| Author |
Message |
Christopher Goodwin (Cgoodwin)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 10, 2005 - 5:14 pm: | |
Well as the coild has found its way to Seattle my 6V92TA has been a pain to start and working on the interior has become a pain due to the cold. I dug out a box in the back of my shop containing a Webasto diesel water heater and a bunch of plumbing I had gotten from another nut some years ago. My bus originally had such a unit but it was removed long before I got it leaving only the flashing control unit on the dash and an empty space in the engine compartment with a circulating pump connected to the battery with aligator clamps.
The unit I have had no markings on it, was in pieces, filthy and had been removed from its original home with a blue wrench (cutting torch). I located it in the space where one had been and figured out the routing of the hoses based on the manual which came with the bus, I then looked everywhere for photos of these units and eventually figured out what the mounting brackets originally looked like and thier sizes, I made these from angle iron and sheet metal (helps to have a sheer, bender, and a metal fab shop ;-)).
I took apart the unit whihc is composed of two parts, the first is a metal canister with a central flue, this is surrounded by the water tank, simple enough. The head however was not simple, it has a coil which creates an arc between two electrodes positioned in front of a nozzel, the nozzel is mounted to a gear driven fuel pump which is driven by the blower motor mounted behind it. In this way it will only pump fuel as long as the blower is functioning. In addition there is a small solenoid valve which can cut fuel to the nozzel. After a little messing about I got it to spark, the blower and pump working and the solenoid figuured out.
I managed to find the webasto tech site with complete wiring diagrams and parts lists at http://www.techwebasto.com/thermosystems_bus.htm and discovered that the only way to identify the model was by the nozzel used, mine turned out to be a DWB 300 whihc is a 104,000 btu unit.
I have located some of the parts needed to repair the damage from being removed with a torch at a local marine supply: Fuel lines, ignition cables and the connectors to hook up the control unit and today for the first time I fired it up in my shop. A single puff of smoke followed by the sweet smell of burning diesel fuel!
I could not run it for long without having coolant in the coolant jacket so now I am off to put it in the coach and give it a try. I thought the link to tech info might be useful to others. These units are very simple compared to the Gasoline Webasto units I have played with in the past and at 104,000 btu it should heat the engine and coach pretty quickly.
Chris |
David Evans (Dmd)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, December 10, 2005 - 6:13 pm: | |
I'm wondering which fuel will be most cost effective now and in the future to run a hydronic heater? At 2.80 a gal diesel it seems to get expensive. We thought a bout a propane fired unit but now we is perplexerated.Any thoughts on this? |
Deena K
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, December 11, 2005 - 12:13 am: | |
How does a webasto work heating the interior of the coach with no fans running. Do you have to run the engine also to power the the passenger fans? Thanks |
R.C.Bishop
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, December 12, 2005 - 12:00 am: | |
Webasto is a wonderful product, not without particular problems that can occur from time to time....all of which are well addressed by the Webasto Manuals. I wouldn't trade mine for three other choices.
The unit can be set up to avoid all heat exchangers, include all heat exchangers(providing residual as well as fanned heat), include, or exclude water heater, etc, etc.
I have no connection with them other than as a very satisfied customer, but if you will contact David Haynes at Vehicle Systems, he can give you a blow by blow, including diagrams, literature and product information.(There are other Distributors and repair places thruout the country.)
Very helpful to me over a number of years. Reasonable and responsive.
FWIW
RCB
'64 Crown Coach (HWC) |
Christopher Goodwin (Cgoodwin)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 16, 2005 - 10:04 pm: | |
Deena, my bus has radiators along the floor boards with two large copper pipes in them, you can pump engine coolant through them or not using a dash switch, when the engine is running the rads are heated by the engine, when the webasto is running it pumps heated coolant through the engine and rads. They are radiant with no fans but with almost 160 ft of length (two 40' sides, each with two pipes in them) they heat the interior fairly quickly. |
|