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Table 1A — Physical Data — 48AJ,AK,AW,AY Units (cont)
LEGEND *Sizes 020-030: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper
portion.
Sizes 035-050: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have
intertwined evaporator coils.
†Rollout switch is manual reset.
NOTE: High heat is for 48AJ,AW only.
UNIT 48AJ,AK,AW,AY 035D/E 040D/E 050D/E 060D/E
NOMINAL CAPACITY (tons) 35 40 50 60
BASE UNIT OPERATING WEIGHT (lb) See Operating Weights Table 2.
COMPRESSOR
Quantity...Type (Ckt 1 , Ckt 2) 2...06D537 1...06D537, 1...06EA250 2…06EA250 2...06EA265
Number of Refrigerant Circuits 2222
Oil (oz) (Ckt 1 , Ckt 2) 115 ea. 115, 224 224 ea. 304 ea.
REFRIGERANT TYPE
Operating Charge (lb-oz)
Circuit 1 34-8 51-8 50-0 79-8
Circuit 2 34-8 49-8 50-0 79-8
CONDENSER COIL * Cross-Hatched
3
/
8
" Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity 2222
Rows...Fins/in. 3...15 4...15 4...15 4…15
Total Face Area (sq ft) 58.3 66.7 66.7 100
CONDENSER FAN Propeller Type
Nominal Cfm 27,064 27,064 27,064 43,900
Quantity...Diameter (in.) 4...30 4...30 4...30 6...30
Motor Hp 1111
EVAPORATOR COIL Cross-Hatched Copper Tubes, Aluminum Plate Fins
Tube Size (in.)
3
/
8
1
/
2
1
/
2
1
/
2
Rows...Fins/in. 4...15 6...15 6...15 4...17
Total Face Area (sq ft) 34.7 31.3 31.3 48.1
EVAPORATOR FAN Centrifugal Type
Quantity...Size (in.) 2...20 X 15 2...20 X 15 2...20 X 15 3...20 X 15
Type Drive Belt Belt Belt Belt
Nominal Cfm 14,000 16,000 20,000 24,000
Motor Hp 10 15 20 15 20 25 20 25 30 25 30 40
Motor Frame Size 215T 254T 256T 254T 256T 284T 256T 284T 286T 284T 286T 324T
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 1200 1200 1300 1200
Motor Pulley Pitch Diameter 6.1 5.3 5.7 5.3 5.7 7.5 6.3 8.1 7.5 5.3 8.1 9.4
Nominal Motor Shaft Diameter (in.) 1
3
/
8
1
5
/
8
1
5
/
8
1
5
/
8
1
5
/
8
1
7
/
8
1
5
/
8
1
7
/
8
1
7
/
8
1
7
/
8
1
7
/
8
2
1
/
8
Fan Pulley Pitch Diameter (in.) 13.7 9.5 9.5 9.5 9.5 11.1 11.1 12.5 11.1 9.1 12.5 13.6
Nominal Fan Shaft Diameter (in.) 1
15
/
16
1
15
/
16
1
15
/
16
1
15
/
16
Belt Quantity 122222222332
Belt Type 5VX610 5VX530 5VX550 5VX530 5VX550 5VX590 5VX570 5VX630 5VX590 5VX530 5VX630 5VX650
Belt Length (in.) 61 53 55 53 55 59 57 63 59 53 63 65
Pulley Center Line Distance (in.) 15.6-18.4 15.0-17.9 15.0-17.9 15.0-17.9 15.0-17.9 14.6-17.6 15.0-17.9 14.6-17.6 14.6-17.6 15.2-17.5 14.7-17.2 14.2-17.0
Factory Speed Setting (rpm) 779 976 1050 976 1050 1182 993 1134 1182 1019 1134 1214
FURNACE SECTION
Rollout Switch Cutout
Temp (F) † 225 225 225 225
Burner Orifice Diameter (in. ...drill size)
Natural Gas Std .120...31 .120...31 .120...31 .120...31
Liquid Propane Alt .096...41 .096...41 .096...41 .096...41
Thermostat Heat Anticipator Setting
Stage 1 (amps) 0.1 0.1 0.1 0.1
Stage 2 (amps) 0.1 0.1 0.1 0.1
Gas Input (Btuh) Stage 1 300,000/600,000 300,000/600,000 300,000/600,000 582,000/ 873,000
S ta ge 2 400,000/800,000 400,000/800,000 400,000/800,000 776,000/1,164,000
Efficiency (Steady State) (%) 82 82 82 82
Temperature Rise Range 10-40/30-60 10-40/30-60 10-40/30-60 10-40/30-60
Manifold Pressure (in. wg)
Natural Gas Std 3.5 3.5 3.5 3.3
3.3 Liquid Propane Alt 3.5 3.5 3.5
Gas Valve Quantity 2223
HIGH-PRESSURE SWITCH (psig)
Cutout 426 426 426 426
Reset (Auto.) 320 320 320 320
LOW-PRESSURE SWITCH (psig)
Cutout 27 27 27 27
Reset (Auto.) 67 67 67 67
RETURN-AIR FILTERS
Quantity...Size (in.) 10...20 x 24 x 2 10...20 x 24 x 2 10...20 x 24 x 2 16...20 x 24 x 2
OUTDOOR AIR FILTERS 8...16 x 25 8...16 x 25 8...16 x 25 12...16 x 25
Quantity...Size (in.) 4...20 x 25 4...20 x 25 4...20 x 25 6...20 x 25
Al — Aluminum
Bhp — Brake Horsepower
Cu — Copper