Operating instructions

16
73D4125
KSTDV Series Gas Fireplace

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




The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable. Figure 9


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


         

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 finished outside wall.
• The maximum number of 90° elbows per side wall
installation is three (3). Figure 13
Figure 13 -
Maximum Three (3) 90° Elbows Per Installation
3 x 90° Elbows
24" Min.
FP1380
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36". Refer to Figures 13 and 14. This does not apply
if the 90° elbows are used to increase or redirect a verti-
cal rise. Figure 15
10'
(3m)
A
A + B = 17' (5.2m)
B
Figure 15 -
Maximum Vent Run with Elbows
FP2488
 According to the vent graph (page 16) the maxi-
mum horizontal vent length in a system with a 10' vertical
rise is 20’ (6 m) and if a 90° elbow is required in the hori-
zontal vent it must be reduced to 17' (5.2 m).
In Figure 15 dimension A plus B must not be greater than
17' (5.2 m).
• A minimum of 24" is required before a 90° elbow. If a 90°
elbow is fitted directly after 24" vertical section mounted
to the top of the fireplace, the horizontal vent run before
the termination must be 36” (914 mm). Figure 14
Max. 20"
(508mm)
Max. 36"
(914mm)
FP1381
Figure 14 -
Horizontal Run with Minimum Vertical Rise




24"
(610 mm)
Min.