Montigo P42DF - Manual (Page 14)

Figure 14. Rear Vent Venting Graph for NG and LP wall mounted
terminations.
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.
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.
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.
27 1/2”
PXT Extension
RHS101 Heat
Shield
Termination
Hearth
Exterior
Wall
NOTE:
12” MAX. horizontal
run with no vertical lift.
12” MAX.
30” Max.
53” Min 12”
Max.
Flex or Rigid
Section
25 1/5”
Min.
27 1/2”
42”
53”
A
C
B
Acceptable vent run
within non-shaded area.
If your installation does not fall within
the venting parameters, please
contact a local Montigo dealer for
Power Venting options.
Unacceptable vent run
within shaded area.
12”
27.5”
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.
Note: Images are shown without screens for clarity purposes. However,
your fireplace should not be operated without proper installation of
screens.
Page 14
P42DF* Indoor Gas Fireplace
XG0195 - 150204.2
Installation