Today's Message Index:
----------------------
1. 12:48 AM - Re: Defrost switch (Carlos Trigo)
2. 12:52 AM - Re: Defrost switch (Carlos Trigo)
3. 01:25 AM - Re: Defrost switch (BobD)
4. 04:55 AM - Re: diy tablet efi (Harley Dixon)
5. 04:56 AM - Re: Defrost switch (Roger)
6. 05:37 AM - Re: Defrost switch (Tim Olson)
7. 05:52 AM - Re: Defrost switch (Tim Olson)
8. 06:31 AM - Re: Defrost switch (user9253)
9. 10:07 AM - Re: Defrost switch (Richard E. Tasker)
10. 10:10 AM - Re: Re: Defrost switch (Richard E. Tasker)
11. 10:13 AM - Re: Re: Defrost switch (Carlos Trigo)
12. 07:06 PM - Re: Defrost switch (user9253)
Message 1
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Subject: | Re: Defrost switch |
Ren=C3=A9
I am using the 12V version of a very cheap Chinese thing called XH-W3001
I have tested it with my fingers temperature and it works very well.
The only problem is that I cannot find its schematic and neither you or I ca
n read the characteristics
but mr. Google will show you plenty of videos in English explaining how it w
orks and how you set the temperatures
Cheers
Carlos
Enviado do meu iPhone
No dia 09/03/2018, =C3-s 23:13, Rene <rene@felker.com> escreveu:
> What thermostat are you using. I think I would like to do the same thing.
I only have a switch and I am using Rene=99 as the thermostat.
>
> Rene'
> 801-721-6080
>
> From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-lis
t-server@matronics.com> On Behalf Of Roger
> Sent: Friday, March 09, 2018 4:03 PM
> To: aeroelectric-list@matronics.com
> Subject: RE: AeroElectric-List: Defrost switch
>
> Carlos,
>
> Just wire the thermostat switch and the defrost switch in parallel. When t
he electronics temperature is high the thermostat will turn on the fan, no m
atter the position of the defrost switch. Also if you turn on the defrost s
witch the fan will stay on until you turn it off. If you have two switches i
n parallel, either one or both on will power up the fan.
>
> Roger
>
> Sent from Mail for Windows 10
>
> From: Carlos Trigo
> Sent: Friday, March 9, 2018 5:52 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Defrost switch
>
pt>
>
> In my RV-10 I installed 2 (computer type) cooler fans in the dashboard, wi
th the main purpose of cooling the atmosphere behind the instrument panel to
keep all the panel electronics happy.
> Those 2 fans get power through a thermostat, whose temperatures (to turn t
he fans on and off) can be set.
>
> Further to this electronics cooling function, and copying other fellow bui
lders idea, this fans may also be used to defrost the windshield interior su
rface.
> But for this defrost function, I want to be able to turn On the fans indep
endently of the thermostat, so I decided to put a switch for this.
>
> Now comes the question: how do I wire this switch in relation with the the
rmostat circuit?
> Do I have to use a diode?
>
> Thanks in advance
> Carlos
>
>
>
>
>
>
Message 2
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Subject: | Re: Defrost switch |
Roger
I am using the XH-W3001 that you can see in my previous post to Ren=C3=A9.
It has a small contactor (relay) which serves as the thermostat switch.
Again, if I parallel the manual defrost switch with the thermostat, my fear i
s what will happen when I turn on the manual switch when the thermostat cont
actor is closed.
Carlos
Enviado do meu iPhone
No dia 09/03/2018, =C3-s 23:54, Roger <rnjcurtis@charter.net> escreveu:
> A simple bimetal switch is all you need as a thermostat. It consists of a
bimetal strip which deforms as it is heated and closes the switch contacts.
I am not aware of any thermostat that would be harmed by paralleling it wi
th a switch. What thermostat are you using?
