Gas-fired
water boiler
Ve n t S u p p le m e n t
Ultra-80, -105, -155, -230 & -310
Installation of:
•Vent piping
• Air piping
with
This document must only be used by a qualified heating installer/service
technician. Read all instructions, including this Supplement and the Boiler
Manual, before installing. Perform steps in the order given. Failure to comply
could result in severe personal injury, death or substantial property damage.
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.
Part No.550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
1
Vent and air piping materials
Use only the materials listed in the table below for vent and air pipe and fittings. Failure to comply could
result in severe personal injury, death or substantial property damage.
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.
3
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
2
Prepare boiler location
Removing from existing vent
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.
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.
Vent and air piping
Vent and air system
When removing existing boiler from
existing common vent 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.
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.
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).
a. Seal any unused openings in the common venting
system.
You must also install air piping from outside to the
boiler air intake adapter. The resultant installation is
categorized as direct vent (sealed combustion).
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.
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.
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.
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.
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,
Combustion air for the Ultra boiler must be ducted
directly to the boiler from outside (direct vent
installation).
fireplace dampers, and any other gas-burning Follow all instructions in this document and the Ultra
appliance to their previous conditions of use. Boiler Manual to install vent and air piping.
4
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
2
Prepare boiler location
(continued)
Air contamination
Table 1 Corrosive contaminants
Pool and laundry products and common household
and hobby products often contain fluorine or chlorine
compounds. When these chemicals pass through the
boiler, they can form strong acids. The acid can eat
through the boiler wall, causing serious damage and
presenting a possible threat of flue gas spillage or boiler
water leakage into the building.
Please read the information given in Table 1, listing
contaminants and areas likely to contain them. If
contaminating chemicals will be present near the
location of the boiler combustion air inlet, have your
installer pipe the boiler combustion air and vent to
another location, per the Boiler Manual and Vent
Supplement.
If the boiler combustion air inlet is located in any area
likely to cause air contamination, or if products which
would contaminate the air cannot be removed, you
must have the combustion air and vent repiped and
terminated to another location. Contaminated
combustion air will damage the boiler heat exchanger,
resulting in possible severe personal injury, death or
substantial property damage.
Do not operate an Ultra boiler if the boiler combustion
air inlet is located in a laundry room or pool facility,
for example. These areas will always contain hazardous
contaminants.
To prevent the potential of severe personal injury or
death, check for areas and products listed in Table 1
before installing the boiler or air inlet piping.
If contaminants are found, you MUST:
• Remove products permanently. — OR —
• Relocate air inlet and vent terminations to other areas.
5
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
3
Vent/air termination — through roof
Follow instructions below when determining vent
Figure 1 Vertical termination of air & vent
location to avoid possibility of severe personal injury,
death or substantial property damage.
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.
Determine location
Locate the vent/air terminations using the following
guidelines:
1. The total length of piping for vent or air must not
exceed the limits given in Table 2, page 12.
2. The air piping must terminate in a down-turned 180-
degree return bend as shown in Figure 1. Locate the
air inlet pipe no further than 2 feet from the center of
the vent pipe. This placement avoids recirculation of
flue products into the combustion air stream.
3. The vent piping must terminate in an up-turned
coupling as shown in Figure 1. The top of the
coupling must be at least 1 foot above the air intake.
The air inlet pipe and vent pipe can be located in
any desired position on the roof, but must always
be no further than 2 feet apart and with the vent
termination at least 1 foot above the air intake.
4. You must consider the surroundings when
terminating the vent and air:
a. Position the vent termination where vapors will not
damage nearby shrubs, plants or air conditioning
equipment or be objectionable.
b. The flue products will form a noticeable plume as they
condense in cold air. Avoid areas where the plume
could obstruct window views.
a. Vent must terminate:
•
•
•
•
At least 6 feet from adjacent walls.
No closer than 5 feet below roof overhang.
At least 7 feet above any public walkway.
At least 3 feet above any forced air intake within
10 feet.
c. Prevailing winds could cause freezing of condensate
and water/ice buildup where flue products impinge
on building surfaces or plants.
