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MD38-DV-2 Homefire
Part No. XG0111
Installation
Rear Vent
B. Multi-Elbow Installations
For more diffiicult installation situations, the MD38-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:
n
the first 90° elbow must be placed directly on the flue collar
n
you must have a minimum vertical lift of 50" (measured from the
hearth)
n
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.
MD38-DV-2 Rear Vent Venting Graph
8"
H
L
Figure 18b.
Multi-elbow installation. Distance 'H' must be a minumum
of 50". The vent run must comply with figure 18a.
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
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).
Installation Of Rear Vent DV
MD38-DV-2 Rear Vent versions are supplied with an EXT-18
(female/female) section. In addition, the following venting compo-
nents 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)
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)
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)
min 8"
max 18"