>
> Roger
>
> From: Carlos Trigo
> Sent: Friday, March 9, 2018 6:27 PM
> To: aeroelectric-list@matronics.com
> Subject: Re: AeroElectric-List: Defrost switch
>
> Thanks Roger
>
> My only fear is (was?) that when I turn on the defrost switch, it would ru
in something inside the thermostat.
>
>
> Enviado do meu iPhone
>
> No dia 09/03/2018, =C3-s 23:02, Roger <rnjcurtis@charter.net> escreveu:
>
> Carlos,
>
> Just wire the thermostat switch and the defrost switch in parallel.=C3=82
When the electronics temperature is high the thermostat will turn on the fa
n, no matter the position of the defrost switch.=C3=82 Also if you turn on t
he defrost switch the fan will stay on until you turn it off.=C3=82 If you h
ave two switches in parallel, either one or both on will power up the fan.
>
> Roger
>
> Sent from Mail for Windows 10
>
> From: Carlos Trigo
> Sent: Friday, March 9, 2018 5:52 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Defrost switch
>
pt>
>
> In my RV-10 I installed 2 (computer type) cooler fans in the dashboard, wi
th the main purpose of cooling the atmosphere behind the instrument panel to
keep all the panel electronics happy.
> Those 2 fans get power through a thermostat, whose temperatures (to turn t
he fans on and off) can be set.
>
> Further to this electronics cooling function, and copying other fellow bui
lders idea, this fans may also be used to defrost the windshield interior su
rface.
> But for this defrost function, I want to be able to turn On the fans indep
endently of the thermostat, so I decided to put a switch for this.
>
> Now comes the question: how do I wire this switch in relation with the the
rmostat circuit?
> Do I have to use a diode?
>
> Thanks in advance
> Carlos
>
>
>
>
>
>
>
Message 3
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Subject: | Re: Defrost switch |
argoldman(at)aol.com wrote:
> So the question that is begged is what will blowing ambient air on a frosted
windscreen do. In your car the defrosted air is heated additionally the air conditioner
compressor is activated (temperature permitting) to reduce moisture.
Your body is constantly creating moisture ( primarily through respiration and
sweating) this condenses on the inside of your windscreen under certain conditions.
Unheated blown air will have little effect. It will have less effect on
ice on the outside. Perhaps a small electric heater will help.
>
> Keep cool (warm)
>
> Rich
>
Rich, I hate to disagree, but I have fitted three small computer fans in the top
cowling of my Europa control panel. See attached photos. I have just completed
the test flying of the aircraft, and these three fans kept the pilots side
of the windscreen pretty clear, while my side (passenger/observer) was constantly
misted up, and I was forever having to wipe the screen to clear it. This was
in February weather in the UK (i.e. cold !), so I guess body heat was causing
the condensation. Those familiar with the Europa will know that the control
panel only stretches to three quarters the width of the cockpit, hence I wasn't
able to position a fan for the passenger side, or I would have. As my panel
is fully electronic, I guess the air being blown over the windscreen is partially
heated by the output from the electronics.
Just as an aside, I changed the fan covers to brown (rather than white) having
picked up a tip on here that using dark covers prevented/reduced reflections on
the windscreen.
Just my tuppence worth :D
--------
Bob Dawson
XS TG || 912 ULS || G-NHRJ
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478542#478542
Attachments:
http://forums.matronics.com//files/2017_09_04_153531_224.jpg
http://forums.matronics.com//files/demisters2_554.jpg
Message 4
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Subject: | Re: diy tablet efi |
I have to agree with what Charlie suggested! It is EXACTLY the
combination that I have for my Long EZ! Have also used the Nexus with
Google Maps to guide me and my truck for long trips on the ground both
here in the east and in the southern deserts of Arizona. Very happy with
it. And very visible in bright daylight.
Additionally, Avare can be set up to "fly" at home by reading GPS data
from the X-Plane simulator (to do that, you have to install an Avare
plug-in app that reads X-Plane and sends the data via Wi-Fi to Avare).
