Robertshaw 780-502 DSI Module Freon Common Questions: Is the 621931R

Common Questions: Is the 621931R a direct replacement for the 621931

Does this unit support DC control signals

specifically designed for Model 2003 steam humidifiers

this 40VA-rated model provides a stable secondary output of 24VAC

making it a staple for contractors managing residential and light commercial HVAC systems

Robertshaw 780-502 DSI Module Freon Common Questions: Is the 621931RThe Robertshaw 780 502 is a Universal Direct Spark Ignition (DSI) control module designed for single rod or dual rod sensing applications in natural and LP gas systems. This gas ignition control operates on 24V AC and provides a 4 second Trial For Ignition (TFI) with a single try lockout sequence. As a versatile non prepurge ignition module, it replaces hundreds of legacy Robertshaw and competitive models, including the DS845 and SP715 series. The