Steve Bakken Posted July 8, 2008 Share Posted July 8, 2008 So we just replaced our a/c unit with a new one. Our HVAC guy has all of the plumbing taken care of but doesn't do the wiring. It just seems like a shame to have our electrician come all the way out for just five wires. It'll probably cost more to make the trip out than it will for the labor. The power wires are a no-brainer, but there are two blue wires coming from the unit, and a white and a red coming from the house, that I'm not exactly sure of. Is this something a fairly handy guy can handle, or am I treading in a professional's-only domain? Link to comment Share on other sites More sharing options...
Whoaru99 Posted July 8, 2008 Share Posted July 8, 2008 I think it depends on what is there already.Seems I recall being told that there must be a disconnect switch put by the unit, and there must also be a 120V receptacle installed to facilitate power supply if needed for servicing, etc.Don't know if all that is true, but it sticks in my head for some reason. Link to comment Share on other sites More sharing options...
JohnMickish Posted July 8, 2008 Share Posted July 8, 2008 The HVAC guy cannot by law do the electrical unless he holds an electrical licsense.Kind of funny how you say "The power wires are a no-brainer, but there are two blue wires coming from the unit, and a white and a red coming from the house, that I'm not exactly sure of."Not really a no brainer, huh? Spend the $100 bucks and get it done right.Not to be a smart a@@ but I've seen to much of my trade given away here. Some things are best left to those that are in the know. Link to comment Share on other sites More sharing options...
Roofer Posted July 8, 2008 Share Posted July 8, 2008 Awww, come on.....give out the info. It's not like there are people stealing your work.I see your point, but it's a service call, nothing more. Link to comment Share on other sites More sharing options...
fastkaw Posted July 8, 2008 Share Posted July 8, 2008 the two blue wires are the low voltage wires.just hook them up to the two low voltage wires coming out of the house.You do need a disconnect on the side if the house.The line voltage should be on 24 hr. before you start the unit.There is know way you can know if the unit has the correct charge if the unitis not running.The contractor should have told you the line voltage was not included.......Id be looking for a different A/C man if I were you.GOOD LUCK Link to comment Share on other sites More sharing options...
Steve Bakken Posted July 9, 2008 Author Share Posted July 9, 2008 Thanks, fastkaw. In response to the idea of giving away "trade secrets", I completely understand where you're coming from, mnfishingguy. Having been in the boat repair business for over 20 years, it's difficult for me to give away free help and advise on the boats and motors forum. But, that's the whole purpose of these forums is to help and share information with fellow sportsmen. I've found that do-it-yourelfer's are going to tackle projects regardless of how much or how little professional advise that they get. I'd rather help these guys out so that they can have the satisfaction of getting their project done successfully. What I've found though, since I started moderating the forum is that our business has actually grown as a result because we're the first one these guys call and bring work to when they do have a project that's too much for them to handle. I would bet that Lawnmowerman and Powerstroke can attest to this as well. I'm not saying that I'm right and others are wrong, it's just my opinion and I thought that I'd throw it out there. Link to comment Share on other sites More sharing options...
Whoaru99 Posted July 9, 2008 Share Posted July 9, 2008 Also, as I mentioned before, I think you need a GFI receptacle in (or within a certain distance of) that A/C disconnect switch. So, that will mean installing a separate 120 circuit from your service panel to power the receptacle.I'm having a hard time finding a reference/confirmation of that because I don't have NEC code book. But, I'm almost positive that's what the electrician said when he hooked up a friend's new AC system.EDIT: Just thinking, maybe the stuff I mentioned is only required in a new installation, and not in a replacement? Link to comment Share on other sites More sharing options...
Surface Tension Posted July 9, 2008 Share Posted July 9, 2008 This is DIY forum not to mention this whole site is based on sharing information. If you want to keep trades secrets, or fishing information to yourself thats up to you. Thankfully there are those that share, without that we might as well turn the lights off. Link to comment Share on other sites More sharing options...
fastkaw Posted July 9, 2008 Share Posted July 9, 2008 They make a out door disconnect with a duplex built in. Works pretty slick. unknown if is GFI or not.You do need to run a separate 110v wire to it so I don't see any resin whyyou couldn't make it GFI if needed. I have know idea what your cods are in your state/county. In my county you need a disconnect and that all.All central A/C units need a out door disconnect..................Regardless if the code says you need one or not. That my code..........If you don't have one when I get there you will by the time I levee.OR IM NOT TOCHEN IT. Link to comment Share on other sites More sharing options...
JohnMickish Posted July 9, 2008 Share Posted July 9, 2008 Frank, I agree 100% with you but there is a difference between sharing information and telling people how to do it. You know, the difference (in this case) of "those are the low voltage stat wires" and "this wire to point A, this wire to point B,..." when by doing that I either am taking work away from myself or others in the trade.I know that nobody is going to agree with me on this but that's how I feel. I'll help out a guy all I can but I can't see doing it to the point of taking food off the table any more. Work is getting pretty tight out there. Kind of like the difference between someone saying "15ft in the rock/sand transition" or giving out GPS coordinates. Link to comment Share on other sites More sharing options...
papabear Posted July 9, 2008 Share Posted July 9, 2008 I dont know if they need a 110v outside, Seems I always have to run an extension cord if I need power while servicing the outside unit. Some techs are qualified to connect the wires to the unit, and some just refuse to do it.As far as free trade secrets. I didnt know there were any "trade secrets". If you are afraid of loosing business by advising a DIYer, then advise them to hire a pro before they get hurt or do damage. I was taught to be a professional and make my customers happy and they will bring more business if I treat them fair and resonably. Sounds like most here are smart enough to do that. Link to comment Share on other sites More sharing options...
