By utilizing genuine OEM Trane parts

one outlet) rather than a diverting setup to maintain operational integrity

connect the sample line to the "H" (1/4") port

The 21642 is the primary HSG 400 replacement part and is also utilized in Blue Angel and Blue Angel Plus gas conversion burners

this genuine Johnson Controls part is the standard for commercial HVAC pneumatic controls requiring dual setpoint adjustment visibility

Honeywell RP418A1065 Relay Els PW 17895 By utilizing genuine OEM TraneThe Honeywell RP418A1065 is a heavy duty electric pneumatic relay designed to seamlessly bridge high voltage electrical circuits with pneumatic control systems. Operating at 480V 440V (50 60 Hz), this surface mounted solenoid valve is engineered for demanding industrial environments where reliable interlocking is mandatory. It functions as a versatile diverting relay, selector relay, or stop and bleed valve, providing contractors with multiple