clean the Q347A ignition electrode and check for proper gas pressure

Check for 24V at the coil

Smith boilers

Is this relay compatible with 120V or 240V blower motors

Johnson Controls P70MA-2 Pressure Control Els PW 17895 clean the Q347A ignition electrodeThe Johnson Controls P70MA 2 Pressure Control is a heavy duty dual pressure switch engineered specifically for ammonia refrigeration systems (R 717). This SPST switching control integrates both high and low side protection into a single, ruggedized all steel enclosure, meeting the demands of commercial and industrial ammonia plants. The low pressure side features a wide adjustment range from 20" Wc to 100 psi with a tunable 7 psi to 50 psi