Results 1 to 13 of 13
  1. #1
    Join Date
    Mar 2007
    Posts
    3,103

    Centrifugal Chiller Rebuild

    Re-gasketing a 1984 Trane CVHE032 with the original UCP1 controls. We're doing an economizer flange upgrade on this thing, too. As you can see from the 1st and 3rd pictures, there's not much room to work in this place, and the whole ceiling is covered in that awful spray-on fireproofing material. I'll post more pictures as the job progresses.

    Name:  0807120949a.jpg
Views: 767
Size:  33.0 KB
    Name:  0807120952b.jpg
Views: 707
Size:  31.8 KB
    Name:  0807121350a.jpg
Views: 723
Size:  40.0 KB
    Name:  0808121634a.jpg
Views: 698
Size:  37.3 KB
    Name:  0807121512a.jpg
Views: 695
Size:  33.2 KB
    Name:  0808121601a.jpg
Views: 674
Size:  42.3 KB
    Name:  0808121601b.jpg
Views: 689
Size:  41.6 KB
    Last edited by Tech Rob; 08-09-2012 at 08:28 PM.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  2. #2
    Join Date
    Jul 2006
    Location
    Anytown USA
    Posts
    2,055
    Cool pictures, thanks for sharing..

  3. #3
    Join Date
    Aug 2009
    Location
    Prattville, Alabama
    Posts
    1,979
    I thought it was still Classic Black panel in 1984. Like on the chiller next to it in the last pic. Anyhoo, thanks for sharing.

  4. #4
    Join Date
    Mar 2007
    Posts
    3,103
    Quote Originally Posted by y7turbo View Post
    Cool pictures, thanks for sharing..
    Quote Originally Posted by Nuclrchiller View Post
    I thought it was still Classic Black panel in 1984. Like on the chiller next to it in the last pic. Anyhoo, thanks for sharing.
    1984 was still the classic black panel, which I refer to as UCP1. A lot of people call the one that came after it UCP1, though.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  5. #5
    Join Date
    Mar 2007
    Posts
    3,103
    This one had the motor replaced recently.

    Name:  0705121350b.jpg
Views: 400
Size:  36.4 KB
    Name:  0705121350a.jpg
Views: 413
Size:  35.2 KB
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  6. #6
    Join Date
    Apr 2011
    Location
    Coastal Maine
    Posts
    808
    Great Pics. Don't you love how they never give you enough room to work in the chiller house and boiler rooms. Darn Architects always shave space in the mechanical spaces.

    Good work.

  7. #7
    Join Date
    Mar 2007
    Posts
    3,103
    What's really sad is that they had no good reason to here. These chillers are up in a penthouse on the roof. The building is 12 stories tall. Another 6 inches would not have killed them. C'est la vie. Having to transfer each piece twice just to get them off of the chiller makes for an interesting job.

    I wasn't in on the motor replacement job, but those guys did a pretty good job with it, considering the inherent difficulty of the site.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  8. #8
    Join Date
    Aug 2012
    Location
    FL
    Posts
    18
    Looks like a good job. Did the motor burned up or is just inboard bearing replacement?

  9. #9
    Join Date
    Mar 2007
    Posts
    3,103
    The one that I'm working on right now had leaks all over the place. Got in there and found the journal bearing oil seal needed to be replaced anyway.

    The chiller in the 2nd set of pictures had a burnt motor.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  10. #10
    Join Date
    Mar 2007
    Posts
    3,103
    Update: My camera phone broke, so no more pictures

    Got everything put back together now. Did an air-run on the machine with the suction elbow off. Final leak test, then I put the machine on a vacuum and pulled it down to 300 microns in a matter of a few hours. Turned off the pump, going back tomorrow to check if the vacuum rises. If not, I'll start charging 550 lbs. of R-11 and repair the insulation I had to take off. Almost there!
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

  11. #11
    Join Date
    Aug 2012
    Location
    FL
    Posts
    18
    Good deal!

  12. #12
    Join Date
    Apr 2004
    Location
    Winnipeg,MB,Canada
    Posts
    92
    Cool pix. How did the flange change out go? Gotta love tight spaces.

  13. #13
    Join Date
    Mar 2007
    Posts
    3,103
    Went very nicely. Drop the economizer, measure and cut the old flanges off, bevel the pipes, tack the new ones on, put the econo back up with the old gaskets to check the fit, then take it back down and do all the welding. The new evap flanges welds right on top of the existing flange. The new flanges are much thicker and have a pipe extension to keep the heat of the weld away from the flange. The gasket is like a paper gasket with a bead of silicone around it, the bolts are bigger and there are more of them. Both of the flanges are tapped now, so there are no more nuts and lock-washers. Looks like this is the ultimate fix for this problem.
    "There is no greater inequality than the equal treatment of unequals."

    -Thomas Jefferson

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event