Dunkirk GWB9-050IH-2, Installation Instructions Manual

Page: 26 / 56

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Figure 15 - Concentric Vent Terminations
Combustion
Air
Vent
1" (2.54cm)
Maximum
Maintain 12"
clearance above
highest anticipated
snow level or grade
* See Note
Below
Vent
Combustion
Air
36"(0.9m) Minimum
Maintain 12"(30cm)
clearance above highest
anticipated snow level or
grade
12" (30cm) Minimum
*Must be less than 4" or greater than 24" Horizontal dis-
tance between end bells of each air intake to prevent fl ue
gas recirculation.
1" (2.54cm)
Maximum
Overhang
VENT
COMBUSTION AIR
COMBUSTION
AIR
1” MAXIMUM
NOTE:
SECURING STRAP MUST BE FIELD INSTALLED TO
PREVENT MOVEMENT OF TERMINATION KIT IN SIDE
WALL.
ELBOW
(FIELD SUPPLIED)
A
A
B
B
C
C
STRAP
(FIELD SUPPLIED)
VENT
Figure 16 - Concentric Vent
COMBUSTION AIR AND VENT PIPE
Figure 17 - Concentric Vent Roof
Installation
VEN T
VEN T
A
A
B
B
C
C
D
D
CO M
AIR
CO M B U S T ION AIR
ROOF BOO T/ FLASHING
( FIELD S UPP LIED )
ELBOW
( FIELD S UPP LIED )
S UPP OR T
( FIELD S UPP LIED )
M AIN T ANIN 1 2 IN .
(18 IN . FOR CANADA )
M INI MUM CLEARANCE
ABOVE HIGHES T
AN T ICI P A T ED SNOW
LEVEL . M A X I MUM OF
2 4 IN . ABOVE ROOF
NO T E :
S UPP OR T MU S T BE
FIELD INS T ALLED T O
SEC U RE T ER M INA T ION
K I T T O S T R U C TU RE .