In a standard high-pressure safety circuit

and Arcoaire systems without bracket modifications

If your diagnostic code indicates a pressure switch failure or draft issue

You must stick to the 170-20F specifications

the "C" suffix typically denotes a commercial packaging variation but offers the same 160-220 psig range

Johnson Controls VG7842GS Valve 321894-708 In a standard high-pressure safetyThe Johnson Controls VG7842GS is a professional grade 1 2" 3 way globe mixing valve engineered for precise fluid modulation in high demand HVAC and hydronic systems. Built with a rugged cast bronze body and brass trim, this VG7000 Series mixing valve provides superior control for hot water, chilled water, and 50 50 glycol solutions. With a 4. 6 Cv flow coefficient and a linear flow characteristic, it ensures stable temperature regulation across its