Montigo B34DV Installation, Operation & Maintenance Manual page 13

B. Multi-Elbow Installations
For more difficult installation situations, the B-Series DV-2 Rear Vent
may be installed with two - 90° elbows and up to 15' of horizontal run. If
using this installation option, you must adhere to the following guidelines:
Important: Some models are not available to be installed in a
rear vent application. Please refer to the model specifications
on page 3 of this manual.
the first 90° elbow must be placed directly on the flue collar

you must have a minimum vertical lift of 50" (measured from the

hearth)
your vent run must fall within the limits set by Figure 20.

Before you install any venting, you must determine whether the venting
run will be acceptable. Unacceptable venting can affect the fireplace's
combustion.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of the
termination and the horizontal run from the from the fireplace flue collar
to the wall flange of the termination. Plot on the Venting Graph (Fig. 20)
with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
Example A: (Acceptable Installation)
If the vertical dimension from the hearth is 84" and the horizontal
run to the wall flange of the vent termination is 30", this would
be an acceptable installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 108" and the
horizontal run to the wall flange of the vent termination is 120",
this would be an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 72"
and the horizontal run to the wall flange of the vent termination
is 84", this would NOT be an acceptable installation.
A
C
50"
32 "
Figure 20. B-Series DV-2 Multi-Elbow Venting Graph.
Part No. XG0160 - 151125
Installation
B
Installation of Rear Vent DV-2
The following venting components are available from a B-Series
DV-2 in a Rear Vent Installation:
A - Termination
B - Stucco Kits
C - Flex Sections
D - Rigid
Sections
E - Elbows
All dimension lengths for vertical or horizontal runs
NOTES:
are measured from center of the vent pipe.
Venting runs must fall within the limits set by the
venting graph (see Figure 20).
18"
Max.
Figure 21. Multi-elbow installation. (For the B-Series the
vertical distance must be a minimum of 50". The
vent run must comply with the Graph, figure 20).
B-Series DV-2 Gas Fireplace
4" / 7" Venting
MTO -4 (3" Length)
MTO-4F (3" Length)
MSR (Stucco Frame)
BSR-4 (4" Brick Frame)
BSR-6 (6" Brick Frame)
MOSR (Stucco Can)
MFL-1 (12" Section)
MFL-2 (24" Section)
MFL-3 (36" Section)
MFL-4 (48" Section)
MFL-6 (72" Section)
MEXT-1 (12" m/f Section)
EXT-18 (18" f/f section)
MEXT-2 (24" m/f Section)
MEXT-3 (36" m/f Section)
MEXT-4 (48" m/f Section)
MEXT-6 (72" m/f Section)
MEL-90MM (m/m 90° Elbow)
MEL-90FF (f/f 90° Elbow)
MEL-90FM (f/m 90° Elbow)
EEL-45 (f/m 45° Elbow)
15' Max.
50"
Min.
Page 13