Aqua Hot fuel consumption (was Re: dry camping)

[p_a_lazar]

Hi Ross,

First a warning.....

Do NOT run your engine with the preheat switch on as they are bucking
each other. The preheat circ pump wants to pump heated coolant to the
engine and the engine pump wants to heat the water heater.

As to the circ pump, if I am not mistaken, you do not actually have an
AH, but a Webasto and system installed by BB. The AH circ pump only
operates when heat is called for or the preheat is used.

I would call BB and ask them about the proper operation of the
Webasto, if in fact you don't have an AH.

Paul
97wb43

--- In WanderlodgeForum@yahoogroups.com, Ross MacKillop
wrote:
>
> Hi,
> Very confusing.
> I have 2 switches only.
> 1 on the dash èngine preheat and one in the galley area `webasto
> The eng. preheat turns on the webasto switch.(ie ligts it up)
>
> The manual is quoted here::
> Normal operation..........
> ......
> After the ignition period (about 10 sec) ,the ignitor shuts off, and
the burner continues to operate. The heater will operate until all the
zone thermostats are satisfied,or until the heater reaches its normal
operating temp. of 180 degrees. Once the normal operating temp is
reached the burner itself will cycle off and the combustion fan will
operate for an additional 2 minutes to purge the burner. If a zone
thermostat, domestic hot water aquistat ,or engine heat exchanger
aquistat is not satisfied, the circulation pump will continue to
operate.If a thermostat cannot be satisfied by the residual heat in
the system, and the water temp drops, the burner will restart and
cycle until all the thermostats are satisfied. Once the thermostats
are satisfied,the heater will go through its 2 minute purge, and the
circulation pump will ease. The circ pump will operate if the remote
switch and any thermostats or the domestic aquistat are on.The
circulating pump will
> be activated independently by the engine heat aquistat.
>
> When driving, I get no heat unless I turn on the webasto. When I
pull off the highway with the engine running, the webasto burner
cycles. Perhaps the circ pump doesn`t come on independantly as
suggested above.
> By the above description, I think the circ pump should shut down
occasionally -- better for dry camping.
> Does anyone have it operate this way.
>
> Ross
>
> ----- Original Message ----
> From: Leroy Eckert
> To: WanderlodgeForum@yahoogroups.com
> Sent: Tuesday, December 4, 2007 9:42:14 PM
> Subject: Re: [WanderlodgeForum] Aqua Hot fuel consumption (was Re:
dry camping)
>
>
>
>
>
>
>
>
>
>
>
>
>
> I guess that is what I was trying to say. Not matter the
configuration, if hot water is not moving it is not possible to have
continuous hydronic or radiant heat. Well stated Pete.
>
> Leroy Eckert
>
> 1990 WB-40 Smoke N Mirrors
>
> Dahlonega , GA
>
> Royale Conversion
>
>
>
> Pete Masterson wrote:
When I'm going over the road, I turn off the "hydronic heat" switch
>
> on the dash board. That keeps the burner from running, but the
>
> circulation pumps still pump as I'm able to turn on the thermostats
>
> and get heat from the A-H using engine heat only. This is one of
>
> those non-intuitive Blue Bird "secret" (otherwise non-documented)
>
> facts. I hate to admit this, but I only discovered this recently. But
>
> I only recently discovered that the Engine Pre-Heat uses the AquaHot
>
> to heat the engine. In my case both the "pre-heat" and the "hydronic
>
> heat" switches must be on for it to work.
>
>
>
> At least, it's how it works with my system.
>
>
>
> Pete Masterson
>
> '95 Blue Bird Wanderlodge WBDA 42
>
> aeonix1@mac. com
>
> On the road at Golden Colorado
>
>
>
> On Dec 4, 2007, at 5:41 PM, Ross MacKillop wrote:
>
>
>
> > Hi,
>
> > With your experience with Aquahot. I'm a newbi.
>
> > When dry camping -Start aquihot with both thermoststs and hot
>
> > water calling for heat. Burner runs as does recirc. pump. The
>
> > burner may cycle on and off. After a time the Therms are satisfied
>
> > as is the hot water. IMy recirc pump keeps running, Shouldn't it
>
> > shut off until the therms or WH calls?
>
> >
>
> > 2nd question-- When on the road- engine hot- my burner comes
>
> > on- I think it should not as the engine coolant should be
>
