this SPDT air switch is designed to sense positive

Industrial Durability: Features an ambient temperature rating up to 175°F

Compressor Protection: Actively prevents refrigerant dilution of the oil

As a direct 3100A-15Q14 replacement

offering an automatic reset that closes the circuit once the temperature drops to 180°F

Schneider Electric (Erie) VS3427G14A020 Valve Assembly Els PW 17895 this SPDT air switch isThe Schneider Electric Erie VS3427G14A020 Valve Assembly is a heavy duty, 3 way zone valve engineered for high demand hydronic and low pressure steam applications. Rated for 15 PSI steam and fluid temperatures up to 250F, this assembly utilizes a 24Vac spring return actuator (AG14A020) to ensure a reliable fail safe position during power loss. With a high flow capacity of 8. 0 Cv and 1" NPT threaded connections, it provides the low pressure drop