Genuine OEM Lochinvar PRS2004 Low Gas Pressure Switch (100208389)

This is a Genuine OEM Lochinvar Low Gas Pressure Switch used in natural gas EnergyRite (model ERN/ERL) pool & spa heaters, which acts as a safety monitor rated at 4.1 in WC (Water Column) to prevent burner ignition if natural gas supply pressure drops below safe operational limits. It constantly measures the incoming natural gas pressure entering the appliance’s gas valve, if the gas pressure drops below 4.1 in. WC, the internal switch opens its electrical contacts. This instantly breaks the safety circuit and triggers a safety lockout, preventing the burner from firing.

• p/n: PRS2004, PRS2004K, 100166133, 100208389, 100208389K
• Pressure Set Point: Fixed at 4.1 inches Water Column (in. WC)
• Gas Compatibility: Engineered strictly for Natural Gas (NAT) applications.
• Switch Contact Configuration: Standard SPST (Single Pole Single Throw) or SPDT (Single Pole Double Throw) electrical feedback loop
• Control Circuit Voltage: Operates within standard 24 VAC (low voltage) or 120 VAC (line voltage) safety monitoring loops
  • Maximum Rating: The mechanical contacts are rated for up to 240 VAC / 250 VAC max
• Current Capacity: Rated for 5 Amps to 10 Amps (resistive) max, depending on exact terminal type