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Part number 550-101-235/0903
4
GAS-FIRED WATER BOILER — Vent Supplement
Prepare boiler location
Vent and air piping
Vent and air system
Installation must comply with local
requirements and with the National Fuel
Gas Code, ANSI Z223.1 for U.S.
installations or CSA B149.1 or B149.2 for
Canadian installations.
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).
You may use any of the vent/air piping methods
covered in this supplement. Do not attempt to install
the Ultra boiler using any other means.
DO NOT mix components from
different systems. The vent system could
fail, causing leakage of flue products into
the living space. Use only PVC, CPVC or
ABS pipe and fittings, with primer and
cement specifically designed for the
material used.
Vent and air piping and termination
The Ultra boiler vent and air piping can be installed
through the roof or through a side wall. Follow the
procedures in this document for the method chosen.
The maximum vent length depends on boiler size. Refer
to the information in this supplement to determine
acceptable vent and air piping length.
Combustion air for the Ultra boiler must be ducted
directly to the boiler from outside (direct vent
installation).
Follow all instructions in this document and the Ultra
Boiler Manual to install vent and air piping.
Do not install the Ultra into a common
vent with any other appliance. This will
cause flue gas spillage or appliance
malfunction, resulting in possible severe
personal injury, death or substantial
property damage.
Failure to follow all instructions can
result in flue gas spillage and carbon
monoxide emissions, causing severe
personal injury or death.
2
Removing from existing vent
When removing existing boiler from
existing common vent system:
At the time of removal of an existing boiler, the
following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances
remaining connected to the common venting system
are not in operation.
a. Seal any unused openings in the common venting
system.
b. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion or other
deficiencies which could cause an unsafe condition.
c. Test vent system — Insofar as is practical, close all
building doors and windows and all doors between
the space in which the appliances remaining
connected to the common venting system are
located and other spaces of the building. Turn on
clothes dryers and any appliance not connected to
the common venting system. Turn on any exhaust
fans, such as range hoods and bathroom exhausts,
so they will operate at maximum speed. Do not
operate a summer exhaust fan. Close fireplace
dampers.
d. Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat
so appliance will operate continuously.
e. Test for spillage at draft hood relief opening after 5
minutes of main burner operation. Use the flame
of a match or candle, or smoke from a cigarette,
cigar, or pipe.
f. After it has been determined that each appliance
remaining connected to the common venting
system properly vents when tested as outlined
herein, return doors, windows, exhaust fans,
fireplace dampers, and any other gas-burning
appliance to their previous conditions of use.
Any improper operation of common venting system
should be corrected so the installation conforms with
the National Fuel Gas Code, ANSI Z223.1 — latest
edition. Correct by resizing to approach the minimum
size as determined using the appropriate tables in
Part 11 of that code. Canadian installations must
comply with B149.1 or B149.2 Installation Code.