Carrier 08-2253-00 Contactor 318423-701 What is the difference between

What is the difference between an "A" insert and an "S" insert

Once the material is compressed and heat-cycled

For field configuration

and 100170554 across all compatible FTXL and Aquas series boilers

Carrier 08-2253-00 Contactor 318423-701 What is the difference betweenThe Carrier 08 2253 00 Contactor is a heavy duty, industrial grade electrical switch specifically engineered for high demand commercial HVAC applications. Built for precision and reliability, this 2 pole 40 amp contactor facilitates the safe starting and stopping of electrical loads in larger air conditioning systems, heat pumps, and chillers. Featuring a robust 480V coil, it is rated for 440 480 VAC operation (also compatible with 380 415V), making