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Webasto turned on by Water Heater ?

Yahoo Message Number: 62298
My manual (99 Magna) says " thermostat in water heater turns on Webasto when hot water needed.." Anybody ever heard of such a thing ? I cannot find such a tstat and also Webasto will not fire up unless Comfort TStat is set to Furnace, which would preclude a/c operation. So, in summer, how could a tstat in water heater turn "ON" the webasto ?

Re: Webasto turned on by Water Heater ?

Reply #1 –
Yahoo Message Number: 62299
Was un-aware of this feature...

I looked in my manual and it says: "To activate the fresh water heating feature, turn both the CENTRAL HEAT CONTROL and INTERIOR HEAT EXCHANGERS switches on. A thermostat at the water heater works to automatically cycle the furnace on and off to maintain potable water temperature of approximately 150-160 deg. F."

Buck

k7wn '99Magna#5653

Re: Webasto turned on by Water Heater ?

Reply #2 –
Yahoo Message Number: 62306
My manual says only the Central switch needs to be on. But, it doesn't say anything about the Comfort Tstat setting.
However, I still can't physically find a tstat on the water heater that has anything to do with the Webasto. The water heater has two klixon type tstats, one for LP an one for 110V. No mas.

Re: Webasto turned on by Water Heater ?

Reply #3 –
Yahoo Message Number: 62310
? Have you considered going over the Hydronic Heat Group here on Yahoo. As with all groups joining is free and the owner Roger Burke is a registered AquaHot Tech and very good. Also there are many others in the group. I have only seen a Webasto unit once in a 2000 Magna and was working on another problem. I am not a tech. They are fairly rare these days even though Webasto makes the burner used in the AquaHot products.

Just a thought.

Don Seager

2004 Allure 31046

Re: Webasto turned on by Water Heater ?

Reply #4 –
Yahoo Message Number: 62311
The "problem" I believe is with the way CC hooked up the webasto. In normal coach heating mode, it works fine. But when you get into bay heating and hot water heating, it's just a question of how CC did it. And they were not consistant. --- On Wed, 8/11/10, Don Seager wrote: From: Don Seager Subject: Re: [Country-Coach-Owners] Re: Webasto turned on by Water Heater ?To: Country-Coach-Owners@yahoogroups.comDate: Wednesday, August 11, 2010, 7:48 AM

? Have you considered going over the Hydronic Heat Group here on Yahoo. As with all groups joining is free and the owner Roger Burke is a registered AquaHot Tech and very good. Also there are many others in the group. I have only seen a Webasto unit once in a 2000 Magna and was working on another problem. I am not a tech. They are fairly rare these days even though Webasto makes the burner used in the AquaHot products.

Just a thought.

Don Seager

2004 Allure 31046

My manual says only the Central switch needs to be on. But, it doesn't say anything about the Comfort Tstat setting.
However, I still can't physically find a tstat on the water heater that has anything to do with the Webasto. The water heater has two klixon type tstats, one for LP an one for 110V. No mas.--- On Tue, 8/10/10, buck wrote: From: buck Subject: [Country-Coach- Owners] Re: Webasto turned on by Water Heater ?To: Country-Coach- Owners@yahoogrou ps.comDate: Tuesday, August 10, 2010, 6:57 PM
Was un-aware of this feature... I looked in my manual and it says: "To activate the fresh water heating feature, turn both the CENTRAL HEAT CONTROL and INTERIOR HEAT EXCHANGERS switches on. A thermostat at the water heater works to automatically cycle the furnace on and off to maintain potable water temperature of approximately 150-160 deg. F."Buckk7wn '99Magna#5653------------ --------- --------- --------- --------- ----------- In Country-Coach- Owners@yahoogrou ps.com, "TURBOCC" wrote:>> My manual (99 Magna) says " thermostat in water heater turns on Webasto when hot water needed.."

Re: Webasto turned on by Water Heater ?

