Weil-McLain 88 manual Assembling the block, Prepare and position back section

Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Assembling the block

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

Prepare and position back section

1.Apply 1/8" continuous bead of sealing rope adhesive in sealing rope grooves. See Figure 6. Do not get any adhesive on machined port surfaces.

2.Place ½" sealing rope in groove. Around curves, grasp at 1" intervals and push together. Do not stretch.

Do not pre-cut rope. Gas tight seal must be maintained to prevent possibility of flue gas leakage and carbon monoxide emissions, causing severe personal injury or death. Cut rope as each section is completed.

3. Remove any 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.

4.Place 9" and 6" sealing rings in appropriate port openings. See Figure 6. If sealing ring slips out of groove, stretch ring gently for several seconds, then reposition in groove.

5.Apply continuous bead of silicone sealant no larger than 1/16" around entire outside edge of outer machined surface of port. Refer to Figure 7. Do not apply silicone sealant on, next to or under sealing ring.

Silicone sealant applied as specified above prevents un- burned oil vapors from coming in contact with sealing ring. Vapor contact can damage rings, resulting in severe damage to boiler and substantial property damage.

6.Hoist back section upright. Then temporarily screw a 6-inch threaded pipe at least 36 inches long into the lower (return) tap- ping.

7.Hoist the section and put into position.

8.Place a block under the 6-inch pipe to hold the back section up- right and plumb.

The back section must be plumb before installing other sections to ensure the block will assemble correctly.

9.The 6-inch support pipe and block can be removed after several sections have been installed, and the assembly is stable.

10.Install intermediate sections as described on the following page.

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Figure 6 Sealing rope installation

Figure 7 Silicone sealant

Part No. 550-100-068/0308