> > sufficient. The manual says that the recirc pump will run until the
>
> > retained engine heat is depleted. I think there may be another
>
> > recirc pump from the engine for this purpose.
>
> >
>
> > 2006 450 LXi
>
> > Ross macKillop
>
> >
>
> > ----- Original Message ----
>
> > From: p_a_lazar
>
> > To: WanderlodgeForum@ yahoogroups. com
>
> > Sent: Tuesday, December 4, 2007 5:42:29 PM
>
> > Subject: [WanderlodgeForum] Aqua Hot fuel consumption (was Re: dry
>
> > camping)
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> >
>
> > Pete et all,
>
> >
>
> >
>
> >
>
> > I have seen erroneous postings about the Aqua Hot numerous times
>
> >
>
> > pertaining to fuel usage.
>
> >
>
> >
>
> >
>
> > The Aqua Hot under 100% duty cycle (running 24 hrs a day) will ONLY
>
> >
>
> > burn 3 gals a day, NOT 1/2 gal an hour like a generator.
>
> >
>
> > BUT, since it couldn't possibly run that much, you really shouldn't
>
> >
>
> > give any thought to fuel consumption.
>
> >
>
> >
>
> >
>
> > I have had an Aqua Hot in my last two coaches and NEVER winterize,
>
> >
>
> > only use the AH. Last winter, when I didn't use the coach for 3
months
>
> >
>
> > (an all time first for me LOL) I used 100 gals of diesel over 90 days
>
> >
>
> > of use with temps between 10-30 degrees.
>
> >
>
> >
>
> >
>
> > Don't just take my word for it, call them and ask for yourself,
but it
>
> >
>
> > *really* doesn't use much fuel.
>
> >
>
> >
>
> >
>
> > Paul 97wb43
>
> >
>
> >
>
> >
>
> > --- In WanderlodgeForum@ yahoogroups. com, Pete Masterson
>
> >
>
> >
>
> > wrote:
>
> >
>
> >>
>
> >
>
> >> The all-electric 'Bird has AquaHot heat. Uses a Webasto burner to
>
> >
>
> >> burn diesel -- about 1/2 gal per hour when the burner is operating.
>
> >
>
> >> For low-demand use, it has a 2000 watt electric heating element that
>
> >
>
> >> operates with shore power or the generator. The AquaHot is a great
>
> >
>
> >> hydronic heating system. It also heats the engine water. I switched
>
> >
>
> >> on the engine pre-heat at about 5 this AM and when I started up at
>
> >
>
> >> about 8:30, the engine kicked over like it was a 95 degree day --
>
> >
>
> >> only it was 31 degrees outside having reached a low of 26 during the
>
> >
>
> >> early morning hours in Lubbock. The AquaHot also provides
>
> >
>
> >> _continuous_ hot water for domestic purposes (think shower). You
>
> >
>
> >> never run out of hot water, but if the source water is really cold,
>
> >
>
> >> it can get a bit less than ideally hot toward the tail end of a
>
> >
>
> >> shower. (Hint: use your onboard tank, it's usually warmer than
ground
>
> >
>
> >> water.)
>
> >
>
> >>
>
> >
>
> >> You don't need the generator or shore power for the AquaHot -- but
>
> >
>
> >> you do pay for the diesel. The advantage is that you gotta fill the
>
> >
>
> >> tank anyway, so it's no extra trouble (there is a small Racor
filter,
>
> >
>
> >> but it's never given any trouble and gets an annual replacement) .
>
> >
>
> >>
>
> >
>
> >> Of course, with diesel at $3.39/gal at some stations I saw today
>
> >
>
> >> (Flying J in Amarillo was $3.21) it now costs about $1.60 to $1.80
>
> >
>
> >> per hour to operate the Webasto burner.
>
> >
>
> >>
>
> >
>
> >> Pete Masterson
>
> >
>
> >> '95 Blue Bird Wanderlodge WBDA 42
>
> >
>
> >> aeonix1@
>
> >
>
> >> On the road at Lamar Colorado after a long day from Lubbock...
>
> >
>
> >>
>
> >
>
> >>
>
> >
>
> >>
>
> >
>
> >> On Dec 3, 2007, at 1:56 PM, bubblerboy64 wrote:
>
> >
>
> >>
>
> >
>
> >>> I had no idea that there even was an RV of any type that did not
>
> >>> have
>
> >
>
> >>> propane tanks? Guess that shows how out of touch I am. How about
>
> >
>
> >>> heat in cold conditions? I guess you would certainly be
running the
>
> >
>
> >>> generator then? I guess you pays your money and takes your choice.
>
> >
>
> >>> Gasoline or propane. Makes not a lot of difference?
>
> >
>
> >>> John Heckman
>
> >
>
> >>> central Pa
>
> >
>
> >>> 1973 FC
>
> >
>
> >>>
>
> >
>
> >>>
>
> >
>
> >>>
>
> >
>
> >> <snip>
>
> >
>
> >>
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> >
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> >
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> >
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