Engine Preheat Switch

[smquandt]

Mike

The two systems are independent of each other, no connection. I don't really
know the route for the plumbing at the engine, but it is the same path as the
water heater system that heats the water from the engine heat. I'll send you a
PDF, look at the last four they are for the hydronic heat.

In Marble Falls until 4/1 with a trip home to the cold to work for two weeks on
Saturday.

Steve Quandt
1993 PT-40
Iron Mountain MI
now in Marble Falls, TX




--- In WanderlodgeForum@yahoogroups.com, Michael Bulriss <mbulriss@...> wrote:
>
> Thanks for the input Steve! So I guess what you are saying is that when you
use the engine preheat the engine cooling system and the house hydronic heating
system are hooked together and share common fluid when the engine preheat is
used? Correct? Guess I should have flushed the house heating system when I
flushed the engine and put in new diesel antifreeze. Never thought about that
when I flushed the cooling system when we installed the new engine water pump
this summer. Good thing I have not used the Primus, so the new antifreeze
should not have mixed with the old green stuff in the hydronic system, correct?
>
> How long are you in Marble Falls for?
>
> Thanks,
>
> Mike Bulriss
> 1991 WB40 "Texas Minivan"
> San Antonio, TX
>
> --- On Thu, 2/18/10, SteveQ wrote:
>
> From: SteveQ
> Subject: [WanderlodgeForum] Re: Engine Preheat Switch
> To: WanderlodgeForum@yahoogroups.com
> Date: Thursday, February 18, 2010, 9:28 AM
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> Rick
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> I converted to a Webasto Scholastic unit so I only have one zone. The preheat
pump will work regardless if there is heat or not.
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> Steve Quandt
>
> 1993 PT-40
>
> Iron Mountain MI
>
> now in Marble Falls, TX
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>
> --- In WanderlodgeForum@ yahoogroups. com, Rick Davis wrote:
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> >
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> > Steve, your Primus has to be turned on for that upper dash switch to
circulate fluid to the engine, right? And if so, my coach as two boilers for
two zones, so which zone needs to be activated for that engine preheat to work?
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> > Rick Davis
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> > 1993 WBSA
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> > Loudon, TN
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> > (in New Orleans)
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> > ____________ _________ _________ __
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> > From: SteveQ
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> > To: WanderlodgeForum@ yahoogroups. com
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> > Sent: Wed, February 17, 2010 7:01:05 PM
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> > Subject: [WanderlodgeForum] Re: Engine Preheat Switch
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> > ÂÂ
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> > Mike
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> > On to the left, off to the right on my 93. There is a pump, I think it is
twelve volts that is behind my house battery trays. It circulates warm hot water
/ antifrezze mix to the engine and I think the hot water heater from you Primus
or Webasto unit. I found mine this summer when I turned on the switch and heard
it.
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> >
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> > Enjoying the weather in the Texas Hill country, above zero and no snow to
shovel
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> >
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> > Steve Quandt
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> > 1993 PT-40
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> > Iron Mountain MI
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> > now in Marble Falls, TX
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> >
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> > --- In WanderlodgeForum@ yahoogroups. com, "mbulriss" <mbulriss@ .> wrote:
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> > >
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> > > OK, I have one of those how-to questions that is not answered in 'the
book'. On my 91 on the far left topmost driver overhead dash panel, there is a
black two position toggle switch labeled "Engine Preheat" - that's it, no "on"
or "off" indication, no light. My question is: Is "on" when the switch is
toggled in to the left side or the right side of the switch? What kind of
electrical draw should I see on any of the gauges when it is on - *if* it is
working?
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> > >
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> > > Normally, we try to stay out of such climates where I would actually need
said switch, until this past weekend in the Texas hills where it got well below
freezing. ;^)
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> > >
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> > > Thanks,
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> > >
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> > > Mike Bulriss
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> > > 1991 WB40 "Texas Minivan"
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> > > San Antonio, TX
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