245 Frost Protection Drinkers Heated 24 V drinking bowls – how do they work? Heating drinking water using drinking bowls is so easy! You only need at least one heatable water bowl, a temperature switch and a transformer (as 24-volt operation). Which transformer for how many bowls? Simple! If you only want to use one drinking bowl with 80 W of power, a 100 VA transformer will suffice. If you also want to connect a 24 V heating cable, simply add the power consumption (= wattage) of the cable and this gives you the minimum power required for the transformer. Do not measure the transformer’s power too precisely, so you will have a buffer for extensions. Connection diagram 1. Mains connection 230 V, separately fused 2. Water connection, spur line or circulation system possible 3. Frost protection temperature switch 230 V, (222794) 4. Junction box, protection class at least IP54 5. Transformer 230 V AC => 24 V AC, 100 W (222796), 200 W (222797), 300 W (222626), 400 W (222798) 6. Junction box, protection class at least IP54 7. 24 V supply cable for further heated drinking bowls or heating cables 8. 24 V supply cable for connecting to the drinking bowl 9. 24 V frost-protection heating line (22358, 223581) (if not connected to a circulating heat system) 10. Protective plate for the bite area (221975) 11. Pipe insulation 12. Heated drinking bowl (e.g. 222010) 230 V 24 V Bite area 24 V When choosing a transformer, ensure that you factor in the power loss caused by the supply cables. You will find a sample calculation and a table containing power loss values in this catalogue.
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