INSTALLATION
Diagram 8
3)To install the Round Support Box/Wall Thim- ble in a fl at ceiling, cut a 10 inch square hole in the ceiling centred on the hole drilled in Step 2. Frame the hole as shown in diagram 9.
Diagram 9
4)Assemble the desired lengths of black pipe and elbows necessary to reach from the appliance adapter up though the Round Support Box. Insure that all pipes and elbow connections are in the fully
Diagram 10: The upper half of the fl ashing is installed under the roofi ng material and not nailed down until the chimney is installed. This allows for small adjustments.
Note: If an offset is necessary in the attic to avoid obstructions, it is important to support the vent pipe every 3 feet, to avoid excessive stress on the elbows, and possible separation. Wall straps are available for this purpose. See diagram 5.
Galvanizedpipeandelbowsmaybeutilized in the attic as well as above the roofl ine. The galvanized fi nish is desirable above the roofl ine due to its higher corrosion resistance.
Continue to add pipe sections through the
flashing until the height of the vent cap meets the minimum height requirements specifi ed in diagram 11 or local codes. Note that for steep roof pitches, the vertical height must be increased. A poor draft, or down drafting can result from high wind conditions near big trees or adjoining roof lines, in these cases, increasing the vent height may solve the problem.
7)Ensure vent is vertical and secure the base of the fl ashing to the roof with roofi ng rails, slide storm collar over the pipe section and seal with a mastic.
8)Install the vertical termination cap by twist locking it.
Notes:
a)For multistorey vertical installations, a Ceiling Fire stop (Part # 963) is required at the second floor, and any subsequent fl oor. Diagram 12. The opening should be framed to 10 " x 10" inside dimen- sions, in the same manner as shown in diagram 9.
b)Any occupied areas above the first floor, including closets and storage spaces, through which the vertical vent passes, must be enclosed.
Diagram 12
Note: For best results and optimum performance with each approved venting system, it is highly recom- mended to apply
5)Cut a hole in the roof centred on the small drilled hole placed in the roof in Step 2. The hole should be of suffi cient size to meet the minimum requirements for clearance to combustibles of
6)Continue to assemble pipe lengths.
Diagram 11
Roof Pitch | Minimum Vent Height | |
| Feet | Meters |
fl at to 7/12 | 2 | 0.61 |
over 7/12 to 8/12 | 2 | 0.61 |
over 8/12 to 9/12 | 2 | 0.61 |
over 9/12 to 10/12 | 2.5 | 0.76 |
over 10/12 to 11/12 | 3.25 | 0.99 |
over 11/12 to 12/12 | 4 | 1.22 |
over 12/12 to 14/12 | 5 | 1.52 |
over 14/12 to 16/12 | 6 | 1.83 |
over 16/12 to 18/12 | 7 | 2.13 |
over 18/12 to 20/12 | 7.5 | 2.29 |
over 20/12 to 21/12 | 8 | 2.44 |
|
|
|
Offset Chart
Hampton® | 25 |