Blower Data - Westinghouse WHM24DMA21S Service Manual

Blower data

Airflow performance data is based on cooling performance with a coil and no filter in place. Check
the performance table for appropriate unit size selection. External static pressure should stay within
the minimum and maximum limits shown in the table below to ensure proper cooling, heating, and
electric heating operation.
NOTES:
• Required 350-450 CFM/Ton range.
• When there is an electric heater, set the fan speed based on the air volume that the electric
heater needs (not less than 350 CFM/Ton).
• Airflow based upon air handler unit operates at 230 V with no electric heater kit and no filter.
Airflow at 208 V is approximately the same as 230 V.
¢ Model: WHM24DMA21S
Fan speed
Tap (2)
Default setting
Tap (3)
Tap (4)
Tap (5)
¢ Model: WHM36DMA21S
Fan speed
Tap (2)
Default setting
Tap (3)
Tap (4)
Tap (5)
0 0.1
(0) (0.02)
CFM 815 792
W 94 102
CFM 862 828
W 106 114
CFM — —
W — —
CFM — —
W — —
0 0.1
(0) (0.02)
CFM 1,264 1,216
W 215 222
CFM 1,350 1,314
W 257 264
CFM — —
W — —
CFM — —
W — —
External static pressure
in.H2O [KPa]
0.18 0.3 0.4
(0.045) (0.07) (0.1)
752 709 —
110 123 —
792 735 705
125 137 145
— 859 853
— 178 185
— — —
— — —
External static pressure
in.H2O [KPa]
0.18 0.3 0.4
(0.045) (0.07) (0.1)
1,172 1,135 1,096
233 238 244
1,269 1,206 1,116
274 282 292
— 1,323 1,266
— 304 313
— — 1,350
— — 371
- 19 -
0.5 0.6 0.7
(0.12) (0.15) (0.17)
— — —
— — —
— — —
— — —
803 769 735
193 203 213
895 864 825
241 251 258
0.5 0.6 0.7
(0.12) (0.15) (0.17)
— — —
— — —
1,082 1,050 —
297 302 —
1,192 1,122 1,060
323 333 340
1,292 1,221 1,148
381 394 401
0.8
(0.20)
—
—
—
—
—
—
779
267
0.8
(0.20)
—
—
—
—
—
—
1,088
406