Lennox Merit MLDVT-45NE, Installation Instructions Manual

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9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
FIREPLACE SPECIFICATIONS
Vent Size
Co-axial DV
Vent Size
4-/2" Inner
7-/2" Outer
Vertical Venting Through the Ceiling:
Frame ceiling opening -
Use a plumb line from the ceiling above the appliance to
locate center of the vertical run. Cut and/or frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about this center mark
(see Figure 16) .
Notes
All specifications, ratings and
dimensions are subject to change
without notice.
Input (BTU) - MV & Electronic
Natural & Propane Gas
Models Input Rate (BTU / HR)
MLDVT-30N 3,500
MLDVT-30P 2,500
MLDVT-35N 6,000
MLDVT-35P 5,000
MLDVT-40N 22,000
MLDVT-40P 20,000
MLDVT-45N 23,000
MLDVT-45P 22,000
Efficiencies %
Natural Gas Propane
Models AFUE P4 AFUE P4
MLDVT-30 57 55.6 58 56.
MLDVT-35 57.5 55.6 59.0 58.
MLDVT-40 63 58.6 62.3 59.5
MLDVT-45 63 60 64 62
Viewable Glass Size
30" Model
24-/4" Wide
20-/4" High
35" Model
29-/4" Wide
20-/4" High
40" Model
34-/4" Wide
25-/4" High
45" Model
39-/4" Wide
25-/4" High
Figure 12
Framing
A
B
C
7
(78)
5-/8
2-/8
(308)
0-/2
(
267
)
VENT FRAMING -
TOP VENT WITH ONE
90
°
ELBOW
Framing should be constructed
of 2x4 or larger lumber
Inches (mm)
D
(30)
D is the required framing depth dimension when the
finish material (drywall) thickness is /2 in. (3mm)
A
/2
Framing Dimensions
Model No. A B C D
MLDVT-30
in. 30-/4 35-/4 39-/4 6
mm 768 895 997 406
MLDVT-35
in. 35-/4 35-/4 39-/4 6
mm 895 895 997 406
MLDVT-40
in. 40-/4 40-/4 44-/4 6
mm 022 022 24 406
MLDVT-45
in. 45-/4 40-/4 44-/4 6
mm 49 022 24 406
. o N l e d o M E F G H
J
K
L M
. n i
m m
MLDVT-35
32-/4
89
28-/8
75
23-/4
587
32
83
35-/4
892
25
635
2-/2
37
33
838
. n i
m m
MLDVT-40
37-/4
946
33-/8
84
28-/4
74
37
940
40-/4
09
30
762
5
38
38
965
. n i
m m
MLDVT-30
32-/4
89
28-/8
75
23-/4
587
27
686
30-/4
768
20
508
0
354
28
7
. n i
m m
MLDVT-45
37-/4
946
33-/8
84
28-/4
74
42
067
45-/4
49
35
889
7-/2
445
43
092
J
Front View
H
G
F
E
M
K
L
Top View
*CONCENTRIC FLUE
FLUE - 4-/2 (4)
COMBUSTION AIR
- 7-/2 (90)
9-/4 (235)
/2
(3)
6 (406)
-5/8 (42)
NOTE - Eyebrow
hood shown.
GAS INLET
KNOCKOUT
(Other Side)
Right Side View
5-7/8
(49)
NOTE - It is recommedned that the gas be studed in from the left
side only.
3 (76)
3 (76)
9-/2
(24)
ELECTRICAL INLET
KNOCKOUT - 2-3/4 X 2
(70 X 5) COVER PLATE
(With KNOCKOUT -
Right Side Only)
OPTIONAL
ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED
JUNCTION BOX
(Either Side)