TriangleTube The Modulating delta User manual

WARNING
2006-11 Modulating Delta Vent Supl.
This document is intended to be used by a qualified heating contractor or service
technician. Read all instructions within this document and within the MODULAT-
ING DELTA Installation and Maintenance Manual, before proceeding with the
installation. It is recommended to follow the procedures in the steps given, skip-
ping or missing procedural steps could result in severe personal injury,death or
substantial property damage.
Installation of this appliance must comply with local requirements and codes and
with the National Fuel Gas Code NFPA54, ANSI Z223.1 for installations within the
U.S. For installations in Canada the installation must comply with CSA B149.1 or
B149.2
NOTICE
The
Modulating
Modulating
Date: 4/27/06

Table of Contents
i
PRODUCT AND SAFETY INFORMATION
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installer Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Homeowner Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
SECTION I - PRE-INSTALLATION REQUIREMENTS
Removal of an Existing Appliance from a Common Vent System. . . . . . . . . . . . . 2
Combustion Air Contamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ventilation and Combustion Air Requirements - Direct Vent . . . . . . . . . . . . . . . . . 4
Ventilation and Combustion Air Requirements - Category I, III and IV . . . . . . . . . 4
Methods of Accessing Combustion Air into a Space - Category I, III, IV
-Indoor Combustion Air .......................................5
-Outdoor Combustion Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
-Combination of Indoor and Outdoor Combustion Air . . . . . . . . . . . . . . . 7
Vent/Combustion Air Piping and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Vent Piping Materials - Category I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Vent Piping Materials - Category III, IV and Direct Vent. . . . . . . . . . . . . . . . . . . . . 8
Combustion Air Piping Materials - Direct Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SECTION II - DIRECT VENT - INSTALLATION OF VENT/AIR PIPING
Direct Vent - Vertical - Thru the Roof or Unused Chimney...................9-10
Determine Termination Location .......................................11
Direct Vent - Vent Installation - Thru the Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-12
Termination Fittings - Vertical Two Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Direct Vent - Multiple Installation - Thru the Roof. . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
Direct Vent - Horizontal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-18
Determine Termination Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Direct Vent - Vent Installation - Horizontal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Termination Fitting - Direct Vent Horizontal Two Pipe . . . . . . . . . . . . . . . . . . . . . . 20
Termination Fittings - Direct Vent Horizontal Wall Thimble. . . . . . . . . . . . . . . . . . . 20
Direct Vent - Multiple Installation - Horizontal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Combustion Air Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Vent Condensate Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Condensate Drain Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Vent Appliance Adapters - Direct Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Vent and Combustion Air Piping Installation Guidelines. . . . . . . . . . . . . . . . . . . . . 22

Table of Contents
ii
SECTION III - CATEGORY III or IV - INSTALLATION OF VENT/AIR PIPING
Category III or IV - Vertical - Thru the Roof or Unused Chimney. . . . . . . . . . . . . . 23
Determine Termination Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-24
Category III or IV - Vent Installation - Thru the Roof . . . . . . . . . . . . . . . . . . . . . . . 24
Termination Fittings - Thru the Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Category III or IV - Multiple Installation - Thru the Roof . . . . . . . . . . . . . . . . . . . . . 25
Category III or IV - Horizontal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-26
Determine Termination Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Category III or IV - Vent Installation - Sidewall. . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Termination Fittings - Horizontal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Category III or IV - Multiple Installation - Sidewall . . . . . . . . . . . . . . . . . . . . . . . . . 28
Combustion Air Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Vent Appliance Adapters - Category III or IV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Vent Condensate Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Condensate Drain Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Vent and Combustion Air Piping Installation Guidelines. . . . . . . . . . . . . . . . . . . . . 29-30
SECTION IV - CATEGORY I - INSTALLATION
General Requirements - Category I ....................................31
Masonry and Metal Chimneys ........................................31
Type B Vent Systems ...............................................31
Vent Connectors ...................................................31-32
Common Venting - Category I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
SECTION V - COMMONWEALTH OF MASSACHUSETTS
Installation with Sidewall Vent
Termination Elevation at or Below Four Feet of Grade . . . . . . . . . . . . . . . . 33
Installation with Sidewall Vent
Termination Elevation Above Four Feet of Grade. . . . . . . . . . . . . . . . . . . . . 34

