Demrad Aden HKB 120 Air Pressure Switch D003200032 - 85/70
Product Classification: Compatible
The pressure switch (differential pressure switch) is a safety element in the boiler. Its main purpose is to control the removal of combustion products. If the chimney is clogged or the fan is faulty, the pressure switch will not close the contacts and the boiler will not start, this will prevent the possibility of carbon monoxide poisoning. Pressure switch has an operating range of 85/70 Pa