Coaxial - ECR International Dunkirk DMG-240 Installation, Operation & Maintenance Manual

WARNING
!
• Covering non-metallic vent pipe and fittings with
thermal insulation shall be prohibited.
• Use of cellular core PVC for venting flue gas could
result in death, or serious injury.
• Concentric venting shall be fastened with screws.
Dual flue venting is NOT fastened with screws.
Maximum Length = L
A B
E F
Coaxial Elbows - Equivalent length
Elbow
45°
90°
Illustration shows examples of maximum equivalent lengths.
B. Coaxial Flue Options
• Standard horizontal termination is suitable only for
horizontal applications.
• Maximum permissible equivalent vent length is 21 ft.
(6.4 m)
• An "in line" elbows in flue system must be taken into
consideration.
• The first elbow in horizontal run is NOT included in any
equivalent length calculations
Elbow
45°
90°
6 - COMBUSTION AIR AND VENT PIPING
21' (6.4 m)
21' (6.4 m)
Total Length Reduction
1' 8" (0.5 m)
3' 4" (1.0 m)
L = L1 + L2
L2
L1
Total Length Reduction
1' 8" (0.5 m)
3' 4" (1.0 m)
FIGURE 6-2 Side Wall Coaxial Venting
2" (50 mm)
Slope vent pipes
min. 3/4" (2 cm)
for every 3¹/₂ ft.
(1.0m) back to
boiler
FIGURE 6-3 Roof Mount Coaxial Venting
20
18" Vertical
Clearance to
ventilated soffit
X
Min. 8" (181 mm)
Max. 14" (356 mm)
Maintain 12"(305mm)
US (18"(457mm)
Canada) clearance
above highest
anticipated snow level
24" (610mm) above
roof or ground
Anticipated
Snow Line
Ground
Maintain 12"(305mm)
US (18"(457mm)
Canada) clearance
above highest
anticipated snow level
Anticipated
24" (610mm) above
Snow Line
roof or ground
Anticipated
Snow Line
Ground
PN 240011656 REV. K [11/01/2020]