Carrier WEATHERMAKER 48AJ User Manual
Page 13
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Table 1 — Physical Data — 48AJ,AK,AW,AY Units
LEGEND
*Sizes 020-040: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper
portion.
Sizes 041-060: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have
intertwined evaporator coils.
†Rollout switch is manual reset.
UNIT 48AJ,AK,AW,AY
020
025
027
030
NOMINAL CAPACITY (tons)
20
25
27
30
BASE UNIT
See Operating Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR
Quantity ... Type (Ckt 1/Ckt 2)
2…SR*782AT/1…SR*782AE
1…SR*812AT, 1…SR*942AT/
1…SR*942AE
2 ... SR*942AT/1…SR*942AE
2…SR*782AT/2…SR*812AT
Number of Refrigerant Circuits
2
2
2
2
Oil (oz) (Ckt 1, Ckt 2)
Precharged
Precharged
Precharged
Precharged
REFRIGERANT TYPE
R-22
Operating Charge (lb-oz)
Circuit 1
26-8
33-8
35-8
29-0
Circuit 2
14-0
17-8
20-0
30-8
CONDENSER COIL*
Internally Enhanced,
3
/
8
″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity
1
1
1
1
Rows ... Fins/in.
2 ... 15
3 ... 15
3 ... 15
4 ... 15
Total Face Area (sq ft)
33.3
33.3
33.3
33.3
CONDENSER FAN
Propeller Type
Nominal Cfm
17,200
15,850
15,850
14,500
Quantity... Diameter (in.)
2 ... 30
2 ... 30
2 ... 30
2 ... 30
Motor Hp
1
1
1
1
EVAPORATOR COIL
Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.)
3
/
8
3
/
8
3
/
8
3
/
8
Rows ... Fins/in.
3 ... 15
3 ... 15
4 ... 15
4 ... 15
Total Face Area (sq ft)
31.7
31.7
31.7
31.7
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
5
10
15
10
15
20
10
15
20
Motor Frame Size
184T
215T
254T
184T
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 (in.)
4.8
4.4
5.7
4.8
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
5
/
8
1
1
/
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
9.5
9.1
8.7
Nominal Fan Shaft Diameter (in.)
1
15
/
16
1
15
/
16
1
15
/
16
1
15
/
16
Belt Quantity
1
1
2
1
1
2
2
2
2
2
2
2
Belt Type
BX56
BX50
5VX530
BX56
5VX570
5VX530
BX50
5VX530
5VX530
BX50
5VX530
5VX530
Belt Length (in.)
56
63
53
56
57
53
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)
677
895
1096
677
962
1106
819
1096
1187
884
1096
1187
FURNACE SECTION
Supply Line Pressure Range
5.0-in. wg min/13.5-in. wg max.
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)
0.24
0.24
0.24
0.24
Stage 2 (amps)
0.13
0.13
0.13
0.13
Gas Input (Btuh) Stage 1
(Low Heat/High Heat)
262,500/394,000
262,500/394,000
262,500/394,000
262,500/394,000
Stage 2
(Low Heat/High Heat)
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
MIXED-AIR FILTERS
Quantity ... Size (in.) Standard
10 ... 20 x 24 x 2
10 ... 20 x 24 x 2
10 ... 20 x 24 x 2
10 ... 20 x 24 x 2
Pleated
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
OUTDOOR-AIR FILTERS
Quantity...Size (in.)
8...16 x 25 x 2
4...20 x 25 x 2
POWER EXHAUST
Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels with Backdraft Dampers on Each Fan
Housing
Motor, Quantity...Hp
4...1
Fan, Diameter...Width (in.)
11 x 10
Al
— Aluminum
Cu
— Copper