Montigo L42DFN Installation & Maintenance Manual page 17

Notes Wall Mounted Terminations: REAR VENT
■ 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 graphs,
see Figure 16.
■ Fireplace must be converted to Rear Vent configuration prior to
running vent, see Figure 10 and 10a.
The Venting Graph
Measure the vertical height from the fireplace hearth to the centre of the
termination and the horizontal run from the fireplace flue collar to the wall
flange of the termination. Plot on the Venting Graph Figure 16 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 120" and the horizontal
run to the wall flange of the vent termination is 138", this would be an
acceptable installation.
Example B: (Unacceptable Installation)
NOTE:
12" MAX. horizontal run with no vertical lift,
If the vertical dimension from the hearth is 48" and the horizontal run
N.G. ONLY.
to the wall flange of the vent termination is 96", this would NOT 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 120", this
would NOT be an acceptable installation.
Acceptable vent run
Hearth
within non-shaded area.
B
50"
48"
26 5/8"
12" N.G. ONLY
Figure 16. Rear Vent Venting Graph for wall mounted terminations.
XG0181 - 150204
Installation
PXT Extension
RHS101 Heat
Shield
Termination
12" MAX.
26 5/8"
Exterior
A
Wall
C
Unacceptable vent run
within shaded area.
If your installation does not fall within
the venting parameters, contact a
local Montigo dealer for Power
Venting options.
NOTE:
12" MAX. horizontal run with no vertical lift,
N.G. ONLY.
Hearth
Figure 16a. Straight run, Rear Vented, wall mounted termination
for L42DF*, Figure 16.
Flex or Rigid
Section
12"
Max.
Figure 16b. Rear Vented, wall mounted Multi-elbow termination
installation. Installation for L42DF* must have a minimum vertical
rise of 50".The vent run must comply with the Venting Graph for
Rear vent, wall mounted terminations, Figure 16.
L42DF* Indoor Gas Fireplace
PXT Extension
RHS101 Heat
Shield
Termination
12" MAX.
26 5/8"
Exterior
Wall
36" Max.
23 3/8"
Min.
50" Min.
26 5/8"
Page 17