Thermostate Setting for Failing Squarrel Fan

[Troy Tikalsky]

Common part in gas furnace that most HVAC companies carry.

Troy

----- Original Message -----
From: sfedeli3
To: WanderlodgeForum@yahoogroups.com
Sent: Wednesday, August 22, 2007 8:00 AM
Subject: [WanderlodgeForum] Re: Thermostate Setting for Failing Squarrel Fan


Scott,
Replacement Snap Disk thermostats can be purchased at Grainger or on
Ebay. Here is a link for the one on ebay:

[http://cgi.ebay.com/Dayton-SNAP-DISC-FAN...56713\
QQcmdZViewItem]

If you go to Grainger, they usually have them on the rack out front.
They are very common in Restaurant equipment and you should have no
problem getting one. A common setting is one that closes the contacts
at 110 degrees and opens them at 90, but you could also use others.

Shane Fedeli
85PT40
Hershey, PA

--- In WanderlodgeForum@yahoogroups.com, "Scott Forman" <sforman@...>
wrote:
>
> Looks like this is my culprit. Where can a get a replacement
> thermostat?
>
> Scott
>
> --- In WanderlodgeForum@yahoogroups.com, "Howard O. Truitt"
> wrote:
> >
> > Scott,
> > Pull the thermostat and check the voltage going to the thermostat.
> May need a new thermostat.
> > Howard T., Sowega, 86 PT40, 8V92
> >
> >
> > ----- Original Message -----
> > From: Scott Forman
> > To: WanderlodgeForum@yahoogroups.com
> > Sent: Monday, August 20, 2007 12:57 PM
> > Subject: [WanderlodgeForum] Re: Thermostate Setting for Failing
> Squarrel Fan
> >
> >
> > OK...still fighting this project, need some suggestions.
> >
> > Everything is mounted and installed, but I cannot get the fan to
> > engage from the original thermostat. When I apply a flame to the
> > thermostat, I can hear it click and a small voltage begins
> flowing to
> > the original squirrel-cage wire. The problem, though, is that the
> > voltage at that wire is very weak, varying from less than 1 volt
> to
> > around 5. I cannot identify anything that makes the voltage
> change.
> > This voltage is not enough to close the relay and turn the fan
> on.
> >
> > Any suggestions as to what is causing the voltage to be low or
> how to
> > fix it? I guess this may be the reason the original fan quit
> working
> > in the first place.
> >
> > Scott
> >
> > --- In WanderlodgeForum@yahoogroups.com, "Howard O. Truitt"
> > wrote:
> > >
> > > Scott,
> > > That would be a safe assumption.
> > > Howard T, Sowega, 86 PT40
> > >
> > > ----- Original Message -----
> > > From: Scott Forman
> > > To: WanderlodgeForum@yahoogroups.com
> > > Sent: Saturday, August 18, 2007 3:36 PM
> > > Subject: [WanderlodgeForum] Re: Thermostate Setting for Failing
> > Squarrel Fan
> > >
> > >
> > > There are two wires going to my original fan, green & yellow.
> Is
> > it
> > > safe to assume green is ground and yellow is hot?
> > >
> > > Thanks
> > > Scott
> > >
> > > --- In WanderlodgeForum@yahoogroups.com, "sfedeli3" <sfedeli3@>
> > > wrote:
> > > >
> > > > Scott,
> > > > Use the 12V + wire going to the squirrel cage fan as
> > a "trigger"
> > > for
> > > > a Bosch style relay. You will want to supply the main voltage
> > to the
> > > > fan directly from a 12V source in your charger/Rediline
> > compartment.
> > > > The fan will draw better than 12 amps, which would burn out
> the
> > > > thermostat contacts over time if you don't use the relay. Be
> > sure to
> > > > also use 10 or 12 ga. wire for the fan. The trigger wire from
> > the
> > > > squirrel cage can be lighter size since it does not carry
> much
> > of a
> > > load.
> > > > I located the Bosch relay in the charger compartment and ran
> the
> > > > wires from the squirrel cage and to the fan through a 1/2"
> hole
> > in
> > > the
> > > > compartment wall. Make sure to use a grommet to prevent
> chafing
> > and
> > > > try to enclose all of the wires in wire loom or some sort of
> > > conduit.
