DISPOSITIVO DESTINADO AO CONTROLO DE UM APARELHO DE AQUECIMENTO

摘要

The device monitors the volume flow of combustion air blown through a heating system by a fan (24) and/or that of the exhaust gas. A difference pressure is measured between at least two measurement points (32',34') in a combustion air delivery line or in an exhaust gas line (26) to determine the volume flow and a choke (44) is mounted in the feed or exhaust line. The choke is positioned to increase the pressure difference between the measurement points. The choke and the measurement transducers at the two measurement points are arranged essentially adjacent to each other in the combustion air feed line or exhaust line.