Horizontal Termination Configuration - Monessen Hearth BDV300 Installation And Operating Instructions Manual

BDV Series Gas Fireplace
hORIZONtAL tERMINAtION cONFIGuRAtIONS
Since it is very important that the venting system maintain its bal-
ance between the combustion air intake and the flue gas exhaust,
certain limitations as to vent configurations apply and must be
strictly adhered to.
The Vent Graph, showing the relationship between vertical and hori-
zontal side wall venting, will help to determine the various dimensions
allowable. Figure 20
NOTE: Horizontal sections of this vent system require a minimum of 3"
clearances to combustibles at the top of the flue unless the vertical run is
1
7 / feet or higher (top vent units only), the clearances for the horizontal
2
run is 1" at the top, and 1" clearance at the sides and bottom until the
flue penetrates the outside wall. A minimum 1" clearance all around the flue
is acceptable at this point of penetration.
Vertical sections of this vent system require a minimum of 1" clearance to
combustibles on all sides of the pipe.
When vent exits through foundations less than 20" below outcrop, the
termination must be flush up with outcropped wall above.
It is best to locate the fireplace 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 flue collar of the fireplace (or the top of the
Transition Elbow) to the face of the outer wall.
• The maximum number of 90° elbows per side wall
installation is three (3). Figure 21
• If a 90° elbow is fitted directly on top of the fireplace
flange the maximum horizontal vent run before the termination or a vertical rise is 36"
(914 mm). Figure 22
3 x 90°
Elbows
FP1176
Figure 21 - Maximum Three (3)
90° Elbows Per Installation
0
FP1176
max 90 bends
3 x 90°
Elbows
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
20"
6
4
2
Horizontal Dimension From the Outside of
Termination to the Back of the Fireplace
Figure 20 - Rear Wall Venting Graph
When installing the appliance as a rear
vent unit, the 90° or 45° transition elbow
attached directly to the rear of the unit is
NOt INcLuDED in the following criteria
and calculations, and unless specifically
mentioned should be ignored when
calculating venting layouts.
36"
(914 mm)
Max.
FP11777
Figure 22 - Maximum Horizontal Run with No Rise
Max 20"
VENt INStALLAtION
eg: A
2 4 6 8 10 12 14 16 18 20
FP2097
sidewall vent graph
36"
(914 mm)
Max.
54D0700