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Combustible Walls
Combustible Walls Accessories
| Part # | WT | NS | OD | Order |
|---|---|---|---|---|
| 80T-020-L26 | 52 | 2 | 14 |
Thimbles provide protective transitions for exhaust piping where it is necessary
to pass through walls and/or roofs safely to the outside atmosphere. Thimbles are
critical in complying with local fire and safety regulations by protecting wall and/or
roof material from exhaust tube heat. You should obtain the most up-to-date copies
of documents from the National Electrical Code and other
applicable authorities.
1. Cut a hole in the desired installation surface _Ó larger than the thimble diameter or as the installing contractor recommends.
2. Apply a bead of sealant around the perimeter of the exterior flashing that will be in contact with the surface and is a minimum of one inch from the edge of the flashing.
3. Install the thimble through the hole so that the exterior flashing is flush against the outside surface, clocking as needed.
4. Apply a bead of sealant around the perimeter of the interior flashing that will be in contact with the surface and is a minimum of one inch from the edge of the flashing.
5. Install the interior flashing and clock as needed.
6. Install corrosion resistant fasteners into both the exterior and interior flashing surfaces, installing the fasteners with the recommended sealant in order to secure the thimble.
7. With thimble installed and fastened to surface, insert exhaust piping through the ID hole of the thimble. Ensure that enough exhaust piping is installed to be able to allow installation of the rain cap and clamp. Ensure that the exhaust piping is not in contact with the inner wall of the thimble.
8. Install a _Ó bead of sealant at the gap around the perimeter of the thimble body and the exterior flashing to cover any gaps and prevent leakage.
9. From the exterior of the building, install the rain guard over the exhaust pipe with the included clamp.
10. Tighten the clamp to secure the rain guard to the thimble. 11. Ensure that the ventilation holes/slots are not blocked and are free of obstructions.
¥ Review that all components of your exhaust system are properly installed and ready for operation.
¥ If there is any indication of leaks or damage, cease operation immediately and conduct a broader inspection to determine the cause and resolve.
¥ After the initial engine run and cool down, re-check all bolts for tightness and torque as required.
¥ Exhaust back-pressure must not exceed the allowable back-pressure specified by the engine manufacturer. Excessive exhaust back-pressure reduces engine power and engine life and may lead to high exhaust temperatures and smoke. Engine exhaust back-pressure should be estimated before the layout of the exhaust system is finalized and is recommended to be measured at the exhaust outlet under fullÐload operation, as needed.
¥ Verify that the type and amount of movement generated by the system are acceptable and do not cause damage to the installed product(s).
It is recommended that maintenance is performed monthly, or every 10 hours of operation, (whichever comes first).
Maintenance for a typical exhaust system installation will consist of physical and visual examination of the exhaust system for any sign of gas leakage, cracks, significant areas of damage or corrosion. Re-tighten any loose bolts if necessary. Apply new sealant as needed.
Note: If there is any indication of leaks or damage, cease operation immediately and conduct a broader inspection to determine the cause and resolve.