10
Outdoor Crest Supplemental Manual
1 Determine boiler location
Outdoor venting
• Vent materials for outdoor venting are to be field supplied.
• The vent must terminate at least 36 inches above the top of
the unit.
• All vent materials must be supported as recommended by
the vent manufacturer.
Before installing a venting system, follow
all requirements found in the Outdoor
Venting section of this manual.
NOTICE
Only install outdoor models outdoors,
and only use the vent caps specified in
this manual. Personal injury or product
damage may result if any other cap is used,
or if an indoor model is used outdoors.
Properly install all covers, doors, and jacket
panels to ensure proper operation and
prevent a hazardous condition.
Units are self-venting and can be used outdoors when installed
with the optional outdoor kit.
Combustion air supply must be free of contaminants To prevent
recirculation of the ue products into the combustion air inlet,
follow all instructions in this section.
⚠WARNING
For outdoor models, you must install a flue termination. Do
not install outdoor models directly on the ground. You must
install the outdoor unit on a concrete, brick, block, or other
non-combustible pad.
Keep venting areas free of obstructions. Keep area clean
and free of combustible and flammable materials. Maintain
minimum clearances to combustible surfaces and a 36"
(915 mm) minimum clearance to the air inlet. To avoid a
blocked air inlet or blocked flue condition, keep the air inlet,
flue outlet, and condensate trap clear of leaves, debris, etc.
Do not locate unit so that high winds can deflect off of
adjacent walls, buildings, or shrubbery causing recirculation.
Recirculation of flue products may cause operational
problems, bad combustion, or damage to controls.
Multiple unit outdoor installations require 48" (1.22 m)
clearance between each vent cap. Locate outdoor cap at
least 48" (1.22m) below and 48" (1.22 m) horizontally from
any window, door, walkway, or gravity air intake.
Locate unit at least 10 feet (3.05 m) away from any forced
air inlet.
Locate unit at least 3 feet (0.91 m) outside any overhang.
Clearances around outdoor installations can change with
time. Do not allow the growth of trees, shrubs, or other
plants to obstruct the proper operation of the outdoor vent
system.
Do not install in locations where rain from building runoff
drains will spill onto the unit.
Some discoloration to exterior building or unit surfaces can
be expected. Adjacent brick or masonry surfaces should be
protected with a rust resistant sheet metal plate.
Outdoor vent / air inlet location
Keep venting areas free of obstructions. Keep area clean
and free of combustible and ammable materials. Maintain
minimum clearances to combustibles as stated in this manual.
DO NOT install units in areas that contain
corrosive contaminants (see Table 1A on
page 8). Failure to comply could result in
severe personal injury, death, or substantial
property damage.
⚠WARNING
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