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Table 1 — Physical Data
BASE UNIT 48/50MP 62L 70M 82N
NOMINAL CAPACITY (tons) 80 90 105
OPERATING WEIGHT (lb)
Base Unit (48MP/50MP) 16,810/16,550 18,060/17,800 22,660/22,400
Copper Condenser Coils 675 725 725
Exhaust Fan 1,675 1,775 2,375
COMPRESSORS Semi-Hermetic
Number of Refrigerant Circuits 22 2
Circuit (No. of Cylinders) A (6) B (6) A1 (6), A2 (4) B (6) A1 (6), A2 (4) B1 (6), B2 (6)
Model 06E −299 −299 −275, −250 −299 −265, −250 −265, −265
Oil Charge (pints) 19 19 19, 14 19 19, 14 19,19
Capacity Steps (%) 17,33,50,67,83,100 11,22,33,41,56,67,78,89,100 18,26,35,44,53,56,65,74,82,91,100
REFRIGERANT R-22
Operating Charge (lb), Sys 1/Sys 2 (Standard Coil) 78/78 85/82 85/82
Operating Charge (lb), Sys 1/Sys 2 (Alternate Coil) 83/83 94/85 92/88
CONDENSER COILS Grooved Tube (
3
⁄
8
-in. OD)
Quantity 44 4
Rows...Fins/in. 3...17 3...17 3...17
Total Face Area (sq ft) 116.7 128.3 128.3
EVAPORATOR COILS Smooth Tube (
5
⁄
8
-in. OD)
Quantity 22 2
Rows...Fins/in.
Standard 3...14 3...14 3...14
Alternate 4...14 4...14 4...14
Total Face Area (sq ft) 62.6 70.0 82.0
Refrigerant Feed
Device...No. per Circuit TXV...2 TXV...2 TXV...2
EVAPORATOR FANS
Forward Curved Fan
Motor Hp 30 40 40 50 40 50
Motor Frame Size 286T 324T 324T 326T 324T 326T
Efficiency at Full Load (%)
Standard Efficiency 92.4 93.0 93.0 93.0 93.0 93.0
High Efficiency 93.6 94.5 94.5 94.5 94.5 94.5
Fan Pulley Pitch Diameter (in.) 18.4 16.0 15.4 15.4 20.0 18.4
Motor Pulley Pitch Diameter (in.) 6.2 6.4 5.6 6.4 5.8 6.0
Fan Rpm 608 705 658 747 526 590
Belts Quantity...Model No. 3...BX128 4...BX124 5...BX124 5...BX124 5...BX115 6...BX112
Center Distance Range (in.) 42.1-46.1 43.1-48.2 43.1-48.2 43.1-48.2 35.4-40.2 35.4-40.2
Maximum Rpm 835 835 835 835 715 715
Air Foil Fan
Motor Hp 30 40 40 50 40 50
Motor Frame Size 286T 324T 324T 326T 324T 326T
Efficiency at Full Load (%)
Standard Efficiency 92.4 93.0 92.4 93.0 92.4 93.0
High Efficiency 93.6 94.5 93.6 94.5 93.6 94.5
Fan Pulley Pitch Diameter (in.) 11.0 12.4 12.4 9.1 12.5 12.5
Motor Pulley Pitch Diameter (in.) 7.4 9.4 9.4 7.5 6.9 7.5
Fan Rpm 1192 1337 1337 1442 966 1050
Belts Quantity...Model No. 3...B111 3...B120 3...B120 3...5VX1120 3...5VX1060 3...5VX1060
Center Distance Range (in.) 39.7-43.7 40.4-45.2 40.4-45.2 40.4-45.2 35.4-39.4 35.4-39.4
Maximum Rpm 1595 1595 1595 1595 1298 1298
Air Foil Fan (cont)
Motor Hp 50 60 60
Motor Frame Size 326T 364T 364T
Efficiency at Full Load (%)
Standard Efficiency 93.0 94.5 94.5
High Efficiency 94.5 95.4 95.4
Fan Pulley Pitch Diameter (in.) 9.1 8.1 11.0
Motor Pulley Pitch Diameter (in.) 7.5 7.1 7.1
Fan Rpm 1442 1534 1119
Belts Quantity...Model No. 3...5VX1120 4...5VX1080 4...5VX1030
Center Distance Range (in.) 40.4-45.2 39.4-44.9 34.4-39.1
Maximum Rpm 1595 1595 1298
CONDENSER FANS
Quantity...Diameter (in.) 6...30 6...30 6...30
Nominal Cfm 52,000 52,000 52,000
Motor Hp...Rpm 1...1140 1...1140 1...1140
SUPPLY FAN Forward Curve Airfoil Forward Curve Airfoil Forward Curve Airfoil
Nominal Cfm 32,000 32,000 36,000 36,000 42,000 42,000
Size (in.) 30.0 33.0 30.0 33.0 36.0 40.25
Maximum Allowable Rpm 835 1595 835 1595 715 1298
Shaft Diameter at Pulley (in.) 2.69 2.44 2.69 2.44 2.69 2.44
FURNACE SECTION (48MP Units Only)
Rollout Switch Cutout Temp (F) 190 190
Number of Burners 77
Burner Orifice Diameter (in. ...drill size) 0.136...29 0.136...29
Gas Input (Btuh) 342,000 342,000
Manifold Pressure (in. wg) — Natural Gas 3.3 3.3
Gas Valve Input Pressure Range
in. wg 5.5-13.5 5.5-13.5
psig 0.235-0.487 0.235-0.487
LOW HEAT (48MPD)/HIGH HEAT (48MPE)
Number of Sections 2/3 2/3
Gas Input(Btuh) Stage 1 515,000/770,000 515,000/770,000
Stage 2 685,000/1,025,000 685,000/1,025,000
Efficiency (Steady State %) 81/81 81/81
Temperature Rise Range (F) 10-40/20-50 5-35/10-40
Minimum Heating Airflow (cfm) 12,850/15,400 14,700/19,250
Field Gas Connection Size (in.) 22
FILTERS
Medium Efficiency (30%)
Pleated (Standard)
Quantity...Size (in.)
15...24 x 24 x 2,
5...24 x 12 x 2
15...24 x 24 x 2,
5...24 x 12 x 2
20...24 x 24 x 2,
5...24 x 12 x 2
High Efficiency (90%) Cartridge Filters
with Prefilters (Optional)
Quantity...Size (in.)
15...24 x 24 x 4,
5...24 x 12 x 4
15...24 x 24 x 4,
5...24 x 12 x 4
20...24 x 24 x 4,
5...24 x 12 x 4
Outdoor Air Inlet Screens Cleanable Aluminum
Quantity...Size (in.) 16...20 x 25 x 1 16...20 x 25 x 1 24...20 x 25 x 1
LEGEND
TXV — Thermostatic Expansion Valve
4