Product and Safety Information
INSTALLER
Read all instructions as outlined in this manual
and in the appliance installation manual. Failure to
comply with these instructions in the order pre-
sented could result in personal injury or death.
This document is a supplement to the MODULATING
DELTA installation and maintenance manual. The pur-
pose of this supplement is for the proper ventilation and
installation of the vent and combustion air piping to the
appliance.
All MODULATING DELTA vent and combustion air
piping must be installed, terminated and joints
sealed as outlined in this manual. Failure to com-
ply with installation procedures outlined in this
manual can result in severe personal injury, death
or substantial property damage.
If concentric vent/air installation is required an
optional kit is available through Triangle Tube.
HOMEOWNER
• This manual is intended for use by a qualified heat-
ing contractor or service technician.
•Please reference the User Information manual for
additional information.
• Ensure this document and all pertaining documents
are maintained near the appliance to be used by the
qualified heating contractor or service technician.
NOTICE
WARNING
WARNING
1
The following terms are used throughout this manual to
bring attention to the presence of potential hazards or to
important information concerning the product.
Indicates the presence of a hazardous situation
which, if ignored, will result in death, serious injury
or substantial property damage.
Indicates a potentially hazardous situation which, if
ignored, can result in death, serious injury or sub-
stantial property damage.
Indicates a potentially hazardous situation which, if
ignored, may result in minor injury or substantial
property damage.
Indicates special instructions on installation, opera-
tion or maintenance, which are important to the
equipment but not related to personal injury hazards.
Indicates recommendations made by Triangle Tube
for the installers which will help to ensure optimum
operation and longevity of the equipment.
BEST PRACTICES
NOTICE
CAUTION
WARNING
DANGER
DEFINITIONS

2
Pre-Installation Items
SECTION I - PRE- INSTALLATION ITEMS
Removal of an Existing Appliance from a Common
Vent System
A MODULATING DELTA when vented as a
Category I appliance (PG-150 & PG-199 ONLY)
may be vented into a common vent system. Do
not install a MODULATING DELTA when vented
as a Direct Vent or Category III or IV appliance
into a common vent with any other gas appliance.
This will cause gas spillage or appliance mal-
function, resulting in possible severe personal
injury, death or substantial property damage.
When an existing appliance is removed from a common
venting system, the common venting system is likely to
be too large for proper venting of the remaining appli-
ances. At the time of removal of an existing appliance,
the following steps shall be followed with each appliance
remaining connected to the common venting system
placed in operation, while the other appliances remain-
ing connected to the common venting system are not in
operation.
1. Seal any unused openings in the common venting
system.
2. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no
blockage or restriction, leakage, corrosion and other
deficiencies which could cause an unsafe condition.
3. 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 maxi-
DANGER
mum speed. Do not operate a summer exhaust fan.
Close fireplace dampers.
4. Place in operation the appliance being inspected.
Follow the lighting instructions. Adjust thermostat so
appliance will operate continuously.
5. Test for spillage at the draft hood relief opening after
5minutes of main burner operation. Use the flame
of a match or candle, or smoke from a cigarette,
cigar or pipe.
6. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above,
return doors, windows, exhaust fans, fireplace
dampers and any other gas-burning appliance to
their previous condition of use.
7. Any improper operation of the common venting sys-
tem should be corrected so the installation conforms
with the National Fuel Gas Code, ANSI
Z223.1/NFPA 54 and/or CAN/CGA B149,
Installation Codes. When resizing any portion of the
common venting system, the common venting sys-
tem should be resized to approach the minimum
size as determined using the appropriate tables in
Part 11 of the National Fuel Gas Code, ANSI
Z223.1/NFPA54 and/or CAN/CGA B149,
Installation Codes.
A MODULATING DELTA when vented as a
Category I appliance (PG-150 & PG-199 ONLY)
may be vented into a common vent system. Do
not install a MODULATING DELTA when vented as
aDirect Vent or Category III or IV appliance into a
common vent with any other gas appliance. This
will cause gas spillage or appliance malfunction,
resulting in possible severe personal injury,
death or substantial property damage.
DANGER

