CleaverBrooks FLE - Chapter 3; Install Wetpack Around Vent Tube; Install Backing Plates

Casing Assembly Model FLE Assembly
3-8 750-192
Figure 3-4. Location of Vent Tube
Figure 3-5. Wetpack on vent tube
Figure 3-6. Positioning the 9" x 9" section over the
ferrules
Figure 3-7. Cut a 4 inch slit in the wetpack to cover
the lower drum. Mold the wetpack around the base
of the vent tube. Be sure the vent tube, ferrule and
lower drum are covered.
1. Install Wetpack around Vent Tube
• Position a length of wetpack over the internal portion
of the tube to determine its length. Cut it to fit the
tube then cut a 4” slit at the bottom. Tightly wrap the
tube with the wetpack and tape (with masking or
duct tape) it in place, leaving the slit at the bottom.
Push the wetpack between the adjacent tubes
through the external bend of the vent tube. The joint
should face rear (Figure 3-5).
• Use the remaining piece of insulation (approximately
9” x 9”) and wrap it around the base of the vent
tube, ferrule area and retainer stud Figure 3-6).
• Unfold the wetpack to cover the lower drum and
tubes near the vent tube. Cut a 4 inch slit in the wet-
pack, wrap it around the base of the vent tube and
then unroll it over the lower drum and tubes (Figure
3-7).
2. Install Backing Plates
Remove Support Bracket (Hot Water Units Only)
• Remove the drum spreader
• Torch the support bracket to remove it from the upper
drum. Leave at least ½” of the bracket; if the drum is
cut into, it must go through a long process to ensure
that it can be re-CSA certified, so the easiest way to
prevent this is to leave space between the plate that
is being cut and the drum. DO NOT cut into the
drum.
Upper Backing Plate
• Using wire ties, connect the two pieces of backing
plate together at one point. Place the pieces over the
upper drum (with the tie at the top) and tie the bot-
tom of the two pieces together. Because these plates
stop the insulation from being pushed into the tube
area during packing, the backing plates must be
pushed against the tubes. Make sure that the back-
ing plate seams are in a vertical position around the
upper drum (Figure 3-8).