•
No closer than 12 inches below or horizontally
from any door or window or any other gravity
air inlet.
d. Avoid possibility of accidental contact of flue products
with people or pets.
e. Do not locate the terminations where wind eddies
could affect performance or cause recirculation, such
as inside building corners, near adjacent buildings or
surfaces, window wells, stairwells, alcoves, courtyards
or other recessed areas.
b. Air inlet must terminate at least 6" above the roof or
snow line and at least 12" below the vent termination
as shown in Figure 1.
c. Do not terminate closer to 4 feet horizontally from
any electric meter, gas meter, regulator, relief valve or
other equipment. Never terminate above or below
any of these within 4 feet horizontally.
f. Do not terminate above any door or window.
Condensate can freeze, causing ice formations.
g. Locate or guard vent to prevent condensate damage
to exterior finishes.
6. Locate terminations so they are not likely to be
damaged by foreign objects, such as stones or balls,
or subject to buildup of leaves or sediment.
7. Do not connect any other appliance to the vent pipe
or multiple boilers to a common vent pipe.
5. Maintain clearances to vent termination as given
below:
6
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
3
Vent/air termination — through roof
(continued)
Prepare roof penetrations
Multiple vent/air terminations
1. Air pipe penetration:
1. When terminating multiple Ultra boilers, terminate
each vent/air connection as described in this
supplement.
a. Cut a hole for the air pipe. Size the air pipe hole as
close as desired to the air pipe outside diameter.
Terminate all vent pipes at the same height
and all air pipes at the same height to avoid
possibility of severe personal injury, death
or substantial property damage.
2. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either
combustible or noncombustible construction,
size the vent pipe hole at least 0.4" larger than
the vent pipe diameter:
• 4" hole for 3" PVC
• 5" hole for 4" PVC
b. Insert a galvanized metal thimble in the vent
pipe hole.
2. Place roof penetrations to obtain minimum clearance
of 12 inches between edge of air intake elbow and
adjacent vent pipe of another boiler for U. S.
installations (see Figure 2). For Canadian
installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code.
3. Space the air and vent holes to provide the minimum
spacings shown in Figure 1, page 6.
4. Follow all local codes for isolation of vent pipe
when passing through floors, ceilings and roofs.
3. The air inlet of an Ultra boiler is part of a direct
vent connection. It is not classified as a forced air
intake with regard to spacing from adjacent boiler
vents.
5. Provide flashing and sealing boots sized for the vent
pipe and air pipe.
Figure 2 Through roof terminations with
multiple boilers
Termination and fittings
1. Prepare the vent termination coupling and the air
termination elbow (Figure 1, page 6) by inserting the
bird screens provided with the boiler. Bird screens
are provided for either 3-inch (Ultra-80, -105 and -
155) or 4-inch (Ultra-230 and -310) fittings.
a. If using 3-inch piping for an Ultra-230, cut the 4-
inch bird screen supplied by placing 3-inch fitting
on screen and cutting around it as a template.
2. The air piping must terminate in a down-turned 180-
degree return bend as shown in Figure 1, page 6.
Locate the air inlet pipe no further than 2 feet from
the center of the vent pipe. This placement avoids
recirculation of flue products into the combustion
air stream.
3. The vent piping must terminate in an up-turned
coupling as shown in Figure 1, page 6. The top of the
coupling must be at least 1 foot above the air intake.
The air inlet pipe and vent pipe can be located in any
desired position on the roof, but must always be no
further than 2 feet apart and with the vent termination
at least 1 foot above the air intake.
4. Maintain the required dimensions of the finished
termination piping as shown in Figure 1, page 6.
5. Do not extend exposed vent pipe outside of building
more than shown in this document. Condensate
could freeze and block vent pipe.
7
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
4
Vent/air termination — sidewall
Follow instructions below when determining vent
location to avoid possibility of severe personal injury,
death or substantial property damage.
Figure 3 Sidewall termination of air & vent:
(Apply left illustration unless air termination ell
would not provide the minimum 12 inch
clearance to grade or snow line.
A gas vent extending through an exterior wall shall not
terminate adjacent to the wall or below building
extensions such as eaves, parapets, balconies or decks.
Failure to comply could result in severe personal injury,
death or substantial property damage.
Apply right illustration for other applications,
where exit openings are too low to provide the
minimum 12 inch clearance.)
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.
Determine location
Locate the vent/air terminations using the following
guidelines:
1. The total length of piping for vent or air must not
exceed the limits given in Table 2, page 12.
2. The air piping must terminate in a down-turned
elbow as shown in Figure 3. This arrangement
avoids recirculation of flue products into the
combustion air stream.
3. The vent piping must terminate in an elbow pointed
outward or away from the air inlet, as shown in
Figure 3.
