Webasto install

[lostagain]

I bought a used Webasto Thermo Top C (17,000 BTU).

6V92TA.

I am installing it inline with the coolant line that goes from the engine to the front defroster. It will preheat the engine, then the generator, then go through a radiator in each baggage bay, to the defroster in the dash, and back to the engine.

Just to confirm what I think is right: which one is the supply line out of the engine? There are 2 lines: one comes out from the back of the engine, the other is T'ed into one of the rad pipes, looking like it returns to the water pump.

So I should T off of the one that comes out from the back of the engine, to go to the Webasto. And the return to the other line, right?

The bus has a propane furnace to heat upstairs. Boondocking overnight on the way South in the winter, first thing we do when we get out of bed is start the generator (propane), and turn on the 2 engine block heaters. By the time we finish breakfast etc, the engine is nice and warm and starts just by showing it the key. The problem is that if it is cold out (20 below is not uncommon in Montana or Idaho), the generator can be hard to start. So I am thinking this Webasto is going to preheat both the main engine and the generator, and the basement.

Anyway, I just want to make sure I tap into the right coolant line out of the engine.

Thanks.

JC

[buswarrior]

The line that comes out of the engine and heads straight forward is your goal.

Flow in same direction.

Where are you mounting it?

My big one was on the floor of a bay, big pipes were cut and everything went through the webasto on its way forward.

This was to heat the whole interior via an HVAC bypass switch, mobile classroom in its earlier conversion.

If you just have the defroster up there, the smaller pipe shouldn't be a problem.

The engine will get pre-heated when the return flow reaches the block.

Happy coaching!
Buswarrior

[lostagain]

Yes there is a line that comes out of the back of the engine and heads forward toward the front of the bus. The other line (the return),T's into one of the pipes for the driver's side radiator.

I am mounting the Webasto driver's side in the engine compartment near the fire wall. I have lots of room there. It is just under the coolant lines that go forward into the bus.

It will be a simple inline system: flow out of the engine, through the Webasto, through the generator, through the bay heating radiators, through the defrosters, then back to the engine.

JC

[Utahclaimjumper]

 That ought to keep things toasty JC..  I'm wondering if each "radiator" needs a fan for circulation.?? your bays are large.>>>Dan

[richard5933]

Curious why the bay radiator? To keep the wet bay warm while on the road?

[lostagain]

Dan, yes I am going to get radiators with fans.

Richard, the baggage tanks don't have any heat in them now, other than the water heater in one, and the propane furnace in the other, which is not much when it is 20 below outside. I have thought about blowing heat in there off the furnace, but it would rob off of upstairs. The hot water off the Webasto can be used for that.

JC

[buswarrior]

And the radiant heat of the defroster exchanger being warm is going to be noticeable.

For camping use, the driver's heat water valve will continue to regulate. Beware to not snuff out the flow...

Happy coaching!
Buswarrior

[sledhead]

with my cat if it is cold out there is not a lot of heat at the dash unless the boiler is on to boost the heat . it sure helps to keep the dash warm . It was not that bad on the 6v92 as it had lots of heat most of the time

dave

[lostagain]

Yea Dave, no lack of heat out of a 2 stroke. When I used to look after the hockey team's DL3 with S60, it had a 2020 Webasto that was necessary to keep the engine hot. The S60, like a lot of modern 4 strokes, doesn't heat up until you work it hard on the highway. They commonly come OEM with a coolant heater for that reason.

JC

[Geoff]

You are expecting a lot off 17,000 BTU's.  Those are made for car heating systems.  The correct Webasto would be a 45,000 BTU unit from a DBW 2010.

I bought a used Webasto Thermo Top C (17,000 BTU).

6V92TA.

I am installing it inline with the coolant line that goes from the engine to the front defroster. It will preheat the engine, then the generator, then go through a radiator in each baggage bay, to the defroster in the dash, and back to the engine.

Just to confirm what I think is right: which one is the supply line out of the engine? There are 2 lines: one comes out from the back of the engine, the other is T'ed into one of the rad pipes, looking like it returns to the water pump.

So I should T off of the one that comes out from the back of the engine, to go to the Webasto. And the return to the other line, right?

The bus has a propane furnace to heat upstairs. Boondocking overnight on the way South in the winter, first thing we do when we get out of bed is start the generator (propane), and turn on the 2 engine block heaters. By the time we finish breakfast etc, the engine is nice and warm and starts just by showing it the key. The problem is that if it is cold out (20 below is not uncommon in Montana or Idaho), the generator can be hard to start. So I am thinking this Webasto is going to preheat both the main engine and the generator, and the basement.

Anyway, I just want to make sure I tap into the right coolant line out of the engine.

Thanks.

JC

[TomC]

I agree with Geoff. 17,000 btu is a bit shy on power. Considering my propane furnace is 40,000btu just to heat the interior...

[Utahclaimjumper]

I don't think he intends to heat the bays as you would the interior of the coach,,, just enough to prevent freezing..

  JC,, Are you going to get as far south as Yuma this year.??>>>Dan

[lostagain]

Guys read my posts... The Thermo Top C, at 17,000 BTU, is made for transport trucks to preheat the engine, and heat the sleeper overnight. I am only going to preheat the generator and put the left over heat into the bays to prevent the plumbing from freezing. The 6V92 will be at the end of the loop. If it needs more, I run the electric block heaters off the generator.

Dan. We'll be in the SW in Jan, Feb, and maybe March. We'll see you I am sure.

JC

[buswarrior]

A guy from Alberta knows what a BTU is and how to deploy them

This appears to be about maintaining while operational, not being stone cold in the Arctic.

It doesn't take a nuclear event to start the big engine, or to prevent freeze-up, when you're already warm from the day's drive. Keeping it warm is a lot easier than getting it warm.

Big BTU are needed when you have a big temperature rise desired in a shorter time frame.

Happy coaching!
Buswarrior

[sledhead]

I returned home early from a florida trip one year and hit a cold front   
   - 30  burrrrrrr even with the proheat and the 6v92 working hard on the hills it was cold . had a hard time keeping the front window clear

never again ........ I hope

dave