Boiler
Model
Number
I=B=R
Burner
Capacity
GPH
(3)
DOE
Heating
Capacity
(4)
MBH
(2)
Net I=B=R
Ratings
(5)
DOE
Seasonal
Efficiency
%
AFUE
Minimum
I=B=R Chimney
Round
Flue
Outlet
Size In
(7)
Steam
Boiler
Water
Content
Gal
(8)
Draft
Loss
Thru
Boiler
In
W.C.
(9)
Steam
sq. ft.
Steam
MBH
Rect
In
Round
In
Height
Ft
*-SGO-3
0.95
114
354
85
83.8
8x8
6
15
7
10.7
.020
*-SGO-4
1.20
144
450
108
84.0
8x8
6
15
7
12.5
.010
*-SGO-5
1.45
174
546
131
83.9
8x8
7
15
7
14.2
.015
*-SGO-6
1.75
210
658
158
83.7
8x8
7
15
7
16
.015
**-SGO-7
2.00
240
750
180
83.6
8x8
8
15
7
17.7
.015
**-SGO-8
2.30
266
(6)
833
200
—
8x12
8
20
7
19.4
.025
**-SGO-9
2.55
295
(6)
921
221
—
8x12
8
20
7
21.2
.030
*
Substitute “P” for completely assembled packaged steam boiler without burner (SGO-3 through SGO-6 only).
Substitute “A” for boiler only for use with approved burners as listed with I-B=R.
** Available only as an “A” unit.
(1)
SGO boiler designed with convertible vertical and horizontal flue outlet.
(2)
MBH refers to thousands of Btu per hour.
(3)
Based on 140,000 Btu/gal.
(4)
Based on standard test procedures prescribed by the United States Department of Energy at combustion condition of 13.5% CO2
and -0.02” W.C. draft overfire .
(5)
Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and nothing
need be added for normal piping and pick-up. Steam ratings are based on a piping and pick-up allowance of 1.33. An additional
allowance should be made for unusual piping and pick-up loads. Consult local Weil-McLain Sales Office.
(6)
I=B=R gross output
(7)
See page 12 for minimum breeching diameter.
(8)
To water line.
(9)
Listed draft losses are for factory-shipped settings.
Ratings
Table 12
SGO GOLD Oil steam boiler ratings
Part number 550-141-829/1211
46
GOLD
SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 3 —
Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
®
