| Application range | - To keep the water in the drinking shell free from frost
- With two auxiliary heaters, also suitable for double drinking shell
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| Consists of | - Heater
- Cover
- Supplied without transformer
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| Technical info | - For model 500: auxiliary heater model 523 (stock no. 131.0523) 24 V, 80 W
- For model 520: auxiliary heater model 524 (stock no. 131.0524) with a heating coil 24 V, 80 W
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