"Harry Muscle" wrote in message
oups.com...
I'm assuming the installation manual comes with the furnace (ie: not
something bought seperately) ... so if I were to read it from cover to
cover would it explain things enough for someone good at handy man work
to understand it and be able to double check that the HVAC contractor
did most of his work correctly? Or in other words does the
installation manual outline the correct gas pressure, gas line size,
how to properly drain the AC coil condensation, how to know if the
existing duct work is adequate, etc.?

Thanks,
Harry

The manual will have wiring diagrams, utility requirements, space
requirements.

It will have nothing about good plumbing practice, local codes, duct
requirements, etc. That varies for each situation so the installer must
know how to do that and do any calculations for sizing and the like. You
won't know if the proper procedure was followed for hooking up the line set
to avoid contamination.