54
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RETURN DUCT STATIC PRESSURE (in. wg)
RELIEF FLOW (CFM)
3 -6 Ton
7½ - 12½ Ton
Vertical Economizers
C08073
Fig. 15 -- Barometric Relief Flow Capacity
0
5
10
15
20
25
30
0.00 0.10 0.20 0.30 0.40 0.50
STATIC PRESSURE DELTA (in. wg)
LEAKAGE ACROSS DAMPER (CFM)
3 - 6 Ton
7 1/2 - 12 1/2 Ton
Vertical Economizers
C08074
Fig. 16 -- Outdoor Air Damper Leakage
0
1000
2000
3000
4000
5000
6000
0 0.1 0.2 0.3 0.4
RETURN DUCT STATIC PRESSURE DROP (in. wg)
RETURN AIR FLOW (CFM)
3 - 6 TON
7 1/2 - 12 1/2 Ton
Vertical Economizers
C08075
Fig. 17 -- Retu rn Air Pressu re Dro p
0
1000
2000
3000
4000
5000
0 0.1 0.2 0.3 0.4 0.5
RETURN DUCT STATIC PRESSURE (in. wg)
EXHAUST AIRFLOW
(cfm)
Vertical Power Exhaust
2 - 6 Ton
7.5 - 15 Ton
101125
Fig. 18 -- Vertical Power Exhaust Performance
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RELIEF FLOW (CFM)
RETURN DUCT STATIC PRESSURE (in. wg)
15 -Ton
Horizontal Economizers
C101120
Fig. 19 -- Barometric Relief Flow--Horizontal 15 Ton
0
1000
2000
3000
4000
5000
6000
0 0.1 0.2 0.3 0.4
RETURN AIR FLOW (CFM)
RETURN DUCT STATIC PRESSURE DROP (in. wg)
15 -Ton
Horizontal Economizers
C101121
Fig. 20 -- Return Air Pressure Drop -- Horizontal 15 Ton
0
500
1000
1500
2000
2500
0 0.05 0.1 0.15 0.2 0.25 0.3
RELIEF FLOW (CFM)
RETURN DUCT STATIC PRESSURE (in. wg)
15 -Ton
Vertical Economizers
C101122
Fig. 21 -- Bar ometric Relief Flow--Vertical 15 Ton
580J