With Thermostat, 480V, 4000W, Phases:3, 4.8 Amps. Engine Displacement: 800 – 1350CID, 13.1 – 22.1L HOTSTART’s WL heaters are the three phase option for dependable heating of original equipment manufacturers' engines. The WL series features the same pressure die-cast aluminum tank, built-in high limit thermostat and optional flow-through thermostat as our line of CB/CL heaters. The WL adds an all metal mounting bracket and heat power up to 5 kW, making it ideal for heavy-duty large engine applications. Technical Data