Montigo L42DF Installation & Maintenance Manual page 14

L42DF* Indoor Gas Fireplace
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 17.
■ Fireplace must be converted to Rear Vent configuration prior to
running vent, see Figure 7 and 8.
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 17 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:
If the vertical dimension from the hearth is 48" and the horizontal run to 12" MAX. horizontal run with no vertical lift,
N.G. ONLY.
the wall flange of the vent termination is 72", this would be would not
be an acceptable installation.
Example C: (Unacceptable Installation)
If the vertical dimension from the floor of the fireplace is 60" and the
horizontal run to the wall flange of the vent termination is 144", this
would not be an acceptable installation.
Hearth
Acceptable vent run
within non-shaded area.
B
50"
48"
26 5/8"
12" N.G. ONLY
Figure 17. Rear Vent Venting Graph for wall mounted
terminations.
Page 14
Installation
PXT Extension
RHS101 Heat
Shield
Termination
12" MAX.
26 5/8"
Exterior
Wall
A
C
Unacceptable vent run
within shaded area.
If your installation does not fall
within the venting graph para-
meters, please contact Montigo
for Power Venting options.
NOTE:
12" MAX. horizontal run with no vertical lift,
N.G. ONLY.
Hearth
Figure 17a. Straight run, Rear Vented, wall mounted
termination for L42DF*, Figure 17.
Flex or Rigid
Section
12"
Max.
Figure 17b. 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 17.
WARNING:
An inspection of the explosion relief flappers and door
MUST be made prior to lighting the fireplace. A faulty seal
on the door gasket and/or explosion ports will result in
products of combustion leaking into the living space and
may result in carbon monoxide poisoning.
PXT Extension
RHS101 Heat
Shield
Termination
12" MAX.
26 5/8"
Exterior
Wall
36" Max.
23 3/8"
Min.
50" Min.
26 5/8"
XG0181 - 112811