Application Guide

ClimaDry Whole House Dehumidication - ClimateMaster Geothermal Heat Pumps - Rev.: 18 April, 2008B
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Table 7: ClimaDry Reheat Coil Pressure Drop - TS Units (PSC Motor)
Coil Face
Velocity
FPM
TSH/V/D with Reheat ESP Loss
TSH/V/D
018
In. of Water
TSH/V/D
024, 030
In. of Water
TSH/V/D
036
In. of Water
TSH/V/D
042, 048
In. of Water
TSH/V/D
060, 070
In. of Water
200 0.037 0.033 0.031 0.028 0.026
250 0.052 0.046 0.042 0.038 0.034
300 0.077 0.066 0.059 0.051 0.044
350 0.113 0.096 0.085 0.073 0.061
400 0.181 0.160 0.145 0.131 0.117
450 0.242 0.226 0.215 0.205 0.194
500 0.360 0.345 0.335 0.326 0.316
For TS units with ClimaDry Reheat coil applications, calculate face velocity of the entering air. From the table above, nd 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) = Airow (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 airow 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
018 024 030 036 042 048 060 070
Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert. Horiz. Vert.
Coil Face
Area, sq. ft.
(sq. m)
3.38
(0.3135)
3.33
(0.3097)
3.88
(0.3600)
3.89
(0.3613)
3.88
(0.3600)
3.89
(0.3613)
4.86
(0.4516)
4.86
(0.4516)
5.56
(0.5161)
5.56
(0.5161)
5.56
(0.5161)
5.56
(0.5161)
6.25
(0.5806)
6.25
(0.5806)
6.25
(0.5806)
6.25
(0.5806)