Title: Manual - Varmemåler Hydrocal M3 - På rør.PDF
34VOLUME METERS C1/C2IN CONNECTIONThe inputs C1 IN (51, 52, 53) and C2 IN (54, 55, 56) are dedicated to the flowmeters for hot and cold sanitary water.The heat meter is compatible with flowmeters with pulse output OC (open collector) or OA (reed), with pulse value “liters/pulse” (strictly compliant to the value set on the meter).Terminals 53 and 56 are reserved for eventual Anti-tampering wire connection.Warning: when using flow meters with Open-Collector (OC) output, it is necessary to follow the correct connection polarity.FUNCTIONALITYThe heat meter HYDROCAL M3 is equipped with dedicated sections for the thermal energy measurement of a heating/cooling (on request) system and for the volume measurement of the hot/cold sanitary water system.The meter is suitable for two-pipe domestic systems, in boiler room installations or any other compatible application.