plevyakh
Joined: 10 Jan 2011
Posts: 39
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 Posted: Thu Feb 17, 2011 6:07 am Post subject: Wiring diagram question for Pitot Heat On indicator light |
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Guys,
I'm using Bob's pitot heat.pdf schematic as the base for a "Pitot Heat ON" amber LED light on my annunicator / warning light panel.
http://www.aeroelectric.com/PPS/DeIce/Pitot_Heat.pdf
In comparing this schematic to his article titled "Failure Detection and Annunciation I notice a few differences in the two schematics.
http://www.aeroelectric.com/articles/Failure_Detection_and_Annunciation.pdf
Questions:
1. In pitot_heat.pdf the relay is positioned just before the Pitot heater load and after the Reed switch sensor, vs in the second article the relay is positioned BEFORE the Reed switch sensor. Does it matter?
2. The Reed switch current sensor wire layout is different in the two articles. For example, the LED light wire is after the resistor in one, -vs- the LED wire is after the Radio Shack 275-232 reed relay in the second article. Does it matter?
3. Does anyone have a picture to share on how they boxed up and made flight worthy the Reed Switch Current Sensor?
4. Why is an 18AWG fuselink used at the Main Bus on the pitot heat.pdf schematic? Shouldn't this be a 15amp fuse instead at the bus?
Thanks for any help here,
Howard
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| Description: |
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Download |
| Filename: |
Pitot_Heat.pdf |
| Filesize: |
78.65 KB |
| Downloaded: |
342 Time(s) |
| Description: |
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Download |
| Filename: |
Failure_Detection_and_Annunciation.pdf |
| Filesize: |
686.68 KB |
| Downloaded: |
330 Time(s) |
_________________
Howard Plevyak
GlaStar / Cincinnati, Ohio |
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