This operator is designed specifically for the RA 2000 series (RA connection)

Can I use a standard 24V relay to replace the P91000

this air vent is designed to function in hydronic systems utilizing standard antifreeze concentrations

Can this be used on a 120V or 208V primary circuit

Johnson Controls P72DA-1 Pressure Control Freon This operator is designed specificallyTwo Pole High Pressure Control, DPST, Open High Close Low, 50 Psi to 450 Psi, Lockout ( Requires Manual Reset ) Differential, 36" Capillary with 1 4" Flare Nut, 525 Psi Max Bellows Overpressure, Includes Universal Mounting Bracket, "All Range" for R 12, R 22, R 134A, R 500 and R 502