Page 10
Part No. XG0106B
MD34-DV-2 Homefire
Installation
Rear Vent
B. Multi-Elbow Installations
For more diffiicult installation situations, the MD34-DV-2 Rear Vent may
be installed with 2 - 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 19
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. 19)
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 fire-
place is 78" and the horizontal run to the wall flange
of the vent termination is 108", this would NOT be
an acceptable installation.
Figure 19.
MD34-DV-2 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
MD34-DV-2 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)
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)
Figure 20.
Multi-elbow installation. Distance 'H' must be a minumum
of 50". The vent run must comply with figure 19.
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 19).
8"
H
L
min 8"
max 18"
