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B. Multi-Elbow Installations
For more diffiicult installation situations, the H34D 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 46" (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. 22)
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 94" 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 22. H34D Rear Vent Venting Graph
Part No. XG0130
Installation
Installation Of Rear Vent DV
H34D 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
B - Stucco Kits
C - Flex sections
D - Solid sections
E - 90 degree elbow
NOTES:
Figure 23. Multi-elbow installation. Distance 'H' must be a minumum
of 46". The vent run must comply with figure 18a.
H34D Gas Fireplace
MTO-3 (3" length)
MTO-3F (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)
MEXT-1 (12" section)
MEXT-2 (24" section)
MEXT-3 (36" section)
MEXT-4 (48" 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)
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 23).
L
18"
8"
H
Page 11
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