Reply #5 –
Yahoo Message Number: 62314
Thanks for the tip Don... Didn't know there was a Hydronic Heat Group...
As to the Comfort Control, it must be on the "furnace" setting when using the Webasto...
I turn off the hot-water heater (both the electric and propane) when using the Webasto, and I always have hot water... But, since the Webasto comes on to heat the coach when neccessary, I just assumed it was heating the water at the same time...
I suggest we turn on the CENTRAL HEAT CONTROL, the INTERIOR HEAT EXCHANGERS, set the Comfort Control to FURNACE and let the Webasto do it's thing... Doesn't really matter if it is turned on by a separate thermostat or comes on when the Comfort Control thermostat turns it on to to heat the coach...

Buck

k7wn '99Magna#5653

Re: Webasto turned on by Water Heater ?

Reply #6 –
Yahoo Message Number: 62315
So how do you get the webasto to heat the hot water in the summer when you are trying to run the air condtioners ? Comfort Tstat will not allow Furnace and Cooling at same time.

Re: Webasto turned on by Water Heater ?

Reply #7 –
Yahoo Message Number: 62322
? If the intention of the installation was to have it provide hot water assistance even during hot weather then I would think that the designer would have given that some consideration. My HydroHot is not as complicated as it has just two control switches. Diesel on/off and Electric on/off. The HydroHot has a electric element in the coolant tank so you don't need the burner in marginal temps and usage.
Whether or not the diesel burner or the electric element is heating the coolant in the tanks is controlled by high and low level temp sensors in the tank. There is no logical or physical connection to the House Tstat. All that does in the furnace mode is control the interior heat exchanges, fans and circulator pumps. The mode can be set to AC and it has no effect on the firing of the furnace.
The furnace cannot be allowed to run all the time that the House Tstat is calling for heat as it could boil the coolant. In all forced hot water systems in stick houses that is the way they work for the same reason Tstats control circulator pumps and aquastats maintain the coolant/boiler temp. Hot water or not I don't see how it can be any other way safely.

Don Seager

2004 Allure 31046

Re: Webasto turned on by Water Heater ?

Reply #8 –
Yahoo Message Number: 62324
I only use the Webasto to heat the coach during cold weather... The fact that it heats water while heating the coach is a nice by-product of heating the coach...
So, why run the Webasto and burn diesel fuel to heat water when you can heat water with electricity (when plugged in to AC), or with propane (when boondocking)??

Buck

k7wn '99Magna#5653

----------

d

Re: Webasto turned on by Water Heater ?

Reply #9 –
Yahoo Message Number: 62327
I agree you don't really need the Webasto to heat water, but that is how CC says they wired the system. On motorcoaches I've found you can't have too many back-up systems.

Re: Webasto turned on by Water Heater ?

Reply #10 –
Yahoo Message Number: 62329
Don,

I worked on 1993 CC with the webasto. It is set up as follows. The webasto has to be turned on, but it will not come on unless one of the thermostats are in the furnace mode, that allows the webasto to run, then when the tstat calls for heat it activates the fans and pumps. The webasto on this unit will not come on unless at least one tstat is set to furnace. The unit does not provide domestic hot water, just heat.

Mikee

Re: Webasto turned on by Water Heater ?

Reply #11 –
Yahoo Message Number: 62331
Mikee,

Ok, like I said I have only seen one once so I have been guessing based on common sense and logic combing with how a HydroHot works. I stated that right up front. I certainly can not disagree with you nor do I want to but I don't think that wiring it like that made a lot of sense
Some of the Webastos may create hot water or so called 'hot water assist' by circulating hot coolant in a coil wrapped around the propane/electric hot water heater. I believe that was the case that brought up this discussion. The owner is looking for the Tstat on the hot water heater that controls the Webasto. Maybe the hot water assist is only coming from the engine while on the road and not the Webasto at all.
I suggested a visit to the Hydronic Heat Group where there is likely a better knowledge base.

Thanks,

Don Seager

2004 Allure 31046

Re: Webasto turned on by Water Heater ?

Reply #12 –
Yahoo Message Number: 62333
I guess my manual pages on the webasto must have come from a Winnebago. They sure don't seem to apply to my Magna. --- On Wed, 8/11/10, mbaul wrote: From: mbaul Subject: Re: [Country-Coach-Owners] Re: Webasto turned on by Water Heater ?To: Country-Coach-Owners@yahoogroups.comDate: Wednesday, August 11, 2010, 11:30 AM

Don,

I worked on 1993 CC with the webasto. It is set up as follows. The webasto has to be turned on, but it will not come on unless one of the thermostats are in the furnace mode, that allows the webasto to run, then when the tstat calls for heat it activates the fans and pumps. The webasto on this unit will not come on unless at least one tstat is set to furnace. The unit does not provide domestic hot water, just heat.

