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Eberspacher Espar Hydronic S3 12v 5kW Water Heater Changeover Kit For upgrading the Hydronic D4WSC and D5WSC on a 12v Marine or Vehicle application. Replaces: 252219050000 - Hydronic D5WSC 12v252257050000 - Hydronic D4WSC 12v Genuine Guaranteed Eberspacher HS3 D5E 5.0kW water heater with water pump & fuel pump Automatic altitude adjustment up to 3000m with the Easy Start PRO controller 7-Day programmable timer with on-board fault code readout for easy diagnostics Diesel fired water heater with 5 kW heating power For cabin interior saloon heating and Engine pre-heating Also Domestic Hot water if coupled with a plate heat exchanger, hydroplate or calorifier Heater upgrade kit includes; Eberspacher Espar Hydronic S3 D5E CS (most desirable version) Water pump and fuel pump Easy Start Pro Controller with 7-day timing and altitude switching Heater wiring harness and electrical accessories Mounting bracket and fixing bolts Please note - this heater 'upgrade kit' includes necessary items to upgrade your heater from the previous models of Hydronic D4WSC D5WSC heater versions. This package does not include exhaust pipe, silencer, standpipe, fuel line or coolant hose. New Features Include; Stepless heating performance control.This allows for a more dynamic heat output, that modulates from 1.3kW up to 5kW depending on requirement. Making the HS3 more fuel efficient than previous Hydronic models. More Power for Size.Retaining the usual Hydronic 5 power output the Hydronic S3 still has 5kW of heating to hand although its dimensions are smaller at 215 x 91 x 144 mm. Noise levels optimised.The new HS3 Vehicle Kit also includes the new, almost silent Eberspacher digital fuel dosing pump. No more “ticking” sounds! Not only have Eberspacher developed a silent running fuel pump, the Hydronic S3 also includes a newly developed vehicle exhaust silencer and combustion air silencer to quieten down the exhaust and combustion air noise. Low maintenance.The Hydronic S3 Economy has a service life of 3000 hours. That’s just over 8 hours a day for 365 days of the year! OBD On-board diagnostics.Fault display via the Easy Start PRO. The Hydronic S3 coupled with an Easy Start PRO will give a text-based fault description, reducing confusion and saving time diagnosing the issue. Automatic Altitude AdjustmentAltitude adjustment will be automatically handled by the HS3 up to 1500m above sea level; altitude adjustment can be activated manually above 1500m with the EasyStart PRO (see images)