Lennox Hearth MERIT PLUS MP-36OD - Manual (Page 18)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 18
Offset Elevation Chart
A B FTF8-ES30 Number of FTF8 Chimney Sections
Offset Height Offset/Return FTF8-S4
(Inches) (Inches) Elbow Stabilizer 12" 18" 36" 48"
4 15 ³⁄₄ 1 0 0 0 0 0
9 24 ¹⁄₂ 1 0 1 0 0 0
12 29 ³⁄₄ 1 0 0 1 0 0
14 ¹⁄₄ 33 ¹⁄₂ 1 0 2 0 0 0
17 ¹⁄₄ 38 ¹⁄₂ 1 0 1 1 0 0
20 ¹⁄₄ 43 ³⁄₄ 1 0 0 2 0 0
21 45 ¹⁄₄ 1 0 0 0 1 0
22 ¹⁄₄ 47 ¹⁄₂ 1 0 2 1 0 0
25 ¹⁄₄ 52 ¹⁄₂ 1 0 1 2 0 0
26 ¹⁄₄ 54 ¹⁄₄ 1 0 1 0 1 0
27 55 ³⁄₄ 1 0 0 0 0 1
28 ¹⁄₄ 57 ³⁄₄ 1 0 0 3 0 0
29 ¹⁄₄ 59 ¹⁄₄ 1 0 0 1 1 0
31 ¹⁄₄ 63 1 0 2 0 1 0
32 ¹⁄₄ 64 ¹⁄₂ 1 0 1 0 0 1
34 ¹⁄₄ 68 ¹⁄₄ 1 0 1 1 1 0
35 ¹⁄₄ 69 ³⁄₄ 1 0 0 1 0 1
37 ¹⁄₄ 73 ¹⁄₄ 1 0 0 2 1 0
38 ¹⁄₄ 75 1 0 0 0 2 0
39 ¹⁄₄ 77 1 0 2 1 1 0
41 ¹⁄₂ 80 ¹⁄₂ 1 0 1 4 0 0
43 ¹⁄₄ 83 ³⁄₄ 1 0 1 0 2 0
44 ¹⁄₄ 85 ¹⁄₄ 1 0 0 0 1 1
45 ¹⁄₄ 87 ¹⁄₂ 1 0 0 3 1 0
46 ¹⁄₄ 89 1 0 0 1 2 0
48 ¹⁄₄ 91 ¹⁄₂ 1 0 2 0 2 0
49 ¹⁄₄ 94 ¹⁄₄ 1 0 1 0 1 1
50 ¹⁄₄ 95 ³⁄₄ 1 0 0 0 0 2
51 ¹⁄₄ 97 ³⁄₄ 1 0 1 1 2 0
54 ¹⁄₄ 103 1 0 0 2 2 0
55 ¹⁄₄ 104 ¹⁄₂ 1 0 1 0 0 2
56 ¹⁄₂ 106 ¹⁄₂ 1 0 2 1 2 0
58 ¹⁄₄ 109 ³⁄₄ 1 0 0 1 0 2
61 ³⁄₄ 116 1 1 1 0 3 0
64 ³⁄₄ 121 ¹⁄₄ 1 1 0 1 3 0
67 124 ³⁄₄ 1 1 2 0 3 0
68 ³⁄₄ 128 1 1 0 0 1 2
70 130 1 1 1 1 3 0
73 135 ¹⁄₄ 1 1 0 2 3 0
74 ³⁄₄ 138 ¹⁄₄ 1 1 0 0 0 3
79 145 ¹⁄₂ 1 1 1 0 4 0
80 147 ¹⁄₄ 1 1 1 0 0 3
82 150 ³⁄₄ 1 1 0 1 4 0
82 ¹⁄₄ 152 1 1 0 1 0 3
Table 4
Note: The return elbow assembly performs the
same function as a stabilizer. Consider this when
determining the need for a stabilizer.
Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure that
each subsequent chimney section is securely
attached by testing as noted above.
Return
Elbow
Figure 50
Gas Line Connection
Install a 1/2" gas supply line through fi replace
wall for connection to a decorative gas appliance
inside the fi rebox. Outside, the gas supply line
connects to a gas shut-off valve recessed fl ush
into the wall or fl oor. The valve should be con-
trolled by a removable valve key for safety.
Always plumb gas line installation per local
codes. Check all connections with a gas leak
detection solution for leaks (which will bubble
if present). Never test any gas line connection
with a match or open fl ame.
This provision is intended for connection to
a decorative gas appliance incorporating an
automatic shut-off device and complying with
the Standard for Decorative Gas Appliances for
installation in vented fi replaces, ANSI Z21.60
(1991) or American Gas Association draft re-
quirements for Gas-Fired Log Lighters for Wood
Burning Fireplaces, Draft No. 4 dated August,
1993. Install in accordance with the National
Fuel Gas Code, ANSI Z223.1. This complies
with the revised U.L. 127 standard.