Model 4
1500 - 6000 MBTU/hr
Rev. 03-08
Section B2-11
Table B2-3. Model 4 Steam Ratings
Boiler SIZE
1500
2000
2500
3000
3500
4000
4500
5000
6000
Ratings [Note A]
Rated Capaci ty - Steam (lbs . s team/hr
from & at 212
o
F.)
1,237
1,649
2,062
2,474
2,887
3,299
3,711
4,124
4,949
Rated Steam Capaci ty [kg/hr from and at
100 C ]
461.7
615.5
769.6
923.4
1,077.5
1,231.3
1,385.0
1,539.2
1,847.2
Output Btu/hr [1,000 Btu/h]
1,200
1,600
2,000
2,400
2,800
3,200
3,600
4,000
4,800
Output Kcal/Hr [1,000 Kcal/h]
302
403
504
605
706
806
907
1,007
1,210
Output KW
348
464
580
696
812
928
1,044
1,160
1,392
Approximate Fuel C onsumption At Rated C apacity [ Input - N ote B]
Natural Gas [ft
3
/hr] - 15# Steam
1,511
1,538
2,500
3,038
3,487
4,025
4,494
5,050
6,052
Natural Gas [ft
3
/hr] - 150# Steam
1,572
2,133
2,597
3,117
3,590
4,155
4,657
5,194
6,233
Natural Gas [m
3
/hr] - 15# Steam
42.8
43.5
70.8
86
98.7
114.0
127.0
143.0
171.4
Natural Gas [m
3
/hr] - 150# Steam
44.5
60.4
73.5
88.3
101.6
117.6
131.8
147.0
176.5
Propane Gas [ft
3
/hr] - 15# Steam
604
615
1,000
1,215
1,395
1,610
1,798
2,020
2,421
Propane Gas [ft
3
/hr] - 150# Steam
629
853
1,039
1,247
1,436
1,662
1,863
2,078
2,493
Propane Gas [m
3
/hr] - 15# Steam
17
17.4
28.3
34.4
39.5
45.6
51
57.2
68.5
Propane Gas [m
3
/hr] - 150# Steam
17.8
24.1
29.4
35.3
40.7
47
52.7
58.8
70.6
No.2 Oil Fuel - 15# Steam, gph
10
14
17
21
24
28
31
35
42
No.2 Oil Fuel - 150# Steam, gph
11
15
18
22
25
28.9
32
36
43
No.2 Oil Fuel - 15# Steam, liters/hour
38
53
64
79
91
106
117
132
159
No.2 Oil Fuel - 150# Steam, liters/hour
41
56
68
82
95
109
121
136
163
Pow er Requirements - 3 Phase 60 Hz Standard [Note C]
Blower Motor HP - Gas Firing
3/4
1
1-1/2
2
2
3
3
3
5
Blower Motor HP - Oil or Combinati on
1-1/2
1-1/2
2
2
3
5
3
3
5
Oil Pump for Oil or C ombination
Belt Driven from the Blower Motor
Minimum Ampacity
Blower Motor - Gas Firing Only, 230V
1.53
3.3
4.7
6
6
9
9
9
15
Blower Motor - Gas Firing Only, 460V
0.77
1.7
2.4
3
3
4.5
4.5
4.5
7.5
Blower Motor - Oil or Combination, 230V
4.7
4.7
6
6
9
15
9
9
15
Blower Motor - Oil or Combination, 460V
2.4
2.4
3
3
4.5
7.5
4.5
4.5
7.5
Control C irc ui t
1.7
1.7
1.7
1.9
1.9
1.9
2.4
2.4
2.4
Weights
Operating W eight, lbs .
3,758
3,758
4,566
4,566
5,175
5,175
5,991
5,991
6,900
Operating W eight, k g
1,399
1,399
1,704
1,704
1,932
1,932
2,236
2,236
2,575
Water C ontent Normal, gallons
79
79
104
104
130
130
156
156
181
Water C ontent Normal, l iters
299
299
394
394
492
492
591
591
685
Water C ontent Flooded, gallons
109
109
145
145
177
177
213
213
245
Water C ontent Flooded, liters
413
413
549
549
670
670
806
806
927
Shipping W eight, approxim ate lbs.
3,100
3,100
3,700
3,700
4,100
4,100
4,700
4,700
5,400
Shipping W eight, approxim ate kg
1,157
1,157
1,381
1,381
1,530
1,530
1,754
1,754
2,015
Notes:
A. Ratings shown for elevation to 1000 Feet. For ratings above 1000 Feet, c ontact your local Cleaver-Brooks Representative.
B. Input calculated w ith N at. Gas @ 1000 Btu/ft
3,
Propane @ 2500 Btu/f t
3,
and Oil @ 140,000Btu/gal.
C . For altitudes above 1000 Feet, contact your loc al C leaver-Brooks authorized representative for verifi cation of capacity rating.
Table B2-4. Recommended Steam Nozzle Size (to maintain 4000 to 5000 fpm nozzle velocity)
Operating
Pressure
(PSIG)
BO ILER SIZE
1500
2000
2500
3000
3500
4000
4500
5000
6000
15
4
4
6
6
6
6
8
8
8
20
3
4
4
6
6
6
8
8
8
30
3
4
4
4
4
6
6
6
6
40
2-1/2
3
3
4
4
4
6
6
6
50
2-1/2
3
3
4
4
4
4
4
6
65
2-1/2
2-1/2
3
3
3
4
4
4
4
75
2-1/2
2-1/2
3
3
3
4
4
4
4
95 - 125
A
2-1/2
2-1/2
3
3
3
3
4
4
4
150
1-1/2
2
2
2-1/2
2-1/2
2-1/2
3
3
3
200
1-1/2
1-1/2
1-1/2
2
2
2-1/2
2-1/2
2-1/2
3
250 - 400
1-1/2
1-1/2
1-1/2
1-1/2
2
2
2
2
2-1/2
A. Standard nozzle size for 150 PSIG MAWP Boiler Design
Example 1: Size 3500, 150# boiler to operate @ 30 PSIG requires 4" steam nozzle in lieu of
standard 3" nozzle.
Example 2: Size 3500, 150# boiler to operate @ 200 PSIG requires 2" steam nozzle in lieu of
standard 3" nozzle.
