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Janitrol user manual

Old 06-25-2012, 04:37 AM
  #11  
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The thermocouple is suppressed during heater ignition, and when that stops it shuts off the fuel flow if heater ignition should fail. I have never seen a checklist that called for cabin heat before engine start, but I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater.
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Old 06-25-2012, 06:53 AM
  #12  
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Originally Posted by Cubdriver
The thermocouple is suppressed during heater ignition, and when that stops it shuts off the fuel flow if heater ignition should fail. I have never seen a checklist that called for cabin heat before engine start, but I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater.
Ahh, that makes sense. Also, I should clarify - the checklist didn't call for it, but back in the day we used to plug in a power cart and run the Janitrol sort of like a mini-apu to preheat the cabin in the 411 before the pax arrived.

I'm again confused by this though: "I suppose if one engine quits and then starts dribbling fuel it could get ignited anywhere such as at the heater."

Huh?
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Old 06-25-2012, 10:15 AM
  #13  
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A running engine isn't going to drip as much but I guess it could. Would probably catch on fire all by itself if that happens. Any fuel leak is a fire hazard obviously. I do not think I would preheat a light twin cabin using a Janitrol like that, but if you did it then it must have worked out ok.
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Old 06-25-2012, 10:17 AM
  #14  
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I've not known of one (or a Southwind, for that matter) to be wired through, say, and oil pressure switch. They'd all fire up with just the master on, if that's what you wanted. This is on Seneca IIs, PA30s, and Aztecs (and one Jeep). Overall I found them very reliable.

Goodman now owns the Janitrol name; there's no mention of it on their website that I can find. Stewart-Warner still mentions combustion heaters; OP might contact them for a manual. The Southwind operated similarly to the Janitrol, IIRC.
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Old 06-25-2012, 10:24 AM
  #15  
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There's the electric fan that's part of it, not sure if it matters.
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Old 06-25-2012, 03:31 PM
  #16  
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Originally Posted by Cubdriver
A running engine isn't going to drip as much but I guess it could. Would probably catch on fire all by itself if that happens. Any fuel leak is a fire hazard obviously. I do not think I would preheat a light twin cabin using a Janitrol like that, but if you did it then it must have worked out ok.
In retrospect I'm not certain it was the wisest thing to do, but it did work. Someone was always sitting in the a/c, so we did have that going for us, and functionally I don't think there's much difference between operating it in that fashion and doing so whist taxiing (no significant amount of ram air flow).
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Old 06-25-2012, 06:49 PM
  #17  
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thanks to all of you; lot's of great info!
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