During these cold winter months, I've successfully made 12 hour cross
country flights with my simulated Long EZ while sitting right here next
to my computer!
Harley Dixon
Long EZ N28EZ
Canandaigua, NY
------------------------------------------------------------------------
On 3/9/2018 8:47 PM, Charlie England wrote:
> If you need to keep it cheap, both the old Nexus 7 models have very
> bright, hi res screens. Cheap if bought used on ebay. Avare & that SDR
> ADSB receiver work great on them.
>
> Charlie
> On Mar 9, 2018, at 4:48 PM, Bill Maxwell <wrmaxwell@bigpond.com
> <mailto:wrmaxwell@bigpond.com>> wrote:
>
> I think the Samsung 5 phone has the better amoled screen. What
> screen type does your tablet have?
>
>
> On 9/03/2018 2:24 PM, Ernest Christley wrote:
>> I spent quite a bit of time last year using a Android tablet and
>> a Android phone (Samsung 5) for navigation. Granted, my canopy is
>> tinted, but I never had an issue with the sun being to bright to
>> use them.
>>
>>
>> On Thursday, March 8, 2018 4:18 PM, Bill Maxwell
>> <wrmaxwell@bigpond.com> wrote:
>>
>>
>> There are a few projects that I have come across on the net, Skip
>> althoughI can't find any links at the the moment. One problem
>> with the pad based approach though is the visibility of the TFT
>> screen in bright sunlight. The tablets using oled (also known as
>> amoled) TFT s displays are the best in this regard but not many
>> manufacturers are using them. Samsung were a couple of years ago
>> but even they seem to have now followed the general market trend
>> and discontinued them.
>>
>> On 9/03/2018 3:34 AM, Skip wrote:
>>> Althought I was the first in town to have and build a pc, I am
>>> sadly out of touch with current technology. I have been reading
>>> the automotive boards, people are putting in mini computer
>>> systems with a tablet monitor and running everything, even the
>>> electric seats. So my question here, has anyone any information
>>> on putting together an inexpensive tablet based system for
>>> experimentals? I just bought a 10 inch from Walmart for $60,
>>> runs android, wifi, bluetooth.
>>>
>>> I would think it could display a gps, engine instruments, Stormy
>>> Daniels, and other stuff cheaply.
>>>
>>> Cell technology tablets aren't much more, that would keep it
>>> connected at all times? Can you get cheap weather radar on your
>>> cell phone?
>>>
>>> Yes, hopelessly out of date.
>>>
>>> Thoughts?
>>>
>>>
>>> Skip
>>> cardinalnsb@aol.com <mailto:cardinalnsb@aol.com>
>>>
>>>
>>
>>
>>
>
Message 5
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|
As noted earlier, by another poster, you can google this device and get a m
anual and a youtube video. It appears that the output is not just open rel
ay contacts, but it supplies power, so don=99t put a switch across it
. You could take the output to a 12V relay and then use the relay contacts
, parallel with a toggle switch, to turn on the fan, as I had suggested in
a previous post. There are other solutions, but this is a simple addition
of a relay and a switch.
Roger
From: Carlos Trigo
Sent: Saturday, March 10, 2018 3:55 AM
Subject: Re: AeroElectric-List: Defrost switch
Roger
I am using the XH-W3001 that you can see in my previous post to Ren=C3=A9.
It has a small contactor (relay) which serves as the thermostat switch.
Again, if I parallel the manual defrost switch with the thermostat, my fear
is what will happen when I turn on the manual switch when the thermostat c
ontactor is closed.
Carlos
Enviado do meu iPhone
No dia 09/03/2018, =C3-s 23:54, Roger <rnjcurtis@charter.net> escreveu:
A simple bimetal switch is all you need as a thermostat.=C2- It consists
of a bimetal strip which deforms as it is heated and closes the switch cont
acts.=C2- I am not aware of any thermostat that would be harmed by parall
eling it with a switch.=C2- What thermostat are you using?
