Assemble Chimney Sections; Using Offsets/Returns - Heat & Glo RUTHERFORD-50 Owner's Manual

G. Assemble Chimney Sections
• Attach the first chimney section or offset onto
the top of the fireplace (Figure 8.3). Sheet metal
screws are required to connect chimney section
to the fireplace starter collar. Continue to add
additional sections of chimney as needed.
• Use a wall strap every eight feet of chimney
height.
• For each additional chimney section use four
of the sheet metal screws provided to make a
secure connection between the chimney sections
(Figure 8.4). Do not penetrate the inner liner of
the chimney.
Figure 8.3
Figure 8.4
26
H. Using Offsets/Returns
•
•
WARNING! Rish of Fire! DO NOT use offset/returns greater than
30'. Chimney draft will be restricted and could cause overheating
and fire.
•
•
•
Table 8.2
Vertical
Heat & Glo • RUTHERFORD-50 • 4059-333 Rev L• 5/11
Use an offset/return to bypass overhead obstructions.
An offset and return can be used as a single entity or separated
by chimney section(s).
Measure the shift required to avoid the overhead obstruction
(Offset, Figure 8.5).
Find the appropriate offset dimension listed in Table 8.2.
The rise (see Figure 8.5) coinciding with the offset dimension
measurement in Table 8.2 represents the required vertical
clearance needed to complete the offset/return.
Figure 8.5
Elbow Chimney
Angle Length
from Between Offset
Elbows Inches
15° 0
15° 12 in./305 mm
15° 18 in./457 mm
15° 36 in./914 mm
15° 48 in./1219 mm
30° 0
30° 12 in./305 mm
30° 18 in./457 mm
30° 36 in./914 mm
30° 48 in./1219 mm
RISE
OFFSET
Rise Offset
Inches Millimeters
2 5/8 21 5/8 67
5 1/2 32 1/4
140
7 1/8 38 181
11 3/4 55 3/8 298
14 7/8 67 378
6 1/4 24 1/2 159
11 3/4 34 298
14 3/4 39 1/4 375
23 3/4 54 7/8 603
29 3/4 65 1/4 756
Rise
Millimeters
549
819
965
1407
1702
622
864
997
1394
1657