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Boiler manual:
• Installation
Ratings
Boiler
I=B=R
Gross
model
burner
I=B=R
number
capacity
output
Light oil
Gas
MBH
GPH
MBH
Notes:
2, 3
2, 4
5, 6
1, 10
488R
6.9
996
827
488
7.0
1,010
839
588
9.4
1,356
1,126
688
11.8
1,701
1,413
788
14.2
2,046
1,700
888
16.6
2,382
1,987
988R
17.2
2,482
2,062
988
18.8
2,737
2,274
1088R
20.0
2,887
2,399
1088
21.5
3,082
2,561
1188
23.5
3,428
2,848
1288
26.0
3,773
3,135
1388
28.5
4,119
3,422
1488
31.0
4,464
3,709
1588
33.0
4,809
3,996
1688R
34.5
4,979
4,137
1688
35.5
5,155
4,283
1788
38.0
5,494
4,570
1888
40.5
5,845
4,857
1.
See below to specify complete model number.
2.
Burner input based on maximum of 2,000 feet altitude. For other
altitudes, consult Weil-McLain distributor/agent or sales office.
3.
No. 2 fuel oil — Commercial Standard Spec CS75-56. Heating
value of oil = 140,000 Btu per gallon.
4.
Gas pressure required at burner gas train inlet for rated burner
input; based on 1,000 Btu per cubic foot natural gas, specific
gravity of 0.60. Refer to burner manual for required pressure.
Part No. 550-100-068/1009
• Start-Up
• Maintenance
Net I=B=R ratings
Boiler
Combustion
H.P.
Steam
Steam
Water
Sq. Ft
MBH
MBH
8
8
8
—
2,583
620
719
24.7
87.5
2,621
629
730
25.1
87.5
3,521
845
979
33.6
87.0
4,469
1,072
1,229
42.2
86.7
5,463
1,311
1,478
50.8
86.5
6,427
1,543
1,728
59.4
86.3
6,671
1,601
1,793
61.6
86.2
7,358
1,766
1,977
67.9
86.2
7,763
1,863
2,086
71.7
86.2
8,283
1,988
2,227
76.5
86.2
9,213
2,211
2,477
85.1
86.1
10,147
2,434
2,726
93.7
86.0
11,071
2,657
2,976
102.2
86.0
12,000
2,880
3,225
110.8
86.0
12,925
3,102
3,475
119.4
85.9
13,383
3,212
3,597
123.6
85.9
13,854
3,325
3,724
127.9
85.9
14,783
3,548
3,974
136.5
85.9
15,713
3,771
4,123
145.1
85.9
• Parts
Thermal
Net
efficiency
efficiency
firebox
volume
Oil
Gas
Oil
Gas
Cubic
feet
—
—
—
—
—
84.8
85.6
83.1
11.02
84.8
85.6
83.1
11.02
84.4
85.6
83.1
14.45
84.1
85.6
83.1
18.08
83.9
85.6
83.1
21.61
83.7
85.6
83.1
25.14
83.7
85.6
83.1
28.67
83.7
85.6
83.1
28.67
83.6
85.6
83.1
32.20
83.6
85.6
83.1
32.20
83.5
85.7
83.1
35.76
83.5
85.7
83.1
39.26
84.4
85.7
83.1
42.79
83.4
85.7
83.1
46.32
83.3
85.7
83.1
49.85
83.3
85.7
83.1
53.38
83.3
85.7
83.1
53.38
83.3
85.7
83.1
56.91
83.3
85.7
83.1
60.44
5.
Gross I=B=R ratings have been determined under the I=B=R provision
governing forced draft boiler-burner units.
6.
Flue gas volume at outlet temperature.
7.
Net I=B=R ratings are based on net installed radiation of sufficient
quantity for the requirements of the building.
Nothing need be added for normal piping and pick-up.
Water ratings are based on a piping and pick-up allowance of 1.15.
Steam ratings are based on the following allowances: 488 – 588 =
1.333; 688 = 1.323; 788 = 1.301; 888 = 1.289; 988 – 1888 = 1.288.
An additional allowance should be made for gravity hot water systems
or for unusual piping and pick-up loads.
Consult local Weil-McLain distributor/agent or sales office.
8.
With 0.10" W.C. positive pressure at flue collar.
9.
Water boilers tested for 80 PSIG, ASME water working pressure.
Steam boilers tested for 15 PSIG, ASME steam working pressure.
*
Flue collar connection is oval, 16Z\," x 19M\,"
Flue
Positive
Flue
Boiler
gas
pressure
outlet
water
volume
in firebox
diameter
content
CFM
Inches
Inches Gallons Pounds
W.C.
7
9
—
—
376
0.60
10
109
370
0.60
10
109
507
0.63
10
132
639
0.65
10
155
772
0.67
12
178
906
0.69
12
201
1,031
0.70
14
224
954
0.70
14
224
1,184
0.71
14
247
1,101
0.71
14
247
1,299
0.72
14
270
1,443
0.73
14
293
1,588
0.74
14
316
1,735
0.75
16
339
1,854
0.76
16
362
2,003
0.77
16
385
1,945
0.78
16
385
2,152
0.79
18 *
408
2,303
0.80
18 *
431
Packaged
boiler
weight
—
2860
2860
3340
3820
4345
4925
5600
5600
6130
6130
6695
7260
7890
8410
9005
9525
9525
9780
10775
35
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