Installation of a Planar 2kw diesel heater in a GK29

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Hardover
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Installation of a Planar 2kw diesel heater in a GK29

Post by Hardover » Tue Jun 19, 2018 8:34 am

I've finally begun the installation of a Planar heater. The Planar receives good reviews online and is substantially cheaper than more well known brands. I was advised that the 2kw model is more than adequate to heat a 29' yacht and that these heaters are always better working hard than used on low power. Time will tell.
The ducting, ducting insulation and ancillary fittings were all sourced from a company specialising in ducted heating systems in motorhomes at a fraction of the cost. It's either identical in quality to the "marine" equivalent or superior.
The heater unit has been installed as high as possible under the coaming inside the starboard cockpit locker. Mounted on an L shaped stainless steel bracket which is bolted to the GRP coaming side through a piece of Mica board capable of withstanding very high temperatures. The flexible stainless steel exhaust pipe is 1mtr long and descends gently to a swan neck then to a a stainless double skinned thru hull fitting in the transom using exhaust clamps and exhaust jointing compound to ensure a gas tight seal. Immediately before the swan neck there is a small stainless steel muffler again connected with exhaust clamps. The muffler is wrapped in high quality exhaust bandage as used in race cars and the exhaust pipe covered in a tube of high temp silicone insulation. I'm told that I should be able to place my hand on the exhaust pipe when the unit is operating. The exhaust insulation which came with the unit has been used to protect several cables and the overflow from the water tank. The complete exhaust run will be fixed to more mica board. Hopefully there will be no danger of excess heat in the locker.
Air for combustion is taken from the cockpit locker and air for heating is via a short ducting run leading to the very rear of the port berth. I'm hoping this will provide good air circulation when the unit is operating.
I'm still in the process of fitting the ducting which will run on the starboard side with two vents - one in the saloon and the other in the forepeak. The ducting will be fitted inside a flexible aluminium duct which provides both thermal and accoustic insulation and is used in the hydroponic industry.

Hardover
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Re: Installation of a Planar 2kw diesel heater in a GK29

Post by Hardover » Tue Jun 19, 2018 5:09 pm

Well the ducting was much easier than I had anticipated. It's all in place including the insulation and I'm just waiting for the arrival of the vents to finish the job. I did originally plan to run the ducting beneath the cooker plinth but instead opted to run it in front due to gas pipes and cables. I'll have to box that in but I have some old mahogany shelving which I'll utilise. All in all it's looking a neat and tidy installation.
I was going to go for an independent fuel tank but on reflection have decided to take the easier route and opt for the fuel stand pipe option. Need to figure out how to best mount the fuel pump to keep everything as quiet as possible. There's a description of an installation back in 1997 in WOA technical archives and they discovered that the yacht hull in their GK24 was acting as a sounding board. The pump, which is of German manufacture, is supplied with a heavy duty rubber mounting designed to minimise noise but I'll see if I cant improve on that.......or not!

Jolly Roger
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Re: Installation of a Planar 2kw diesel heater in a GK29

Post by Jolly Roger » Wed Jun 20, 2018 12:02 am

Mount the pump on a piece of thick timber or plywood and fix this to a bulkhead with a foam barrier. That should act as extra insulation against sound vibrations.
Roger
Concerto Fulmar FR38
Photos at http://s1294.photobucket.com/user/Conce ... 2/library/

Hardover
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Re: Installation of a Planar 2kw diesel heater in a GK29

Post by Hardover » Thu Jun 21, 2018 7:11 am

Cheers Roger, am also playing around with the idea of suspending it using 3 lengths of bungee cord. Am going to give the system a test firing today to check everything out.

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Re: Installation of a Planar 2kw diesel heater in a GK29

Post by Jolly Roger » Thu Jun 21, 2018 9:43 am

The pumps are quite small and tend to click more than whir. Not a good idea to suspend the pump as if the bungee cord sags or breaks with age could cause a fracture of the pipework.
Roger
Concerto Fulmar FR38
Photos at http://s1294.photobucket.com/user/Conce ... 2/library/

Hardover
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Re: Installation of a Planar 2kw diesel heater in a GK29

Post by Hardover » Thu Jun 21, 2018 6:00 pm

Fired the heater up this morning and I have to say I'm impressed. I was expecting a lot of noise but it just purrs away. Possibly due to the thermal and accoustic duct insulation I used? We didnt even realise it was working until my wife started shouting out that there was hot air coming out. I ended up suspending the fuel pump in mid air using the rubbber holder fixed at one point. There is an intermittent clicking noise as the pump operates but it can't be heard in the saloon nor outside with the cockpit locker closed. The silicone exhaust lagging was hot to the touch but not unbearable but I may double it up anyway as I have 10mtrs of exhaust bandage left over. The combustion air intake with its fitted silencer was fairly quiet too. Both vents, one in the saloon and one in the forepeak opposite the heads, gave out a good stream of hot air with nothing more than a quiet murmur. We're going to end up with a warm and dry yacht.
It comes with a 7 day controller which I have yet to get fully to grips with. I did speak to the UK distributor of Planar heaters and they're going to put up a video on the net in the next few days on how to use it which is brilliant customer service.
The way I have it set up at the moment, the heater runs until it reaches the set temperature then operates on ventilation only mode until the inside temp drops to 5 degrees below then it kicks in again. It can be operated on ventilation mode only and can be programmed to operate autonmatically with the 7 day controller which could be useful. There's even an option for a modem so that it can be operated remotely via a smart phone.
The entire system came in at well under £700 and the unit itself comes with a 2 year warranty from the UK distributor in addition to the 2 year guarantee from the manufacturer. It took me longer to fit than I had expected but I was learning as I went along and I still have some tidying up to do. It's going to extend our sailing season dramatically - it's cold up here in the NE even in summer!

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