Weil-McLain 88 manual Install intermediate sections, If using tankless heater TI sections

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Assembling the block

Sections are top heavy. Unbolted sections may fall if not supported, resulting in severe personal injury or death.

Install intermediate sections

1.Remove and discard 3/8" diameter shipping tie rods.

2.Remove grit from port machined surfaces with clean rag.

Do not use petroleum-based cleaning or sealing com- pounds in boiler system. Severe damage to system components can result, causing substantial property damage.

3.Position intermediate section so aligning lugs fit into sockets of next section. See Figure 8.

4.Install TI (tankless intermediate) and SI (supply intermediate) sections (when used) in order shown in Figure 9, page 10.

5.Draw sections together until metal-to-metal contact is made around machined port openings (see Figure 8):

a.Oil threads on 4 draw rods. Install washer and nut on end to be tightened. Use nut only on other end.

b.Uniformly draw sections together, starting at washer/nut end.

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. The draw rods must not extend past the face of the front or back section, or they will interfere with the jacket.

c.Draw rods should be torqued to a range of 90 to 100 ft-lbs. Do not back off draw rods.

d.Metal-to-metal contact will be achieved around port openings. See Figure 8. If gap occurs, it should be no greater than .032". Check with feeler gauge.

e.If, for any reason, gap around 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 gap still exists, contact your Weil-McLain distributor or sales office before continuing installation.

Part No. 550-100-068/0308

Figure 8 Sealing ring installation and port alignment

After erecting first intermediate section, check both sections for plumb. Failure to plumb sections can cause misaligned piping and breeching, possibly resulting in property damage.

6.Repeat steps 1-5.

7.Check each section for proper sealing rope position before proceeding to next section.

Failure to position sealing rope properly can cause boiler to not seal gas-tight. Gas tight seal prevents possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

8.Install remaining intermediate sections and front section using the same procedure.

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.

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