Pre-Installation Items
3
Combustion Air Contamination
Ifthe MODULATING DELTA combustion air inlet
is located in any area likely to cause or contain
contamination, or if products, which would con-
taminate the air cannot be removed, the com-
bustion air must be repiped and terminated to
another location. Contaminated combustion air
will damage the appliance and its burner system,
resulting in possible severe personal injury,
death or substantial property damage.
Do not operate a MODULATING DELTA if its com-
bustion air inlet is located near a laundry room
or pool facility.These areas will always contain
hazardous contaminants.
Pool and laundry products and common house-
hold and hobby products often contain fluorine or
chlorine compounds. When these chemicals pass
through the burner and vent system, they can form
strong acids. These acids can create corrosion of
the heat exchanger, burner components and vent
system, causing serious damage and presenting a
possible threat of flue gas spillage or water leakage
into the surrounding area.
If contaminating chemicals are located near the
area of the combustion air inlet, the installer
should pipe the combustion air inlet to an out-
side area free of these chemicals.
DANGER
WARNING
Potential contaminating products
- Spray cans containing chloro/fluorocarbons
- Permanent Wave Solutions
- Chlorinated wax
- Chlorine - based swimming pool chemicals /
cleaners
- Calcium Chloride used for thawing ice
- Sodium Chloride used for water softening
- Refrigerant leaks
- Paint or varnish removers
- Hydrochloric acid / muriatic acid
-Cements and glues
- Antistatic fabric softeners used in clothe dryers
-Chlorine-type bleaches, detergents, and clean-
ing solvents found in household laundry rooms
- Adhesives used to fasten building products and
other similar products
Areas likely to contain these products
-Dry cleaning / laundry areas and establishments
- Beauty salons
- Metal fabrication shops
- Swimming pools and health spas
- Refrigeration Repair shops
-Photo processing plants
- Auto body shops
-Plastic manufacturing plants
- Furniture refinishing areas and establishments
- New building construction
- Remodeling areas
-Garages with workshops

4
Pre-Installation Items
Ventilation and Combustion Air Requirements -
Direct Vent
A Direct Vent appliance utilizes uncontamined outdoor
air (piped directly to the appliance) for combustion.
For Direct Vent installations involving only the MODU-
LATING DELTA, the space / enclosure must provide two
openings for ventilation. The openings must be sized to
provide 1 square inch of free area per 1,000 BTUH of
appliance input. The openings shall be placed 12 inch-
es from the top of the space and 12 inches from the floor
of the space.
For installations in which the MODULATING DELTA
shares the space with air movers (exhaust fan, clothes
dryers, fireplaces, etc.) and other combustion equip-
ment (gas or oil) the space must be provided with ade-
quate air openings to provide ventilation and combus-
tion air to the equipment. To properly size the ventilation
/combustion air openings, the installer must comply
with the National Fuel Gas Code NFPA 54, ANSI Z223.1
for installations in the U.S or CSA B149.1 and B149.2 for
installations in Canada.
The space must be provided with ventilation /
combustion air openings properly sized for all
make-up air requirements (exhaust fans, clothes
dryers, fireplaces, etc.) and the total input of all
appliances located in the same space as the
MODULATING DELTA, excluding the input of a
Direct Vent MODULATING DELTA which uses
combustion air directly from the outside, thus
additional free area for the openings is not
required. Failure to provide or properly size the
openings could result in severe personal injury,
death or substantial property damage.
WARNING
Ventilation and Combustion Air Requirements -
Category I, III and IV
A Category I, III and IV appliance utilizes uncontaminat-
ed indoor or outdoor air (surrounding the appliance) for
combustion.
In order to reduce the potential risks associated
with indoor contaminates (listed on page 3),
flammable vapors and tight housing construc-
tion (little or no infiltration air), it is recommend-
ed to pipe uncontaminated combustion air
directly from the outdoors to the appliance. This
practice also promotes higher system efficiency
by reducing heated indoor air from being
exhausted from the house and replaced by cold
infiltration air into the house.
For installations in which the MODULATING DELTA
shares the space with air movers (exhaust fan, clothes
dryers, fireplaces, etc.) and other combustion equipment
(gas or oil) the space must be provided with adequate
air openings to provide ventilation and combustion air to
the equipment. Toproperly size the ventilation / com-
bustion air openings, the installer must comply with the
National Fuel Gas Code NFPA 54, ANSI Z223.1 for
installations in the U.S or CSA B149.1 and B149.2 for
installations in Canada, as referenced in this section of
the manual and title Methods of Accessing Combustion
Air into a Space.
The space must be provided with ventilation /
combustion air openings properly sized for all
make-up air requirements (exhaust fans, clothes
dryers, fireplaces, etc.) and the total input of all
appliances located in the same space as the MOD-
ULATING DELTA. Failure to provide or properly
size the openings could result in severe personal
injury, death or substantial property damage.
WARNING
BEST PRACTICES

