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MD38-DV-2 Homefire
Part No. XG0111
Installation
Top Vent Venting Runs
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. 7) 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 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.
Figure 7.
Venting Graph
Figure 8.
Heat Shield. Install by sliding over the vent pipe where
it passes through combustible construction.
Heat Shields
Due to high flue temperatures, heat shields are required on all 38
Series Modular Direct Vent installations (except those with vertical
terminations) at the point where the
venting connects to the termination.
With the heat shield, vent clear-
ances can be maintained at 1".
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
Top Vent
Installation Of Top Vent DV
The following venting components are available for the MD38-DV-2
Top Vent:
A - Termination
MTO-3 (3" length)
MTO-3F (3" length)
B - Stucco Kits
MSR (stucco frame)
MOSR (stucco can)
BSR (brick 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
EXT-18 (18" f/f section)
MEXT-1 (12" m/f section)
MEXT-2 (24" m/f section)
MEXT-3 (36" m/f section)
MEXT-4 (48" m/f section)
F - Elbows
MEL-90M (m/m 90° elbow)
MEL-90F (f/f 90° elbow)
MEL-90FM (f/m 90° elbow)
EEL-45 (f/m 45° elbow)
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 7).
