Weil-McLain LGB-10, User Manual

Page: 9 / 36

Part Number 550-141-186/0100
9
• Installation • Start-Up • Maintenance • Parts
Figure 8
Base
assembly
Check for proper orifice size:
•
Natural gas – 3.95 mm
• Propane gas – 2.40 mm
Base
assembly
Figure 7
Access
shield
(sizes D, E, F
and G
shown)
Orifices
Assembly order
Burner seating
2a
Before assembling base, relocate access shield from lower shipping holes to upper mounting holes. See
Figure 7
.
• Base sizes 4, 5, A, B and C — one mounting hole.
• Base sizes D, E, F and G — two mounting holes.
Boiler assembly
— base
Proper orifices must be used. Failure to do so will cause severe personal injury, death or
substantial property damage.
Assemble base(s) as shown in
Figure 8
, in the order shown in the table below. Dual base shown.
Level and straighten burners to avoid misfiring.
Base assembly must be located in order shown in
Base Arrangement Table
, below, so flue
collector/draft hoods, jackets, and gas controls are installed in correct position.
Burners must be properly seated in their locating slots with openings facing up. Front of
burners must rest fully over main burner orifices. Gas orifices must inject down center of
burners. Failure to properly level and seat burners will result in severe personal injury, death
or substantial property damage.
Base Arrangement Table (Note 1)
Boiler
Model
Number Base Size Boiler
Model
Number Base Size
LGB-4 4 -- LGB-14 C B
LGB-5 5 -- LGB-15 C C
LGB-6 A -- LGB-16 D C
LGB-7 B -- LGB-17 D D
LGB-8 C -- LGB-18 E D
LGB-9 D -- LGB-19 E E
LGB-10 E -- LGB-20 F E
LGB-11 F -- LGB-21 F F
LGB-12 G -- LGB-22 G F
LGB-13 B B LGB-23 G G
Note 1: From boiler left side (front view). Side panels
shipped in separate carton.
186-07
Base front panel
Mounting hole
M
ounting hole
Shipping hole
Base access shield
Screw
186-08
For dual
base only
Trim insulation flush with flanges
where two bases connect.