Carrier WeatherExpert 48N2 - Page 7

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Table 1 — Physical Data 48N — 75-150 Tons Nominal Capacity (cont)
LEGEND
* Base unit includes: economizer dampers and hoods, filter tracks less filters, evaporator coil
mounting less the evaporator, extended plenum, and standard efficiency condenser. For 75-105
nominal ton units only, base unit weight also includes the short supply fan section.
BASE UNIT (Model Number - Pos. 6)
* †
N P Q R S T
NOMINAL CAPACITY (tons) 75 90 105 120 130 150
HUMIDI-MIZER
®
COIL
Type MCHX
Material Aluminum
Quantity 1
Surface E-Coated
Total Face Area (sq ft) 34.5 43 43 43 43 43
STANDARD AND HIGH CAPACITY HOT WATER COILS
Type RTPF
Material Aluminum Fin, Copper Tube
Quantity 2
Tube Type Smooth
Rows (each) 2
FPI 12
Total Face Area (sq ft) 22.4 26.4
STANDARD AND HIGH CAPACITY STEAM COIL
Type RTPF
Material Aluminum Fin, Copper Tube, Steel Header, Sloped Casing
Quantity 2
Tube Type Smooth
Connection Size, Length (in.) 2.50, 3.00
Total Face Area (sq ft) 40.1 49.0
HEATING SECTION LOW (48N ONLY)
Heating Section 2 2 2 3 3 3
Number of Heat Exchangers 18 18 18 27 27 27
Output (MBtuh) 648 648 648 972 972 972
Temperature Rise Range (F) 10-40 10-40 10-40 15-45 15-45 15-45
Efficiency (%) 81 81 81 81 81 81
Burner Orifice Quantity, Diameter (in.), Drill No. 18, 0.1285, 30 18, 0.1285, 30 18, 0.1285, 30 27, 0.1285, 30 27, 0.1285, 30 27, 0.1285, 30
Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1 3.1
Line Pressure (in. wg) (min...max) 5.8-11 5.8-11 5.8-11 6.2-11 6.2-11
6.2-11
Fi
ring Stages (Standard) 2 2 2 2 2 2
Firing Stages (Modulating) 14-100% 14-100% 14-100% 9-100% 9-100% 9-100%
Number of Gas Valves 2 2 2 3 3 3
HEATING SECTION MED (48N ONLY)
Heating Section
NA
3 3 4 4 4
Number of Heat Exchangers 27 27 36 36 36
Input/Output (MBtuh) 972 972 1296 1296 1296
Temperature Rise Range (F) 20-50 20-50 20-50 20-50 20-50
Efficiency (%) 81 81 81 81 81
Burner Orifice Quantity, Diameter (in.), Drill No. 27, 0.1285, 30 27, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30
Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1
Line Pressure (in. wg) (min...max) 6.3-11 6.3-11 6.2-11 6.2-11 6.2-11
Firing Stages (Standard) 2 2 2 2 2
Firing Stages (Modulating) 9-100% 9-100% 7-100% 7-100% 7-100%
Number of Gas Valves 3 3 4 4 4
HEATING SECTION HIGH (48N ONLY)
Heating Section 3 4 4 5 5 5
Number of Heat Exchangers 27 36 36 45 45 45
Input/Output (MBtuh) 972 1296 1296 1620 1620 1620
Temperature Rise Range (F) 20-50 25-65 25-65 25-55 25-55 25-55
Efficiency (%) 81 81 81 81 81 81
Burner Orifice Quantity, Diameter (in.), Drill No. 27, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30 45, 0.1285, 30 45, 0.1285, 30 45, 0.1285, 30
Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1 3.1
Line Pressure (in. wg) (min...max) 6.3-11 6.3-11 6.3-11 6.2-11 6.2-11 6.2-11
Firing Stages (Standard) 2 2 2 2 2 2
Firing Stages (Modulating) 9-100% 7-100% 7-100% 5-100% 5-100% 5-100%
Number of Gas Valves 3 4 4 5 5 5
SUPPLY FAN
Standard Supply Fan
Diameter (in.) 28 32
Wheel and Blade Type DWDI Airfoil DWDI Airfoil
Maximum Allowable Cfm 42,000 60,000
Maximum Allowable Speed (rpm) 1,800 1,550
Shaft Diameter at Pulley (in.) 2.25 2.5
High Static Supply Fan
Diameter (in.) 40 40
Wheel and Blade Type DWDI Airfoil DWDI Airfoil
Maximum Allowable Cfm 52,500 60,000
Maximum Allowable Speed (rpm) 1,250 1,250
Shaft Diameter at Pulley (in.) 3 3
Cu-Al — Copper-to-Aluminum
DWDI — Double Width Double Inlet
FPI — Fins per Inch
MBtuh — Btuh in Thousands
MCHX — Microchannel Heat Exchanger
RTPF — Round Tube Plate Fin
SWSI — Single Width Single Inlet
†
48
N2 D
N
6 0 Option Code
Factory Options48 – Cooling Unit with Gas Heat
Configuration
Design Revision Level
Voltage Options
1 – 575-3-60
Heat and Chassis Options
6 – 460-3-60
Unit Size – Nominal Tons
N – 75
P – 90
Q – 105
R – 120
S – 130
T – 150