Dwyer Instruments 1900-5MR Pressure Switch 319848-301 the Carrier HK680025 is the

the Carrier HK680025 is the direct engineering update for the HK42FZ029

Ensure the ground wire is secured to the burner chassis and that the flame rectification signal meets the minimum microamp requirement specified by Utica-Dunkirk

You should verify the dimensions (11x10) and the 1/2" shaft size on your existing assembly to ensure a proper fit

6 Cv linear flow design allows for fine-tuned temperature control in terminal unit applications

With a 1/4-inch barbed hose connection and a maximum control pressure rating of 25 psi

Dwyer Instruments 1900-5MR Pressure Switch 319848-301 the Carrier HK680025 is theThe Dwyer Instruments 1900 5MR Pressure Switch is a trade reliable solution for technicians requiring precise monitoring in HVAC, refrigeration, and air handling systems. This compact low differential pressure switch is specifically engineered to handle air and non combustible gases with a setpoint range of 1. 4" w. c. to 5. 5" w. c.. The "MR" designation signifies a manual reset pressure switch, an essential safety feature for critical alarm circuits