Equivalent Feet Of Pipe; Pipe Selection Chart - Quadra-Fire CB1200MI-MBK Owner's Manual

CB1200-I Pellet Insert
C. Equivalent Feet of Pipe
The table below can help you calculate the equivalent feet of
pipe which is a method used to determine pellet vent size. See
Figure 14.1.
3 ft.
2 ft.
Figure 14.1
D. Pipe Selection Chart
The chart will help you in determing proper venting
size according to the equivalent feet of pipe calcuated
above and the altitude above sea level of this installa-
tion. See Figure 14.2.
Locate the calculated equivalent feet of pipe on
the vertical left side of the chart. Move to the right
horizontally on the chart until you reach your altitude
above sea level.
If you fall below the diagonal line, 3 or 4 inch (76 to
102mm) pipe may be used. If it is anywhere above
the diagonal line, a 4 inch (102mm) diameter pipe is
requried.
The chart reveals that a 90° elbow is 5 times as
restrictive to the fl ow of exhaust gases under positive
pressure as 1 foot of horizontal pipe, and a foot of
horizontal pipe is twice as restrictive as a foot of
vertical pipe.
Page 14
Example of 3 Elbow-Rear Vent Termination Calculation
2 ft.
2 ft.
Fire Risk.
Do NOT pack insulation or other combustibles between fi restops.
• ALWAYS maintain specifi ed clearances around venting and fi restop systems.
• Install fi restops as specifi ed.
Failure to keep insulation or other material away from vent pipe may cause fi re.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. Refer
to the owner's information manual provided with this appli-
ance. For assistance or additional information consult a
qualifi ed installer, service agency or your dealer.
Pellet Venting # of Feet of
Component Elbows Pipe
o
90 Elbow or Tee 3
o
45 Elbow
Horizontal Pipe
Vertical Pipe
Note: This is a generic example and is not
intended to represent any specifi c fuel type.
30
Example 1
20
Equivalent Pipe
Length In Feet
Example 2
10
3 in. or 4 in. (76mm or 102mm) Diameter Pipe
0
1
ALTITUDE IN THOUSANDS OF FEET
Figure 14.2
Example 1: If the equivalent length of pipe is 23 feet with altitude of
8,000 feet you must use 4 inch (102mm) diameter type "L" or "PL"
vent.
Example 2: If the equivalent length of pipe is 12 feet with altitude of
6,000 feet you may use 3 or 4 inch (76 to 102mm) diameter type "L"
or "PL" vent
WARNING
7014-188
WARNING
Multiplied Equivalent
By Feet
X 5
X 3
7 X 1
2 X 0.5
Total Equivalent Feet
4 in. (102mm) Diameter Pipe Only
2 3 4 5 6 7
September 16, 2009
R
Components
Equivalent Feet
15
7
1
23
8 9 10