GrantS Posted July 4, 2012 Share Posted July 4, 2012 Hi all, Back in July 2011, I posted a question regarding connecting the Calorifier to my Cumminns Mercruiser Diesel Engine (Isuzu 1.7 TD) which was originally connected to the 4.3L petrol lump that used to be in there. Antares suggested, that it may need a ciculation pump inline with it. Well, i have recently done this, but due to the way this has to be connected, the Calorifier connection is in parallel with the heat exchanger and therfore does not have a direct flow from the circulation pump that is fitted to the engine. So, it looks like it will need a pump. (Antares, well spotted) There are quite a few to choose from and all have various flow rates and vary from around Â£26 for a cheap chinese import to well over Â£100 for a very good quality one. I have been doing some digging on the net and have found something that might do the job very well. Although i shall be speaking to the company, to see what they have to say about using it for this type of installation. From what i have read on the net, this type of pump is a copy of the pump that is used in the higher performance versions of the Lotus elises and exiges as a coolant re circulation pump. Lotus apparently used a Bosch PAA EWP pump, but the Davies Craig EBP pump operates at the same spec, apart from the fact that the Bosch is 20 L/pm & the Davies Craig is 13 L/pm. At the end of the day, i only want to circulate the water / antifreeze mix through the coil in the tank and don't want to be doing this too quickly, so this may do the trick. The could also be fitted on the return line, as the water temperature will lower there. (Although the spec says up to 120 deg C) There is also a plus side to having a circulation pump in line, in that i could thermostatically control the pump, so that it doesn't circulate the water through the Calorifier until the engine has reached its normal working temperature, thus preventing a slow warm up of the engine from cold. Just out of interest, has anybody else had to fit a pump configuration like this, as i have seen installations on the net that have to different marinised diesel engines and wondered what results people have had and what problems they have encountered. Many thanks Quote Link to comment Share on other sites More sharing options...
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