=C2-
Roger
=C2-
From: Carlos Trigo
Sent: Friday, March 9, 2018 6:27 PM
Subject: Re: AeroElectric-List: Defrost switch
=C2-
Thanks Roger
=C2-
My only fear is (was?) that when I turn on the defrost switch, it would rui
n something inside the thermostat.
=C2-
Enviado do meu iPhone
No dia 09/03/2018, =C3-s 23:02, Roger <rnjcurtis@charter.net> escreveu:
Carlos,
=C2-
Just wire the thermostat switch and the defrost switch in parallel.=C3=82
=C2- When the electronics temperature is high the thermostat will turn on
the fan, no matter the position of the defrost switch.=C3=82=C2- Also if
you turn on the defrost switch the fan will stay on until you turn it off.
=C3=82=C2- If you have two switches in parallel, either one or both on wi
ll power up the fan.
=C2-
Roger
=C2-
Sent from Mail for Windows 10
=C2-
From: Carlos Trigo
Sent: Friday, March 9, 2018 5:52 PM
Subject: AeroElectric-List: Defrost switch
=C2-
t>
=C2-
In my RV-10 I installed 2 (computer type) cooler fans in the dashboard, wit
h the main purpose of cooling the atmosphere behind the instrument panel to
keep all the panel electronics happy.
Those 2 fans get power through a thermostat, whose temperatures (to turn th
e fans on and off) can be set.
=C2-
Further to this electronics cooling function, and copying other fellow buil
ders idea, this fans may also be used to defrost the windshield interior su
rface.
But for this defrost function, I want to be able to turn On the fans indepe
ndently of the thermostat, so I decided to put a switch for this.
=C2-
Now comes the question: how do I wire this switch in relation with the ther
mostat circuit?
Do I have to use a diode?
=C2-
Thanks in advance
Carlos
=C2-
=C2-
=C2-
=C2-
=C2-
=C2-
=C2-
Message 6
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Subject: | Re: Defrost switch |
I find no need or interest In a defrost switch or fan thermostat in my RV10.
My opinion is that you will want the fan on all the time either way, so mi
ne come on with the master. In the summer you=99ll want to exhaust th
e heat from avionics as best you can, and in the winter you=99ll want c
onstant defrost. There is no reason to even put a switch on them. I prefer t
o have them come on with the master because it is the best reminder that you
left the master on in the first place. On my first plane I did that. On m
y second I was temporarily hit with stupidity and did not have it on the rig
ht bus and ended up completely killing 2 batteries during the first year by f
orgetting to turn off the master during database maintenance on the EFISs
=99.
Once i killed the second battery I fixed that issue and now if I forget I ha
ve an audible reminder to turn off the darn switch and don=99t forget a
nymore.
But really, there is no time you will ever not want fans. Think about it...
do you EVER want hear buildup under the panel? Even in the winter my avioni
cs need cooling because it=99s well over 90F under the panel when the h
eat is turned on.
Keep it simple.
Tim
> On Mar 10, 2018, at 7:56 AM, Roger <rnjcurtis@charter.net> wrote:
>
> As noted earlier, by another poster, you can google this device and get a m
anual and a youtube video. It appears that the output is not just open rela
y contacts, but it supplies power, so don=99t put a switch across it.
You could take the output to a 12V relay and then use the relay contacts, p
arallel with a toggle switch, to turn on the fan, as I had suggested in a p
revious post. There are other solutions, but this is a simple addition of a
relay and a switch.
>
> Roger
>
> From: Carlos Trigo
> Sent: Saturday, March 10, 2018 3:55 AM
> To: aeroelectric-list@matronics.com
> Subject: Re: AeroElectric-List: Defrost switch
>
> Roger
>
> I am using the XH-W3001 that you can see in my previous post to Ren=C3=A9.
>
> It has a small contactor (relay) which serves as the thermostat switch.
