While the GMR32B is primarily a phase-angle controller, patched firmware v2.4.1 unlocks burst-firing (cyclic ratio control) by setting register 40025 = 3. This reduces EMI and extends heater contactor life.
Original manuals swapped terminals 6 and 9. Follow the above. gmr32b+phase+controller+manual+patched
Explore the product specifications for the Smart series variant on While the GMR32B is primarily a phase-angle controller,