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Ultra Boiler Power Interrupt Hard Lockout

Tombig_8 Member Posts: 15
Hi all, it's been awhile since I posted. I know this has been discussed before but most posts were pretty old and thought I'd tap into some new brain power.

Owner of series 2 Ultra will be spending a lot of time away this winter. This boiler goes into hard lockout after minimal power outage and needs to be reset. I understand W-M has fixed this on newer models. I've got an e-mail to W-M tech support but thought I'd toss it out here.

Most power outages around here don't last long and he's not as concerned about running the system for any length of time. Really all I need to provide for is the control module or that and the primary pump (120V to boiler). Any suggestions?

While I'm at it, what about a web or phone based low temp alert? Maybe the alarm company can provide this.

Thanks in advance, Tom Goebig (Tombig)   Delta-T Mechanical



  • Jamie Hall
    Jamie Hall Member Posts: 22,928
    How long is long?

    If he doesn't need to run the burner during a power failure, can you wire the system so that the control module is powered through a UPS, but not the rest of the system?  That might keep the thing from going into lockout, although it would be a frustrated puppy as it would say go and the rest of the system would just sit there until the lights came back on...  Not sure how the Ultra 2 is wired, so I can't say for sure if that would work out.

    Most alarm companies I've run into have a low temperature alert as one of the optional alarms...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • eluv8
    eluv8 Member Posts: 174
    Ultra Lockouts

    The series 2 Ultra had some pretty serious problems with power stability and lockouts with the  MCBA control. The manufacture of the control has negotiated a deal with Weil Mclain to supply a little metal box with some parts in it to wire in to the electrical circuit of the boiler to resolve the problem. Ask your local Weil Mclain supplier or representative. They probably still have a couple on the shelf.
  • Tombig_8
    Tombig_8 Member Posts: 15
    edited November 2009
    Time Delay Relay?

    I believe the part you're referring to is a time delay relay which will prevent power spikes damaging the electronics when power is restored after an outage. A very good idea and I will install the WM recommended part. I got a response from WM tech support regarding the relay. Still wondering if the customer will need an uninterupted power supply. I wonder if the MCBA gives E04 error hard lockout due to extended power loss or voltage spike upon restoration. I'll try to talk to tech support tomorrow and I'll post my findings.
  • eluv8
    eluv8 Member Posts: 174
    time delay relay

    yep, thats it. I couldnt remember for sure what it was called, until later and figured you would find it anyhow. Tech support or local support should be able to give you final answers. I have given away several but have no experience with actual install. Feedback I have heard has been positive after the relay has been installed.
  • Tombig_8
    Tombig_8 Member Posts: 15
    Answer from WM

    According to WM the E04 error is due to the voltage spike at power restoration rather than the duration of the outage. The time delay relay should do the job.
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