Roofer Posted July 9, 2008 Share Posted July 9, 2008 I do agree with mnfishinguy, but it will never change. No offense, but people in general are very cheap, especially when it comes to easy labor jobs that they can possibly do themselves. As for what I do, I figure, let them do it. Chances are after doing it once or twice, they will find out it's not as easy as they thought. Have had to help out DIY'ers before when it started raining on them and their "friends" didn't show up. We normally make sure they are paying a little more also. Link to comment Share on other sites More sharing options...
Whoaru99 Posted July 9, 2008 Share Posted July 9, 2008 I dont know if they need a 110v outside, Seems I always have to run an extension cord if I need power while servicing the outside unit. I think the receptacle is a somewhat newer (a couple Code revs ago??) requirement. Link to comment Share on other sites More sharing options...
bbqhead Posted July 9, 2008 Share Posted July 9, 2008 thanks for that post surface tension! i was gonna say somethingbut i am not a regular type poster. if you check the poster in question, seems to me he was asking someone a question about moving a A/C unit away from the house.. hmmm maybe wants a A/Cguy to give away trade secrets?i am a RV tech and i try to answer every question that is askedhere. its all about trying to help your fellow sportsman.sorry if i stepped over the FM line..randy Link to comment Share on other sites More sharing options...
JohnMickish Posted July 10, 2008 Share Posted July 10, 2008 Nope, not looking for trade secrets, just looking to see if it was possible since I have never seen it done before. When it comes time to do it I'll hire it out, to another tradesman, and if you noticed on my question I didn't ask for anything specific, only if it could be done. I didn't ask for line size needed or if anything out of the ordinary would be needed, only if it was possible.FYI, I have answered many, many questions but there is a difference in answering it and telling someone how to do it. There are lots of recources out there on how to do things, once you know what you have to do.How come if someone where to ask where to fish on Mille Lacs the professional guides (who make their living off of what they know) won't give out there honey hole coordinates and the right technique for the time/day and thats acceptable but if I or someone else in the trades (who also makes their living off of what they know) decides not to give out the secrets and knowledge from years of experience anymore that's not acceptable? Doesen't seem fair to me.This post got way off track and it's my fault and I apoligize for that.Roofer brings up a great point, it's almost always more expensive to have someone come in and fix anothers mistakes than to have just hired it out in the first place. Again, I'll help out in any way I can, short of giving my work away. Link to comment Share on other sites More sharing options...
JohnMickish Posted July 10, 2008 Share Posted July 10, 2008 As far as free trade secrets. I didnt know there were any "trade secrets". If you are afraid of loosing business by advising a DIYer, then advise them to hire a pro before they get hurt or do damage. I was taught to be a professional and make my customers happy and they will bring more business if I treat them fair and resonably. Sounds like most here are smart enough to do that. Read my first post, I suggested to hire it done. Lot's of trade secrets, mostly from having done things before and relating how to transfer what a guy has learned in the past to the task at hand. That and knowing what code rules apply in each situation, because the rules change alot depending on different things.And yes, you need a GFCI protected receptacle within 25 feet of said unit. Link to comment Share on other sites More sharing options...
chasineyes Posted July 12, 2008 Share Posted July 12, 2008 mnfishguy is right you do need a receptacle within the 25 feet distance, I was told that this was so the service people would have a power supply if they needed to work on it??? Link to comment Share on other sites More sharing options...
fishandshroom Posted July 13, 2008 Share Posted July 13, 2008 code smode he was just askin a simple question and now you have sucessfully made yourself look like a GREEDY contractor good job more work for someone else Link to comment Share on other sites More sharing options...
JohnMickish Posted July 13, 2008 Share Posted July 13, 2008 code smode The code is there because people died. Link to comment Share on other sites More sharing options...
sparcebag Posted July 13, 2008 Share Posted July 13, 2008 Ya Code is code if ya dont know it learn it then procedeSteve Balken good post! Good things come to good people! Link to comment Share on other sites More sharing options...
drowned minnow Posted July 13, 2008 Share Posted July 13, 2008 and you will also need to file a electrical permit Link to comment Share on other sites More sharing options...
Farmboy1 Posted July 14, 2008 Share Posted July 14, 2008 If you do the work yourself, it is not permited, and something goes wrong, house burns down, insurance laughs at you since it was not inspected. You have nothing, all to save a few bucks.I don't really care if you do it yourself, but please pull a permit, have it inspected, and do it the right way. The inspector will ensure all the codes are followed. Link to comment Share on other sites More sharing options...
sparcebag Posted July 14, 2008 Share Posted July 14, 2008 I had mine installed by a company,Old one went out! They came out NO PERMITS involved did everything,weld lines install new A coil,charge lines and wire,NO INSPECTIONS Job all completed one company no hassles.2 yrs ago.County said no inspections required! Link to comment Share on other sites More sharing options...
drowned minnow Posted July 15, 2008 Share Posted July 15, 2008 I had mine installed by a company,Old one went out! They came out NO PERMITS involved did everything,weld lines install new A coil,charge lines and wire,NO INSPECTIONS Job all completed one company no hassles.2 yrs ago.County said no inspections required! Minnesota Department of Labor and Industry usually has Jurisdiction and not the county. You mite have been miss informed. Link to comment Share on other sites More sharing options...
sparcebag Posted July 15, 2008 Share Posted July 15, 2008 Originally Posted By: sparcebagI had mine installed by a company,Old one went out! They came out NO PERMITS involved did everything,weld lines install new A coil,charge lines and wire,NO INSPECTIONS Job all completed one company no hassles.2 yrs ago.County said no inspections required! Minnesota Department of Labor and Industry usually has Jurisdiction and not the county. You mite have been miss informed. What would they have anything to do with,Mechanial,Electrical?? other than workcomp. Link to comment Share on other sites More sharing options...
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