Rear Vent Venting Runs - Montigo H34DF Installation Operation & Maintenance

Rear Vent Venting Runs

The H-Series DF Rear Vent has three possible installations which do
not require vertical lift, all of these installations require that you install
the RHS101 heat shield.
Heat Shield
The heat shield (RHS101) must be used on all installations straight
through the wall, at the point where the vent pipe connects to the
termination. With the heat shield, proper vent clearances can be
maintained. The heat shield is not included with the fireplace.
To install the heat shield, slide one section over the vent pipe on the inside
of the wall opening, with the circular portion inside the wall cavity. Screw
the shield in place over the wall opening. Install the second section on
the outside of the wall opening sliding the circular portion into the wall
opening. Refer to Figure 19.
Figure 19. Heat Shield. Install by sliding over the vent pipe where it
passes through combustible construction.
1. Straight Installation.
The height from the hearth to the center of the termination is 21
3/4". For straight installations use a 12" extension pipe (PXT-12)
with female/female connections. For shorter installations, cut the
PXT-12 to the desired length. Refer to figure 19a.
Ensure that the RHS101 heat shield is installed before attaching
the pipe to the termination.
Note: For Rear Vent models, maximum horizontal run with no
vertical lift must never exceed 12".
PXT-12
Figure 19. Extended installation.
Part No. XG0145
Installation
2. 45° Corner Installation.
Attach an EEL-45/PEL-45 (45° elbow) directly onto the flue collar.
Cut the EXT-18/PXT-20 to suit, and attach it to the EEL-45/PEL-45.
Slide the fireplace into position and attach to the termination.
Figure 20. Corner installation.
3. Corner Installation — 45° or less.
Use an MTO-3/PTO-3 termination and an MFL-1/PFL-1 or PFL-2/
PFL-2 (12" or 24" compressed length) and a frame, if appropriate.
Flex may be turned to obtain desired degree of angle required but
must not exceed 45°.
Figure 21. Flex installation. (NG Models Only)
Note: Through the wall venting kits are also available for both
the Straight and the Corner Installation. The Kit includes a heat
sheild, a PFL-18 (f/f) flexible pipe, and a termination with or without
a mounting frame.
Important: Some models are not available to be
installed in a rear vent application. Please refer to the
model specifications on page 2 of this manual.
H-Series DF Gas Fireplace
PXT-18
PEL-45 Elbow
PEL-90 Elbow
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