Mikee

In a message dated 08/11/10 13:08:30 Eastern Daylight Time, dmseager@earthlink. net writes: ? If the intention of the installation was to have it provide hot water assistance even during hot weather then I would think that the designer would have given that some consideration. My HydroHot is not as complicated as it has just two control switches. Diesel on/off and Electric on/off. The HydroHot has a electric element in the coolant tank so you don't need the burner in marginal temps and usage.
Whether or not the diesel burner or the electric element is heating the coolant in the tanks is controlled by high and low level temp sensors in the tank. There is no logical or physical connection to the House Tstat. All that does in the furnace mode is control the interior heat exchanges, fans and circulator pumps. The mode can be set to AC and it has no effect on the firing of the furnace.
The furnace cannot be allowed to run all the time that the House Tstat is calling for heat as it could boil the coolant. In all forced hot water systems in stick houses that is the way they work for the same reason Tstats control circulator pumps and aquastats maintain the coolant/boiler temp. Hot water or not I don't see how it can be any other way safely.

Don Seager

2004 Allure 31046

So how do you get the webasto to heat the hot water in the summer when you are trying to run the air condtioners ? Comfort Tstat will not allow Furnace and Cooling at same time.--- On Wed, 8/11/10, buck wrote: From: buck Subject: [Country-Coach- Owners] Re: Webasto turned on by Water Heater ?To: Country-Coach- Owners@yahoogrou ps.comDate: Wednesday, August 11, 2010, 9:34 AM
Thanks for the tip Don... Didn't know there was a Hydronic Heat Group...As to the Comfort Control, it must be on the "furnace" setting when using the Webasto... I turn off the hot-water heater (both the electric and propane) when using the Webasto, and I always have hot water... But, since the Webasto comes on to heat the coach when neccessary, I just assumed it was heating the water at the same time...I suggest we turn on the CENTRAL HEAT CONTROL, the INTERIOR HEAT EXCHANGERS, set the Comfort Control to FURNACE and let the Webasto do it's thing... Doesn't really matter if it is turned on by a separate thermostat or comes on when the Comfort Control thermostat turns it on to to heat the coach...Buckk7wn '99Magna#5653------------ --------- --------- --------- --------- ----------- In Country-Coach- Owners@yahoogrou ps.com, "Don Seager" wrote:>> Have you considered going over the Hydronic Heat Group

Re: Webasto turned on by Water Heater ?

Reply #13 –
Yahoo Message Number: 62335
Don had the right idea when he suggested the Hydronic Heating group is the best place to have this discussion...
Keep in mind James, that Mikee states he worked on a 1993 version of the Webasto... By the time ours came along in '99, improvements must have been made 'cause my Webasto definitely heats water... But, ONLY when being used as a furnace to heat the coach...
Yes, the manuals do have their faults, but mine have saved my bacon more times than I can count... Take the text with a grain of salt and look at the Schematic diagrams in the back of the User's Guide when you really need to "figger" out how something works.

Buck

k7wn '99Magna#5653

---------

Re: Webasto turned on by Water Heater ?

Reply #14 –
Yahoo Message Number: 62344
Do you truly have Webasto heaters or are they Hurricane? My documentation shows me having a Webasto but I have a Hurricane.
Kevin Burns

00 affinity, #5865

Re: Webasto turned on by Water Heater ?

Reply #16 –
Yahoo Message Number: 62347
Yep... Mine's a Webasto... Model DWB2010, Serial Number 196003.

Buck

k7wn '99Magna#5653
 

Re: Webasto turned on by Water Heater ?

Reply #17 –
Yahoo Message Number: 62356
Don, you are correct, the Webasto (or my Hurricane) have a coolant loop that is attached to the Atwood water heater. (It is a pipe welded to the outside of the heater). When the furnace runs, it heats the water slowly. I think that is what he is experiencing.

Rich 2002 Magna