> Again, if I parallel the manual defrost switch with the thermostat, my fea
r is what will happen when I turn on the manual switch when the thermostat c
ontactor is closed.
>
> Carlos
>
> Enviado do meu iPhone
>
> No dia 09/03/2018, =C3-s 23:54, Roger <rnjcurtis@charter.net> escreveu:
>
> A simple bimetal switch is all you need as a thermostat. It consists of a
bimetal strip which deforms as it is heated and closes the switch contacts.
I am not aware of any thermostat that would be harmed by paralleling it wi
th a switch. What thermostat are you using?
>
> Roger
>
> From: Carlos Trigo
> Sent: Friday, March 9, 2018 6:27 PM
> To: aeroelectric-list@matronics.com
> Subject: Re: AeroElectric-List: Defrost switch
>
> Thanks Roger
>
> My only fear is (was?) that when I turn on the defrost switch, it would ru
in something inside the thermostat.
>
>
> Enviado do meu iPhone
>
> No dia 09/03/2018, =C3-s 23:02, Roger <rnjcurtis@charter.net> escreveu:
>
> Carlos,
>
> Just wire the thermostat switch and the defrost switch in parallel.=C3=82
When the electronics temperature is high the thermostat will turn on the fa
n, no matter the position of the defrost switch.=C3=82 Also if you turn on t
he defrost switch the fan will stay on until you turn it off.=C3=82 If you h
ave two switches in parallel, either one or both on will power up the fan.
>
> Roger
>
> Sent from Mail for Windows 10
>
> From: Carlos Trigo
> Sent: Friday, March 9, 2018 5:52 PM
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Defrost switch
>
pt>
>
> In my RV-10 I installed 2 (computer type) cooler fans in the dashboard, wi
th the main purpose of cooling the atmosphere behind the instrument panel to
keep all the panel electronics happy.
> Those 2 fans get power through a thermostat, whose temperatures (to turn t
he fans on and off) can be set.
>
> Further to this electronics cooling function, and copying other fellow bui
lders idea, this fans may also be used to defrost the windshield interior su
rface.
> But for this defrost function, I want to be able to turn On the fans indep
endently of the thermostat, so I decided to put a switch for this.
>
> Now comes the question: how do I wire this switch in relation with the the
rmostat circuit?
> Do I have to use a diode?
>
> Thanks in advance
> Carlos
>
>
>
>
>
>
>
>
Message 7
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Subject: | Re: Defrost switch |
I agree Dan. In the RV10 just having two fans does fine for defrost. Flying at
-10F this winter mine had no problem clearing the windshield. The side windows
can be another story.
My first fans were very tiny...maybe 40mm fans and weak. Those didnt work. Get
some high volume 80-120mm fans and it will work well.
Make sure they and the fan grills are black. I even painted or removed the fan
labels because ANY light coloring will reflect on the windscreen.
Tim
> On Mar 10, 2018, at 12:06 AM, Dan Charrois <dan@syz.com> wrote:
>
>
> At the other end of the spectrum, I live in Canada, and did several flights this
winter with temperatures in the -25C to -30C range. I have the same configuration
- just a couple of computer fans mounted in the glare shield, whose purpose
is to blow air from behind the instrument panel, where the air is heated
from the instruments and cabin heat output by the feet.
>
> I can say that at least in my case, it's worked perfectly. If the cabin is kept
reasonably warm through cabin heat, which is what you'd want to do anyway,
it doesn't have any problem keeping the windshield clear in my RV10. The only
case where heated blown air might have helped is during runup and initial taxi
before the engine has gotten warm enough to heat things up sufficiently. But
when underway, the windshield has remained perfectly clear (not the same to
be said of the side windows that didn't have the fans blowing on them - they
tend to get quite icy in those conditions).
>
> One thing working in my favour is our winters are typically exceptionally dry,
so the humidity of the air is very low - with the exception of the humidity
generated by the occupants.
