the raw water cooled engine can be modified to use coolant in the engine and an external exchanger. Mine is setup that way from the factory (at least looks that way).
Leslie. Phoenix C&C32 -------------------------------------------- On Wed, 12/3/14, Graham Collins via CnC-List <cnc-list@cnc-list.com> wrote: Subject: Re: Stus-List boat heating - was LF38 engine access - how bad is it really? To: cnc-list@cnc-list.com, "Hoyt, Mike" <mike.h...@impgroup.com> Date: Wednesday, December 3, 2014, 3:13 PM Hi Mike It is very do-able. Do you have the engine heating a hot water tank? Same process essentially. Hot water/glycol comes out of the engine, run it thru a Y valve. If set one way the flow is through the heat exchanger as usual, but if set the other way the hot stuff goes to a heater in the cabin and then into the heat exchanger on the engine. You would need: 1) radiator, such as this one 2) enough hose to connect it all up. 3) a Y valve to select cabin heat or no cabin heat. 4) a T (for the return) I've got a hydronic heating system on my boat with two radiators, my espar heats these and the water tank - but the idea is the same. I couldn't go the engine heated route because mine is a 3GM = raw water cooled. If you would like to have a look at my setup we can arrange it. Graham Collins Secret Plans C&C 35-III #11 On 2014-12-03 11:12 AM, Rick Brass via CnC-List wrote: #yiv1582812466 #yiv1582812466 -- _filtered #yiv1582812466 {panose-1:2 4 5 3 5 4 6 3 2 4;} _filtered #yiv1582812466 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv1582812466 {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;} _filtered #yiv1582812466 {font-family:Papyrus;panose-1:3 7 5 2 6 5 2 3 2 5;} _filtered #yiv1582812466 {panose-1:3 2 4 2 4 6 7 4 6 5;} #yiv1582812466 #yiv1582812466 p.yiv1582812466MsoNormal, #yiv1582812466 li.yiv1582812466MsoNormal, #yiv1582812466 div.yiv1582812466MsoNormal {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;} #yiv1582812466 a:link, #yiv1582812466 span.yiv1582812466MsoHyperlink {color:blue;text-decoration:underline;} #yiv1582812466 a:visited, #yiv1582812466 span.yiv1582812466MsoHyperlinkFollowed {color:purple;text-decoration:underline;} #yiv1582812466 p {margin-right:0in;margin-left:0in;font-size:12.0pt;} #yiv1582812466 span.yiv1582812466EmailStyle18 {color:#1F497D;} #yiv1582812466 span.yiv1582812466EmailStyle19 {color:#1F497D;} #yiv1582812466 .yiv1582812466MsoChpDefault {font-size:10.0pt;} _filtered #yiv1582812466 {margin:1.0in 1.0in 1.0in 1.0in;} #yiv1582812466 div.yiv1582812466WordSection1 {} #yiv1582812466 Mike; Josh is correct in saying the “F” in the model number of older Yanmar engines designated freshwater cooled, and the use of a heat exchanger on the engine. On a freshwater cooled engine the water/glycol coolant mix in the block is circulated through a heat exchanger – which is analogous to the radiator in your car. Raw water, drawn from outside of the boat, is circulated through the heat exchanger and removes the heat from the water/glycol coolant before being used to cool the exhaust gasses and being discharged overboard. In your car, the relatively cold air passing through the radiator takes the heat away from the water/glycol coolant in the engine. If there is no “F” in the model number of an older Yanmar, it is a raw water cooled engine. Seawater is drawn from outside, pumped through the engine to cool it, then mixed with the exhaust to cool that, and then discharged overboard. Now I said “older” Yanmar engines because every model in their current product line seems to come with a heat exchanger and fresh water cooling. In response to another comment made about the “GM”, “HM”, “QM” model designation (the current engines are “YM”) that is a model series designation. It almost looks like it relates to the generation of emission controls present on the engine. I notice that the YM series is designed to meet the diesel emission standards that started to become effective in 2011 in the US. So “2” or “3” is the number of cylinders. “GM” etc. is the engine series. “30” is the nominal horsepower. And “F” is freshwater cooled. (On the 4 cylinder engines “TE” is turbocharged, and “ETE” is intercooled and turbocharged.) Your idea about having an engine powered heater for the boat is an interesting one. It would be relatively easy to tap the hot water/glycol cooling system (we do it all the time now for installing a water heater on the boat) and route some of the coolant through a radiator inside the cabin (analogous to the heater core in your car). An electric fan could provide air circulation. And you would want to come up with some sort of thermostatically controlled valve to throttle the flow of hot water to match the heating needs inside the cabin. Pretty doable, but the devil would be in the details. Rick Brass Imzadi C&C 38 mk 2 la Belle Aurore C&C 25 mk1 Washington, NC From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Hoyt, Mike via CnC-List Sent: Wednesday, December 03, 2014 8:29 AM To: Josh Muckley; cnc-list@cnc-list.com Subject: Re: Stus-List LF38 engine access - how bad is it really? Josh I am guessing heat exchanger that you refer to does not mean the same as in everyday life where it can be used as a heater for the boat with some reworking. Am I incorrect? I have 3GM30F and some days it is miserably cold while underway and the option of an onboard engine driven heater might be nice Also. I think your landfall38s likely have tons more access than our frers 33 with an oversized engine. Maybe Rich and I will have to compare next summer Mike Persistence -----Inline Attachment Follows----- _______________________________________________ This List is provided by the C&C Photo Album Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album Email address: CnC-List@cnc-list.com To change your list preferences, including unsubscribing -- go bottom of page at: http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com