Montigo PL42DF Installation & Maintenance Manual page 15

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 14.
■ Fireplace must be converted to Rear Vent configuration
prior to running vent, see Figure 8 and 8a.
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 14 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)
If the vertical dimension from the hearth is 48" and the horizontal
run to the wall flange of the vent termination is 72", this 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.
Acceptable vent run
within non-shaded area.
B
53"
42 "
27.5 "
12 "
Figure 14. Rear Vent Venting Graph for NG and LP wall mounted
terminations.
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.
XG0217 -160215.1
Installation
A
C
Unacceptable vent run
within shaded area.
If your installation does not fall within
the venting parameters, please
contact a local Montigo dealer for
Power Venting options.
NOTE:
12" MAX. horizontal
run with no vertical lift.
Hearth
Figure 14a. Straight run, Rear Vented, wall mounted termination.
The vent run must comply with the Venting Graph for Rear vent,
wall mounted terminations, Figure 14.
Flex or Rigid
Section
12"
Max.
Figure 14b. Rear Vented, wall mounted Multi-elbow termination
installation. The vent run must comply with the Venting Graph for
Rear vent, wall mounted terminations, Figure 14.
Note: Images are shown without screens for clarity purposes.
However, your fireplace should not be operated without proper
installation of screens.
PL42DF* Indoor Gas Fireplace
PXT Extension
RHS101 Heat
Shield
Termination
12" MAX.
27 1/2"
Exterior
Wall
30" Max.
25 1/5"
Min.
53" Min
27 1/2"
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