Montigo MW38 DV - Manual (Page 10)

Page 10 of 19
MW38-DV Modular Fireplace
P/N XG0112
Installation
Rear Vent
B. Multi-Elbow Installations
For more diffiicult installation situations, the MW38-DV 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:
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 18a
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. 18a) 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 36", this would be an acceptable
installation.
Example B: (Acceptable Installation)
If the vertical dimension from the hearth is 90" and
the horizontal run to the wall flange of the vent
termination is 126", this would be an acceptable
installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace
is 78" and the horizontal run to the wall flange of the
vent termination is 108", this would NOT be an
acceptable installation.
Figure 18a. MW38-DV Rear Vent Venting Graph
0 12 24 36 48 60 72 84 96 108 132 120 144 156 168 180
Horizontal Run (in.)
Hearth
0
12
24
36
48
60
72
84
96
108
Installation Of Rear Vent DV
MW38-DV Rear Vent versions are supplied with an EXT-18 (female/
female) section. In addition, the following venting components are
available for Rear Vent installations:
A - Termination MTO-3 (3" length)
MTO-3F (3" length)
B - Stucco Kits MSR (stucco frame)
BSR-4 (4" brick frame)
BSR-6 (6" brick frame)
MOSR (stucco can)
C - Solid section & elbow MIHR-6 (72" length)
MIHR-10 (120" length)
D - Flex sections MFL-1 (12" section)
MFL-18 (18" section)
MFL-2 (24" section)
MFL-3 (36" section)
MFL-4 (48" section)
E - Solid sections MEXT-1 (12" section)
MEXT-2 (24" section)
MEXT-3 (36" section)
MEXT-4 (48" section)
MEXT-6 (72" section)
F - 90 degree elbow MEL-90M (m/m 90° elbow)
MEL-90F (f/f 90° elbow)
MEL-90FM (f/m 90° elbow)
EEL-45 (f/m 45° elbow)
8"
H
L
Figure 18b.Multi-elbow installation. Distance 'H' must be a minumum
of 50". The vent run must comply with figure 18a.
NOTES: All dimension lengths for vertical or horizontal runs are
measured from center of the vent pipe.
Venting runs must fall within the limits set by the venting
graph (see Figure 18a).
min 8"
max 18"