21
4. Cut a hole for Concentric Vent kit.
a. Cut a 4 inch (102 mm) diameter hole for size 100
unit, 2 inch (51 mm) concentric vent kit.
b. Cut a 5 inch (127 mm) diameter hole for size 200
unit, 3 inch (76 mm) concentric vent kit.
c. Cut a 6 inch (152 mm) diameter hole for size
300/400 unit, 4 inch (102 mm) concentric vent
kit.
5. Partially assemble Concentric Vent kit. Follow venting
instructions for cleaning and cementing.
a. Cement “Y” fitting to larger diameter air inlet pipe
(Figure 13).
b. Cement combustion air inlet cap to smaller
diameter flue pipe (Figure 13).
6. Install “Y” fitting and pipe assembly through hole.
7. Install combustion air inlet cap and large diameter
pipe assembly. Cement and fully insert small diameter
pipe in “Y” concentric fitting.
8. Secure to structure using metal strapping or equivalent
support material (field supplied); refer to Figure 14.
9. Cement combustion air and vent pipes to concentric
vent kit. Refer to Figure 14 for proper pipe attachment.
10. Check installation by allowing unit to run through one
cycle.
Figure 14 - Horizontal Concentric Vent Kit
Installation
SEPARATED COMBUSTION – CONCENTRIC VENTING (continued)
MAX.60"
(1524 mm)
1" (25 mm) COMBUSTION AIR
INLET VANES TO WALL
COMBUSTION AIR
VENT
NOTE: SECURING STRAP MUST BE INSTALLED TO PREVENT
MOVEMENT OF TERMINATION KIT INSIDE WALL
EXHAUST
ELBOW
(FIELD SUPPLIED)
COMBUSTION AIR
STRAP (FIELD SUPPLIED)
CAT-10074A
MAINTAIN 12" (305 mm) CLEARANCE
ABOVE HIGHEST ANTICIPATED
SNOW LINE OR GRADE
36" MINIMUM
(915 mm)
1"
(25 mm)
CAT-10072A
ROOF OVERHANG
COMBUSTION
VENT
AIR
MAINTAIN 12" (305 mm) CLEARANCE
ABOVE HIGHEST ANTICIPATED
SNOW LINE OR GRADE
36" MINIMUM
(915 mm)
12" MINIMUM
(305 mm)
1"
(25 mm)
CAT-10071A
ROOF OVERHANG
COMBUSTION
VENT
AIR
1"
(25 mm)
12" (305 mm) MINIMUM
4" (102 mm) MAXIMUM
OR 24" (610 mm) MINIMUM
(BETWEEN END BELL EDGES)
MAINTAIN 12" (305 mm)
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LINE OR GRADE
CAT-10073A
COMBUSTION
VENT
AIR
Figure 15 - Horizontal Sidewall Concentric Venting,
Single Termination
Figure 16 - Horizontal Sidewall Concentric Venting,
Multiple Unit Vertical Layout
Figure 17 - Horizontal Sidewall Concentric Venting,
Multiple Unit Horizontal Layout