> > > > If you are not familiar with how to wire the relay, this is a
> > great
> > > > project for learning- there are numerous links floating
> around
> > the
> > > web
> > > > with instructions. Also be sure to install a 20 A fuse
> between
> > the
> > > 12V
> > > > source and the relay.
> > > >
> > > > Shane Fedeli
> > > > 85PT40
> > > > Hershey, PA
> > > >
> > > >
> > > > --- In WanderlodgeForum@yahoogroups.com, "Scott Forman"
> > <sforman@>
> > > > wrote:
> > > > >
> > > > > Can someone explain how to run the wires for this set up?
> > > > >
> > > > > Scott Forman
> > > > > 86 PT38
> > > > > Memphis
> > > > >
> > > > > --- In WanderlodgeForum@yahoogroups.com, "sfedeli3"
> > <sfedeli3@>
> > > > > wrote:
> > > > > >
> > > > > > Hi Curt,
> > > > > >
> > > > > > My thermostat is mounted in the ceiling of the engine
> > > compartment
> > > > > > just above the alternator on my 6V92. It is about the
> size
> > of a
> > > > > small
> > > > > > bottle cap. I used it, in conjuction with a bosch relay,
> to
> > > power a
> > > > > > Hayden fan that cools the engine compartment. I used the
> > > largest fan
> > > > > > that I could find at Advanced Auto parts and mounted the
> > fan
> > > behind
> > > > > > the grill that provides access to the curbside of the
> > engine
> > > > > compartment.
> > > > > > Originally, I had set my fan to expel the hot air and
> work
> > in
> > > > > > tandem with the large engine fan to pass air through the
> > > > > compartment.
> > > > > > Once parked, however, I have achieved better results by
> > drawing
> > > > > cool,
> > > > > > outside air into the engine compartment, expelling it
> > through
> > > the
> > > > > > radiator. I usually just reverse the wires on the fan,
> > causing
> > > it to
> > > > > > run backwards. This would cool the compartment so fast,
> > that
> > > the
> > > > > relay
> > > > > > would shut it off, so I also installed a SPDT switch to
> > > override the
> > > > > > thermostat and leave the fan on. I may eventually install
> > at
> > > DPDT
> > > > > > switch to reverse the polarity without having to pull the
> > wires
> > > off
> > > > > > the fan. This setup has worked fine for about 12K miles
> and
> > the
> > > fan
> > > > > > does not seem to mind running in reverse.
> > > > > >
> > > > > > Shane Fedeli
> > > > > > 85PT40
> > > > > > Hershey, PA
> > > > > >
> > > > > > --- In WanderlodgeForum@yahoogroups.com, "Curt Sprenger"
> > > > > > wrote:
> > > > > > >
> > > > > > > Several of us have recently posted about the ratteling
> or
> > non
> > > > > working
> > > > > > > fan that is mounted in the upper rear area of the
> engine
> > > > > compartment.
> > > > > > > Does anyone know the thermostat degree setting for that
> > fan?
> > > > > Anyone
> > > > > > > know where that thermostate is located?
> > > > > > >
> > > > > > > My thought at this time is to control the add-in Hayden
> > fans
> > > to
> > > > > run
> > > > > > > off the same controls.
> > > > > > > --
> > > > > > > Curt Sprenger
> > > > > > > 1987 PT38 8V92 "MacAttack Racing"
> > > > > > > Anaheim Hills, CA
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > ----------------------------------------------------------
> > ----------
> > >
> > >
> > > No virus found in this incoming message.
> > > Checked by AVG Free Edition.
> > > Version: 7.5.476 / Virus Database: 269.11.19/955 - Release
> Date:
> > 8/15/2007 4:55 PM
> > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
> >
> >
> >
> > ----------------------------------------------------------
> ----------
> >
> >
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.5.476 / Virus Database: 269.11.19/955 - Release Date:
> 8/15/2007 4:55 PM
> >
> >
> > [Non-text portions of this message have been removed]
> >
>





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