Weil-McLain 4 Series Manual page 14

insTallaTion
Boiler Assembly, continued
1
Assembling the Block, continued
Install the intermediate sections:
1 Remove and discard 3/8" diameter shipping tie
rods
2
2 Remove grit from port machined surfaces with
clean rag
3 Remove grit from tapped holes in all sections
4 Position the intermediate section so aligning lugs
fit into sockets of next section. See Figure 6.
3
IMPORTANT
Install tankless intermediate (TI) and supply
intermediate sections (when used) in the order shown
in Table 5, page 15.
5 Draw the sections together until metal-to-metal
4
contact is made around machined port openings
as shown in Figure 6
a Oil the threads on four draw rods Install a
washer and nut on the end to be tightened
Use only a nut on the other end
b Uniformly draw the sections together, starting
at the end with the washer and nut
5
IMPORTANT
Leave an equal amount of thread on each end of
the draw rod; this is needed to allow securing the
jacket support brackets in place. To avoid jacket
interference, the draw rods must not extend past the
6
face of the front or back sections.
c Draw rods should be torqued to a range of 100
to 120 ft-lbs Do not back off draw rods.
d Metal-to-metal contact will be achieved around
port openings See Figure 6 If gap occurs, it
should be no greater than 032" Check with a
7
feeler gauge
e If the gap around the machined port opening
exceeds 032", check for rope extending
from rope grooves, dirt on port openings or
sockets, or misaligned lugs If corrections are
made and a gap still exists, contact your WM
8
Technologies distributor before continuing
installation
14
sTeam series
94
Figure 6
Sealing ring installation and port alignment
Section
NOTICE
After erecting the first intermediate section, check
both sections for plumb. Failure to plumb sections
can cause misaligned piping and breeching, which
can result in property damage.
WARNING
!
A gas-tight seal prevents possible flue gas
leakage and carbon monoxide emission. Failure
to position sealing rope properly can prevent
a gas-tight seal, which can result in severe
personal injury or death.
6 Check each section for proper sealing rope
position before proceeding to the next section
7 Install remaining intermediate sections and front
section using the same procedure in this section
If using tankless heater (TI) sections:
• Install tankless heaters and gaskets or heater
cover plates and gaskets Use 3/8" x 3/4" studs,
washers, and nuts
boiler manual
4
Section
Metal-
to-metal
contact
Silicone
sealant
Elastomer
sealing ring
230040
550-100-157/0523