Operating instructions
18
75D0004
MLDV Series Gas Fireplace
• The maximum number of 90° elbows per side wall installation is three (3). Figure 20
• If a 90° elbow is tted directly on the top of the replace, the maximum horizontal vent run before
the termination or a vertical rise is 36” (914 mm). Figure 21
The Vent Graph, showing the relationship between vertical and horizontal side wall venting, will help
to determine the various dimensions allowable. Figure 13
Minimum clearance between vent pipes and combustible materials is 3" on top and 1" from bottom
and sides unless otherwise noted (Exception: Outside wall with restop: 1" all around pipes are
allowed). If the vertical run is 7
1
/ feet or more, off the top of the replace, the clearance is 1" on all
sides of the horizontal run.
When vent termination exits through foundations less than 0" below siding outcrop, the vent pipe
must be ush with the siding.
It is best to locate the replace in such a way that minimizes the number of offsets and horizontal
vent length.
The horizontal vent run refers to the total
length of vent pipe from the ue collar
of the replace (or the top of the Transi-
tion Elbow) to the face of the nished
outside wall or the mounting ange of
the termination.
FP1176
max 90 bends
Figure 20 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90°
Elbows
3 x 90°
Elbows
FP1176
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
Figure 21 -
Maximum Horizontal Run with
No Rise
FP1177