Gas-Fired Direct Vent Cast Iron Boilers – Field Assembly Instructions
10
Step 18
Remove the runner beams and bolt block to base
The block assembly is
extremely heavy.
Use care
as the beams are removed to
ensure the block does not slide
during the process.
1. When the section assembly is
completed,
leave the draw rods
in place
so section joints are secure
while the block is manipulated.
2. Remove the two bolts and hardware
from the bottom of the front section.
Remove the mounting
Remove the mounting
bolts from the bottom
bolts from the bottom
of the front section.
of the front section.
3. Use pry bars at each leg (front and back)
on one side of the base. Tilt the block
only enough to allow sliding the runner
beam.
4. Pull the runner beam out.
5. Ease the block down so it rests on the
front and rear legs.
6. Repeat the process with pry bars on the
other side of the block and remove the
remaining runner beam.
7. Check alignment of the section leg slots
with the hole in the legs — pry section
into position as needed.
8. Install the 3/8 x 4-1/2 inch bolts, nuts,
washers and wedges on all four legs (as
in Step 5).
Step 19
Insert the tie rods, then tighten tie rod nuts using a torque wrench
The tie rods ARE NOT
used to pull the sections
together — ONLY to keep
them fi rmly in position.
1. After the block has been bolted to the
four legs, remove the draw rods, nuts
washers and bearing plates.
2. When the section assembly is complet-
ed, slide a 1/2 inch tie rod through each
of the four tie rod holes.
3. Apply a washer and nut on each end
and pull up fi nger tight.
DO NOT exceed 30 foot-
pounds
when tightening nuts.
Higher torque could cause
breakage of the cast iron.
1. Use a torque wrench to tighten the nuts
on the draw rods.
2. Start with the upper left corner rod fi rst.
3. Tighten the nut to 15 foot-pounds.
4. Move to the lower right rod. Tighten the
nut to 15 foot-pounds.
5. Repeat with the lower left, then the
upper right rod, both tightened to
15 foot-pounds.
6. Repeat this sequence again, but fi nish
the tightening to 30 foot-pounds for
each nut.
