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condenser air temp. - HVAC-Talk: Heating, Air & Refrigeration ...

Old 02-21-2012, 07:12 PM

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condenser air temp.


On a 90 degree DAY,should the discharge air from condenser fan be 30 degrees above ambient temp.(120)Anything less would mean dirty outside coil? True or not.

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Old 02-21-2012, 07:23 PM

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In the ball park,depends on a lot of variables...

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Old 02-21-2012, 08:09 PM
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Hewitt,

Please start threads for tech questions in the tech-to-tech area.

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Old 02-21-2012, 08:16 PM

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Quote:

Originally Posted by jpsmith1cm View Post
Hewitt,

Please start threads for tech questions in the tech-to-tech area.

Sorry. Still getting use to site.Love it
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Old 02-21-2012, 08:17 PM

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Quote:

Originally Posted by hewitt View Post

On a 90 degree DAY,should the discharge air from condenser fan be 30 degrees above ambient temp.(120)Anything less would mean dirty outside coil? True or not.

The more dirty the coil is the higher the temperature will be. 20 degree rise is considered ideal.
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Old 02-21-2012, 08:57 PM

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Chart that I Use.

SEER

TD Range

8

30 35

10

25 30

12

20 25

13>

10 20

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Old 02-21-2012, 11:41 PM

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Has anyone seen the last reply.Has someone ever used this.I never seen this scale

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Old 02-21-2012, 11:47 PM
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the scale to me sound about right. this is going off what I normally get. I use my pressure to let me know if my coil is dirty

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Old 02-22-2012, 12:34 AM
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when it comes to knowing if condenser coils are dirty, other than sight. Is to go by how the unit is running, SH, DT, pressures. If the unit is running as designed based on the running specs. cleaning a coil will not make it run any better. but as a rule 10 to 20 Diff. is what i have used as a quick check

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Old 02-22-2012, 07:23 AM

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30* for r22 and 20* r410a?

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Old 02-22-2012, 07:27 AM
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Quote:

Originally Posted by alex13177

30* for r22 and 20* r410a?

Refrigerant doesn't matter.
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Old 02-22-2012, 07:50 AM

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Originally Posted by jpsmith1cm View Post

Refrigerant doesn't matter.

you are right, I was thinking something else. Brain fart!
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Old 02-22-2012, 08:21 AM

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openclasspro mentioned variables in that equation, some of them include: if you are maintaining a 68-70 Room temperature the OD coil temperature will be lower than if you just came home and had the system off and it was 80 inside. Also low air flow (dirty coil, filter blocked return, blower running too slow) can cause the OD coil to bee cooler than expected.

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