20 June, 2017

Diesel heater installation III.

Finally, after two weeks of intense work, I'm done with the heater installation.
I was doing this for the first time, but if I exclude all that challenging woodworking, it was pretty easy and straight forward project.
Electrically speaking, you have to just supply the onboard power, connect the control panel and that's it.

Webasto heater unit in the port cockpit locker

The exhaust pipe is attached to the hull using one support pad made from the heat resistant material. The bold is going through one layer of that material and the second one is glued with the hole bigger than the bolt head to leave a distance between the bolt and the hull.
Everything was then glued to the hull with Sikaflex.
One remark regarding the exhaust pipe connection. The installation manual doesn't mention it, but when I first started the heater, I saw a little of smoke from the joints so I've applied a little amount of the exhaust cement seal used in automotive.

exhaust pipe with heat insulation "sock"

Exhaust outlet

In the same port locker, there is also a 7 liter diesel fuel tank from Ateso and the fuel pump attached directly to it with the fuel filter. I was trying to follow the installation instruction as possible to keep the right angles on the fuel pipe so the known fuel pump ticking is really inaudible in the cabin.

Diesel tank for the heater

The control unit was attached in the cabin next to the main distribution panel. It has also the build in thermostat so there no need for more holes.
There is an option to configure the startup mode - heating or venting, startup temperature and so on. You can also configure the schedule for automatic startup.

MultiControl display

The electrical installation requires direct connection to the battery to avoid unintentional power cut and to allow the heater to cool down. You can see the small fuse box with two fused 15A for the glow plug and 1A for the heater and control unit.

Separate fuse box

And finally this is the pictures of the vent outlets in the cabin. One with closable vent in the head, one for the cabin and one in aft berth.


Cabin vent outlets

Rotating outlet in the aft berth

Hose cover in the aft of the head

The last thing I would like to show here is the relocated outboard fuel tank to the center cockpit locker.

Outboard fuel tank

I hope we will now enjoy more cozy days and nights on our boat.


Updated 31.7.2017During the first tests of the heater, I've found out that the temperature control does not work at all. Later on I've discovered, that the temperature sensor in the MultiControl unit is NOT used for heating control as I thought initially, so I had to install the external temperature sensor which was included in the kit.

External temperature sensor installed

Secondly, there is a possibility to configure the MultiControl to display the actual temperate in the left upper corner, but you need the special diagnostic cable Webasto 9029674B. Then simpy plug in the cable into the diagnostics port. The control unit will reboot and then you will see a technician menu. You can change some parameters, but I think the only option it's worth it, is to show the actual room temperature.
If you don't want to spend money for that simple piece of cable and have some electrical skills, you can disassemble the MultiControl unit and just join two pins of the diagnostic connector to do the same. More information can be found here.

Enable technician mode on MultiControl unit

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