Montigo M38ODV ST - Manual (Page 7)

Page 7 XG0128
M38ODV-ST Direct Vented Fireplace
Installation
Reduced Clearance Installation
If your installation requires construction above the fireplace (TV
stand, bookshelf, window between rooms, etc.) you must use the
DVST-CNT Offset Box.
„ Min. framing height is 48" to the underside of
combustible materials.
„ Max. total horizontal vent length is 55" from the
center of the fireplace.
„ Use PEXT horizontal vent pipe to obtain desired
horizontal vent lengths.
55" Max.
DVST-CNT
Shelf
Header
49" Min.
39 3/4
Figure 9. Installation with the DVST-CNT Offset box.
Figure 10. End View of a DVST-CNT Installation.
39 3/4
C
C 16" Min.
Hearth
To maintain clearances
to combustibles, notch
studs at same height as
vent pipe when
horizontal vent run is
used. (see Figure 2a.)
Heat
Shield
Figure 8. Horizontal flex installation.
Hearth
Termination
Exterior
Wall
3' max.
Flex Section
Heat
Shield
Figure 7. Retracted installation.
Figure 6. Extended installation.
48"
Hearth
Flex Section
Termination
Exterior
Wall
126"
30" Max.
Solid Section w/
90° Elbow
Heat
Shield
Hearth
Flex Section
Solid Section w/
90° Elbow
Termination
Exterior
Wall
126"
150" max.
Heat
Shield
Heat Shields
Due to high flue temperatures, heat shields are
required on all M38ODV-ST installations at the
point where the venting passes through the
wall to connect to the termination.
Using the heat shield, vent clearances at this
point are 1" to combustible construction.
Example:
A 10' section and an elbow used in conjunction with 3 ft. flex section
(PFL-3) will, when extended in a five foot chase, allow for a maximum
horizontal run of twelve and one-half feet from the centre of the
fireplace to outside wall and a minimum of 7'6" when retracted in
opposite direction.
(See Figure 6 and 7.)
"D" flex sections and "E" solid sections may be used in conjunction with
one another to obtain different possible horizontal length installations.
NOTE: Flex section must not exceed maximum horizontal length of 3
feet.
(See Figure 8.)
Figure 5. Heat Shield. Install by sliding over the vent pipe where it
passes through combustible construction.