WTGO Boiler Manual
Part number 550-141-825/1211
42
GOLD
WTGO
OIL-FIRED NATURAL DRAFT WATER BOILER — SERIES 3 — Boiler Manual
SERVICE TECHNICIAN ONLY — read and follow completely.
Boiler Model
Number
(9) (10)
I=B=R
Burner
Capacity
GPH (3)
DOE
Heating
Capacity
MBH
(4) (2)
Net
I=B=R
Ratings
(5)
MBH (2)
DOE
Seasonal
Efciency %
Afue
Minimum I=B=R
Chimney
Round
Flue
Outlet
Size In
(7)
Boiler
Water
Content Gal
Draft Loss
Thru Boiler
In W.C. (8)
Rect
In
Round
In
Height
Ft
*WTGO-3LR 0.70 86 75 86.4
8 x 8 6 15 7 11.0
0.010
*WTGO-3L 0.95 114 99 85.3 0.010
*WTGO-3R 0.80 98 85 86.2
8 x 8 6 15 7 14.9
0.020
*WTGO-3 0.95 115 100 85.3 0.020
*WTGO-4R 1.00 122 106 86.2
8 x 8 6 15 7 13.4
0.010
*WTGO-4 1.20 145 126 85.0 0.010
*WTGO-5R 1.20 147 128 86.1
8 x 8 7 15 7 15.9
0.015
*WTGO-5 1.45 175 152 85.0 0.015
*WTGO-6R 1.40 171 149 86.1
8 x 8 7 15 7 18.4
0.015
*WTGO-6 1.75 212 184 85.0 0.015
*WTGO-7R 1.60 196 170 86.0
8 x 8 8 15 7 20.8
0.015
*WTGO-7 2.00 242 210 85.0 0.015
**WTGO-8 2.30 266 (6) 231 -
8 x 12 8 20 7
23.3 0.025
**WTGO-9 2.55 295 (6) 257 - 25.8 0.030
* Substitute “P” for completely assembled packaged boiler without burner (WTGO-3 through WTGO-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) WTGO boiler designed with convertible vertical and horizontal ue 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. dra overre.
(5) Net I=B=R ratings are based on net installed radiation of sucient 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. Consult local Weil-McLain Sales Oce.
(6) I=B=R gross output
(7) See page 12 for minimum breeching diameter.
(8) Listed dra losses are for factory-shipped settings.
(9) Boiler model suxes: "R" designates a reduced input version. NOTE: A burner nozzle change is required — refer to the burner
instructions or boiler's rating label for correct selection.
(10) "L" designates a boiler with special front section (1½” supply tapping).
Ratings
Table 11 GOLD WTGO oil water boiler ratings
®