Weil-McLain 80 Install flue collector, Flue collector assembly, Install collector hold-down bolts

Weil-McLain 80 Boiler For Gas, Light Oil, Gas/Light Oil Fired Burners

6 Install flue collector

Flue collector assembly

1.Figure 10, page 11, shows flue collector components and locations. Figure 11, page 13, shows collector hoods for all models. Follow all instructions in this manual to ensure correct installation of the flue collector.

2.Model 80 boilers are available with either rear flue or top flue. Verify that you have the correct components for your application. You can convert a Model 80 from rear to top or top to rear flue using a flue conversion kit, available from your Weil-McLain distributor.

The flue outlet for top flue models must be located as shown in this manual.

Install collector hold-down bolts

1.Figure 10, lower left — Install a collector hold-down bolt assembly at each section joint, and on both sides of the boiler section assembly. Set aside the flanged nuts for securing the collector assembly when it is ready.

2.Each hold-down bolt assembly consists of a 5/16" x 2" carriage bolt, flat washer, regular hex nut and a flanged nut as shown.

Prepare flue collector hood assembly

Make sure gaskets are intact, not torn or otherwise damaged. These conditions can cause possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per instructions on page 38 of this manual. Failure to comply could result in severe personal injury.

1.Stand flue collector hood front module (item 4) on end as in Figure 8, left side.

Figure 8 Collector hood preparation

2.Wipe all flanged surfaces with clean rag.

3.Lay flue collector hood gasket (item 2) on flange.

4.Place flue collector end cap (item 1) on gasket. Align bolt holes. Secure with seven 5/16" x 5/8" flanged bolts and flanged nuts. Tighten to between 30 and 35 inch-pounds torque. (See WARNING on page 12, top right column.)

5.For 880 - 1280:

a.Stand remaining hood module on end, as in Figure 8, right side.

b.Wipe all flanged surfaces with clean rag.

c.Lay gasket on flange.

d.Carefully place open end of first module on top of gasket, aligning flanged surfaces.

e.Secure with seven 5/16" x 5/8" flanged bolts and flanged nuts. Tighten to between 30 and 35 inch- pounds torque. (See WARNING on page 12.)

6.Attach flat-stitched sealing rope to hood assembly. See Figure 9:

a.Lay hood on floor with flanged side up.

b.Wipe flanged surface with clean rag to remove dirt and oil.

c.Apply double-faced tape to flanged surface.

d.Apply rope to tape beginning on one side of open end of hood, leaving ¼" extending past edge. Bend rope around corners. DO NOT cut or stretch rope.

Do not pre-cut rope. All collector hood joints must be sealed gas-tight to prevent possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

e.Continue around entire flange. At other open end, leave ¼" rope extending past edge of flange. Cut off excess rope.

Double-faced tape serves only to hold sealing rope in place during installation. It will disintegrate over time. If collector hood and sealing rope are removed for any reason, install new tape and new gasket.

Figure 9 Flue collector sealing rope installation

10 Part No. 550-141-935/0602