Carrier 48AJ User Manual
Page 21
21
Table 1A — Physical Data — 48AJ,AK,AW,AY Units
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
020D/E
025D/E
027D/E
030D/E
NOMINAL CAPACITY (tons)
20
25
27
30
BASE UNIT OPERATING WEIGHT (lb)
See Operating Weights Table 2.
COMPRESSOR
Quantity...Type (Ckt 1 , Ckt 2)
1...06D328, 1...06D818
2...06D328
2...06D328
1...06D537, 1…06D328
Number of Refrigerant Circuits
2
2
2
2
Oil (oz) (Ckt 1 , Ckt 2)
115, 88
115 ea.
115 ea.
115 ea.
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Circuit 1
25-0
25-0
29-0
27-0
Circuit 2
31-0
25-0
28-0
29-0
CONDENSER COIL *
Cross-Hatched
3
/
8
" Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity
1
1
1
1
Rows...Fins/in.
4...15
4...15
4...15
4...15
Total Face Area (sq ft)
33.3
33.3
33.3
33.3
CONDENSER FAN
Propeller Type
Nominal Cfm
13,420
13,420
13,420
13,420
Quantity...Diameter (in.)
2...30
2...30
2...30
2...30
Motor Hp
1
1
1
1
EVAPORATOR COIL
Cross-Hatched Copper Tubes, Aluminum Plate Fins
Tube Size (in.)
3
/
8
3
/
8
3
/
8
3
/
8
Rows...Fins/in.
4...15
4...15
4...15
4... 5
Total Face Area (sq ft)
31.7
31.7
34.7
34.7
EVAPORATOR FAN
Centrifugal Type
Quantity...Size (in.)
2...20 X 15
2... 20 X 15
2... 20 X 15
2... 20 X 15
Type Drive
Belt
Belt
Belt
Belt
Nominal Cfm
8,000
10,000
11,000
12,000
Motor Hp
5
10
15
7.5
10
15
10
15
20
10
15
20
Motor Frame Size
184T
215T
254T
213T
215T
254T
215T
254T
256T
215T
254T
256T
Motor Bearing Type
Ball
Ball
Ball
Ball
Maximum Allowable Rpm
1200
1200
1200
1200
Motor Pulley Pitch Diameter
4.9
4.4
5.7
5.4
6.1
5.5
4.4
4.9
5.9
4.4
5.7
5.9
Nominal Motor Shaft Diameter (in.)
1
1
/
8
1
3
/
8
1
3
/
8
1
3
/
8
1
3
/
8
1
5
/
8
1
3
/
8
1
5
/
8
1
5
/
8
1
3
/
8
1
5
/
8
1
5
/
8
Fan Pulley Pitch Diameter (in.)
12.4
8.6
9.1
12.4
11.1
8.7
9.4
8.1
8.7
9.0
9.1
8.7
Nominal Fan Shaft Diameter (in.)
1
15
/
16
1
15
/
16
1
15
/
16
1
15
/
16
Belt Quantity
1
2
2
1
1
2
2
2
2
2
2
2
Belt Type
BX56
BX50
5VX530
BX56
5VX590
5VX570
BX50
5VX500
5VX530
BX50
5VX530
5VX530
Belt Length (in.)
56
63
53
56
59
57
50
50
53
50
53
53
Pulley Center Line Distance (in.)
16.0-18.7
15.6-18.4
15.0-17.9
15.6-18.4
15.6-18.4
15.0-17.9
15.6-18.4
15.0-17.9
15.0-17.9
15.6-18.4
15.0-17.9
15.0-17.9
Factory Speed Setting (rpm)
717
924
1096
773
962
1106
848
1059
1187
884
1096
1187
FURNACE SECTION
Rollout Switch Cutout
Temp (F) †
225
225
225
225
Burner Orifice Diameter (in. ...drill size)
Natural Gas
Std
.111...34
.111...34
.111...34
.111...34
Liquid Propane
Alt
.089...43
.089...43
.089...43
.089...43
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
262,500/394,000
262,500/394,000
262,500/394,000
262,500/394,000
Stage 2
350,000/525,000
350,000/525,000
350,000/525,000
350,000/525,000
Efficiency (Steady State) (%)
82
82
82
82
Temperature Rise Range
15-45/35-65
15-45/35-65
15-45/35-65
15-45/35-65
Manifold Pressure (in. wg)
Natural Gas
Std
3.5
3.5
3.5
3.5
Liquid Propane
Alt
3.5
3.5
3.5
3.5
Gas Valve Quantity
2
2
2
2
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
10...20 x 24 x 2
OUTDOOR AIR FILTERS
8...16 x 25
8...16 x 25
8...16 x 25
8...16 x 25
Quantity...Size (in.)
4...20 x 25
4...20 x 25
4..20 x 25
4...20 x 25
Al
—
Aluminum
Bhp —
Brake Horsepower
Cu
—
Copper