The controllers STFW/VFG(S) 2 and STFW/AFT/VFG 2 are used for temperaturecontrol and temperature monitoring of drinking water and heating systems.• Type-tested acc. to EN 14597-2015• District heating systems acc. to DIN 4747• Heating systems acc. to DIN 4751 and DIN 4752• Water heating systems for drinking and industrial waters acc. to DIN 4753
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