Boiler manual: • Installation • Start-Up • Maintenance • Parts
35Part No. 550-100-068/0308
Ratings
Boiler
model
number
I=B=R
burner
capacity
Gross
I=B=R
output
Net I=B=R ratings Boiler
H.P.
Combustion
efficiency
Thermal
efficiency
Net
firebox
volume
Flue
gas
volume
Positive
pressure
in firebox
Flue
outlet
diameter
Boiler
water
content
Packaged
boiler
weight
Light oil
GPH
Gas
MBH
MBH Steam
Sq. Ft
Steam
MBH
Water
MBH
Oil Gas Oil Gas Cubic
feet
CFM Inches
W.C.
Inches Gallons Pounds
Notes:
1, 10
2, 3 2, 4 5, 6 8 8 8 — — — — — — 7 9 — — —
488R
6.9 996 827 2,583 620 719 24.7 87.5 84.8 85.6 83.1
11.02 376 0.60 10 109 2860
488
7.0 1,010 839 2,621 629 730 25.1 87.5 84.8 85.6 83.1
11.02 370 0.60 10 109 2860
588
9.4 1,356 1,126 3,521 845 979 33.6 87.0 84.4 85.6 83.1
14.45 507 0.63 10 132 3340
688
11.8 1,701 1,413 4,469 1,072 1,229 42.2 86.7 84.1 85.6 83.1
18.08 639 0.65 10 155 3820
788
14.2 2,046 1,700 5,463 1,311 1,478 50.8 86.5 83.9 85.6 83.1
21.61 772 0.67 12 178 4345
888
16.6 2,382 1,987 6,427 1,543 1,728 59.4 86.3 83.7 85.6 83.1
25.14 906 0.69 12 201 4925
988R
17.2 2,482 2,062 6,671 1,601 1,793 61.6 86.2 83.7 85.6 83.1
28.67 1,031 0.70 14 224 5600
988
18.8 2,737 2,274 7,358 1,766 1,977 67.9 86.2 83.7 85.6 83.1
28.67 954 0.70 14 224 5600
1088R
20.0 2,887 2,399 7,763 1,863 2,086 71.7 86.2 83.6 85.6 83.1
32.20 1,184 0.71 14 247 6130
1088
21.5 3,082 2,561 8,283 1,988 2,227 76.5 86.2 83.6 85.6 83.1
32.20 1,101 0.71 14 247 6130
1188
23.5 3,428 2,848 9,213 2,211 2,477 85.1 86.1 83.5 85.7 83.1
35.76 1,299 0.72 14 270 6695
1288
26.0 3,773 3,135 10,147 2,434 2,726 93.7 86.0 83.5 85.7 83.1
39.26 1,443 0.73 14 293 7260
1388
28.5 4,119 3,422 11,071 2,657 2,976 102.2 86.0 84.4 85.7 83.1
42.79 1,588 0.74 14 316 7890
1488
31.0 4,464 3,709 12,000 2,880 3,225 110.8 86.0 83.4 85.7 83.1
46.32 1,735 0.75 16 339 8410
1588
33.0 4,809 3,996 12,925 3,102 3,475 119.4 85.9 83.3 85.7 83.1
49.85 1,854 0.76 16 362 9005
1688R
34.5 4,979 4,137 13,383 3,212 3,597 123.6 85.9 83.3 85.7 83.1
53.38 2,003 0.77 16 385 9525
1688
35.5 5,155 4,283 13,854 3,325 3,724 127.9 85.9 83.3 85.7 83.1
53.38 1,945 0.78 16
385 9525
1788
38.0 5,494 4,570 14,783 3,548 3,974 136.5 85.9 83.3 85.7 83.1
56.91 2,152 0.79 18 * 408 9780
1888
40.5 5,845 4,857 15,713 3,771 4,123 145.1 85.9 83.3 85.7 83.1
60.44 2,303 0.80 18 * 431 10775
See below to specify complete model number.1.
Burner input based on maximum of 2,000 feet altitude. For other 2.
altitudes, consult Weil-McLain distributor/agent or sales office.
No. 2 fuel oil — Commercial Standard Spec CS75-56. Heating 3.
value of oil = 140,000 Btu per gallon.
Gas pressure required at burner gas train inlet for rated burner 4.
input; based on 1,000 Btu per cubic foot natural gas, specific
gravity of 0.60. Refer to burner manual for required pressure.
Gross I=B=R ratings have been determined under the I=B=R provision 5.
governing forced draft boiler-burner units.
Based on average water temperature of 170°F in heat distributing 6.
units.
Flue gas volume at outlet temperature.7.
Net I=B=R ratings are based on net installed radiation of sufficient 8.
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.
With 0.10" W.C. positive pressure at flue collar.9.
Water boilers tested for 80 PSIG, ASME water working pressure. 10.
Steam boilers tested for 15 PSIG, ASME steam working pressure.
* Flue collar connection is oval, 16Z\," x 19M\,"
