Dunkirk Q95M-200 Installation, Operation & Maintanance Manual page 6

4. The clearances shown in
per CSA listing. A minimum 1" clearance must be maintained
between combustible construction and each of the right, top
and back surfaces of the boiler. Allow at least 24" at the front
and left side and 8"at the top for servicing. No combustible
clearances are required to venting or combustion air intake
piping.
TABLE 3: BOILER CLEARANCES*
Combustible
Dimension
Construction
Top
Left Side
Right Side
Base
Front
Back
Intake/Vent Piping
Near Boiler Hot
Water Piping
* All distances measured from the cabinet of the boiler.
5. Equipment shall be installed in a location which facilitates the
operation of venting and combustion air intake piping systems
as described in this manual.
6. Advise owner of boiler to keep venting and combustion air
intake passages free of obstructions. Both the venting and com-
bustion air intake piping systems connected to the outdoors
must permit flow through the piping systems without restric-
tions for the boiler to operate.
7. The boiler shall be installed such that the automatic gas ignition
system components are protected from water (dripping, spray-
ing, rain, etc.) during operation and service (circulator replace-
ment, control replacement, etc.).
8. The boiler must be located where ambient room temperatures
(minimum possible temperatures where boiler is installed as-
suming boiler is not in operation and therefore contributes no
heat to the space) are always at or above 32°F to prevent freez-
ing of liquid condensate.
combustion air and vent pipe requirements
This boiler requires a dedicated direct vent system. In a direct vent
system, all air for combustion is taken directly from outside atmo-
sphere, and all flue products are discharged to outside atmosphere.
Combustion air and vent pipe connections must terminate together
in the same atmospheric pressure zone, either through the roof or
sidewall (roof termination preferred). See Figures 1 and 2 for re-
quired clearances. If necessary, use of screening no smaller than 1/2"
hardware cloth is acceptable.
v - before installinG the boiler
Table 3 indicate required clearances
Accessibility/
Service
Cleaning
1" 8"
1" 24"
1" -
1" -
0 24"
6" -
0 -
1" -
figure 1 - roof vent/intake terminations
8"
12" MIN ABOVE
HIGHEST ANTICIPATED
24"
-
-
24"
-
-
-
figure 2 - sidewall vent/intake terminations
VENT
MAX.
SEPARATION
MAXIMUM
LESS THAN 12" CLEARANCE ABOVE GRADE
VENT
BRACKET
MAXIMUM
SEPARATION
18"
MAXIMUM
12" OR MORE CLEARANCE ABOVE GRADE
6
3" MAX.
8" MAX.
SNOW LEVEL
EXHAUST
OVERHANG
12" MINIMUM
12" SEPARATION
BETWEEN BOTTOM OF
COMBUSTION AIR INTAKE
90°
AND BOTTOM OF VENT
MAINTAIN 12" MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL OR
GRADE
3"
15"
MAXIMUM
18"
OVERHANG
12" MINIMUM
12" SEPARATION
90°
BETWEEN BOTTOM OF
COMBUSTION AIR INTAKE
AND BOTTOM OF VENT
3"
MAINTAIN 12" MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL OR
GRADE
COMBUSTION AIR