Case and switchboard duct electric air heater is made of galvanised steel. Heating elements are made of stainless steel.
The heater is equipped with a two-stage overheating protection. The first stage sensor (with automatic reset) is activated when the air temperature on the heater body reaches 60°C.
The second stage sensor (with manual reset) is activated when the air temperature on the heater body reaches 90°C. In case the ventilation system, which includes an electric air heater, is manually regulated, when switching off the system it is necessary to switch off the air heater first, and after complete cooling of the heater-fan.
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