YORK
Start-Up & Operation Guide | 5587001-YSG-A-520
11
Start-Up
NOTE:
If the unit is equipped with a power exhaust fan
or return air fan, refer to
through
for fan perfor-
mance for pulley and drive information.
12. Check the air balance.
a. Start the supply air blower motor.
b. Adjust the resistances in both the supply and
the return air duct systems to balance the
air distribution throughout the conditioned
space.
NOTE:
Job specifications may require that air balanc-
ing be completed by someone other than the
start-up contractor.
Table 1: Component Static Pressure Drops (iwg)
Component
SCFM
5,000
6,000
8,000 10,000 12,000 14,000 16,000 18,000 20,000
25 T
on
Evaporator Coil - Std. Capacity,
Std. Efficiency
0.14
0.18
0.28
0.41
0.55
-
-
-
-
Evaporator Coil - High Capacity, Std.
Efficiency and Std. Capacity, High
Efficiency
0.15
0.20
0.32
0.46
0.62
-
-
-
-
30 T
on
Evaporator Coil - Std. Capacity,
Std. Efficiency
0.16
0.22
0.36
0.51
0.69
-
-
-
-
Evaporator Coil - High Capacity, Std.
Efficiency and Std. Capacity, High
Efficiency
0.18
0.24
0.38
0.55
0.75
-
-
-
-
40 T
on
Evaporator Coil - Std. Capacity,
Std. Efficiency
-
-
0.21
0.30
0.40
0.51
0.64
0.77
0.91
Evaporator Coil - High Capacity, Std.
Efficiency and Std. Capacity, High
Efficiency
-
-
0.21
0.30
0.40
0.51
0.64
0.77
0.91
50 T
on
Evaporator Coil - Std. Capacity,
Std. Efficiency
-
-
0.21
0.30
0.40
0.51
0.64
0.77
0.91
Evaporator Coil - High Capacity, Std.
Efficiency and Std. Capacity, High
Efficiency
-
-
0.25
0.35
0.47
0.61
0.76
0.92
1.09
25–30 Ton Hot Gas Reheat (HGRH) Coil
0.11
0.13
0.27
0.39
0.53
-
-
-
-
40–50 Ton HGRH Coil
-
-
0.18
0.25
0.33
0.43
0.53
0.64
0.76
Return Air Opening
25–30T
Bottom, Top, Front, Sides
0.01
0.02
0.03
0.05
0.07
-
-
-
-
Bottom with ERW
0.01
0.01
0.03
0.04
0.06
-
-
-
-
Damper
0.01
0.02
0.03
0.05
0.07
-
-
-
-
40–50T
Bottom, Top, Front, Sides
-
-
0.01
0.02
0.03
0.04
0.05
0.06
0.08
Bottom with ERW
0.01
0.01
0.01
0.02
0.03
0.04
0.05
0.06
0.08
Damper
-
-
0.01
0.02
0.03
0.04
0.05
0.06
0.08
Exhaust Air Opening
25–30 Ton Hood and Damper
0.30
0.33
0.37
0.40
0.42
-
-
-
-
40–50 Ton Hood and Damper
-
-
0.19
0.22
0.25
0.28
0.30
0.32
0.34
Supply Air Opening
25–30T
Bottom
0.02
0.02
0.04
0.06
0.09
-
-
-
-
Side
0.02
0.02
0.04
0.06
0.09
-
-
-
-
All Discharges in Blank Section
0.01
0.01
0.02
0.03
0.05
-
-
-
-
40–50T
Bottom
-
-
0.02
0.03
0.05
0.06
0.08
0.10
0.13
Side
-
-
0.02
0.03
0.05
0.06
0.08
0.10
0.13
All Discharges in Blank Section
-
-
0.01
0.02
0.03
0.04
0.05
0.06
0.08
