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Thread: need a ratician
11-10-2012, 02:07 PM #1
need a ratician
That's only a portion of the wiring on a 26 year old Heil, on it's side in an attic but still as big as a damn basement freezer. There are no less than five relays on it, a couple being added later for whatever purpose. Apparently on this model they had separate xfmers, relays and everything for both heating and cooling. I couldn't wrap my head around it in the brief time I was up there.
Another contractor had so mangled the job of putting in a heat pump over this past vicious summer that the H/O gave up and got by on a window unit. Now the blower will not come on after the furnace fires (thank God it did fire on emergency heat).
I took one quick look at that mess and grabbed L1 off the primary side of the heating xfmr and put it to a low motor speed, verified common and let 'er rip long enough to make sure it was enough air to avoid tripping on limit. Continuos blower operation while d/c is on and heat will cycle via stat to get him by until we can replace everything.
Ironically, I had just received my RSES Residential Troubleshooting book which seems to have a very detailed section on reading schematics.
11-10-2012, 04:54 PM #2
Being able to read the schematic isn't always the greatest tool but being able to draw your own schematic from hacked up wiring is.
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11-10-2012, 07:14 PM #3
11-10-2012, 07:20 PM #4
11-10-2012, 10:50 PM #5
I vote for rip it all out and start over. That's a redonkulous mess. Agreed on both points of reading diagrams and making your own. Keep in mind there are tons of different ways to wire something and still have it be functional and safe. A good 15 minutes of "studying" the wiring, you'll be on your way. Helps me to talk it out.....
11-10-2012, 11:26 PM #6
I'm sitting here studying a RSES book on schematics on a Saturday night. Only because the wife is away on business - I'd never get away with this much HVAC time if she were here. But she does appreciate the fact that she is comfortable now no matter where she goes in the house. We have no less than 4 ACs including the regular split; I got big time husband points for the LG portable below in the room she suddenly proclaimed her aerobics room. Some kind of program called the "insanity" workout...with a big black guy screaming at her on the dvd as she makes noises I've never heard.
I don't really care to even go into that room anymore.
But I've found it's best just to keep them cool when they turn fifty. And not proclaim when they get their AARP mailings to "open it quickly - time is short..."
11-10-2012, 11:49 PM #7Professional Member
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- Jan 2010
11-11-2012, 12:00 PM #8
Kind of going through the same scenario here in Houston, I did mine with a mini-split and before any work out begins I swear you could hang meat in that room. At night when sleep comes she is under 3 Quilts. Sometimes in the middle of the night she gets up and yells "Why is it so damn hot in here". Footnote- I havn't gotten it on the side for so long, I didn't know they moved it ! -GEOOf all the things I have lost in my life, I miss my mind the most-GEO
11-11-2012, 12:35 PM #9
i vote rip it out and start over.
11-11-2012, 02:53 PM #10
11-11-2012, 03:32 PM #11
11-11-2012, 04:35 PM #12Every customer you take for granted today will be someone else's tomorrow.
11-11-2012, 04:56 PM #13Regular Guest
- Join Date
- Apr 2012
Could try to say its a "sweat yoga" room on another not i had to wire a fu bared boiler with just 2 relays, pumps ect. Rewired the whole thing according to the manufactures shamatics and a we bit tweeking as it nevef ran right for 10 years. Now it runs right with safties and 2 zones. Simple but took me 1.5 hours to figure out who did what. Boss wasnt happy but when i send a pic of the birds nest he was like. Wtf? Got it right though.
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