Do not exceed the maximum lengths of
the outside vent piping shown in
Figure 3. Excessive length exposed to the
outside could cause freezing of
condensate in the vent pipe, resulting in
potential boiler shutdown.
f. Do not terminate above any door or window.
Condensate can freeze, causing ice formations.
g. Locate or guard vent to prevent condensate damage
to exterior finishes.
5. Maintain clearances as shown in Figures 3, 4, and 5,
pages 8, 9 and 10. Also maintain the following:
4. You must consider the surroundings when
terminating the vent and air:
a. Vent must terminate:
•
•
•
•
At least 6 feet from adjacent walls.
a. Position the vent termination where vapors will not
damage nearby shrubs, plants or air conditioning
equipment or be objectionable.
No closer than 5 feet below roof overhang.
At least 7 feet above any public walkway.
b. The flue products will form a noticeable plume as they
condense in cold air. Avoid areas where the plume
could obstruct window views.
At lease 3 feet above any forced air intake within
10 feet.
•
No closer than 12 inches below or horizontally
from any door or window or any other gravity
air inlet.
c. Prevailing winds could cause freezing of condensate
and water/ice buildup where flue products impinge
on building surfaces or plants.
b. Air inlet must terminate at least 12" above grade or
snow line; at least 12" below the vent termination;
and the vent pipe must not extend more than 24"
vertically outside the building as shown in Figure 3.
d. Avoid possibility of accidental contact of flue products
with people or pets.
e. Do not locate the terminations where wind eddies
could affect performance or cause recirculation, such
as inside building corners, near adjacent buildings or
surfaces, window wells, stairwells, alcoves, courtyards
or other recessed areas.
c. Do not terminate closer to 4 feet horizontally from
any electric meter, gas meter, regulator, relief valve
or other equipment. Never terminate above or below
any of these within 4 feet horizontally.
8
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
4
Vent/air termination — sidewall
(continued)
Determine location (continued)
Prepare wall penetrations
6. Locate terminations so they are not likely to be 1. Air pipe penetration:
damaged by foreign objects, such as stones or balls,
a. Cut a hole for the air pipe. Size the air pipe hole
or subject to buildup of leaves or sediment.
7. Do not connect any other appliance to the vent pipe
or multiple boilers to a common vent pipe.
as close as desired to the air pipe outside
diameter.
2. Vent pipe penetration:
a. Cut a hole for the vent pipe. For either
combustible or noncombustible construction,
size the vent pipe hole at least 0.4" larger than
the vent pipe diameter:
Figure 4 Clearance to gravity air inlets
• 4" hole for 3" PVC
• 5" hole for 4" PVC
b. Insert a galvanized metal thimble in the vent
pipe hole as shown in Figure 6.
3. Use a sidewall termination plate as a template for
correct location of hole centers.
4. Follow all local codes for isolation of vent pipe
when passing through floors or walls.
5. Seal exterior openings thoroughly with exterior
caulk.
Figure 6 Sidewall termination assembly
Figure 5 Clearance to forced air inlets
9
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
4
Vent/air termination — sidewall
(continued)
Termination and fittings
Figure 7 Multiple vent/air terminations (must
also comply with Figure 4)
1. Prepare the vent termination elbow and the air
termination elbow (Figure 6) by inserting the bird
screens provided with the boiler. Bird screens are
provided for either 3-inch (Ultra-80, -105 and -155)
or 4-inch (Ultra-230 and -310) fittings.
a. If using 3-inch piping for an Ultra-230, cut the 4-
inch bird screen supplied by placing 3-inch fitting
on screen and cutting around it as a template.
2. When completed, the air termination coupling must
be oriented at least 12 inches below the vent
termination and at least 12 inches above grade or
snow line as shown in Figure 3, page 8.
3. You can orient the vent termination elbow either
directly outward or 90 degrees away from the air
inlet elbow as shown in Figure 3, page 8.
4. Maintain the required dimensions of the finished
termination piping as shown in Figure 3, page 8.
5. Do not extend exposed vent pipe outside of building
more than shown in this document. Condensate
could freeze and block vent pipe.
Figure 8 Multiple vent/air terminations (must
also comply with Figure 4)
(Apply this method only where exit openings
are too low to provide minimum 12 inch
clearance above grade/snow line.)
Multiple vent/air terminations
1. When terminating multiple Ultra boilers, terminate
each vent/air connection as described in this
supplement.
