Table of Contents
Advertisement
10
burner and ignition devices are well off the floor.
• When raising the boiler ensure the entire bottom and
fully filled weight of the boiler are fully supported.
• Locate or protect the boiler so it cannot be damaged by
a moving vehicle.
The space must be provided with correctly sized combustion/
ventilation air openings for all other appliances located in the
space with the boiler. For power venting installations using room
air for combustion, refer to the venting section, this manual, for
descriptions of confined and unconfined spaces. Do not install
the boiler in an attic. Failure to comply with these warnings
could result in substantial property damage, severe personal
injury, or death.
F. Exhaust Vent and Intake Pipe
The boiler is rated ANSI Z21.13 Category IV (pressurized vent,
likely to form condensate in the vent) and requires a special vent
system designed for pressurized venting.
NOTE: The venting options described here (and further
detailed in the Venting section, this manual) are the lone
venting options approved for this boiler. Failure to vent the
boiler in accordance with the provided venting instructions
will void the warranty.
Failure to vent the boiler properly will result in serious personal
injury or death.
Do not attempt to vent this boiler by any means other than
those described in this manual. Doing so will void the warranty
and may result in severe personal injury or death.
Vents must be properly supported. Boiler exhaust and intake
connections are not designed to carry heavy weight. Vent
support brackets must be within 1' of the boiler and the balance
at 4' intervals. Boiler must be readily accessible for visual
inspection for first 3' from the boiler. Failure to properly support
vents could result in property damage, severe personal injury,
or death.
The exhaust discharged by this boiler may be very hot. Avoid
touching or other direct contact with the exhaust gases of the
vent termination assembly. Doing so could result in severe
personal injury or death.
1. Direct Vent of Exhaust and Intake
If installing a direct vent option, combustion air must be drawn
from the outdoors directly into the boiler intake and exhaust
must terminate outdoors. There are three basic direct vent
options detailed in this manual: 1. Side Wall Venting, 2. Roof
Venting, and 3. Unbalanced Venting.
Be sure to locate the boiler such that the exhaust vent and
intake piping can be routed through the building and properly
terminated. Different vent terminals can be used to simplify and
eliminate multiple penetrations in the building structure (see
Optional Equipment in Venting Section). The exhaust vent and
intake piping lengths, routing, and termination methods must
all comply with the methods and limits given in the Venting
Section, this manual.
When installing a combustion air intake from outdoors, care
must be taken to utilize uncontaminated combustion air. To
prevent combustion air contamination, see Table 1.
WHL-052 Rev. 4.28.16
2. Power Venting, Indoor Combustion Air in Confined or
Unconfined Space
This boiler requires fresh, uncontaminated air for safe
operation and must be installed in a mechanical room where
there is adequate combustion and ventilating air. NOTE: To
prevent combustion air contamination, see Table 1.
Combustion air from the indoor space can be used if the space
has adequate area or when air is provided through a duct
or louver to supply sufficient combustion air based on the
boiler input. Never obstruct the supply of combustion air to
the boiler. If the boiler is installed in areas where indoor air
is contaminated (see Table 1) it is imperative that the boiler
be installed as direct vent so that all combustion air is taken
directly from the outdoors into the boiler intake connection.
Unconfined space is space with volume greater than 50
cubic feet per 1,000 BTU/hr (4.8 cubic meters per kW) of the
total input rating of all fuel-burning appliances installed in
that space. Rooms connected directly to this space through
openings not furnished with doors are considered part of the
space. See Venting Section for details.
Confined space is space with volume less than 50 cubic feet
per 1,000 BTU/hr (4.8 cubic meters per kW) of the total input
rating of all fuel-burning appliances installed in that space.
Rooms connected directly to this space through openings not
furnished with doors are considered part of the space.
When drawing combustion air from inside a conventionally
constructed building to a confined space, such space should
be provided with two permanent openings: one located 6"
(15 cm) below the space ceiling, the other 6" (15cm) above
the space floor. Each opening should have a free area of one
square inch per 1,000 BTU/hr (22cm
all appliances in the space, but not less than 100 square inches
(645cm
).
2
If the confined space is within a building of tight construction,
air for combustion must be obtained from the outdoors as
outlined in the Venting section of this manual.
When drawing combustion air from the outside into the
mechanical room, care must be taken to provide adequate
freeze protection.
Failure to provide an adequate supply of fresh combustion
air can cause poisonous flue gases to enter the living space,
resulting in severe personal injury or death. To prevent
combustion air contamination, see Table 1.
G. Prevent Combustion Air Contamination
Install intake air piping for the boiler as described in the
Venting Section, this manual. Do not terminate exhaust in
locations that can allow contamination of intake air.
Ensure that the intake air will not contain any of the
contaminants in Table 1. Contaminated air will damage the
boiler, resulting in possible substantial property damage,
severe personal injury, or death. For example, do not pipe
intake air near a swimming pool or laundry facilities. These
areas always contain contaminants.
/kW) of the total input of
2
Advertisement
Table of Contents
