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GAS-FIRED WATER BOILER — Boiler Manual
Part number 550-101-233/0903
7
Prepare boiler location
(continued)
1
Flooring and foundation
Flooring
The Ultra boiler is approved for installation on
combustible flooring, but must never be installed on
carpeting.
Do not install boiler on carpeting even if
foundation is used. Fire can result, causing
severe personal injury, death or substantial
property damage.
Foundation
Provide a solid foundation pad, at least 2 inches above
the floor, if any of the following is true:
• floor can become flooded.
• the floor is dirt, sand, gravel or other loose material.
• the boiler mounting area is severely uneven or sloped.
The minimum foundation size is:
• Ultra-80 to -230: 24 inches wide x 20 inches deep.
• Ultra-310: 24 inches wide x 23 inches deep
24 inches x 20 inches.Foundation may be of wood, brick
or concrete (minimum 2 inches thick) construction.
If flooding is possible, elevate boiler sufficiently to prevent
water from reaching boiler.
Residential garage installation
Precautions
Take the following special precautions when installing
the boiler in a residential garage. If the boiler is located in
a residential garage, per ANSI Z223.1, paragraph 5.1.9:
• Mount the boiler with a minimum of 18 inches above
the floor of the garage to the bottom of the boiler to
ensure the burner and ignition devices will be no less
than 18 inches above the floor.
• Locate or protect the boiler so it cannot be damaged
by a moving vehicle.
Provide air openings to room:
Ultra boiler alone in boiler room
1. No air ventilation openings into boiler room are
needed when clearances around Ultra boiler are at
least equal to the SERVICE clearances shown in
Figure 1. For spaces that do NOT supply this
clearance, provide two openings as shown in Figure 1.
Each opening must provide 1 square inch free area
per 1,000 Btuh of boiler input.
Vent and air piping
The Ultra boiler requires a special vent system, designed
for pressurized venting. Ultra boilers are rated ANSI
Z21.13 Category IV (pressurized vent, likely to condense
in the vent).
You must also install air piping from outside to the boiler
air intake adapter. The resultant installation is categorized
as direct vent (sealed combustion). Note prevention of
combustion air contamination on page 8 when
considering vent/air termination.
Vent and air must terminate near one another and may
be vented vertically through the roof or out a side wall.
You may use any of the vent/air piping methods covered
in the Ultra Boiler Vent Supplement, included in the
envelope assembly. Do not attempt to install the Ultra
boiler using any other means.
Be sure to locate the boiler such that the vent and air
piping can be routed through the building and properly
terminated. The vent/air piping lengths, routing and
Ultra boiler in same space with other gas or
oil-fired appliances
1. Follow the National Fuel Gas Code (U. S.) or CSA
B149.1 and B149.2 (Canada) to size/verify size of the
combustion/ventilation air openings into the space.
The space must be provided with
combustion/ventilation air openings
correctly sized for all other appliances
located in the same space as the Ultra boiler.
Replace boiler jacket front door after
servicing. The boiler front door must be
securely fastened to the boiler to prevent
boiler from drawing air from inside the
boiler room. This is particularly important
if the boiler is located in the same room as
other appliances.
Failure to comply with the above warnings
could result in severe personal injury, death
or substantial property damage.
2. Size openings only on the basis of the other appliances
in the space. No additional air opening free area is
needed for the Ultra boiler because it takes its
combustion air from outside (direct vent installation).