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  1. #40
    Join Date
    Oct 2010
    Location
    Canada
    Posts
    2

    Exclamation

    Any SLP98V furnace manafactured on or after 09.01.10 has a redesigned collector box which had corrected the issue. Modified collector boxes are available to Lennox dealers for previously manafactured units that may be experiencing draining issues. This is the real story.

  2. #41
    Join Date
    Jul 2006
    Posts
    90
    Regarding the Lennox SLP98V, the company I work for also has installed some of these, and we've experienced trouble as well. We think we have found a solution to the "pressure switch" fault. It turns out that if the condensate trap was put on the left side, the header box won't drain properly. The solution is to either move the trap to the right side, or just jack up the right front of the furnace about 3/8" and sum it with some S-cleat so it drains better. Also, some of the traps shipped in the green bag had a Marrette get stuck in them, so they won't drain. Check this on your traps. Make sure the vent on the top of the trap sticks up a good 2" or more above the inlet from the collector box. We did this on one we were fighting with, and it seems to have solved it. I definitely remember the E225, 227, and the rest. We were sure it was venting at first, too, because we had 3" vent with 7 90s, and about a 35-foot straight run (the book says you can go 88 feet total equivalent length).

    Hope this helps!

  3. #42
    Join Date
    Jun 2006
    Location
    Michigan
    Posts
    962
    Quote Originally Posted by airbyger View Post
    Any SLP98V furnace manafactured on or after 09.01.10 has a redesigned collector box which had corrected the issue. Modified collector boxes are available to Lennox dealers for previously manafactured units that may be experiencing draining issues. This is the real story.
    Then why are you blaming improper installation in your other post? We have 2 in the past week that wouldn't work and yes they were installed according to the instructions. One we had to change the drain to the other side to get it to work, the other, a downflow, tech support had us replace the collector box, ventor motor, pressure switch and trap, pitch it more and just got another call today, still won't drain. These are not installation issues.
    Local distributor has several sitting in the warehouse that have been returned.

  4. #43
    Join Date
    Aug 2010
    Location
    lake zurich, il
    Posts
    27
    Yikes! I have a slp98/110K + Icomfort + 13ACX installed with a left hand drain. Been in about 1 month. Have not needed the furnace much yet so I dont think I have seen the drain issue (yet). The Icomfort just died though (keeps resetting all the time). The furnace is installed perfectly level. Im wondering if I'm just a good cold snap away from a drainage issue. Any way to test this issue. Maybe I could put it in high heat test mode (once I get a working IComfort again) and just let the furnace crank a while. Any thoughts? Also I read that Lennox will be upgrading the IComfort firmware to include a wireless access option. Anybody hear about this?

  5. #44
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,753
    Haven't had to personally diagnose this problem yet, so don't jump all over me if these suggestions have been attempted already. Possibly (for up or downflow only), you can tee together the left and right side drain ports at the bottom of the cold header, instead of using a plug on the side opposite the drain. Also, pitch the unit forward 1/2"(back to front), and don't tie into the evaporator drain, as these are both described in the install manual. Have any of you, having this issue, taken pressure port differential readings, if so, can you share your info as it discovered.

  6. #45
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,753
    Are these problems with the UHV or DFV or both?
    Is the drain the problem or is the draft housing collecting water and restricting the draft motor wheel speed? I remember replacing the G51 or G32 (I think) draft assembly kit. It came with instructions to drill a drain port in the bottom of the housing, where there is a blank tube port. That drain was routed and teed with the cold header drain.
    Last edited by mgenius33; 10-24-2010 at 04:09 PM.

  7. #46
    Join Date
    Jun 2006
    Location
    Michigan
    Posts
    962
    Quote Originally Posted by mgenius33 View Post
    Are these problems with the UHV or DFV or both?
    Is the drain the problem or is the draft housing collecting water and restricting the draft motor wheel speed? I remember replacing the G51 or G32 (I think) draft assembly kit. It came with instructions to drill a drain port in the bottom of the housing, where there is a blank tube port. That drain was routed and teed with the cold header drain.
    The bulletin says it's for upflow left hand drains, but we had a downflow with a right hand drain that had a problem, which makes sense i guess because it's all reversed on the downflow. The bulletin says to use a threaded 90 out of the collector box, switch it to he other side if possible, and if that doesn't work, order a new collector box. Apparently the problem only occurs in high fire.

  8. #47
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,753
    Thanks for the reply. I'm curious and want to learn the proper correction to this problem. I hope all the Lennox guys keep relaying the info back here to the others. We have not yet had much need for heat here this season. I'm sure when we have a call it will be after hours, and the tech will be tired, and very frustrated. We have not yet received a bulletin on this. I haven't seen anything on Davenet either.

  9. #48
    Join Date
    Jun 2006
    Location
    Michigan
    Posts
    962
    Quote Originally Posted by mgenius33 View Post
    Thanks for the reply. I'm curious and want to learn the proper correction to this problem. I hope all the Lennox guys keep relaying the info back here to the others. We have not yet had much need for heat here this season. I'm sure when we have a call it will be after hours, and the tech will be tired, and very frustrated. We have not yet received a bulletin on this. I haven't seen anything on Davenet either.
    Go to Products, Service and App notes, gas units, then scroll down to SLP98.

    It'd be nice if we got some kind of notification of new bulletins when they come out. Would have made it a little easier to deal with the problems if we had some warning.

  10. #49
    Join Date
    Sep 2008
    Location
    VA
    Posts
    1,753
    Yep, there it is clear as day. I must have overlooked it. Thanks

  11. #50
    Join Date
    Sep 2010
    Location
    Chicago, IL
    Posts
    50
    I had the SLP98 installed 3 weeks ago, and the furnace has not really been needed as yet (I have heat coming up for the downstairs neighbors) until now.

    Last night my stat emailed me that I have a heating issue. Had the service guy come in and he found an error code of E228 (Unable to perform successful pressure switch calibration).

    I found this post which describes the problem, and yes we have the condensate trap was put on the left side (can't put it on the right), and the unit is installed level.

    The manufacture date on the unit is 8/2010, so before when the issue was resolved.

    The service guy is going to shorten the section of PVC coming out of the left side drain, as currently the pipe runs 2" before the 90 degree downward turn.

    Will this work? or is this a band aid as they can't jack up the right front side of the system post install?

    Thanks in Advance for your advise.

  12. #51
    Join Date
    Sep 2010
    Location
    Chicago, IL
    Posts
    50
    Here is the bulletin (H-10-1) attached.

    AL
    Attached Images Attached Images

  13. #52
    Join Date
    May 2008
    Location
    Missouri
    Posts
    3,425
    Wow, this seems to be more of the Lennox tried and true "in depth" testing of any and all their units BEFORE they are sold to the public. Sorry, just had to throw that one out there. Tipping the furnace?? Really now. Did the customer agree to be the "field tester"?? I doubt it.

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