Venting Installation
Continued
When connecting chimney directly to the fireplace, the inner flue pipe section must be installed first with the lanced side up. The outer pipe section can then be installed over the flue pipe section with the hemmed end up. Press down on each pipe section until the lances securely engage the hem on the fireplace starter. The wire will assure the proper spacing between the inner and outer pipe
sections. Continue to assemble chimney sections as outlined, making sure that both the inner and outer pipe sections are locked together. When
installing double wall
it is important to assure the joint between the chimney sections is locked. Check by pulling chimney upward after locking. The chimney will not come apart if properly locked. It is not necessary to add
screws to keep the chimney together (exception -
see Figure 9, page 8).
Using ELBOW offsets
1.To achieve desired offset, you may install combinations of 12", 18", 24", 36" and 48" length of double wall pipe (see offset chart and Figure 7).
2.Chimney weight above offset rests on return elbow. Straps must be securely nailed to rafters or joists (see Figure 8, details A and B on page 8).
3.Maximum length of pipe between supports (return elbow or
4.All pipe connections between offset and return must be secured with two screws on outer pipe only (see Figure 9, page 8). Do not penetrate inner stainless.
OFFSET | RISE |
| CHIMNEY LENGTH |
| ||||
A | B | 48" | 36" | 24" | 18" | 12" | ||
4 3/8" | 16 3/8" |
|
| ELBOW | SET | ONLY |
|
|
9 3/4" | 25 1/2" |
|
|
|
|
|
| 1 |
12 3/4" | 30 3/4" |
|
|
|
| 1 |
|
|
15" | 34 3/4" |
|
|
| 1 |
|
|
|
18" | 40" |
|
|
|
| 1 |
| 1 |
21 1/4" | 46 1/4" |
|
| 1 |
|
|
|
|
23 3/4" | 49 1/4" |
|
|
| 1 | 1 |
|
|
27 3/4" | 56 3/4" | 1 |
|
|
|
|
|
|
30" | 60 3/4" |
|
| 1 |
| 1 |
|
|
33" | 66" | 1 |
|
|
|
|
| 1 |
36" | 71" | 1 |
|
|
| 1 |
|
|
38 1/4" | 75" |
|
| 2 |
|
|
|
|
41 1/4" | 80 1/4" |
|
| 1 |
| 1 |
| 1 |
45" | 86 3/4" |
|
| 2 |
|
|
|
|
46 3/4" | 89 1/2" | 1 |
|
|
| 1 |
| 1 |
51" | 97" | 1 |
| 1 |
|
|
|
|
53 1/4" | 101" |
|
| 2 |
| 1 |
|
|
56 1/4" | 106 1/4" | 2 |
|
|
|
|
|
|
59 1/4" | 111 1/2" | 1 |
| 1 |
| 1 |
|
|
61 3/4" | 115 1/2" | 2 |
|
|
|
|
| 1 |
64 3/4" | 120 3/4" | 2 |
|
|
| 1 |
|
|
68 1/4" | 127" | 1 |
| 2 |
|
|
|
|
70" | 130" | 2 |
|
|
| 1 |
| 1 |
74 1/4" | 137 1/2" | 1 |
| 2 |
|
|
| 1 |
76 3/4" | 141 1/2" | 1 |
| 2 |
| 1 |
|
|
79 3/4" | 146 3/4" |
|
| 4 |
|
|
|
|
OFFSET CHART
Return |
|
| Return |
|
Elbow |
|
| Elbow |
|
Offset | Offset |
| Return |
|
Elbow |
| Elbow |
| |
Elbow | 6' Max. |
| ||
6' Max. | Ceiling |
| ||
|
| |||
Return |
|
| Support Pipe |
|
Return |
| 6' Max. | ||
Elbow |
| |||
| Elbow |
|
|
|
6' Max. | Offset | Offset |
|
|
| ||
Offset | Elbow | 6' Max. Elbow | 6' Max. |
|
|
| |
Elbow |
|
|
|
A |
| B | C |
Figure 7 - Typical Offset Terminations
www.fmiproducts.com | 7 |