[rifter]

Welll, this one was interesting. Nobody had ever been out to look at it since it was installed. The high limit was bypassed for some reason. The indoor coil is backwards.

My question is: What difference does it make? It must be a series of stacked "A" coils on their side, so what difference does the direction of airflow make. Is it just for the condensate drain to work correctly...

 

[coolin4u]

notice it says "recomended" not "must be installed" this direction,i have seen a few like that over the years but none with any type of problems

 

[indian]

You never know until you try! The way units are engineered and what we deal with for tech support now days.....chances are this works better than how the desk jockeys proposed it should work!

 

[vmc1161]

Rifter; Air flow direction is important, How is the coil fed is it a one pass or multi pass. On a multi pass if you feed into the first pass that the air passes over you will decrease the amount of cooling the other pass(s) will do. Also condensate draining could be effected as you need proper air flow to assist in holding the condensate to the coil as it runs down, you may also get some blow off and soak the insulation causing mold problems. Well I hope that helps a little, I'm hungry got to go.

 

[sidewinder708]

that person must have had a dick in their mouth
lol lol

 

[cxagent]

Rifter; Air flow direction is important, How is the coil fed is it a one pass or multi pass. On a multi pass if you feed into the first pass that the air passes over you will decrease the amount of cooling the other pass(s) will do. Also condensate draining could be effected as you need proper air flow to assist in holding the condensate to the coil as it runs down, you may also get some blow off and soak the insulation causing mold problems. Well I hope that helps a little, I'm hungry got to go.

VMC has it right. To get full rated performance of most coils the airflow direction is important. The coldest refrigerant should be at the leaving side of the coil, not the entering side.

The other problem is condensate control. Horizontal coils will usually have a larger pan on the downstream side than on the upstream side. Some A-coils come with instructions on reversing the airflow direction. Some A-coils shouldn't be reversed ever.

 

[PaysonHVAC]

Wow. Looks like a Phoneix area install to me

Was there a cat walk under all that inso?

 

[rifter]

cat walk

Yes Payson there WAS a cat walk under the insulation. I know this comes as a shock to you, since this IS in the Phoenix area. However, it's in Scottsdale, North of the 101, just off Scottsdale Road. Which means the $700,000 the owners paid for the house gave the builders the extra $20 they needed to buy a sheet of chip board.

 

[benny hinn]

There are manufacturers that allow for the coil to be installed "Backwards" since they may not make a right handed coil. There are manufacturers that have a coil which can be flipped inside the casing, which is better in my opinion. Installing the coil "backwards" will probably require a transition between the furnace to coil junction, as well as stepping the fan speed down to avoid water blow off. It is all in the installation instructions for the coil, if they happen to be laying around in all of that insulation somewhere.

 

[dave82323]

air does flow better downhill, damn I am sorry I meant water..

 

[ductingfool]

I was on a install a few years back and asked myself that same question. Does it matter which way airflow is pointing? I read through the manual and found that reversing the airflow has you lose like 1.5% of colling peformace. Now being as the install would go smoother with the airflow reveresed, with taping and copper hook ups, That's how she went in. Didn't see a problem with a 1.5% loss. Homeowner probably never knew the difference

 

[benny hinn]

Both air and water flow better down hill due to gravity. I am not sure what you are trying to get at. Clarification?

 

[coolclassics]

Is this just a gas/electric setup or is it a heatpump.

If it is a heatpump application with a gas backup, the refrigerant coils can be placed with no problem in the supply air as long as the system is equipped with a fossil fuel kit.