>
> Dan
>
>> On 2018-Mar-09, at 7:05 PM, Rene Felker <rene@felker.com> wrote:
>>
>> The air is heated by the electronics, the cabin heater, and the RV-10 tunnel
heat. Worked every time I needed it..but I do live in a desert
>>
>> From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of A R Goldman
>> Sent: Friday, March 9, 2018 5:01 PM
>> To: aeroelectric-list@matronics.com
>> Subject: Re: AeroElectric-List: Defrost switch
>>
>> So the question that is begged is what will blowing ambient air on a frosted
windscreen do. In your car the defrosted air is heated additionally the air conditioner
compressor is activated (temperature permitting) to reduce moisture.
Your body is constantly creating moisture ( primarily through respiration and
sweating) this condenses on the inside of your windscreen under certain conditions.
Unheated blown air will have little effect. It will have less effect on
ice on the outside. Perhaps a small electric heater will help.
>>
>> Keep cool (warm)
>>
>> Rich
>>
>> Sent from my iPhone
>>
>>> On Mar 9, 2018, at 5:24 PM, Carlos Trigo <trigo@mail.telepac.pt> wrote:
>>>
>>> Thanks Roger
>>>
>>> My only fear is (was?) that when I turn on the defrost switch, it would ruin
something inside the thermostat.
>>>
>>>
>>> Enviado do meu iPhone
>>>
>>> No dia 09/03/2018, s 23:02, Roger <rnjcurtis@charter.net> escreveu:
>>>
>>>> Carlos,
>>>>
>>>> Just wire the thermostat switch and the defrost switch in parallel. When
the electronics temperature is high the thermostat will turn on the fan, no matter
the position of the defrost switch. Also if you turn on the defrost switch
the fan will stay on until you turn it off. If you have two switches in parallel,
either one or both on will power up the fan.
>>>>
>>>> Roger
>>>>
>>>> Sent from Mail for Windows 10
>>>>
>>>> From: Carlos Trigo
>>>> Sent: Friday, March 9, 2018 5:52 PM
>>>> To: aeroelectric-list@matronics.com
>>>> Subject: AeroElectric-List: Defrost switch
>>>>
>>>>
>>>> In my RV-10 I installed 2 (computer type) cooler fans in the dashboard, with
the main purpose of cooling the atmosphere behind the instrument panel to keep
all the panel electronics happy.
>>>> Those 2 fans get power through a thermostat, whose temperatures (to turn the
fans on and off) can be set.
>>>>
>>>> Further to this electronics cooling function, and copying other fellow builders
idea, this fans may also be used to defrost the windshield interior surface.
>>>> But for this defrost function, I want to be able to turn On the fans independently
of the thermostat, so I decided to put a switch for this.
>>>>
>>>> Now comes the question: how do I wire this switch in relation with the thermostat
circuit?
>>>> Do I have to use a diode?
>>>>
>>>> Thanks in advance
>>>> Carlos
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>
> ---
> Dan Charrois
> President, Syzygy Research & Technology
> Phone: 780-961-2213
>
>
>
>
>
Message 8
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Subject: | Re: Defrost switch |
Carlos,
Others have made a good point about leaving the fans run continuously. But if
you want them switched, it should be safe to connect a switch in parallel with
the relay contacts that are internal to the temperature controller.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478551#478551
Message 9
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Subject: | Re: Defrost switch |
So use a DPDT switch. Connect the two heater wires heater to the common contacts,
the manual side contacts to +12V and ground and the other side to the two thermostat
output wires.
If you have it on the manual setting you don't care what the thermostat wants and
it's output is isolated. Setting it to the other side lets the thermostat control
the heater .
Dick Tasker
Carlos Trigo wrote:
> Roger
>
> I am using the XH-W3001 that you can see in my previous post to Ren.
>
> It has a small contactor (relay) which serves as the thermostat switch.
> Again, if I parallel the manual defrost switch with the thermostat, my fear is
what will happen when I turn on the manual switch when the thermostat contactor
is closed.
