The frost unit QAF81... for air-side monitoring of the temperature of LTHW heating coils in ventilation and air conditioning systems is used to prevent frost damage. It has a small switching differential and good repeatability. The reset occurs automatically (manual reset required with QAF81.6M).
QAF81 Features:
Setpoint adjustment range:-5...+15 °C (23...59 °F)
Factory setting 5 °C (41 °F)
Responsive length of sensor Approx. 0.3 m
Type of switch Single pole change-over
Typ reference Reset Capillary length
QAF81.3 automatic reset 3 m
QAF81.6 automatic reset 6 m
QAF81.6M with lock-out and manual reset 6 m
