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Thermolec D21-TSSR Manual

Pcb color blue
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Safety features:
1- SSR+ output is short protected, short current 60mA max.
2- Low air-flow modulation/shut-off:
If the heater's air-flow sensor senses a temperature higher than
44°C (111°F) threshold, the output's pulse width will be reduced
from the actual down to zero (at approximately 51°C threshold),
proportionally by the sensor's temperature.
In this mode the yellow (or red) warning light is continuously
ON. (44°C-51°C D21-PS like). Accuracy: ±2°C (±4°F).
Shorted or broken Air-Flow sensor detection:
If the air-flow sensing Thermistor connection (A-A) of the D21-
PSSR controller is shorted, or open, the controller will continue to
work normally for about 60 seconds.
While in this 60 second counting, the yellow (or red) light begins to
quickly blink indicating this warning mode.
D21-TSSR
(PCB color blue)
(FW THF-1906 and newer)

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Summary of Contents for Thermolec D21-TSSR

  • Page 1 D21-TSSR (PCB color blue) (FW THF-1906 and newer) Safety features: 1- SSR+ output is short protected, short current 60mA max. 2- Low air-flow modulation/shut-off: If the heater's air-flow sensor senses a temperature higher than 44°C (111°F) threshold, the output's pulse width will be reduced from the actual down to zero (at approximately 51°C threshold),...
  • Page 2 If the normal air-flow condition is reinstated within that 60 seconds, the controller goes back to normal operation and the yellow (or red) light turns OFF. If the normal air-flow condition does NOT come back within the 60 second timeframe, the yellow (or red) Warning LED light begins to flash with a pattern of 1-second ON and 2-seconds OFF, and the controller switches off the SSR output (i.e.
  • Page 3 After 1 minute with Full ON, the controller turns OFF the elements and the yellow (or red) warning LED light flashes with a pattern of 1-second ON and 2-seconds OFF. 4. To put to normal operation: Remove the short, connect back the air-flow sensor and then turn controller's power off and on (to reset).