>
> Carlos
>
> Enviado do meu iPhone
>
> No dia 09/03/2018, s 23:54, Roger <rnjcurtis@charter.net <mailto:rnjcurtis@charter.net>> escreveu:
>
>> A simple bimetal switch is all you need as a thermostat. It consists of a bimetal
strip which deforms as it is heated and closes the switch contacts. I am
not aware of any thermostat that would
>> be harmed by paralleling it with a switch. What thermostat are you using?
>>
>> Roger
>>
>> *From: *Carlos Trigo <mailto:trigo@mail.telepac.pt>
>> *Sent: *Friday, March 9, 2018 6:27 PM
>> *To: *aeroelectric-list@matronics.com <mailto:aeroelectric-list@matronics.com>
>> *Subject: *Re: AeroElectric-List: Defrost switch
>>
>> Thanks Roger
>>
>> My only fear is (was?) that when I turn on the defrost switch, it would ruin
something inside the thermostat.
>>
>> Enviado do meu iPhone
>>
>>
>> No dia 09/03/2018, s 23:02, Roger <rnjcurtis@charter.net <mailto:rnjcurtis@charter.net>> escreveu:
>>
>> Carlos,
>>
>> Just wire the thermostat switch and the defrost switch in parallel. When
the electronics temperature is high the thermostat will turn on the fan, no matter
the position of the defrost
>> switch. Also if you turn on the defrost switch the fan will stay on until
you turn it off. If you have two switches in parallel, either one or both on
will power up the fan.
>>
>> Roger
>>
>> Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
10
>>
>> *From: *Carlos Trigo <mailto:trigo@mail.telepac.pt>
>> *Sent: *Friday, March 9, 2018 5:52 PM
>> *To: *aeroelectric-list@matronics.com <mailto:aeroelectric-list@matronics.com>
>> *Subject: *AeroElectric-List: Defrost switch
>>
>>
>> In my RV-10 I installed 2 (computer type) cooler fans in the dashboard,
with the main purpose of cooling the atmosphere behind the instrument panel to
keep all the panel electronics happy.
>>
>> Those 2 fans get power through a thermostat, whose temperatures (to turn
the fans on and off) can be set.
>>
>> Further to this electronics cooling function, and copying other fellow builders
idea, this fans may also be used to defrost the windshield interior surface.
>>
>> But for this defrost function, I want to be able to turn On the fans independently
of the thermostat, so I decided to put a switch for this.
>>
>> Now comes the question: how do I wire this switch in relation with the thermostat
circuit?
>>
>> Do I have to use a diode?
>>
>> Thanks in advance
>>
>> Carlos
>>
Message 10
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Subject: | Re: Defrost switch |
The manual that you can access on Google specifically warns against this.
See my previous email.
Dick Tasker
user9253 wrote:
>
> Carlos,
> Others have made a good point about leaving the fans run continuously. But if
you want them switched, it should be safe to connect a switch in parallel with
the relay contacts that are internal to the temperature controller.
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=478551#478551
>
>
Message 11
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Subject: | Re: Defrost switch |
Its exactly that Joe
You covered my sudden access of stupidity...
Thanks
Carlos
Enviado do meu iPhone
No dia 10/03/2018, s 14:30, user9253 <fransew@gmail.com> escreveu:
>
> Carlos,
> Others have made a good point about leaving the fans run continuously. But if
you want them switched, it should be safe to connect a switch in parallel with
the relay contacts that are internal to the temperature controller.
>
> --------
> Joe Gores
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=478551#478551
>
>
>
>
>
>
>
>
>
Message 12
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Subject: | Re: Defrost switch |
Dick Tasker, right you are. The manual warns against connecting power to the temperature
controller output. At least I think it says that. It is hard to read
Chinese. LOL Without having the controller circuit board in hand along with
a schematic, an informed decision can not be made. Dick's suggestion about
using a double pole double throw (DPDT) switch is the safe way to wire it.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=478572#478572
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