Table 7: ClimaDry Reheat Coil Pressure Drop - TS Units (PSC Motor)
Coil Face |
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TSH/V/D | TSH/V/D | TSH/V/D | TSH/V/D | TSH/V/D | ||
Velocity | ||||||
FPM | 018 | 024, 030 | 036 | 042, 048 | 060, 070 | |
| In. of Water | In. of Water | In. of Water | In. of Water | In. of Water | |
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200 | 0.037 | 0.033 | 0.031 | 0.028 | 0.026 | |
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250 | 0.052 | 0.046 | 0.042 | 0.038 | 0.034 | |
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300 | 0.077 | 0.066 | 0.059 | 0.051 | 0.044 | |
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350 | 0.113 | 0.096 | 0.085 | 0.073 | 0.061 | |
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400 | 0.181 | 0.160 | 0.145 | 0.131 | 0.117 | |
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450 | 0.242 | 0.226 | 0.215 | 0.205 | 0.194 | |
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500 | 0.360 | 0.345 | 0.335 | 0.326 | 0.316 | |
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For TS units with ClimaDry Reheat coil applications, calculate face velocity of the entering air. From the table above, find ESP for Reheat application. The loss includes wet coil loss.
Example:
Reheat coil pressure drop can be determined from the above table. Coil velocity (FPM) = Airflow (CFM) / Face Area (sq. ft.).
1)TSH036 has a face area of 4.86 sq. ft. (see physical data table in I.O.M.).
2)At 1,100 cfm, coil velocity (FPM) = 1,100 / 4.86 = 226 FPM.
3)From above table, it will be necessary to subtract 0.037 from the blower performance ESP.
4)On medium speed, the TSH036 (without reheat - see blower table) can deliver 1,100 CFM at 0.28 in. wg. with the standard PSC motor; with the reheat coil, it now delivers 1,085 CFM at 0.28 in. wg. or 1,100 CFM at 0.24 in. wg.
5)If the decrease in airflow is acceptable, no changes are necessary. Otherwise, high speed fan should be used to overcome the pressure drop of the reheat coil.
Table 8: TS Air Coil Face Area
Model | 018 | 024 |
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| 030 | 036 |
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| 042 | 048 |
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| 060 |
| 070 | |||||||||
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Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | Horiz. | Vert. | |||||||||
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Coil Face | 3.38 | 3.33 | 3.88 |
| 3.89 | 3.88 |
| 3.89 | 4.86 |
| 4.86 | 5.56 |
| 5.56 | 5.56 |
| 5.56 | 6.25 |
| 6.25 | 6.25 |
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Area, sq. ft. |
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(0.3135) | (0.3097) | (0.3600) | (0.3613) | (0.3600) | (0.3613) | (0.4516) | (0.4516) | (0.5161) | (0.5161) | (0.5161) | (0.5161) | (0.5806) | (0.5806) | (0.5806) | (0.5806) | |||||||||
(sq. m) | ||||||||||||||||||||||||
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ClimaDry Whole House Dehumidification - ClimateMaster Geothermal Heat Pumps - Rev.: 18 April, 2008B
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