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  1. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Message received from Guyfang " You have posted this same problem in two threads. Not supposed to do that. I am going to delete this thread, and you can go back to the other thread, with answers to your request for a TM, and try and work out your heater problem there. " My previous problems...
  2. I

    H82 Heater Manual? Not getting Voltage to L1 Solenoid

    Can anyone provide a link to the H82 Technical Manual? Pretty sure it used to be on this site, but I can't seem to find it now. I'm trying to get an H82 heater running but cannot seem to get voltage to the L1 solenoid. I've swapped out master power switch because it was janky and not going tp 3...
  3. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    I apologize for the delay in responding to this thread. I replaced the type A nozzle with a type W (original style) nozzle, reinstalled the original flame detector, and added a brass tube to the flame detector, copying the H82 design, and its been working fine ever since. My gut feeling is the...
  4. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Plexiglass burner cover installed, light is hitting flame detector, not as bright as I expected, but no frame of reference to say how bright it should be, or a way to measure. Jumpers installed to eliminate factory wiring and connectors, no difference, 20 seconds of burn and K8 trips. So...
  5. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Flame detector re-installed, tweaked position again just for good measure, approx 20 seconds of fire, and K8 relay trips. Re-test while checking continuity of the thermal switch (S2 in schematic), it never loses continuity, K8 still trips. Plexiglass viewport is next step, once I can verify...
  6. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Update: Flame detector is either dead, or not seeing flame, I'm leaning towards dead, but nozzle and flame detector going bad in same event has me questioning. For testing flame detector F1 and F2 connection has to be open for the unit to fire, after it fires F1 and F2 need to be shorted. I...
  7. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Burner pulled from H82, its different, close, but not exact. Fireye is the same, and this one has a part# 956 made by White Rogers, they call it a "flame detector". Which terminals should be jumped on relay? I know I had that relay out 20?? years ago, have not fiddled with it since, the panel...
  8. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Thanks, I have that manual already, the H82/83 were clearly built on the same basic platform as the H81, but there are some subtle differences, just not sure how many. I cannot find the rectifier mentioned in post# 193, and the hour meter operates in 110vac, so that is one difference. Fuel...
  9. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Anyone ever make a plexiglass/polycarbonate cover for the burner so you can see if the light is hitting the fire eye? Obviously could only be used temporarily. I've adjusted it twice now and its still doing the same thing, burner lights, runs for 20 seconds, then the K8 relay trips and shuts off...
  10. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    New nozzle installed, burner lights, runs 20 seconds, and the red light comes on/solenoid closes. I'll fiddle with fire-eye again, never been happy with the way its setup, there are 3 holes the light has to go thru and they are not perfectly lined up, no tube like on the H82/3 models, one of...
  11. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    NSN 4520-01-253-4865EJ , the EJ looks unusual, but clear as day on the tag, and no space between it and numbers. Contract# F09603-86-C-1522 , what I'm pretty sure is a 1 has a scratch thru it, if not a 1 maybe a 4 or 7, but think 1 is correct. Thank you for your time and assistance! Edit...
  12. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Where would I find the TM number, don't see it on data tag, but there is an NSN and contract # ?
  13. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    The heater is inside, an all concrete room, its wicked cold in there but that is also where water line comes into building and the pipes don't freeze, and the day it quit working room was nice and warm inside, at least the air was. On the H81 there is NO replaceable filter element, its a whole...
  14. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Looking at manual page 3-16.3 Heater Fails To Operate, it says to check for failure of R1 rectifier and TT meter. Where is R1 rectifier on the H81? Has anyone ever found the H81 manual, I find slight differences not shown in H82/83 manual. Edit: I cannot find a rectifier, and hour meter...
  15. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    I did put fuel in it Saturday morning, hour or 2 before the problems started, was questioning if maybe I had purchased gasoline by mistake. Fuel can was still right next to heater last night so checked, does not smell like gasoline, feels oily, and would not light off like gasoline with a flame...
  16. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    I honestly don't know if they do a winter blend here, we hit a new low for a specific day here a few weeks ago -21, so it would not surprise me. Does algae grow in cold diesel? I ran most of the old diesel out in the first 2 days, the filter is one of the "self cleaning" type where you twist...
  17. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    It is back together, and no joy. It just sputters and chuffs, I can see a nice hot arc on the ignitors with just the fan on but can tell its not lit by holding my hand over viewing port. I did clean viewing port too, after 3 no-starts it had an oil mist so cleaned again. I'll see if I can get...
  18. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    No power losses while operating, and let fan run for 2-3 minutes after turning burner off. Put a new filter on it in 2019, and as stated above less than 50 gallons of diesel thru it since then. Exhaust was lengthened by 16" this year, and that extension is .200 smaller diameter, could not find...
  19. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Long time without posting in this thread. Used the heater intermittently back in 2019, then it sat unused for several years. I moved it to center of the shop this year, added a duct system to blow air to both ends of shop, then fired it up again. Got 3 days of running 8 hours per day, then it...
  20. I

    Its cold outside lets talk Heaters, H81, H82, H83, etc.

    Viewing window is clean, not sure I said it was dirty, flame sensor was dirty/oily, viewing window is just difficult to get to.
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