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Table 22 — Electric Heater Data, Horizontal Heaters Used in EHS1 (cont)
39T
UNIT SIZE
HEATER
AREA
(Sq Ft)
NO. OF
CONTROL
STEPS
HEATER
COIL
kW
TEMP
RISE
(°F)
MIN COIL
FACE VEL
(Fpm)
POWER SUPPLY, 3-PHASE CIRCUITS
208 Volts
240 Volts
Total FLA
No. Sub-Ckts
MWG
Fuse
Total FLA
No. Sub-Ckts
MWG
Fuse
32
24.0
3
39
32
160
109
3
1/0
150
94
2
1
125
6
79
40
260
220
5
300
300
191
4
250
250
119
51
310
331
7
(2)250
500
287
6
500
400
133
50
350
370
8
(2)300
500
320
7
(2)250
400
8
166
60
370
461
10
(2)500
600
400
9
(2)350
500
199
62
425
553
12
(3)350
700
479
10
(2)500
600
239
67
475
664
14
(3)500
1000
575
12
(3)400
800
279
71
525
775
17
(4)400
1000
672
14
(3)500
1000
39
28.8
3
66
35
210
184
4
4/0
250
159
4
3/0
200
6
99
42
260
275
6
500
350
239
5
350
300
133
48
310
370
8
(2)300
500
320
7
(2)250
400
159
50
350
442
10
(2)400
600
383
8
(2)350
500
8
199
60
370
553
12
(3)350
700
479
10
(2)500
600
232
61
420
644
14
(3)500
1000
559
12
(3)350
700
299
68
490
830
18
(4)500
1200
720
15
(4)350
1000
332
70
525
922
20
(4)500
1200
799
17
(4)400
1000
49
38.1
3
79
32
210
220
5
300
300
191
4
250
250
6
99
38
220
275
6
500
350
239
5
350
300
133
43
260
370
8
(2)300
500
320
7
(2)250
400
159
43
310
442
10
(2)400
600
383
8
(2)350
500
199
48
350
553
12
(3)350
700
479
10
(2)500
600
8
299
60
420
830
18
(4)500
1200
720
15
(4)350
1000
359
65
460
997
21
(5)400
1600
864
18
(4)500
1200
432
70
515
1200
25
(6)400
1600
1040
22
(5)500
1600
61
48.8
3
79
32
160
220
5
300
300
191
4
250
250
6
119
37
210
331
7
(2)250
500
287
6
500
400
133
40
220
370
8
(2)300
500
320
7
(2)250
400
159
40
260
442
10
(2)400
600
383
8
(2)350
500
199
42
310
553
12
(3)350
700
479
10
(2)500
600
239
37
420
664
14
(3)500
1000
575
12
(3)400
800
8
359
61
425
1108
24
(5)500
1600
960
20
(5)400
1200
498
50
650
1383
29
(6)500
N/A
1199
25
(6)400
1600
74
59.1
3
79
27
160
220
5
300
300
191
4
250
250
6
119
31
210
331
7
(2)250
500
287
6
500
400
133
33
220
370
8
(2)300
500
320
7
(2)250
400
159
37
230
442
10
(2)400
600
383
8
(2)350
500
199
41
260
553
12
(3)350
700
479
10
(2)500
600
8
299
46
350
830
18
(4)500
1200
720
15
(4)350
1000
399
58
370
1108
24
(5)500
1600
960
20
(5)400
1200
465
60
420
1291
27
(6)500
N/A
1119
24
(5)500
1600
92
73.0
6
133
36
160
370
8
(2)300
500
320
7
(2)250
400
166
33
220
461
10
(2)500
600
400
9
(2)350
500
199
38
230
553
12
(3)350
700
479
10
(2)500
600
266
45
260
739
16
(4)350
1000
640
11
(3)500
800
8
332
47
310
922
20
(4)500
1200
799
17
(4)400
1000
518
54
420
1438
N/A
N/A
N/A
1247
26
(6)500
1600
565
57
430
1569
N/A
N/A
N/A
1360
29
(6)500
N/A
678
64
460
1882
N/A
N/A
N/A
1632
N/A
N/A
N/A
LEGEND
ARI
— Air Conditioning & Refrigeration Institute
FLA
— Total Full Load Amps of Electric Heating Coils
Fuse
— External Fuse Size Required Per Circuit
kW
— Kilowatt Rating
MWG — Minimum Wire Gage
VEL
— Velocity
NOTES:
1. Subcircuits are internal heater circuits of 48 A or less ampacity.
2. Minimum wire gage is based on 75 C copper conductors; 3 conductors per
circuit.
IMPORTANT: To avoid damage from overheating, coils must not be op-
erated at less than minimum airflow (cfm).
Minimum Cfm = Coil Face Area x Minimum Coil Face Velocity
3. Electric heat performance is not within the scope of ARI Standard 430
certification.
4. All ratings shown are at 60 Hz. To obtain kW ratings at 50 Hz when voltage
does not change, multiply the 60 Hz rating by 0.833. For example, a 6-step
heater in a size 32 unit has a rating of 119 kW at 60 Hz. To obtain the
50 Hz rating:
119 x 0.833 = 99 kW at 50 Hz
If the voltage also varies from that shown in the table, use the formula in the
following example to arrive at the correct rating at the new voltage before
multiplying by 0.833:
Given:
2
V
2
( )
kW
2
= kW
1
V
1
Where kW
1
= 60 Hz rating
kW
2
= 50 Hz rating
V
1
= 60 Hz voltage
V
2
= 50 Hz voltage
Example:
2
450
kW
2
= 119
( )
480
kW
2
= 105
105 x 0.833 = 87 kW at 450 v, 50 Hz
208-, 240- and 480-V
208- and 600-V
Heaters.
Heaters.
69
Summary of Contents for 39T
Page 43: ...Fig 34 Discharge Fabrication Draw Thru Plenum Fans 43 ...
Page 49: ...Fig 41 Coil Connections and Lifting Points Fig 42 Steam Coil PIping 49 ...
Page 78: ...Fig 64 Blow Thru Unit Coil Removal Fig 65 Plan View Typical Coil 78 ...
Page 81: ...Fig 68 Filter Arrangement 2 in and 4 in Flat 81 ...
Page 82: ...Fig 68 Filter Arrangement 2 in and 4 in Flat cont 82 ...
Page 83: ...Fig 69 Filter Arrangement Angle Filters 2 in Only 83 ...
Page 84: ...Fig 69 Filter Arrangement Angle Filters 2 in Only cont 84 ...
Page 85: ...Fig 70 Filter Arrangement BCF1 Bag or Cartridge Draw Thru 85 ...
Page 86: ...Fig 70 Filter Arrangement BCF1 Bag or Cartridge Draw Thru cont 86 ...
Page 87: ...Fig 71 Filter Arrangement BCF3 Bag or Cartridge Blow Thru 87 ...
Page 88: ...Fig 71 Filter Arrangement BCF3 Bag or Cartridge Blow Thru cont 88 ...
Page 92: ...NOTE A frame shown shaded Fig 74 Fan Discharge Positions 92 ...
Page 102: ......
Page 103: ......