Static Pressure? - http://www.hvacmechanic.com/ Forums
Original message
| gbreezer80
 |  "Static Pressure?"
, posted Tue 15 Jul 15:27  
I just had a Carrier Infinity 21 SEER 5-ton system installed with the Infinity Air Purifier (GAPA). Is a static pressure reading of .82 high for this setup? When I pull out the media filter from the purifier, the pressure is only .47.
I have three return vents as well - 1 20x25, 1 24x12, 1 14x15
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Replies:
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| ampulman
| "Re(1):Static Pressure?" , posted Tue 15 Jul 17:05
Most systems would like to 'see' a static pressure of .5". A pressure drop of .35 for the media filter seems on the high side.
My media filter has a drop less than .2 at the highest speed that the system needs to operate.
The higher the SP, the harder your VS blower will need to operate (excessive current draw)to deliver the required CFMs, and will result in a shortened life for the motor.
Check with your installer and see if he can install an alternate filter medium.
AM
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| | gbreezer80
| "Re(2):Static Pressure?" , posted Tue 15 Jul 19:09:
Those numbers are what I thought it should be (around .5).
I specifically paid extra $$ to get the Carrier Air Purifier (electronic), so changing this out is not an option.
I just removed the two hallway registers and measured the static pressure again. Now I am down to .74!! The ones in there are the Air Mate type. I think the eggcrate (cube core) would work much better in air flow.
I can make the opening about 8" larger in one of the return openings and 2" in the other. Would this help?
Any other suggestions to get the SP down to .5?
By the way, I am only getting 1750 CFMs - what controls this?
[this message was edited by gbreezer80 on Tue 15 Jul 20:36] |
| | Freon
| "Re(3):Static Pressure?" , posted Wed 16 Jul 15:57
What is the static pressure of the return side and the SP of the supply side (just before the evap coil)? Maybe you have a supply problem.
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| | gbreezer80
| "Re(4):Static Pressure?" , posted Wed 16 Jul 19:04
Don't know...I don't have a meter to determine this. I'll ask my installer about this.
Good question to ask though! Thanks...get 'em coming. My Infinity control only gives the total static pressure
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