Table PD-13 — Static Pressure Drops Through Accessories (Inches Water Column)
Unit
Tons
Model No.
12½
WC*150B
15
WC*180B
WCD240B
20
WCH240B
Notes:
1. OA = Outside Air and RA = Return Air.
2. Nominal KW ratings at 240, 480, 600 volts.
3. Tested with:2" filters 12½-20 tons.
4. Difference in pressure drop should be considered when utilizing optional 2" pleated filters.
* Indicates both downflow and horizontal units.
PKGP-PRC001-EN
Performance
Data
Standard
2 Inch
CFM
Filters
3
Pleated Filters
4000
0.05
0.08
5000
0.07
0.11
6000
0.11
0.15
4800
0.07
0.10
6000
0.11
0.15
7200
0.15
0.19
6400
0.07
0.11
8000
0.11
0.15
9600
0.16
0.02
6400
0.06
0.01
8000
0.09
0.13
9600
0.13
0.17
Economizer with
1
OA/RA Dampers
4
100% OA
100% RA
0.20
0.02
0.26
0.03
0.35
0.04
0.24
0.03
0.35
0.04
0.42
0.05
0.22
0.04
0.31
0.05
0.44
0.07
0.22
0.04
0.31
0.05
0.44
0.07
(12½ - 20 Tons)
Electric Heater
2
Accessory (kW)
5-12
14-23
36
—
0.03
0.03
—
0.04
0.05
—
0.06
0.07
—
0.04
0.04
—
0.06
0.07
—
0.09
0.10
—
—
0.06
—
—
0.10
—
—
0.14
—
—
0.06
—
—
0.10
—
—
0.14
54
72
0.04
—
0.06
—
0.09
—
0.05
—
0.08
—
0.12
—
0.08
0.09
0.12
0.14
0.17
0.20
0.08
0.09
0.12
0.14
0.17
0.20
21