Pre-Installation Items
5
Methods of Accessing Combustion Air Into A Space
-Category I, III and IV
Indoor Combustion Air
The methods listed in this section for accessing
Indoor Combustion Air assume that the infiltra-
tion rate is adequate and not less than .40 ACH.
For infiltration rates less than .40 ACH, reference
the NFPA 54 National Fuel Gas Code for addi-
tional guidance.
Opening Size and Location
Openings used to connect indoor spaces shall be sized
and located in accordance with the following see Fig. 1:
-Combining spaces on the same story. Each
opening shall have a minimum free area of 1 sq.
in./1000 Btu/hr of the total input rating of all gas
utilization equipment in the space, but not less
than 100 sq. inches. One opening shall com-
mence within 12 inches of the top, and one open-
ing shall commence within 12 inches of the bot-
tom of the enclosure. The minimum dimension of
air openings shall be not less than 3 inches.
NOTICE
-Combining spaces in different stories. The vol-
umes of spaces in different stories shall be con-
sidered as communicating spaces where such
spaces are connected by one or more openings
in doors or floors having a total minimum free
area of 2 sq. in./1000 Btu/hr of total input rating
of all gas utilization equipment.
Outdoor Combustion Air
Isolating the combustion appliance room from
the rest of the building and bringing in unconta-
minated outside air for combustion and ventila-
tion is always preferred.
Opening Size and Location
The minimum dimension of air openings shall be not
less than 3 inches
Openings used to supply combustion and ventilation air
shall be sized and located in accordance with the fol-
lowing:
One Permanent Opening Method
One permanent opening, commencing within 12 in. of
the top of the enclosure, shall be provided. See Fig. 2.
The equipment shall have clearances of at least 1 inch
from the sides and 6 in. from the front of the appliance.
The opening shall directly communicate with the out-
doors or shall communicate through a vertical or hori-
zontal duct to the outdoors or spaces that freely com-
municate with the outdoors and shall have a minimum
free area of the following:
- 1sq. in./3000 Btu/hr of the total input rating of all
equipment located in the enclosures, and
- Not less than the sum of the areas of all vent
connectors in the space.
BEST PRACTICES
All Combustion Air from Adjacent
Indoor Spaces through Indoor
Combustion Openings
Fig. 1:

Pre-Installation Items
6
All Combustion Air from outdoors
through; One Permanent Air Openings
Fig. 2: All Combustion Air from Outdoors
Through Ventilated Attic
Fig. 3:
All Combustion Air from Outdoors
through Horizontal Ducts
Fig. 4:
Two Permanent Openings Method.
Two permanent openings, one commencing within 12 in.
of the top and one commencing within 12 in. of the bot-
tom of the enclosure, shall be provided. The openings
shall communicate directly, or by ducts, with the out-
doors or spaces that freely communicate with the out-
doors, as follows:
-Where directly communicating with the outdoors
or where communication to the outdoors is
through vertical ducts, each opening shall have
aminimum free area of 1 sq. in./4000 Btu/hr of
total input rating of all equipment in the enclo-
sure. See Fig.3.
- Where communicating with the outdoors is
through horizontal ducts, each opening shall
have a minimum free area of not less than 1
sq.in./2000 Btu/hr of total input rating of all
equipment in the enclosure. See Fig. 4.

