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

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

automatically resetting once the temperature drops back to 120

Contractor Grade Durability: Equipped with a non-spring return (NSR) mechanism and a reinforced drive train for stable performance in high-cycle hydronic applications

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

Johnson Controls P72DA-1 Pressure Control Freon Can I use a standardTwo 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