SERVICE TECHNICIAN ONLY — read and follow completely.
DOE
®
Ratings
Table 8
WGO
Series 4
oil-fired water boiler ratings
AHRI Certified Ratings
Boiler
Model
(9)
Burner Input
Heating
Capacity
Seasonal
Efficiency
Net
Rating
(water)
Draft
Loss
Thru
boiler
Boiler
Water
Content
Flue
Outlet
Diameter
Minimum
Chimney
OVD
Damper
Required
GPH
(3)
MBH
(3)
MBH
(2)
AFUE
%
MBH
(2) (5)
In W C
(8)
Gallons Inches
(7)
Rect
Inches
Round
Inches
Height
Feet
Yes/No
WGO-2
0.70
98
86
(4)
86.4
75
.010
11.0
7
8 x 8
6
15
No
WGO-2RD
0.70
98
86
(4)
87.0
75
.010
Yes
WGO-3R
0.80
112
98
(4)
86.2
85
.020
14.9
7
8 x 8
6
15
No
WGO-3RD
0.80
112
98
(4)
87.0
85
.010
Yes
WGO-3D
0.95
133
115
(4)
86.0
100
.020
Yes
WGO-4R
1.00
140
122
(4)
86.2
106
.010
13.4
7
8 x 8
6
15
No
WGO-4RD
1.00
140
123
(4)
87.0
107
.010
Yes
WGO-4D
1.20
168
146
(4)
86.0
127
.010
Yes
WGO-5R
1.20
168
147
(4)
86.1
128
.015
15.9
7
8 x 8
7
15
No
WGO-5RD
1.20
168
148 (4)
87
129
.015
Yes
WGO-5D
1.45
203 176 (10)
86.0
153
.015
Yes
WGO-6R
1.40
196
171
(4)
86.1
149
.015
18.4
7
8 x 8
7
15
No
WGO-6RD
1.40
196
173
(4)
87.0
150
.015
Yes
WGO-6D
1.75
245 213 (10)
86.0
185
.015
Yes
WGO-7R
1.60
224
196
(4)
86.0
170
.015
20.8
7
8 x 8
8
15
No
WGO-7RD
1.60
224
197
(4)
87.0
171
.015
Yes
WGO-7D
2.00
280 244 (10)
86.0
212
.015
Yes
WGO-8
2.30
322 266 (6)
(4)
-
231
0.025
23.3
7
8 x 12
8
20
No
WGO-9
2.55
357 295 (6)
(4)
-
257
0.030
25.8
No
(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
2
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
2
and -0.02”
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
39
WGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 4 —
Boiler Manual