Pre-Installation Items
7
Combination of Indoor and Outdoor Combustion Air
Indoor Openings: Where used, openings connecting the
interior spaces shall comply with the Indoor Combustion
Air section on page 5.
Outdoor Opening(s) Location. Outdoor opening(s) shall
be located in accordance with the Outdoor Combustion
Air section.
Outdoor Opening(s) Size. Outdoor opening(s) shall be
calculated in accordance with the following:
-The ratio of the interior spaces shall be the avail-
able volume of all communicating spaces divid-
ed by the required volume.
-The outdoor size reduction factor shall be 1
minus the ratio of interior spaces.
-The minimum size of outdoor opening(s) calcu-
lated in accordance with the above outdoor air
section multiplied by the reduction factor.The
minimum dimension of air openings shall not be
less than 3 in.
Vent/Combustion Air Piping and Materials
Installation of the vent and combustion air pip-
ing must comply with local codes and require-
ments and with the National Fuel Gas Code
NFPA 54, ANSI Z223.1 and/or Standard for
Chimneys, Vent and Solid Fuel Burning
Appliances, NFPA211 for installations in the U.S.
or with CSA B149.1 or B149.2 for installations in
Canada.
NOTICE
The MODULATING DELTA is certified per ANSI
Z21.10.3 and CSA 4.3 as a Category I or III or IV (indoor
air) or Direct Vent (sealed combustion) appliance. A
Category I, III and IV appliance utilizes uncontaminated
indoor or outdoor air (surrounding the appliance) for
combustion. A Direct Vent appliance utilizes uncontami-
nated outdoor air (piped directly to the appliance) for
combustion. See Table 1 for a breakdown of model num-
bers and venting options.
In order to reduce the potential risks associated
with indoor contaminates (listed on page 3),
flammable vapors and tight housing construc-
tion (little or no infiltration air), it is recommend-
ed to pipe uncontaminated combustion air
directly from the outdoors to the appliance. This
practice also promotes higher system efficiency
by reducing heated indoor air from being
exhausted from the house and replaced by cold
infiltration air into the house.
BEST PRACTICE
Model Venting
Number Options
Category I or III
or
Direct Vent
Category IV
or
Direct Vent
PG PLUS-150
PG PLUS-199
PG-150
PG-199
Table 1: Venting Options

Direct Vent Installation of Vent/Air Piping
8
Vent Piping Materials - Category I
The vent materials must meet the listed require-
ments in this manual. Failure to comply with these
material requirements could result in severe person-
al injury, death or substantial property damage.
Piping and Fittings
- B-Vent
- Approved Metal Chimney Lining System
- Other approved Gas Vent Systems Per NFPA 54
and/or NFPA 211 or CSA B149 for Canada.
DO NOT mix vent components from different vent
systems. Ensure all piping and fittings, joints are
sealed and secured. Failure to comply with these
requirements could cause vent failure resulting in
leakage of flue products into the living space sur-
rounding the appliance.
Vent Piping Materials - Category III, IV and Direct
Vent
The vent materials must meet the listed require-
ments in this manual. Failure to comply with these
material requirements could result in severe person-
al injury, death or substantial property damage.
3” Diameter AL29-4C®Piping and Fittings
The following is a list of approved vent manufactures
and vent systems:
- Heat-Fab (Saf-T-Vent®)
- ProTech Systems (Fas NSeal®)
- Flex-L (Star-34)
-Z-Flex (Z-Vent III™)
- Metal-Fab, Inc (Corr Guard)
WARNING
WARNING
WARNING
Combustion Air Piping and Materials -Direct Vent
The combustion air materials must meet the listed
requirements in this manual. Failure to comply with
these material requirements could result in severe
personal injury, death or substantial property dam-
age.
3” Diameter Combustion Air Piping and Fittings
- PVC Schedule 40 - ANSI/ASTM D1785
- PVC-DWV - ANSI/ASTM D2665
- CPVC Schedule 40 - ANSI/ASTM F441
- ABS-DWV Schedule 40 - ANSI/ASTM D2661
- Galvanized Metal Vent
- Flexible Metal Vent
Pipe Cement and Primer
- PVC - ANSI/ASTM D2564
- CPVC - ANSI/ASTM F493
- ABS - ANSI/ASTM D2235
For installations in Canada, all piping, fittings and
cement/primer material must comply with CSA or
ULC certification.
DO NOT mix components from different systems.
Seal all piping and fittings.
NOTICE
NOTICE
WARNING

