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Type: Posts; User: smertz

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  1. Replies
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    Thanks for your help. I replaced compressor and...

    Thanks for your help. I replaced compressor and we are back in business.
  2. Replies
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    4,723

    Went back and cleaned condenser with the fine...

    Went back and cleaned condenser with the fine tooth brush. Head pressure dropped from 300 to 200. Then the compressor siezed up. I tried running it backwards and it would not give.

    Any...
  3. Replies
    41
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    4,723

    I'm leaving to go work on it again this...

    I'm leaving to go work on it again this afternoon. First things will be to clean condenser and TXV Screen.

    Would 134A get the evaporator cool enough?\

    Fridge guy was right with the initial...
  4. Replies
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    4,723

    Thank you for replies. KFridge, Yes this is...

    Thank you for replies.

    KFridge,
    Yes this is an old McDonalds that has been converted to a Mexican restaurant. The condensor is six inches thick and was clean until sunday when the hood...
  5. Replies
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    4,723

    Walk in freezer not freezing

    Hope this is easy to solve, I am pulling my hair out and missing something basic.

    Walk in freezer that is 30 plus years old manufactured by Bohn. Compressor is a relatively new copeland...
  6. Replies
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    1,039

    Thanks for your help.

    Thanks for your help.
  7. Replies
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    1,039

    There is no sealing of this unit. Front,...

    There is no sealing of this unit. Front, consists of a glass door with louvered vents at top of bottom that let cold air in.

    Homeowner told me that when unit was installed, the contractor did...
  8. Replies
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    1,039

    Looked at a set of gas logs installed in a new...

    Looked at a set of gas logs installed in a new construction home. The logs were in a factory built fire box intended for them. They are a 22,500 btu with the sign that says, "for decorative...
  9. Replies
    19
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    1,816

    I re read your post after replying and saw that...

    I re read your post after replying and saw that you did put vents in. Good Call. They still may not be enough. There is a relationship between btu's consumed and open air space between furnace and...
  10. Replies
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    1,816

    As we both know, fossil fuels require oxygen to...

    As we both know, fossil fuels require oxygen to burn. If there is not enough oxygen present at the burner the flame will roll back with the uncombusted fuel looking for more oxygen to satisfy...
  11. Replies
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    1,816

    If, by back fire you mean the flame is rolling...

    If, by back fire you mean the flame is rolling out, then you have either to much fuel entering, or more likely, not enough combustion air in the room. Have some louvers on a door been removed or...
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    585

    Needs to slide all the way to the back to allow...

    Needs to slide all the way to the back to allow heat from condensor to be rejected to outside of wall. Right now it might be sucking the heat right back inside.
    Good Luck
  13. Replies
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    Small Office building with two systems. 10 Ton...

    Small Office building with two systems. 10 Ton Trane outdoor units (MN TTA120B400BC) with electric strip heat.

    System number two, Fan always runs. there are 5 zone controllers that feed back to...
  14. Replies
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    2,811

    U value represents resistance to heat...

    U value represents resistance to heat flow/transfer through a given material or composite. It is a sum of the insulating factors around a body. It does not look at the actual heat load placed on...
  15. Thread: HESS TRUCKS

    by smertz
    Replies
    20
    Views
    1,589

    I'll send you $50 plus shipping cost if you...

    I'll send you $50 plus shipping cost if you continue to send good advice!

    (How do you get the smiley symbols, and bold type face in the message?)
    Smertz 540-570-HVAC
  16. Thread: HESS TRUCKS

    by smertz
    Replies
    20
    Views
    1,589

    quite tempting, 1200 still seems a little high,...

    quite tempting, 1200 still seems a little high, would you take a madden'97 EA sports football game in trade?
  17. Thread: HESS TRUCKS

    by smertz
    Replies
    20
    Views
    1,589

    I have been collecting hess trucks since 1972. ...

    I have been collecting hess trucks since 1972. Went to college in 1990. Sister moved back into my parents house with her kids when I left. Trucks all gone. Restarted Collection in 1994, I love...
  18. Replies
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    5,156

    Hearthman, Thanks for your reply, It is very...

    Hearthman,
    Thanks for your reply, It is very helpful.
    Smertz
  19. Replies
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    5,156

    I am a licensed gas fitter. I have been asked to...

    I am a licensed gas fitter. I have been asked to do several gas log installations. Please help me understand what is acceptable practice for gas line and valve placement in this installation.
    ...
  20. Replies
    2
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    658

    Last night I was cleaning condensor and...

    Last night I was cleaning condensor and evaporator coils at an ice cream shop. When I got to the reach in refrigerator, (MN Beverage air- MN:ER 48
    sn.8027365) and tried to remove the evaporator...
  21. Replies
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    5,429

    I am a Chemical Engineer and if this field is...

    I am a Chemical Engineer and if this field is your interest I found my education to be an excellent starting point for developing an understanding of super heat/subcooling fluid mechanics of air and...
  22. Thread: hussman coffin

    by smertz
    Replies
    38
    Views
    3,776

    You probably already did this, but... Make...

    You probably already did this, but...

    Make sure you have enough clearance around your evap. Had a customer whose employees loved to load unit up with food all around evaporator.
    Good luck
  23. Thanks for your replies, I suspected unit was...

    Thanks for your replies, I suspected unit was overcharged but accumulator (on liquid line) between condensor and cap tube was forgiving the error. I did not think cap tubes were normally run with an...
  24. Pizza shop ... Owner calls me up to look at his...

    Pizza shop ...
    Owner calls me up to look at his 1950's reachin refrigerator (with new 2003 condensor w/accumulator on top of unit and cap tube underneath) Evaporator is a block of ice. Defrost...
  25. Replies
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    1,920

    Condensor clean, fins straintened , pressures are...

    Condensor clean, fins straintened , pressures are 75 and 280. Outdoor Ambient is 90. I was thinking a little lower head pressure still? Amps dropped from 23 to 21. Thanks for the ideas.
  26. Replies
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    1,920

    Dirty condensor, yes, makes perfect sense. Wish...

    Dirty condensor, yes, makes perfect sense. Wish I had remembered that at the get go. Hot sun must have fried some brain cell. I will clean and let you know the pressure drop.

    Thanks
  27. Replies
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    1,920

    My first thought was that the unit was...

    My first thought was that the unit was overcharged as well. Hi subcooling and head pressure, however it is right on with the manufacturer's charging chart for this unit which related outdoor db,...
  28. Replies
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    1,920

    A month ago I was called to look at an RTU...

    A month ago I was called to look at an RTU (carrier MN48TJD007521) that was intermittantly tripping the circuit breaker. Unit had a bad condensor fan, which I presumed led to the melted wires on the...
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