ACV Mechanical thermostat A1002099

The ACV A1002099 is a mechanical thermostat with a temperature setting range of 0 to 80 °C. It is supplied with a 1500 mm capillary and a 6 mm bulb. This thermostat is used in advanced ACV boilers, enabling accurate temperature setting and improved performance. It is compatible with ACV HeatMaster 100 and HeatMaster 120 models.

Parts of this type are selected by matching the temperature range, capillary length, and bulb diameter to the original equipment. The bulb must fit the immersion pocket or clamp, and the capillary should be routed without sharp bends. The switching action (normally open or closed) and reset type (automatic or manual) must be verified from the original part before ordering.

Common failure modes for such thermostats include loss of capillary charge, which causes drift or failure to switch, mechanical wear of the switching element, or poor thermal contact between the bulb and the pipe or well. When these failures occur, the equipment may not regulate temperature correctly or may fail to switch at the set point. Check the bulb insertion and capillary routing, and verify the thermostat's switching action if the system behaves erratically.