Install Burner And Chimney - All Boilers; Install Burner (Also Refer To Instructions Packed With Burner); General Chimney Requirements; Connect Breeching - Weil-McLain SGO 4 Series Manual

SGO
OIL-FIRED NATURAL DRAFT STEAM BOILER — SERIES 4 —
Install burners and chimney — all boilers
Install burner
(also refer to instructions packed with burner)
Use only burners specified for use on Weil-
McLain oil boilers. Contact individual burner
manufacturers for proper burner selections.
For burners with OEM welded flanges:
1. Secure mounting flange and gasket to burner mounting
door. Use three (3) bolts provided.
2. Open door to verify secure placement of insulation on
target wall, chamber floor and burner mounting door.
3. Securely close door and tighten nut.
For burners without OEM welded flanges:
1. Secure universal mounting flange and gasket to burner
mounting door. Use three (3) bolts provided.
2. Secure burner on flange with three (3) bolts.
3. Position burner so end of air tube is level to 1½-degree tilt
down toward chamber. Open door to verify burner position.
End of air tube should be flush to ¼" recessed from inside
wall of burner door refractory. Check for secure placement
of insulation on target wall, chamber floor and burner
mounting door.
4. Securely close door and tighten nut.

General chimney requirements

Designed for natural draft firing. Connect boiler to vertical
chimney.
Insufficient draft can cause flue gas leakage and
carbon monoxide emissions, which will lead to
severe personal injury or death.
Use vent material approved by local codes for oil-fired burners.
In their absence, refer to:
• NFPA 31- latest edition, Installation of Oil-Burning
Equipment.
• NFPA 211- latest edition, Standard for Chimneys, Fire-
places, Vents and Solid Fuel Burning Appliances.
• In Canada, refer to CSA B139, Installation Code for Oil-
Burning Equipment.
NFPA 211 requires chimney to be lined before connected to
boiler.
Table 4 Minimum chimney sizes
Minimum
Boiler
breeching
model
diameter
number
(Note 3)
SGO-3
5"
SGO-4 6"
SGO-5
6"
SGO-6
7"
SGO-7
SGO-8
7"
SGO-9
NOTES:
1. 6¾" x 6¾" inside liner.
2. 6½" x 10½" inside liner.
3. Flue collar on boiler is 7" diameter.
18
SERVICE TECHNICIAN ONLY — read and follow completely.
Minimum
chimney size Minimum
chimney
Rect. Round height
8" x 8"
6" 15'
(Note 1)
8" x 8"
7" 15'
(Note 1)
8" x 12"
7" 20'
(Note 2)
Boiler Manual
Inspect existing chimney before installing new boiler.
Failure to do any of the following will result in severe
personal injury or death.
• Clean chimney, including removal of blockage.
• Repair or replace damaged pipe or liner.
• Repair mortar and joints.
To prevent downdrafts, extend chimney at least 3 feet above highest
point where it passes through roof and 2 feet higher than any portion
of building within 10 feet. Increase chimney cross-sectional area and
height at least 4% per 1,000 feet above sea level.
• Minimum clearances from vent pipe to combustible material:
• 6 inches — Type "L" double-wall vent
• 9 inches — Single-wall vent
• Minimum chimney sizes should be used.
Oversized chimneys, outside masonry chimneys and/or
derated inputs can result in condensation in chimney.

Connect breeching

Connect breeching
Long horizontal breechings, excessive number of tees
and elbows, or other obstructions restricting combus-
tion gas flow can result in possibility of condensation,
flue gas leakage and carbon monoxide emissions,
which can lead to severe personal injury or death.
1. Install two (2) flue pipe brackets.
2. Connect full-sized breeching when possible. See Minimum
Chimney Size Table 4.
• Back outlet — see Figures 10 and 11, page 19.
• Top outlet — see Figures 13 and 12, page 19.
3. Connection must be made above bottom of chimney to avoid
blockage. Breeching must not enter chimney far enough to cause
obstruction. Use thimble or slip joint where breeching enters
chimney to allow removal for cleaning.
4. When burner and boiler are properly installed, draft over fire
will be approximately -0.01" to -0.02" W.C. Install barometric
control in breeching, per control manufacturer's instructions,
when excess draft needs to be relieved or to comply with ap-
plicable codes and regulations. Use draft gauge to adjust proper
opening.
5. An induced draft fan for the chimney may be necessary if:
• Excessive resistance to flow of combustion gases can be
expected.
• Cross-sectional area of chimney is smaller than minimum
recommended.
• Chimney height is less than recommended.
Seal all vent joints. Interlock burner with fan opera-
tion.
6. Boiler models SGO-3 through SGO-7 require the installation of
the Field Controls OVD-7 damper, Weil-McLain part number
381-800-515, which is provided with Packaged boilers, sold
separately for Semi-packaged and Knocked-down boilers.
Refer to Figures 10 and 13, page 19.
Part number 550-142-330/0421