8
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
OPTIONAL POWER EXHAUST
Power Exhaust
Diameter (in.) 20 23
Wheel and Blade Type DWDI Forward Curve
Maximum Allowable Cfm 42,000 60,000
Maximum Allowable Speed (rpm) 1,200 1,200
Shaft Diameter at Pulley (in.) 1.75 1.75
High Static Power Exhaust
Diameter (in.) 36 40
Wheel and Blade Type DWDI Forward Curve DWDI Forward Curve
Maximum Allowable Cfm 42,000 60,000
Maximum Allowable Speed (rpm) 650 600
Shaft Diameter at Pulley (in.) 2.5 3
OPTIONAL RETURN FAN
Return Fan
Diameter (in.) 40 40
Wheel and Blade Type SWSI Plenum Airfoil SWSI Plenum Airfoil
Maximum Allowable Cfm 52,500 60,000
Maximum Allowable Speed (rpm) 1236 1236
Shaft Diameter at Pulley (in.) 2.5 2.5
High Static Return Fan
Diameter (in.) 45 50 56
Wheel and Blade Type SWSI Plenum Airfoil
Maximum Allowable Cfm 60,000 60,000 60,000
Maximum Allowable Speed (rpm) 850 780 720
Shaft Diameter at Pulley (in.) 3
MIXED AIR FILTERS
MERV 7 Pleated Filters 2 inch, MERV 7 2 inch, MERV 7
Quantity 28 28
Size (in.) 20x24x2 20x25x2
MERV 8 Pleated Filters 4 inch, MERV 8 4 inch, MERV 8
Quantity 28 28
Size (in.) 20x24x4 20x25x4
MERV 14 Pleated Filters 4 inch, MERV 14 4 inch, MERV 14
Quantity 28 28
Size (in.) 20x24x4 20x25x4
MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Cartridge Filters 12 inch, MERV 14 Cartridge Filters
Quantity
20 20
Size (in.) (15) 20x24x12, (5) 24x24x12 24x24x12
MERV 14 Bag, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Bag Filters 12 inch, MERV 14 Bag Filters
Quantity 20 20
Size (in.) (15) 20x24x12, (5) 24x24x12 24x24x12
MERV 15 Bag, 2 or 4-in. in Pre-Filters 19 inch, MERV 15 Bag Filters 19 inch, MERV 15 Bag Filters
Quantity 20 20
Size (in.) (15) 20x24x19, (5) 24x24x19 24x24x19
FINAL FILTERS
MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Cartridge Filters 12 inch, MERV 14 Cartridge Filters
Quantity 19 19
Size (in.) (14) 20x24x12, (5) 24x24x12 24x24x12
MERV 15 Bag, 2 or 4-in. in Pre-Filters 19 inch, MERV 15 Bag Filters 19 inch, MERV 15 Bag Filters
Quantity 19 19
Size (in.) (14) 20x24x19, (5) 24x24x19 24x24x19
MERV 17 HEPA, 2 or 4-in. in Pre-Filters 12 inch, MERV 17 HEPA Filters, 99.99% 12 inch, MERV 17 HEPA Filters, 99.99%
Quantity 19 19
Size (in.) (14) 24x12x12, (5) 24x24x12 24x24x12
OUTSIDE AIR SCREENS
Standard Hood (Motorized OA and Economizer
Options)
Aluminum Frame, Permanent
Quantity 12 Screens 16 Screens
Size (in.) 16 7/8 x 31 16 7/8 x 31
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
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