Webasto woes again

[RichardEntrekin]

Woo Hoo!  I am glad someone else could profit from my mistake.

[opus]

.35 is right.  Mine is fine and I'm at 7000' quite a bit.  Is this running on battery only?  They like 12v+  I havent run mine off of batteries, ever since I had a melt down.  Well, not me, the Webasto.

[David Anderson]

.35 is right.  Mine is fine and I'm at 7000' quite a bit.  Is this running on battery only?  They like 12v+  I havent run mine off of batteries, ever since I had a melt down.  Well, not me, the Webasto.

It didn't matter.  Battery power at 12.6volts +/- or tied to the power pole with the inverter keeping the float voltage at 13.6.  I always had the same results.

[David Anderson]

I want to bounce this back to the top of the board.

My wife and I have been sking in Taos for a week and have used the Webasto extensively.  It has worked flawlessly since I sealed the grommets and mated the burner head and tightened it to the water jacket.  It has been 10-12 degrees every night and we are very comfortable in the coach, and my mechanical bay is happy, too.  We are at 9000 ft elevation.  I did open the air intake at the burner head for the higher altitude.  Last spring I installed an hour meter by tapping the fuel pump circuit and my run time has been 5 hrs per day since we arrived.  This gives me a decent measure of fuel consumed.  At .35 gals per hour that's 1.75 gals/day.   I think I read somewhere a DBW2010 burns about .35 gals/hour.

Anyway, I am so happy this thing is finally working like it should.
Thanks again, Richard.
David

PS,  we have also been using it off grid dry camping at Quartszite for 4 days, 6 days at Lake Havasu ballon festival and 2 nights at Twin Arrows casino in Flagstaff (real cold there).  It has been great. 

[RichardEntrekin]

Thanks for the shout, and I am so glad you are toasty.

You bus DIY guys might want to look this thread over. When my Webasto controller became so flaky, that a replacement was inevitable, I decided to go a cheaper more reliable route. I also used the opportunity to replace and upsize the internal wiring in the burner.

https://www.wanderlodgeownersgroup.com/forums/showthread.php?t=32866

[buswarrior]

Alternatives to the expensive Webasto controller parts:

Here's the guts of the linked info, go to the original site for the pictures and follow up posts:

The links don't go direct anymore, and they have 24 volt options as well as 12 volt.

Just so the info is embedded here, and as time goes by, the references don't disappear. Credit to Wanderlodge owners group and poster "Flyfisher"



Old 12-05-2018
Flyfisher Flyfisher is offline
Senior Member
        
Join Date: Mar 2016
Location: Beverly Hills
Posts: 544

Default Aqua Hot 12VDC Controller Mod
Replaced the original Webasto controller and igniter with 12 VDC units made by Beckett.

The replacements have tested satisfactorily the last couple of days, but time will tell if they are the right choice. I wired them into the Aqua Hot and the Wesbasto burner exactly like the instruction schematic described. The only change I made to the control circuit was the addition of a Bosch relay in the dash light circuit to receive an alarm signal from the controller and break ground so it goes out when controller senses a fault and turns off the burner. The dash light functions as original, being lit when hydronic heat switch is closed and off when the switch is open or a fault occurs. The relay circuit can be left out if you want the dash light on all the time the switch is closed with or without a fault. The B zone recirculation pump circuit is still powered from the burner motor circuit, just from a new terminal strip point instead of locally at the motor connections.

In my WB there is a shelf attached to the bay ceiling just at the north end of the Aqua Hot. This made a perfect mounting spot for the controller and the igniter and all wires drop straight down into the Aqua Hot in an area where nothing is stored that might impact the wiring. I left plenty of slack wire so removing and servicing the burner will be easy. I found that when I opened up the burner all the original wiring insulation was brittle, cracked and bare in spots, so I completely rewired it with long wire back to my terminal strip with no butt splices. You can also reuse your Webasto igniter if you choose, but I decided to go ahead and complete the swap out rather than later when it fails.

I attached a schematic I drew for review and anyone interested. Also, Clint if you're interested, maybe you could make a nice one from it (hint). Hand drawing it wore me out, I made so many errors that had to be corrected.

The Beckett controller comes with preset factory settings that can only be changed with a programming tool, which they sell for about $60. You can choose the settings you want by the part number though and not worry about change.

Here are the Beckett components I used:

Controller: P/N 7556P152MU
https://www.beckettcorp.com/product/...urner-control/

Igniter: P/N 5218301U
https://www.beckettcorp.com/product/...-oil-igniters/

Total cost of Becket components $240.00. The 22C Bosch relay came with the bus was removed from my Jake brake circuit to make it function correctly, so its been looking for a home, I won't talk about how much it has cost me!

[sledhead]

glad to here there is a inexpensive way to hopefully fix some of the problems with the older
webasto units .

I ended up replacing my aqua hot unit and made my own and it has been amazing with no problems and because I used a all aluminium marine water heaters I ended up having faster hot water and more of it then I had with the old unit . very happy 

dave 

[luvrbus]

I don't believe I would have any type diesel fired heat without a backup,my dual element AquaHot does a great job on the pole,I had a single element that was a 0 on the pole,parts prices for the webasto are all over the map I bought a new controller just in case from a distributor the price was not that bad

[buswarrior]

I wouldn't have ANY source of heat in the coach, without back-up.

The common busnut theme;

It ain't "IF" it breaks, it's "WHEN" ...

Happy coaching!
Buswarrior

[richard5933]

I agree.
Redundancy. Redundancy. Redundancy.

[luvrbus]

Yep people think propane is unsafe in  RV but it is the most dependable heat for a RV lol 78 degrees here and I am talking about heat go figure 

[buswarrior]

Luvrbus, shall we start a discussion on the relibaility of sail switches in the typical propane furnace, and the typical busnut's techniques for finding same?

Oh the fun we can have with heating appliances...!

Happy coaching!
Buswarrior

[luvrbus]

The sail (paddle) switch is just to be sure the motor is up to 75% power people change those all the time only to find out it is low voltage and besides they easy to bypass.propane furnaces are real reliable 

[dtcerrato]

Ditto... Propane furnaces are very reliable. Our secondary propane furnace in the bus is an outside vented Empire radiant heater from our 1973 S&S wreck - furnace was restored once & going strong. No fans, 12 vdc, nor sail switched required...