"Harry Muscle" wrote in message
oups.com...
How can a poor
installation ruin a good furnace? What makes it a poor installation?
Are we talking about the preparation part of the installation, like
getting the correct size (BTUs), proper chimney size, correct vent
sizes, etc. ... or are those persons refering specifically to the
installation part ... what can go wrong during that part?

Thanks,
Harry

P.S. The more technical the information you provide the better ...
thanks.


Ever see a chimney vented down hill?
Ever see PVC venting that did not drain condensation properly?
Ever see improper materials used for supply air duct?
Wrong gas pressure, or improper gas line size?
Ever see condesate drain from the AC coil improperly and ruin a perfectly
good furnace?
Ever see some one replace a furnace where the old duct work as inadequate
for the new unit, but it was fine for the old unit?
I have seen so much hacked up, **** installs I wish I could do something
myself to keep the crooks from ever doing business again!
There is so many points as to the difference to a good install compared to a
great install it would be impossible to list them all. USUALLY experience
will lend itself to a better install, assuming the installer gives a ****
what his work looks like!
One of the worst installers I have ever seen worked for the same company I
work for! ( No longer!) He knew it all, but in reality know very little. He
would do something wrong and you could show him in the install manual
proving he was wrong, but no, he knew more than the manufacturer!

When I do an install I take a few minutes to go through the manual, even if
I have installed the same equipment before, things change! I check my gas
supply to make sure it is adequate, even on a change out of similar
equipment. I measure duct work to make sure the duct is of reasonable size,
too big or too small is bad. I lay cardboard on the floor in the working
area to catch drips of pipe dope and PVC solvents. I use a level to get
pipes straight and neat. On start up I check amps, gas pressure, temp rise,
blower speed, AC pressures, super heat/sub cooling, and more depending on
what is required. When it is all done, I get a broom and dust pan from my
truck and sweep up the area, perhaps even wash the floor if needed.
I have seen installs where they set the furnace in place, hooked up the gas,
duct, and vent then start it up and run. . Not one test was made to ensure
it was running properly and the install manual is still sealed shut, rolled
up in the furnace.
Greg