The D21-TSSR electronic controller has been designed to be a compact solution that takes full advantage of our patented Air-Flow Sensor which modulates the heater’s capacity according to the quantity of air flowing through the heater by responding to the radiant heat of the elements even at very low CFMs. With normal airflow the controller will operate at full power. When the airflow drops below the minimum airflow, the controller will still operate but at reduced power. It will also safely shut down the heater in case of a total loss of airflow. The ‘T’ versions of controllers such as D21-T, D22-T, D21-TS and D21-TSSR are controlled by a thermistor type thermostat such as our RT (room thermostat) and DT (duct thermostat) as well as our integrated Duct Sensor.
Pilot lights are mounted on the control box to indicate that either a function of the heater is operating or a failure condition is present. The most commonly specified pilot lights functions are: power on, heating on, no airflow, overheating, stages on. The pilot lights' functio...Learn More
It offers additional protection against overheating. It is standard on heaters of 30 KW and less and not in excess of 300 volts, and optional on all others. This switch must be manually reset to make the heater operational.Learn More
AcuSteam High Limit cutoff Thermolec’s exclusive ACE SENSOR monitors the conditions in the duct to prevent excessive buildup of humidity. It is included with every AcuSteam Pro and may be used with the residential AcuSteam as an option. The high limit cutoff is adjustable from 8...Learn More
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