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newguy

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Everything posted by newguy

  1. No I meant sequencers, i am trying to figure out how to load a picture. Here is a brief discription. The terminals at the base are the 24 volt ac. control inputs. Caution: some Lennox Furnaces have sequencers with 240 volt inputs. The specs on the top of the unit indicate the the first stage is "first on last off" and the second stage is "last on and first off" Some setups the sequencer also controls the blower fan in the unit. Units with more elements will have additional sequencers that are "last on" first off". Then I found this Different manufacturers use different devices, some use contactors, while others will use relays or sequencers. Some use a combination of contactors and sequencers to activate a second stage heat bank. Which leads us to a noisy relay or contactor. Image Insert: 15.86 KB
  2. When you can show me a journeyman's ticket for each of the trades I will agree with you, untill then I agree let the exoerts with the certification evaluate the areas that need repair or attention.
  3. Electric heat banks are usually timed on by sequencers which are bimetal snap discs and usually very quiet except for a quiet snap when turning off or on. I would be inclined to belive it is the motor contactor or transformer, but why only in resistance heat mode? Best left to the HVAC guys to determine the problem, as long as yoiu noted it.
  4. LENNOX is one of the mfg's who like to encrypt. The FIRST TWO numbers after the model number represents the nominal tonnage. example CB10-41 or CB10-65 CB10 is STYLE AND SERIES MODEL, 41 INDICATES THE NOMINAL TONNAGE 3 TONS, 65 = 5 TONS. These can sometimes be difficult to interpret for example a heat / cool roof top unit GCS4-261-60 GCS4-261-60 would indicate GCS4 = Model 261 = 2 tons cooling 60 = 60000 BTU Heating 21 = 1 1/2 TONS 26 = 2TONS 31 = 2 1/2 TONS 41 = 3 TONS 46 = 3 1/2 TONS 51 = 4 TONS 65 = 5 TONS
  5. My apologies to everyone, I did not mean to insult any one. This discussion seemed to go down hill since I entered it. I did not mean to direct it that way. Like my name says I am a new guy at this and have very little experience at home inspections. I just don't understand why the inspector would be held responsible for the A/C system under these curcunstances, the size difference is in acceptable parameters, he couldn't operate it due to temperature, the standards back him up in more than one definition and the warranty technician is blaming the inspector for his company's mistake. If I read it correctly. As far as my name goes It is Gordon Kay and I messed up my first subscription some how and ended up using a handle. I will correct that soon.
  6. Paul's going to hell with the roofers
  7. OK I agree lets help this guy, first off why doesn't he know the S.O.P.? Who is he associated with ASHI, NACHI...? You don't know your own standards you deserve what you get, maybe he should INSTALL HVAC systems instead. But its inspectors who don't know the standards that will give us all a bad name. Having said that, was the indoor coil model and serial number "READILY ACCESSIBLE", 99% are not, they are inside the plenum on the evap coil. Given all the info I've read so far this inspector is not liable.
  8. Hey guys, HVAC is a huge trade encompassing heating air conditioning and ventilation put an R on the end and you have refrigeration. It is usually broken down into separate trades, tin bashers install the duct work and furnace. Gas pipers is a separate trade again and so is air conditioning. To SERVICE all the above is where you get a technician who is usually an apprentice refrigeration or journeyman. It is not like your regular trades, ie plumber, carpenter, bricklayer, its H V AC R. The problems you guys have been disgussing here about mismatching coils is simple, it is bad practice, but it is done and the indoor coil (in case we are talking heat pumps as well) should only be one size larger, not smaller. Pipe sizing is set for refrigerant velocity to ensure proper oil return to the compressor. The problems generally show up on retrofit systems where you get salesmen sizing things up improperly and putting in that oversized or under sized coil, a new apprentice with little experience installing it. Then it doesn't work, the warranty expires, a tech comes in and discovers all the screw ups. I am just wondering why you guys are busting a nut over this? The standards state clearly that we don't do capacity or adequacy or efficiency or any engineering. Seems to me if we guys were to stick to our own standards of observe describe and report, we would have less to worry about. I have spent 30 years in HVAC Canada and I've seen it all and all I do is write down the model and serial numbers and don't worry about the rest, if I have any questions about the system I defer it to the "EXPERTS" and let them figure it out.
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