Rear Venting Graph P42, Pl42 - Montigo P38 Installation & Maintenance Manual

Rear Venting Graph P42, PL42:

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
11 or 11.b with an 'X'.
If the 'X' falls on or above the top boundary of the shaded area, the
installation is acceptable.
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 11 or 11.b
• Fireplace must be converted to Rear Vent configuration prior to
running vent, see Figure 8 and 8a.
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 144", this would be an
acceptable installation.
Example B: (Unacceptable Installation)
If the vertical dimension from the hearth is 36" and the horizontal run
to the wall flange of the vent termination is 84", 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.
NATURAL GAS AND PROPANE VENT RUN
132
120
Acceptable vent run
within non-shaded area.
108
96
84
72
60
48
53''
36
42''
24
27½''
12
12''
0
0 12 24 36 48 60
Horizontal Run (In.)
Figure 11. PL42DF* Rear Vent Venting Graph for NG and propane wall mounted terminations.
20
A
C
B
Unacceptable vent run
within shaded area.
72 84 96 108 120 132 144 156 168 180
Hearth
Hearth
Figure 11.b Straight run, Rear Vented, wall mounted termination. The vent run must comply with
the Venting Graph for Rear vent, wall mounted terminations, Figure 11. NOTE: Straight through
the wall rear vent available for Natural Gas only.
Flex or Rigid
Flex or Rigid
Section
Section
Max.
Max.
Figure 11.c Rear Vented, wall mounted Multi-elbow termination installation. The vent run must
comply with the Venting Graph for Rear vent, wall mounted terminations, Figure 11.b
Installation
NOTE: 12'' MAX horizontal
run with no vertical lift
PXT Extension
PXT Extension
RHS101 Heat
RHS101
Shield
Heat Shield
Termination
Termination
12" MAX.
12'' MAX
26 3/8"
27 3/8''
Exterior
Exterior
Wall
Wall
30'' Max.
30" Max.
for minimum
vertical
25 1/5''
Min.
49" Min NG
53'' Min.
63" Min LP
12"
12''
26 3/8"
27 1/2''
XG0199 - 170223