Bryant 559K 08 Series Service And Maintenance Instructions page 40

Horizontal Economizer Barometric Relief
Horizontal Economizer Barometric Relief Flow
2500
2000
1500
1000
500
0
0.00 0.05 0.10 0.15
Return Duct Static Pressure (in. wg)
Horizontal Economizer Damper Leakage
Horizontal Economizer Damper Leakage
250
200
150
100
50
0
0.00 0.10 0.20 0.30
Static Pressure Delta (in. wg)
Fig. 61 — Economizer Barometric Relief and Damper Leakage — 15 Ton Units
7.5 to 12.5 Ton Units
Economizer Pressure drop, 7.5 To 12.5 Ton Units
0.70
0.60
0.50
0.40
0.30
0.20
0.10
0.00
0 1000 2000 3000
Return Duct Air Flow (cfm)
Vertical Economizer
0.20 0.25 0.30
0.40 0.50 0.60
4000 5000 6000 7000
Horizontal Economizer
Fig. 62 — Economizer Pressure Drop
Vertical Economizer Barometric Relief
Vertical Economizer Barometric Relief Flow
2500
2000
1500
1000
500
0
0.00 0.05
Return Duct Static Pressure (in. wg)
Vertical Economizer Damper Leakage
Vertical Economizer Damper Leakage
350
300
250
200
150
100
50
0
0.00 0.10
Economizer Pressure Drop, 15 Ton Units
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0 1000 2000
Return Duct Air Flow (cfm)
Vertical Economizer
40
0.10 0.15 0.20 0.25
0.20 0.30 0.40 0.50
Static Pressure Delta (in. wg)
15 Ton Units
3000 4000 5000 6000 7000
Horizontal Economizer
0.30
0.60
8000