All vent pipes and air inlets must
terminate at the same height to avoid
possibility of severe personal injury, death
or substantial property damage.
2. Place wall penetrations to obtain minimum
clearance of 12 inches between vent pipe and
adjacent air inlet elbow, as shown in Figure 7 or
Figure 8 for U. S. installations. For Canadian
installations, provide clearances required by CSA
B149.1 or B149.2 Installation Code.
3. The air inlet of an Ultra boiler is part of a direct
vent connection. It is not classified as a forced air
intake with regard to spacing from adjacent boiler
vents.
10
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
5
Installing vent & air piping
Installation must comply with local requirements and
Installing vent or air piping
with the National Fuel Gas Code, ANSI Z223.1 for U.S.
installations or CSA B149.1 or B149.2 for Canadian
installations.
For reference in following see:
•
•
Sidewall termination — Figure 9, page 12.
Through-roof termination — Figure 10, page 12.
1. Work from the boiler to vent or air termination. Do
not exceed the lengths given in Table 2 for either the
air or vent piping.
Inserting/securing vent or air
pipe into boiler adapters
1. Clean and chamfer insertion end of pipe. Deburr
inside of insertion end. Clean and deburr inside
and outside of other end of pipe.
a. Note that the Ultra-230 may be installed with either
3-inch or 4-inch vent and air piping. Table 2 provides
shorter allowable piping lengths when using 3-inch
piping.
2. Cut pipe to required lengths.
3. Deburr inside and outside of pipe ends.
sealing gasket in vent or air pipe adapter. 4. Chamfer outside of each pipe end to ensure even
The pipe end must be smooth and
chamfered to prevent possible damage to
Failure to comply could result in leakage,
causing possible severe personal injury or
death.
cement distribution when joining.
5. Clean all pipe ends and fittings. Dry thoroughly.
6. Dry assemble entire vent or air piping to ensure
proper fit before assembling any joint.
7. For each joint:
a. Handle fittings and pipes carefully to prevent
contamination of surfaces.
b. Apply primer liberally to both joint surfaces — pipe
end and fitting socket.
c. While primer is still damp, lightly apply approved
cement to both surfaces in a uniform coating.
d. Apply a second coat to both surfaces. Avoid using
too much cement on sockets to prevent cement
buildup inside.
2. Inspect vent or air adapter (above) — verify no
obstructions or foreign objects inside.
e. With cement still wet, insert pipe into fitting, twisting
¼ turn. Make sure pipe is fully inserted.
3. Loosen clamp screw.
4. Measure 3½ inches from end of pipe and make a
mark with felt-tip pen.
5. Loosen adapter clamp screw.
6. Apply small amount of silicon grease to end of pipe
to ease insertion.
f. Wipe excess cement from joint. Check joint to be sure
a smooth bead of cement shows around the entire
joint.
8. Install perforated metal pipe supports or equivalent
as shown in Figures 9 and 10, page 12.
9. Slope vent and air piping continuously toward boiler,
with at least ¼ inch drop per foot of run. Do not
allow sags at any point.
10. Maintain minimum clearance of 0.2 inch between
vent pipe and any combustible wall or material. Seal
wall or floor penetration openings following local
code requirements.
7. Insert pipe into adapter.
8. Slide pipe down until the 3½-inch mark is reached.
Do not apply excessive force or bend the
adapter or flue/air pipe when inserting.
The adapter or seal could be damaged.
9. Secure vent or air pipe by tightening the adapter
clamp securely. Do not overtighten. The seal is
accomplished with the internal gasket. The clamp 11. Use exhaust terminal plates on inside and outside
is only to hold the pipe in place. walls at sidewall terminations.
11
Part number 550-101-235/0903
GAS -FIRED WATER BOILER — Ve n t S u p p le m e n t
5
Installing vent & air piping
(continued)
Table 2
Min/max lengths of either air piping
or vent piping
Figure 10 Piping to through-roof terminations
Figure 9 Piping to sidewall terminations
When a large number of elbows is
needed with 3-inch piping, use long
radius elbows to reduce pressure drop.
This allows a longer run of piping. See
Table 2 notes for details.
Do not insulate vent piping. Exception: Where vent pipes pass through unheated spaces, such as
crawl spaces or unheated garages, apply ½ inch fiberglass insulation to the portion of the vent pipe
in the unheated space only.
12
Part number 550-101-235/0903
|