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Inspection and Maintenance
from the top and bottom of the panel while tapping the
insulation into the panel.
Place a gasket on the side of the panel. It should go the full
height of the panel from the top to the bottom. Ensure that the
gasket protrudes out the inside wall slightly (approximately
1/16") at the top and the bottom of the panel. It should be just
above the holes in the middle of the panel.
NOTE: DO NOT touch the insulation when you are moving
the panels. This can cause the insulation to move and undo
previous work. Try not to let the insulation touch the boiler
until it is in its resting position.
The inner casing panels are to be oriented with the lift eyes at
the top.
Panels should be installed starting in the middle. Place the 1st
(middle) panel on the base. Install a washer and place the nuts
(several turns) on the 2nd and 4th stud. Repeat this at the top
of the panel.
Using the silicone, seal the seam of the gaskets at the top and
bottom of the center panel.
Install the next two panels by positioning them so that the
bottom of the panel is at the same level as the middle panel.
Angling it into position first rather than setting the panel on
the studs and sliding it into position may be easier. Install the
two nuts on the top and bottom, and place the remaining nuts.
Repeat as necessary until panels are installed.
Place bolts in the two vertical seams between the panels.
Starting at the top of the rear panel and working down, tighten
the bolts. Repeat this on the front panel. After finishing this,
return to the rear panel and tighten to the bottom; repeat this
on the front panel.
750-364
Figure 7-1 Gasket application to inner casing
Install the nuts and washers around the outside of the wall and
evenly pull the panels to the boiler. Start in the middle of the
bottom bolts, tighten them working out and stop at the last 4
bolts. Repeat this at the top, front and rear. When you are
tightening the remaining bolts, work out to the corners,
starting at the inside 8 bolts, then with the next 8 and so on,
until you tighten the corners. The bolts should be tightened to
a torque of 228 in-lb.
Repeat these steps on the other side of the boiler.The outer
casing panels can now be installed starting with the end
panels. Slide each end panel under the upper frame and push
the bottom section into the boiler and allowing it to slide
down to catch the bottom clamp angle. Then slide the end
panels under the corner frames and install any remaining
center panels.
The fireside should be thoroughly cleaned prior to any
extended layup of the boiler. Depending upon circumstances,
a protective coating may be required. See Chapter 3, Section
H "Preparation for Extended Layup".
E. CONTROLS
Relief Valves
The relief valve is a very important safety device and
deserves attention accordingly. Proper removal, installation
or handling of a relief valve is of primary importance.
Exercise care when removing, installing or handling a relief
valve to ensure proper operation, long service life, and to
ensure that the valve functions as designed.
Chapter 7
7-3
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