Results 1 to 3 of 3
  1. 10-04-2011, 12:47 PM #1
    mechforlife
    mechforlife is offline Regular Guest
    Join Date
    Oct 2005
    Location
    los angeles calif
    Posts
    41
    Post Likes

    herman nelson unit ventilator 1981

    does anyone have a wiring diagram for a old mcquay unit ventilator, model SPMAJBBBSG 3013-8200. ive purchased a new speed transormers and motors from DMG CORP, but i have no wiring diagrams no literature of any kind not even with the new parts. TRANSFORMER PART NUMBER IS 4EPB7716.
    Reply With Quote Reply With Quote
  2. 10-05-2011, 11:24 PM #2
    Cooked's Avatar
    Cooked
    Cooked is offline Professional Member*
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Post Likes
    The old McQuay unit vents came in many different flavors, a 500 cfm, 750, 1000, 1250 and 1500 and a 2000 cfm ceiling mount horizontal model. They also came in a wide array of heat/cool and economizer options. I can't make heads or tails of the model no. Do you have any idea which specific unit you have? They are easily identified by the cabinet length and number of fans. If memory serves they had a transformer that sometimes had 10 or 15 different speed taps.

    I might be able to point you in the right direction to find a generic diagram for your unit.
    The picture in my avatar is of the Houston Ship Channel and was taken from my backyard. I like to sit outside and slap mosquitos while watching countless supertankers, barges and cargo ships of every shape and size carry all sorts of deadly toxins to and fro. It's really beautiful at times.....just don't eat the three eyed fish....

    ¯`·.¸¸ .·´¯`· .¸>÷÷(((°>

    `·.¸¸..· ´¯`·.¸ ¸.·´¯` ·.¸>÷÷(((°>

    .·´¯`· .¸>÷÷(((°>

    LMAOSHMSFOAIDMT
    Reply With Quote Reply With Quote
  3. 10-06-2011, 08:09 AM #3
    Control Man's Avatar
    Control Man
    Control Man is offline Professional Member
    Join Date
    Jul 2001
    Location
    Canada
    Posts
    1,913
    Post Likes
    McQuay was not involved with HERMAN NELSON in 1981 it was still AAF
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules
Contracting Business

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
HPAC Engineering