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Table 1B — Physical Data — 48EJ,EK,EW,EY Units
*Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion.
Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils.
†Motor and drive shown will deliver approximately 2.5 in. wg net external static. For more information, see Table 3.
**Rollout switch is manual reset.
NOTE: High heat is for 48EJ,EW only.
UNIT 48EJ,EK,EW,EY
024D/E
028D/E
030D/E
034D/E
NOMINAL CAPACITY (tons)
20
25
27.5
30
OPERATING WEIGHT (lb)
For Operating Weights see Table 2.
COMPRESSOR
Type Ckt 1
06D328
06D328
06D537
06D537
Ckt 2
06D818
06D328
06D328
06D537
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
25-0
25-0
Circuit 2
31-0
25-0
25-0
25-0
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 (1075 Rpm)
1
1
1
1
EVAPORATOR COIL
Cross-Hatched
3
/
8
″
Copper Tubes, Aluminum Plate Fins, Intertwined Circuits
Rows...Fins/in.
4...15
4...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...20x15
2...20x15
2...20x15
2...20x15
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 (Standard)
S184T
S215T
D254T
S213T
S215T
D254T
S215T
D254T
S256T
S215T
D254T
S256T
(High Efficiency)
S184T
S215T
S254T
S213T
S215T
S254T
S215T
S254T
S256T
S215T
S254T
S256T
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
5
/
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...Type
1...BX56
2...BX50
2...5VX530
1...BX56
1...5VX570 2...5VX530
2...BX50
2...5VX500 2...5VX530
2...BX50
2...5VX530 2...5VX530
Belt, Length (in.)
56
50
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
15.0-17.9
15.6-18.4
15.0-17.9
15.6-18.4
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 (amps)
Stage 1
0.1
0.1
0.1
0.1
Stage 2
0.1
0.1
0.1
0.1
Gas Input (Btuh)
Stage 1 Low
265,600
265,600
265,600
265,600
High
398,400
398,400
398,400
398,400
Stage 2 Low
350,000
350,000
350,000
350,000
High
525,000
525,000
525,000
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
Gas Pressure to Unit Range (in. wg)
5-13.5
5-13.5
5-13.5
5-13.5
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
Field Gas Connection Size
(in.-FPT)
1.5
1.5
1.5
1.5
HIGH-PRESSURE SWITCH (psig)
Cutout
426
426
426
426
Reset (Auto.)
320
320
320
320
LOW-PRESSURE SWITCH (psig)
Cutout
7
7
7
7
Reset (Auto.)
22
22
22
22
RETURN-AIR FILTERS (W x H x T)
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
POWER EXHAUST
Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward Curved Fan
Motor, Quantity...Hp
4...1
Fan, Diameter...Width (in.)
11...10
Summary of Contents for WEATHERMAKER 48AJ020
Page 3: ...3 Fig 1 Roof Curb 48AJ AK020 030 and 48EJ EK024 034 Units ...
Page 4: ...4 Fig 2 Roof Curb 48AJ AK034 050 and 48EJ EK038 048 Units ...
Page 5: ...5 Fig 3 Roof Curb 48AJ AK060 and 48EJ EK054 068 Units ...
Page 97: ...97 Fig 78 Typical 48EK VAV 24 V Control Circuit ...
Page 99: ...99 Fig 80 Typical 48EK VAV 115 V Control Circuit ...
Page 100: ...100 Fig 81 Typical 48EJ CV 115 V Control Circuit ...
Page 101: ...101 Fig 82 Label Diagram Staged Gas Heat 48AJ AK AW AY020 050 and 48EJ EK EW EY024 048 Units ...
Page 102: ...102 Fig 83 Label Diagram Staged Gas Heat 48AJ AK AW AY060 and 48EJ EK EW EY054 068 Units ...