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Sensible Cooling Capacity, BTUH/LF<br />
PRIMARY AIR COOLING SECONDARY (WATER) COOLING<br />
TOTAL SENSIBLE COOLING<br />
Cooling Performance (4-Pipe) DID301<br />
750<br />
700<br />
650<br />
Chart is based on 6 ft. DID301-US-4 (4<br />
pipe) cooling with a 20˚F temperature<br />
differential between room and primary air<br />
and an 18˚F temperature differential<br />
between room and entering chilled water.<br />
For other beam lengths, see the<br />
correction factors table below.<br />
600<br />
550<br />
500<br />
GPMCWS<br />
450<br />
400<br />
350<br />
GPMCWS<br />
1.5<br />
1.5<br />
1.0<br />
0.5<br />
0.3<br />
GPMCWS<br />
300<br />
1.0<br />
250<br />
1.5<br />
0.5<br />
0.3<br />
200<br />
1.0<br />
0.5<br />
150<br />
0.3<br />
"C" NOZZLES<br />
100<br />
NC<br />
0.2"<br />
20<br />
25 30 35 39<br />
0.3" 0.4" 0.5"<br />
0.6" 0.7" 0.8" 0.9" 1.0"<br />
50<br />
NC 15<br />
0.2"<br />
20<br />
0.3"<br />
25<br />
0.4"<br />
30<br />
0.5" 0.6"<br />
35<br />
37<br />
0.8" 1.0"<br />
"B" NOZZLES<br />
0<br />
NC 15 20 25 30 33<br />
0.3" 0.3" 0.4" 0.6" 0.8" 1.0"<br />
"A" NOZZLES<br />
2.0<br />
3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0<br />
Primary Airflow Rate, CFM/LF<br />
15.0<br />
Corrections for Other DID301-US-4 Lengths & T INDUCED AIR - T ENTERING WATER<br />
Performance Parameter<br />
Sensible Cooling (BTUH/LF)<br />
Max. Recommended GPM (DID301-US-4 models)<br />
Noise Level (NC)<br />
Primary Air Pressure Drop<br />
<strong>Beam</strong> Length (Nominal Length in Feet)<br />
4 Feet 6 Feet 8 Feet<br />
10 Feet<br />
Multiply by 1.02 No Correction Multiply by 0.97 Multiply by 0.95<br />
1.5 1.5 1.5<br />
1.5<br />
-1 No Correction +1<br />
+2<br />
Multiply by 0.74 No Correction Multiply by 1.03 Multiply by 1.07<br />
<strong>Chilled</strong> Water Pressure Loss See Figure 38 43<br />
TINDUCED AIR - TENTERING CHILLED WATER<br />
See Table 6 (page 38)<br />
Figure 54: 59: Cooling (4 Pipe) Performance, DID301-US-4<br />
58