Ratings - Weil-McLain WGO 4 Series Manual

WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —

Ratings

Table 8
WGO Series 4 oil-fired water boiler ratings
Burner Input
Boiler
Model
GPH MBH
(9)
(3)
(3)
WGO-2
0.70 98
WGO-2RD 0.70 98
WGO-3R
0.80 112
WGO-3RD
0.80 112
WGO-3D 0.95 133
WGO-4R
1.00 140
WGO-4RD 1.00 140
WGO-4D
1.20 168
WGO-5R
1.20 168
WGO-5RD 1.20 168
WGO-5D
1.45 203
WGO-6R 1.40 196
WGO-6RD
1.40 196
WGO-6D
1.75 245
WGO-7R 1.60 224
WGO-7RD
1.60 224
WGO-7D
2.00 280
WGO-8 2.30 322 266 (6)
WGO-9
2.55 357 295 (6)
(1) WGO 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% CO
and -0.02" W.C. draft overfire.
(5) Net AHRI 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. Water ratings are based on a piping and pick-up allowance of 1.15. An additional
allowance should be made for unusual piping and pick-up loads.
(6) AHRI gross output.
(7) See page 16 for minimum breeching diameter.
(8) Listed draft losses are for factory-shipped settings.
(9) Boiler model suffixes: "R" designates a reduced input version. No separate/additional damper kit required. "D" designates that the
separate High Input OVD Automatic Vent Damper P/N 381-800-515 is required. "RD" designates a reduced input version and and
the separate ES Vent damper is required (P/N 381-800-501 through 381-800-506).
(10) Based on standard test procedures prescribed by the United States Department of Energy at combustion of 13.0% CO
W.C. draft overfire.
NOTE: A burner nozzle change may be required - refer to the burner instructions or boiler's rating label for correct selection.
Part number 550-142-331/0421
SERVICE TECHNICIAN ONLY — read and follow completely.
AHRI Certified Ratings
Net
Heating Seasonal
Rating
Capacity Efficiency
(water)
MBH AFUE MBH
(2) (2) (5)
%
86 86.4 75
(4)
86 87.0 75
(4)
98 86.2 85
(4)
98 (4) 87.0 85
115 86.0 100
(4)
122 86.2 106
(4)
123 87.0 107
(4)
146 86.0 127
(4)
147 (4) 86.1 128
148 (4) 87 129
176 (10) 86.0 153
171 86.1 149
(4)
173 87.0 150
(4)
213 (10) 86.0 185
196 86.0 170
(4)
197 87.0 171
(4)
244 (10) 86.0 212
- 231
(4)
(4) - 257
Boiler Manual
DOE
Draft
Boiler Flue
Loss
Water Outlet
Thru
Content Diameter
boiler
Gallons Inches
In W C
(7)
(8)
.010
11.0 7
.010
.020
.010 14.9 7
.020
.010
.010 13.4 7
.010
.015
.015 15.9 7
.015
.015
.015 18.4 7
.015
.015
.015 20.8 7
.015
0.025 23.3
7
0.030 25.8
®
OVD
Minimum
Damper
Chimney
Required
Rect Round Height
Inches Inches Feet Yes/No
8 x 8 6 15
8 x 8 6 15
8 x 8 6 15
8 x 8 7 15
8 x 8 7 15
8 x 8 8 15
8 x 12 8 20
and -0.02"
2
No
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
No
2
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