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coolmen
03-05-2010, 09:02 AM
I am new to the Bryant products and specs.
I looking at the 187a condenser 3 ton 2 stage spec sheet and want to be shure of my sensibles.
the chart as follows is

cfm 1050
EWBulb condenseing air 75 85 95
72 --- 19.03 -- 17.82 -- 16.65
67 --- 24.01 -- 22.66 -- 21.35
63 --- 23.03 -- 21.69 -- 20.39
62 --- 27.61 -- 25.50 -- 23.43
57 -- 27.61 -- 25.50 -- 23.43

Im use to seeing temps but not wet bulb temps.
my load calculation for example is design indoor 75* outdoor 92*
sensible needed is 25,000 BTU
would I want to size by the 72wb # for worse case ?
I assume im looking between 85 and 95 out door design collum.
what is 75 * temp in regards to the wet bulb?

mchild
03-05-2010, 09:33 AM
I am new to the Bryant products and specs.
I looking at the 187a condenser 3 ton 2 stage spec sheet and want to be shure of my sensibles.
the chart as follows is

cfm 1050
EWBulb condenseing air 75 85 95
72 --- 19.03 -- 17.82 -- 16.65
67 --- 24.01 -- 22.66 -- 21.35
63 --- 23.03 -- 21.69 -- 20.39
62 --- 27.61 -- 25.50 -- 23.43
57 -- 27.61 -- 25.50 -- 23.43

Im use to seeing temps but not wet bulb temps.
my load calculation for example is design indoor 75* outdoor 92*
sensible needed is 25,000 BTU
would I want to size by the 72wb # for worse case ?
I assume im looking between 85 and 95 out door design collum.
what is 75 * temp in regards to the wet bulb?

72*F WB would be 75*F DB with 87% RH. I would think you would want to use a WB of 62 - 63*F, which would put you in the the range of 48 - 52% RH. Depending on your latent load you may be able to use some of the latent capacity for your sensible load.

coolmen
03-05-2010, 10:04 AM
My hvac calc 4.0 relativr humiditiy is @ 55 % and my latent is @ 2600 with the sensible needed 25,000

Would it be fair to say that at 63 wb and 95 * condenseing air temp

my producing sensible would be 20.39 and humidity around 50% ?

mchild
03-05-2010, 10:57 AM
My hvac calc 4.0 relativr humiditiy is @ 55 % and my latent is @ 2600 with the sensible needed 25,000

Would it be fair to say that at 63 wb and 95 * condenseing air temp

my producing sensible would be 20.39 and humidity around 50% ?

Read the foot notes at the end of the extended data tables. The listed sensible capacities at 75*FDB/63*FWB do not need any adjustments. The other values do need to be adjusted as detailed in the notes.

coolmen
03-05-2010, 11:10 AM
Now why did they hide those darn foot notes.
:))
thanks for your help.
CJ