Ohio New issue - E-4 low water temp common issue...

Discussion in 'Maintenance and Troubleshooting' started by don c, Feb 11, 2016.

  1. don c

    don c New Member

    well I guess I jinxed myself with the mystery antifreeze / system check up thread.

    I woke up today to a low temp fault on this unit.

    *** important note *** I recently ( last month and I believe I have not had low outdoor temp since install) had a new climatemaster programmable thermostat installed under warranty. My old themo - ( 2 years old) would loose all stored data whenever the power would go out.

    This is the exact same thermostat I had before ( of course with updated sorftware or battery to resolve the mentioned issue) I can post the model # when I get home - but this is the popular climatemaster brand unit.

    Since I have never had a low temp fault before - is it possible that there is a setting that was done incorrect by the installer ? I have read for instance, that the Delta T can be adjusted to allow more flow past the condensor / heat exchanger to help reduce the possibility of frost build up ?

    Another observation I noticed is that a LAT thermo that I have on a vent in the living room was showing just a bit higher temp ( 90 degrees vs a more common 88 degrees) which I thought was unusual for the 12 degree outdoor temp we are having currently. House is set at 68

    I now wonder if that may have indicated a slow flow rate thru the system ( longer exposure of coolant than should be ) .... sorry if I am going down a wrong path on this one... but thought the higher vent temp ( very unusual for my stage 2 heating to hit 90) was worth mentioning.


    in summary:

    could the new thermostat have had a setting or two incorrectly adjusted for my system ?

    The system is a 4 ton 2 stage tranquility closed pond loop.

    Has been running for 2 1/2 years with out issue.

    I am running marginal on antifreeze ( possible 24 degree protect ) per a previous post

    Last year running 31 EWT and 26.5 LWT ( have not yet checked this year )

    Looking to see if I should check the Delta T setting ( and I need the procedure to do so ) or any other setting that could cause the new fault to appear.

    Thanks a bunch !

    Don in Ohio
     
  2. Mark Custis

    Mark Custis Not soon. Industry Professional Forum Leader

    Don:

    Your guessing instead of measuring is liable to cause tinkering, and that can cause frozen people and pipes.

    Get tools and learn how to use them or call a pro.

    I would be happy to help and I do not charge extra for weekends.

    Mark
     
  3. don c

    don c New Member

    Hi Mark

    Thanks for the reply. I do have the installing company coming out tomorrow - just thought maybe the Delta was an easy area to take a look at - especially if that is an item that is typically changed in value with a system set-up like mine .... may have been worth a look.

    As mentioned - thermostat was replaced recently ... unit is a Climatemaster ATP32U03/4 and I know there is several installer set functions that can cause issues if input is incorrect.

    If they have trouble tomorrow identifying the issue I'll let you know - thanks for the offer.

    don
     
  4. Mark Custis

    Mark Custis Not soon. Industry Professional Forum Leader

    I learned early on not to be what was then known as a tube tapper. They would come out to fix your vacuum tube what ever. They would tap one tube at a time until something changed. Replace that tube and start over.

    I bring real world test stuff.

    Mark
     
  5. don c

    don c New Member

    **** update on the lower water temp fault ***

    my 2 - 1/2 year old B&D pump station with low pressure Grundfos pumps had a pump failure. system is up and running well at this time. Pump is covered under warranty.

    The new pump has what looks to be an adjustible setting for " Low Med High" - which installer set to the high position .... Does anyone know the reasoning for or circumstances where the setting should be changed ?

    Thanks as always for info and advice

    Don
     
  6. docjenser

    docjenser Well-Known Member Industry Professional Forum Leader

    Do you have 1 or 2 circulation pumps? I assume 2. You might be able to set it to a lower setting if you have enough flow. It might be that the pump is set to match the speed of the other pump. Any idea what your delta t (difference between incoming and outgoing water temperature) is?
     
  7. don c

    don c New Member

    Hi Doc - info as requested :

    this is the 2 pump system . I have not checked the delta with the new pump.... will check and update tonite, however last year I had EWT 31.5 and LWT about 26.5 in January.

    I do notice that the LAT at the vent I normally check was down a couple of degrees .... which does beg the question of flow rate ...

    I believe I read that Delta normal recommendation in the range of 5-7 degrees. This is a climatemaster 4 ton system with the low pressure B&D 2 pump system. I was getting apprx 22 - 24 degrees over ambient from the vent in the past ... last night after pump install was about 20-21 degrees.

    Can you supply what would be typical #'s for the delta and is it just a matter of moving the switch on the side of the pump to another setting - looks like just a flat blade to rotate the position of the switch.

    Also what to look for in delta if I were to change the pump to the medium setting.... ?

    Thanks
     
  8. Stickman

    Stickman Active Member Forum Leader

    I've got a 4 ton tranquility 27 split and a single 26-99 3-speed pump like your new one. I had the same thoughts on which setting (lo-med-hi) was best. Honestly, I still don't know. However, the attached is what I found that does provide some performance specs (for my equipment) related to this. I found it in the ClimateMaster Product Catalog. Maybe you can find it for your exact model on the CM site?
     

    Attached Files:

  9. don c

    don c New Member

    additional data -

    Measured EWT 34.8 LWT 29.3 today w/ a bit warmer weather in ohio - outside temp about 28 degrees right now.

    How does the delta of 5.5 sound for this system ?
     
  10. Mark Custis

    Mark Custis Not soon. Industry Professional Forum Leader

    Yes. 4 to 6.
     
  11. docjenser

    docjenser Well-Known Member Industry Professional Forum Leader

    Assuming that your refrigerant circuit is OK, which it seems, around 5 degree delta T is a good number.
     

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