Direct Vent Installation of Vent/Air Piping
9
SECTION II - DIRECT VENT INSTALLATION
OF VENT/AIR PIPING
ADirect Vent appliance utilizes uncontaminated outdoor
air (piped directly to the appliance) for combustion.
Direct Vent - Vertical - Thru the Roof or An Unused
Chimney
Installation of the vent and combustion air pip-
ing must comply with local codes and require-
ments and with the National Fuel Gas Code
NFPA 54, ANSI Z223.1 for installations in the U.S.
or CSA B149.1 or B149.2 for installations in
Canada.
When using an unused chimney as a means of a
raceway for the vent, the surrounding space
within the chimney cannot be used to draw com-
bustion air or vent another appliance.
Agas vent extending through a roof should not
terminate near an adjacent wall or below any
building extensions such as roof eaves, bal-
conies or decks. Failure to comply with the
required clearances could result in severe per-
sonal injury, death or substantial property dam-
age.
The installer has two options when direct venting verti-
cally,Concentric or Two Pipe. Both vent options are
shown in Figs. 5 & 6 and are available in accessory kits
through Triangle Tube. See Fig. 6 page 10 for Two Pipe
installation details or the MODULATING DELTA
Concentric Vent Installation Manual for additional
Concentric details.
WARNING
NOTICE
NOTICE
Fire Stop/Support
Tall Cone
Flashing
5" Storm
Collar
Vertical
Termination
Adapter
Rain Cap
Hose
Clamps
Flexible
Air Hose
Combustion
Air Inlet
Spring
Clip
Flue
Outlet
Condensate
Drain Hose
3" Diameter
Trap Loop
Cable
Ties
To Drain According
to Local Codes
000
Direct Vent - Vertical Concentric. See
MODULATING DELTAConcentric Vent
Installation Manual for Installation Details
Fig. 5:

10
Direct Vent Installation of Vent/Air Piping
Refer to Vent
Manufacturer's
Recommended
Clearances
Refer to Vent Manufacturer's
Recommended Clearances
000
To Drain
According to
Local Codes
Condensate
Drain
with Trap Loop
Storm
Collar
Rain Cap
12” Min. & 24” Max.
Radial Distance
12” Above Roof of
Projected Snow Line
12” Min. - 24” Max.
Above Combustion
Air Inlet
Elbow
with Bird
Screen
Adjustable
Flashing
Adjustable
Flashing
Roof Jack
Firestops
Support
Clamps
Combustion
Air Inlet
2 Ft. Max.
to Condensate
Drain
Direct Vent - Vertical Two Pipe
Fig. 6:

