Carrier WeatherExpert 48N2 Controls, Start-Up, Operation, Service, And Troubleshooting page 24

Packaged rooftop cooling units with gas heat, optional electric heat, or hydronic heat and comfortlink controls version 10.x
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COMPONENT
High-Capacity Evaporator Coil (75-90)
High-Capacity Evaporator Coil (105)
Humidi-MiZer
System (75-105)
®
Hydronic Coil (75-105)
Steam Coil (75-105)
Low Gas Heat (75-105)
Medium Gas Heat (75-105)
High Gas Heat (75-105)
Electric Heat (108 kW)
Electric Heat (108 kW,
High-Static Supply Fan)
Electric Heat (144 kW)
Electric Heat (144 kW,
High-Static Supply Fan)
Electric Heat (190 kW)
Electric Heat (190 kW,
High-Static Supply Fan)
Electric Heat (265 kW)
Electric Heat (265 kW,
High-Static Supply Fan)
FILTERS
Mixed Air Filters
4-in. MERV 8
4-in. MERV 14
Cartridge Filter with 2-in. Pre-Filter
Cartridge Filter with 4-in. Pre-Filter
MERV 14 Bag with 2-in. Pre-Filter
MERV 14 Bag with 4-in. Pre-Filter
MERV 15 Bag with 2-in. Pre-Filter
MERV 15 Bag with 4-in. Pre-Filter
Final Filters
Cartridge Filter with 2-in. Pre-Filter
Cartridge Filter with 4-in. Pre-Filter
MERV 15 Bag with 2-in. Pre-Filter
MERV 15 Bag with 4-in. Pre-Filter
HEPA with 2-in. Pre-Filter
HEPA with 4-in. Pre-Filter
Economizer Pressure Drop
High-Static PE Fan (off)
Standard PE Fan (90-105) (off)
Standard PE Fan (75) (off)
Outdoor Airflow Station
LEGEND
PE
— Power Exhaust
Table 19 — Component Pressure Drops (in. wg)
Sizes N, P, Q (75-105 Ton Nominal Capacity)
15,000
19,000
23,000
0.05
0.10
0.14
0.04
0.09
0.14
0.02
0.03
0.05
0.13
0.20
0.28
0.14
0.22
0.31
0.15
0.20
0.26
0.18
0.25
0.33
0.26
0.35
0.45
0.05
0.08
0.12
0.08
0.12
0.17
0.06
0.09
0.13
0.08
0.13
0.19
0.06
0.10
0.14
0.09
0.14
0.21
0.07
0.11
0.15
0.10
0.16
0.23
0.00
0.00
0.00
0.21
0.27
0.33
0.38
0.48
0.58
0.30
0.38
0.46
0.30
0.38
0.46
0.23
0.29
0.35
0.30
0.38
0.46
0.23
0.29
0.35
0.39
0.50
0.61
0.32
0.40
0.48
0.32
0.40
0.48
0.24
0.30
0.36
0.47
0.60
0.73
0.39
0.50
0.61
0.07
0.09
0.11
0.02
0.05
0.09
0.00
0.05
0.10
0.06
0.08
0.10
0.00
0.03
0.07
AIRFLOW (cfm)
27,000
31,000
35,000
0.18
0.22
0.26
0.19
0.24
0.28
0.09
0.17
0.25
0.37
0.46
0.57
0.41
0.51
0.63
0.33
0.41
0.49
0.42
0.51
0.62
0.56
0.67
0.80
0.16
0.21
0.27
0.24
0.32
0.41
0.18
0.23
0.30
0.27
0.35
0.45
0.19
0.26
0.33
0.29
0.39
0.50
0.21
0.28
0.36
0.32
0.43
0.55
0.00
0.00
0.00
0.39
0.44
0.50
0.68
0.78
0.88
0.54
0.62
0.70
0.54
0.62
0.70
0.41
0.47
0.53
0.54
0.62
0.70
0.41
0.47
0.53
0.71
0.82
0.92
0.57
0.65
0.74
0.57
0.65
0.74
0.43
0.49
0.55
0.85
0.98
1.11
0.71
0.82
0.92
0.15
0.19
0.24
0.12
0.15
0.19
0.13
0.17
0.21
0.13
0.15
0.20
0.09
0.11
0.14
24
39,000
43,000
47,000
0.29
0.32
0.34
0.32
0.36
0.40
0.39
0.54
0.70
0.68
0.80
0.93
0.75
0.88
1.02
0.58
0.68
0.78
0.73
0.85
0.98
0.94
1.09
1.24
0.34
0.42
0.50
0.51
0.63
0.75
0.38
0.46
0.55
0.56
0.69
0.83
0.41
0.51
0.61
0.62
0.76
0.91
0.46
0.56
0.67
0.68
0.84
1.00
0.00
0.00
0.00
0.56
0.61
0.67
0.98
1.08
1.18
0.78
0.86
0.94
0.78
0.86
0.94
0.59
0.65
0.71
0.78
0.86
0.94
0.59
0.65
0.71
1.03
1.13
1.24
0.82
0.91
0.99
0.82
0.91
0.99
0.62
0.68
0.74
1.23
1.36
1.48
1.03
1.13
1.24
0.29
0.35
0.41
0.24
0.30
0.35
0.25
0.30
0.35
0.25
0.29
0.36
0.17
0.20
0.23
52,000
0.37
0.44
0.91
1.10
1.21
0.92
1.15
1.45
0.62
0.93
0.68
1.02
0.75
1.12
0.82
1.24
0.00
0.74
1.30
1.04
1.04
0.78
1.04
0.78
1.37
1.09
1.09
0.82
1.64
1.37
0.50
0.44
0.44
0.43
0.28

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