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Thread: Navien CH180 2 second burn on/off

  1. #16
    DIY Junior Member Stephen C's Avatar
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    Do not know if corruption is the real cause.
    Last edited by Stephen C; 02-24-2014 at 04:55 PM.

  2. #17
    DIY Junior Member Stephen C's Avatar
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    I will use a timer you would use to turn house lights on off . It will be be programmed off 10 min . for every 3 hours 24/7 . A thermostat connected in parallel will hold power on always if boiler room is above 55F. Power will only shut down for 10 min. if room is abnormally cold as a backup reset action .
    In my day job , I go around installing caps on solenoids which cause transient spikes that corrupt micros in industrial machines . I will not modify anything in the boiler for legal reasons but I will plug the power cord into a surge suppressor and set up my power cord backup 10 min. power off reset system .

  3. #18
    Jack of all trades DonL's Avatar
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    I am not sure if corruption is the cause on your unit.

    I have seen it on a lot of controller electronics that does not have battery backup.

    During Cold weather the power company may switch power sources to meet demand, and that does cause power Glitches.

    What you plan to do would be a easy solution.

    It would be best to use a timer with a ground connection.

    As for spikes from solenoids / relays, If they are DC they should have a Diode across the winding also.


    Good Luck.
    Theory only works perfect in a vacuum.

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  4. #19
    DIY Junior Member MikeG88's Avatar
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    My new burner rod was installed and it seemed to run fine while the plumber was here, but later it started acting up again. Maybe it's my imagination but I did notice that if the burner has not run for a longer length of time- it starts up easier? I have the high temp board so it should not be a case of it stopping because the return is too high (they had me have that installed previously for that possible reason), or maybe it starts up with out hesitation because it goes right to high fire because the water has gotten cold? That may play into how some have reported less mis-firing on DHW -which I assume goes to high fire pretty quick?

    I Installed a whole house surge protector before the new board was installed- I had been worried maybe a spike had damage the original board or was causing the problem.

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