11
Direct Vent Installation of Vent/Air Piping
f.Locate or guard the vent termination to prevent
possible condensate damage to exterior finishes.
g. Avoid locations of possible accidental contact of
flue vapors with persons or pets.
6. The vent termination must also maintain the follow-
ing clearances; as shown in Fig.13, page 21.
a. At least 6 feet from adjacent walls
b. No closer than 5 feet below roof over hangs
c. At least 7 feet above any public walkways
d. At least 3 feet above any forced air intake with-
in 10 feet (does not apply to the combustion air
inlet of a direct vent appliance).
e. No closer than 12 inches below or horizontally
from any door or window or gravity air inlet.
f. Must be at least 4 feet from any electric meters,
gas meters-regulators, relief valves or other
equipment. Never terminate the vent above or
below any of these items within 4 feet horizon-
tally.
7. Locate the vent termination and combustion air inlet
in a matter to protect from damage by foreign
objects, such as stones or balls or subject to buildup
of leaves or sediment.
8. Do not connect any other appliance to the vent pipe
or multiple appliances to a common vent pipe.
9. The vent system must contain a condensate trap
located no higher than 2 feet above the appliance.
As shown in Fig. 6 page 10.
Direct Vent - Vent Installation - Thru the Roof
1. Vent and Combustion Air Penetration
- Vent pipe penetration maintain vent manufactur-
er’s required clearances to combustibles & non-
combustibles. Refer to vent manufacture’s
installation instructions for details
- Combustion air pipe penetration can maintain
zero clearance.
2. The installer must use a galvanized metal thimble for
the vent pipe penetration.
3. Locate the vent and combustion air pipe penetra-
tions to provide minimum clearances as described in
Fig. 6 page 10.
4. The installer must comply with all local codes for iso-
lating the vent pipe as it passes through floors, ceil-
ings and roofs.
Determine Termination Location
Locate the vent and combustion air termination using the
following guidelines:
1. The total length of the vent or combustion air piping
must not exceed the limits given in Table 2 on page
22.
Do not include the two 90ºelbows or rain cap
used to terminate the combustion air inlet or
vent when determining the total length of pipe.
2. The combustion air piping must terminate in an
upside down “U” shape fashion using two 90º
elbows and must be installed 12 inches above the
roof or projected snowline, as shown in Fig. 6 page
10.
3. The vent must terminate vertically with a rain cap and
must be located 12 to 24 inches above the combustion
air inlet as shown in Fig. 6 page 10.
4. The combustion air inlet and vent terminations must
be located a radial distance of 12 to 24 inches from
centerline as shown in Fig. 6 page 10.
5. The following should be considered when deter-
mining the location of the vent and combustion air
termination:
a. Locate the vent termination where flue vapors
will not damage surrounding shrubs, plants or
air conditioning equipment or be objectionable
to the homeowner.
b. The flue products will form a noticeable plume
as they condense in colder air. Avoid terminat-
ing the vent in areas where the plume could
obstruct window views.
c. Prevailing winds could cause freezing of flue
condensation and a buildup of water / ice on sur-
rounding plants, building surfaces or combus-
tion air inlet.
d. Avoid locations where prevailing winds could
affect the performance of the appliance or cause
recirculation of the flue gases, such as inside
corners of buildings or near adjacent buildings
or vertical surfaces, window wells, stairwells,
alcoves, courtyards, or other recessed areas.
e. Do not terminate the vent above any doors or
windows: flue condensate could freeze causing
ice formations.
NOTICE

Direct Vent Installation of Vent/Air Piping
12
Direct Vent - Multiple Installation - Thru the Roof
1. On installations of multiple MODULATING DELTAS,
terminate each vent and combustion air piping as
described in this manual.
2. The roof penetration of the vent and combustion air
piping should be such that the vent and combustion
air terminations are a minimum 18 inches from the
adjacent vent pipe of the other appliance for instal-
lations in the U.S. as shown in Fig. 8. For installa-
tions in Canada, provide clearances as required by
CSA B149.1 or 149.2.
The combustion air inlet of the MODULATING
DELTA is defined as being part of a direct vent
system. It is not considered as a forced air
intake. The required clearance of an adjacent
appliance vent to a forced air inlet does not
apply in a multiple installation of MODULATING
DELTAS.
NOTICE
12"Min.-24"
12" above
roof or projected
snow line
12" Min. - 24" Max
18"Min.
RadialDistance
Above Combustion Air Inlet
Rain Cap
Vent Termination
Combustion
Air Inlet
Termination
Any portion of the building
or roof.
10Ft.Min.
Direct Vent - Multiple Thru The Roof
Termination
Fig. 8:
5. The installer should provide adequate flashing and
sealing boots sized for the vent pipe and combustion
air pipe.
Termination Fittings - Vertical Two Pipe
1. The combustion air pipe termination must include a fac-
tory supplied “bird screen” as shown in Fig. 7 The bird
screen should be inserted inside the termination.
2. The combustion air piping must terminate in an
upside down “U” shape fashion using two 90º
elbows as shown in Figs. 6 & 7.
3. The vent piping must terminate vertically with a rain
cap as shown in Fig. 6 page 10.
Do not extend the vent pipe outside the roof
beyond the given dimensions shown in Fig. 6,
page 10. Extended exposure of the vent pipe
could cause condensate to freeze and block the
vent pipe.
WARNING
Bird Screen*
Combustion Air
Inlet Termination
Elbows
*Installer must install the factory supplied “bird
screens” on the combustion air inlet termination.
Direct Vent - Vertical Two Pipe / Combustion
Air Fitting
Fig. 7:

