UTICA BOILERS UB90 125 Installation Manual And Operating Instructions page 7

SIDEWALL VENT/INTAKE TERMINATIONS
12"
MINIMUM
12"
MINIMUM
VENT
MAXIMUM
SEPARATION
18"
MAXIMUM
LESS THAN 12" CLEARANCE
12"
MINIMUM
12"
MINIMUM
BRACKET
MAXIMUM
SEPARATION
MAXIMUM
12" OR MORE CLEARANCE
If the concentric vent termination is being used, re-
fer to Figure 3 for proper setup.
CONCENTRIC VENT TERMINATIONS
1" MAXIMUM
12" MINIMUM
VENT
COMBUSTION AIR
!
CAUTION
Keep boiler area clean of debris and free of
flammable and combustible materials, vapors,
and liquids.
OVERHANG
12" MINIMUM
12" SEPARATION
BETWEEN BOTTOM OF
COMBUSTION AIR INTAKE
AND BOTTOM OF VENT
90°
MAINTAIN 12" MINIMUM
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL OR
GRADE
3"
15"
MAXIMUM
OVERHANG
12" MINIMUM
VENT
12" SEPARATION
BETWEEN BOTTOM OF
90°
COMBUSTION AIR INTAKE
AND BOTTOM OF VENT
MAINTAIN 12" MINIMUM
3"
CLEARANCE ABOVE HIGHEST
ANTICIPATED SNOW LEVEL OR
GRADE
18"
Figure 2
ROOF
OVERHANG
12" MINIMUM
MAINTAIN 12" IN. CLEARANCE
ABOVE HIGHEST ANTICIPATED
SNOW LEVEL OR GRADE
Figure 3
!
!
FAILURE TO FOLLOW THESE WARNINGS
COULD RESULT IN FIRE, PROPERTY
DAMAGE, PERSONAL INJURY, OR DEATH.
When vent pipe is exposed to temperatures
below freezing, such as when it passes through
an unheated space or when a chimney is used
as a chaseway, vent pipe must be insulated
with 1/2"Armaflex or equivalent. In extremely
cold climate areas, use 3/4"Armaflex or
equivalent.
Combustion air must be clean outdoor air.
Combustion air must not be taken from inside
the structure because that air is frequently
contaminated by halogens, which include
fluorides, chlorides, phosphates, bromides
and iodides. These elements are found in
aerosols, detergents, bleaches, cleaning
solvents, salts, air fresheners, paints,
adhesives, and other household products.
Locate combustion air inlet as far away as
possible from swimming pool and swimming
pool pump house. All combustion air and
vent pipes must be airtight and watertight.
Combustion air and vent piping must also
terminate exactly as shown in Figures 1-2. If
a concentric vent termination is being used,
refer to Figures 3-5 for proper setup.
Vent connections serving appliances vented
by natural draft shall not be connected into any
portion of mechanical draft systems operating
under positive pressure.
Solvent cements are combustible. Keep away
from heat, sparks, or open flame. Use only in
well ventilated areas. Avoid breathing in vapor
or allowing contact with skin or eyes.
CONCENTRIC VENT
7
!
WARNING
Figure 4