This 3-position switch is suitable for liquid heater AUTOTERM 30SP-24
Switch position functions:
Off - position
Heating process is stopped.
On - position
Heater start heating coolant till coolant temperature reaches 82° C / 179.6° F, then heater goes into “cooling” mode, combustion process is stopped, pump continues operating to ensure liquid coolant circulation in vehicle cabin
heating system. If liquid coolant temperature drops under 72° С / 161.6° F, heater starts heating cycle again.
Circulation - position
Water pump circulates liquid coolant without heating process.
This function is also used to bleed out air from coolant system.
This switch is included in AUTOTERM 30SP-24 standard installation kit.