I am installing a central air system in a house with an oil furnace
and I need help with hooking up the control to turn on and off the
cooling. The furnace controls has only 4 contacts for the heating and
nothing for cooling. There is a 20V power supply on the system but
unsure if I can use this. I believe I need 24v relay added. here are
some photos for referance:
Any help would be appriciated to get this connected will be greatly
If the oil furnace has a large rather round heat exchanger coming close
to the top of the furnace, use rails on the plenum and install the
evaporator coil as far above the furnace as is practical.
If you are using a cased coil I would use a transition between the top
of the furnace and the entry area of the cased coil.
Two main reasons for channeling the air into the intake area of the coil
is due to the fact that the air comes up the sides of the furnace &
"will cause excessive turbulence as well as be restricted Skyrocketing
Static Pressures & defeating Velocity FPM Pressure into and through the
That can cause and excessive pressure drop before the airflow gets
through the E-Coil, which is the worst possible scenario regarding both
Static Pressure and Velocity Pressure at the diffuser outlets, resulting
in horribly inadequate airflow, and also a Lack of an adequate Heatload
on the E-Coil!
The larger the AC, - will usually result in the least CFM Airflow Per
Ton of Cooling. Both the BTUH Capacity & the SEER Rating, - could be
reduced up to 50% or more. Plenty of research testing has borne out
these results, - don't end up paying for something you are NOT Getting.
(Click My Linked Pages) - udarrell
Crank Your Oil Furnace ACs Up To Mfg\'ers Specs
Those are actually pretty good instructions IF followed closely by H.O. If I
sold the system and gave the H.O. a $200. discount on my price, I would
gladly skip the bullshit part of the installation and take over where the
instructions suggest. Problem is the H.O. is going to want $1000. discount
for his five days of work.
If I get the icecube relay setup than all I need is the 2 copper lines
installed, filled, and tested.
for the copper,, the holes are already drilled out with a strait
passage from the furnace to the outside. This would be a nice quick
and easy job.
I don't see anything wrong with that.
I would have simply let the contractor do the manual J, manual S, and
manual D, so that everything was sized correctly for your home.
They can do that install to code a lot faster & easier than you can. You
shouldn't need much tonnage in Canada.
You never want to uncap those refrigerant lines until they are going to
be immediately brazed while flowing dry nitrogen, and then a proper
I also always put a proper sized filter dryer on the suction line.
Just let the contractor's tech do the all that control wiring setup!
No, I won't intimidate you Greg, I always put the customer first,
however, since you bought the equipment elsewhere many contractors will
not do much discounting of the price for your work, if they will do it
at all. You're okay Greg, don't concern yourself about what any of us
say that's negative! - udarrell
Crank Your Air-Conditioner Up To Specs & Oil Furnace ACs
Isnt Alpine great? They gladly sell you equipment that they tell you
can be easily installed. Hows that for a load of sunshine up your ass?
I especially like how they tell you they will contact several HVAC
companies for you to do the work if you dont feel comfortable with it.
How many of those companies they sent letters out to actually called
What? None of them called you back? But, but, but.........Alpine told
you they would get someone for you. What happened?
hehehe Fucked again.
By the way.......you might find it interesting when you go to
www.goodmanmfg.com website and lookup the warranty on the Goodman you
bought from Alpine. Goodman gives you zip, nadda, nothing for a
warranty if you purchased it over the internet.
I hope that $1,000 savings was worth it.
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