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Old 03-31-2017, 10:57 PM   #1
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Wabasto For House/cabin Heating

So I have been thinking about this for a while -

I have a Webasto coolant heater. It runs off of diesel from the tank.

I've been thinking about disconnecting the Webasto from the engine lines and
isolating the coolant lines from the Webasto to the rear heaters. This would basically be two separate systems. The defrosters would still run off of the engine coolant.

The rear heaters could be run while the bus was underway, but then also run while it is stopped for cabin heat. Separating the two systems would allow you to heat up the cabin without having to heat up the engine.

In addition to the Webasto, I also have an electric heater block heater that I think is on the bottom of the oil pan (but not sure).

Thoughts?
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Old 03-31-2017, 11:04 PM   #2
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Quote:
Originally Posted by karrlot View Post
So I have been thinking about this for a while -

I have a Webasto coolant heater. It runs off of diesel from the tank.

I've been thinking about disconnecting the Webasto from the engine lines and
isolating the coolant lines from the Webasto to the rear heaters. This would basically be two separate systems. The defrosters would still run off of the engine coolant.

The rear heaters could be run while the bus was underway, but then also run while it is stopped for cabin heat. Separating the two systems would allow you to heat up the cabin without having to heat up the engine.

In addition to the Webasto, I also have an electric heater block heater that I think is on the bottom of the oil pan (but not sure).

Thoughts?
You could, with strategic placement of valves, leave it so you could run the heaters when the engine is running and use the wwbasto when the engine isn't... And still heat the block on the off chance you find yourself in a cold climate.


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Old 03-31-2017, 11:08 PM   #3
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I mounted a webasto in the cabin heater circuit. It is looped in the under the seat heater core and then Tee'd into the front dash heating.
If I close one of the heater ball valves the the hot water does not circulate thru the engine but still thru the dash heater core.
The engine with expansion tank stays connected by the other open ball valve so that you do not have pressure build up.
If I want to preheat the engine then I just open the first heater ball valve.

Later J
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Old 03-31-2017, 11:29 PM   #4
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Originally Posted by Elfie View Post
I mounted a webasto in the cabin heater circuit. It is looped in the under the seat heater core and then Tee'd into the front dash heating.
If I close one of the heater ball valves the the hot water does not circulate thru the engine but still thru the dash heater core.
The engine with expansion tank stays connected by the other open ball valve so that you do not have pressure build up.
If I want to preheat the engine then I just open the first heater ball valve.

Later J
^^ like that lol

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Old 04-01-2017, 05:22 AM   #5
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Correct way to do it is to valve it similar to the seconddid so you can heat the engine if you want but don't have to. You need to make sure it's in the loop with your booster pump as most of these only have a fuel pump not a water pump.
Christopher
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Old 04-03-2017, 03:48 PM   #6
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Originally Posted by cadillackid View Post
Correct way to do it is to valve it similar to the seconddid so you can heat the engine if you want but don't have to. You need to make sure it's in the loop with your booster pump as most of these only have a fuel pump not a water pump.
Christopher
Webasto heaters don't have water pumps? What's the point, then, of turning them on via timer before you get to the bus in the AM?
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Old 04-03-2017, 04:06 PM   #7
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The one I have is a webasto tsl17 that has an integrated water pump. This stuff is made to run of the battery so is pretty efficient. I like to bring the pump wires to the outside so that I can circulate the water with the heater and engine shut off. For short naps in wintertime it can circulate the coolant and keep the cabin warmer.
You can see some pictures in Elfbus thread or directly in the photo album.

Later J
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