Step 8. Once the termination is positioned, secure it to the chase flashing using the stainless steel screws provided, through the pre- punched attachment holes in the attachment tabs of the termination. Be careful not to over tighten the screws so as to strip out the chase flashing. In the event of a strip, a larger screw can be used so long as it is stainless steel. DO NOT use common sheet metal screws, as they will corrode over time and the termination will no longer be secure at that point.
Step 9. Once the termination is permanently attached, seal all of the screw tops with silicone. In order to properly apply the silicone, the surface of the termination and screws must be clean and dry. Not sealing the screws tops will result in water leakage into the chase.
Chase |
| 2" | |
Flashing |
| (Max.) | |
|
| 3" | |
Chase |
| (Max.) | |
|
| ||
Pipe |
| 2 feet | |
Section | 2" | ||
(Max.) | |||
| |||
| (Min.) | 1 foot | |
|
| (Min.) | |
Strap |
|
| |
Support |
|
| |
Figure 3 |
|
| |
MAINTENANCE |
|
|
As part of an annual inspection, the termination should be checked for any foreign debris, animal or insect nests, or material of any kind which may have become lodged in it. The exterior of the termination should be visually inspected for damage of any kind.
In the event of damage to the termination, it should be replaced with a new termination. All screw attachments should be checked to insure they have not loosened over time and they should also be checked for the water tightness of their silicon seal. The termination must be removed to clean the chimney. Following cleaning, reinstall the termi- nation and inspect as detailed in this document.
VERTICAL VENT TERMINATION CLEARANCES
These instructions should be used as a guideline and do not super- sede local codes in any way. Install SV4.5 vent according to the current National Fuel Gas Code,
Terminate single vent caps relative to building components according to Figure 4.
Horizontal Overhang |
|
|
| 2 FT | Vertical |
2 FT MIN. | MIN. | Wall |
Lowest
Discharge
VentOpening
Termination
H*
X
12
Roof Pitch is X/12
*H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT
The vent/air intake termination clearances above the high side of an angled roof is as shown in the following chart:
Termination Heights For Vents Above Flat Or
Slopped Roofs Ref. NFPA 54 / ANSI Z223.1, 7.6
Roof Pitch | H | H | |
(feet) | (meters) | ||
| |||
Flat to 6/12 | 1.0 | 0.3 | |
Over 6/12 to 7/12 | 1.25 | 0.38 | |
Over 7/12 to 8/12 | 1.5 | 0.46 | |
Over 8/12 to 9/12 | 2.0 | 0.61 | |
Over 9/12 to 10/12 | 2.5 | 0.76 | |
Over10/12 to 11/12 | 3.25 | 0.99 | |
Over 11/12 to 12/12 | 4.0 | 1.22 | |
Over 12/12 to 14/12 | 5.0 | 1.52 | |
Over 14/12 to 16/12 | 6.0 | 1.83 | |
Over 16/12 to 18/12 | 7.0 | 2.13 | |
Over 18/12 to 20/12 | 7.5 | 2.29 | |
Over 20/12 to 21/12 | 8.0 | 2.44 |
Figure 4
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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