Weil-McLain SGO SERIES 4 OIL-FIRED STEAM BOILER SGO-7 User Manual

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Part number 550-142-330/0421

SGO

OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 — Boiler Manual

SERVICE฀TECHNICIAN฀ONLY฀—฀read฀and฀follow฀completely.

AHRI฀Certied฀Rating

Boiler

Model

Number

Burner

Input

Heating

Capacity

Seasonal

Efciency

Net

Ratings

Note 5

Steam

Boiler

Water

Content

Minimum

Chimney

Dimensions

Flue

Outlet

Diameter

Draft

Loss

Thru

Boiler

OVD

Damper

Required

GPH

Note 3

MBH

Note 2

MBH

Note 2

AFUE

Steam

Sq. Ft.

Steam

MBH

Gallons

Note 8

Rect.

In.

Round

In.

Height

Ft.

Size

Inches

Note 1 & 7

Inch

W.C.

Note 9 Yes/No

SGO-3 0.95 133 114 (10)(11) 85.0 358 86 10.7 8 x 8 6 15 7 .020 Yes

SGO-4 1.20 168 144

(10)(11) 85.0 450 108 12.5 8 x 8 6 15 7 .010 Yes

SGO-5 1.45 203 174

(10)(11) 85.0 546 131 14.2 8 x 8 7 15 7 .015 Yes

SGO-6 1.75 245 210

(10)(11) 85.0 658 158 16 8 x 8 7 15 7 .015 Yes

SGO-7 2.00 280 240

(10)(11) 85.0 758 182 17.7 8 x 8 8 15 7 .015 Yes

SGO-8 2.30 322 266

(4)(6) — 833 200 19.4 8 x 12 8 20 7 .025 ---

SGO-9 2.55 357 295

(4)(6) — 921 221 21.2 8 x 12 8 20 7 .030 ---

NOTES:

SGO 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

and -0.02” W.C. draft over re .

5. Net ratings are based on net installed radiation of sufcient 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 Ofce.

6. Gross output

7. See page 18 for minimum breeching diameter.

8. To water line.

9. Listed draft losses are for factory-shipped settings.

10. Based on standard test procedures prescribed by the United States Department of Energy at combustion of 13.0% CO

and -0.02” W.C. draft over re.

11. Installation of OVD Automatic Vent Damper (P/N 381-800-515) is required.

Note: A burner nozzle change may be required - refer to the burner instructions or boiler’s rating label for correct selection.

Ratings

Figure฀33 SGO steam boiler ratings

DOE

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Weil-McLain SGO SERIES 4 OIL-FIRED STEAM BOILER SGO-7 Residential Boilers

User Manual - Page 47