Casing Assembly Model FLE Assembly
3-14 750-192
Figure 3-24. Finishing the Wetpack Insulation
Installation
Figure 3-25. Packing the Top of the Walls
Figure 3-26. Filling the Joint with Silicone Caulking
5. Finishing the Wetpack Installation
Around the Lower Drum
• Unfold the wetpack to cover the lower drum and
tubes. Cover the entire base drum, overlapping
adjoining wetpack rolls. Continue to mold the wet-
pack around the lower drum and tube sections to
prevent the plates from coming apart while packing
the insulation (Figure 3-24).
• The wetpack should be positioned to be level with, or
just outside the base refractory at the front.
6. Finish Installing Backing Plates
• As in step 3, install the front upper and lower back-
ing plates.
7. Install Front Wall Section
To install the front wall section, repeat the same
steps used to install the rear wall. In a hot water
unit, the front wall will be one piece and the instal-
lation will be much easier, but the front wall of a
steam boiler will have two pieces just like the rear.
8. Install Roof Panel
• Tidy the top of the walls to get them ready for the
roof (pack the insulation, wipe off the wall, etc) (Fig-
ure 3-25).
• Fill any joints in the top of the front and rear walls
with silicone caulking (Figure 3-26).
• Using spray adhesive, place a strip of 1/4” paper
gasket along the width of the front and rear walls
(Figure 3-27). Using the same process, place a small
square of the material on the 4 inside corners of the
walls, allowing a little metal to show through (Figure
3-28).
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