13
Installation of the vent and combustion air pip-
ing must comply with local codes and require-
ments and with the National Fuel Gas Code
NFPA 54, ANSI Z223.1 for installations in the U.S.
or CSA B149.1 or B149.2 for installations in
Canada.
For direct vent installations in the
Commonwealth of Massachusetts, the installer
must comply with the additional requirement
outlined on pages 33 and 34.
Agas vent extending through a sidewall should
not terminate near an adjacent wall or below any
building extensions such as roof eaves, balconies
or decks. Failure to comply with the required
clearances could result in severe personal injury,
death or substantial property damage.
WARNING
NOTICE
NOTICE Direct Vent -Horizontal
The installer has three options when direct venting hori-
zontally, Concentric, Wall Thimble or Two Pipe. The
three vent options are shown in Figs. 9 through 11A
pages 13 through 18. Both the Concentric and Wall
Thimble options are available in accessory kits through
Triangle Tube. See Figs. 10 & 11 for Wall Thimble and
Two Pipe installation details or the MODULATING
DELTA Concentric Vent Installation Manual for addition-
al Concentric details. Both the Concentric and Two Pipe
can snorkel up outside the building a maximum of 36”.
Direct Vent Installation of Vent/Air Piping
Hose
Clamps
Flexible
Air Hose
Combustion
Air Inlet
Appliance
Adapter
Spring
Clip
Flue
Outlet
Condensate
Drain Hose
3" Diameter
Trap Loop
Cable
Ties
To Drain According
to Local Codes
Horizontal Termination
Adapter With AIr
Holes Facing Down
12” Min. Above
Grade or Projected
Snow Line
Termination
Straight or Tee or Hood
with Bird Screen (s)
Thimble -
Seal Around
Thimble & Pipe
With Silcone
24” Max.
000
Direct Vent - Horizontal Concentric
See MODULATING DELTAConcentric Vent Installation Manual for Installation Details
Fig. 9:

Direct Vent Installation of Vent/Air Piping
14
12” Min & 36” Max.
Above Grade or
Projected Snow Line
Thimble -
Seal Around
Thimble & Pipe
With Silcone
24” Max.
36”Max.
Termination-
Straight or Tee or Hood
with Bird Screen (s)
Vertical
Support Leg
Horizontal
Termination
Adapter With
AIr Holes
Facing Down
2Foot
Length
90 Elbow
Hose
Clamps
Flexible
Air Hose
Combustion
Air Inlet
Appliance
Adapter
Spring
Clip
Flue
Outlet
Condensate
Drain Hose
3" Diameter
Trap Loop
Cable
Ties
To Drain According
to Local Codes
000
Direct Vent - Horizontal Concentric Snorkel
See MODULATING DELTA Concentric Vent Installation Manual for Installation Details
Fig. 9A:

15
Direct Vent Installation of Vent/Air Piping
Hanger
Strap
Triangle Tube
Wall Thimble Kit
Installed Flush
with Wall
Appliance
Adaptor
Elbow
Drain
Tee
Refer to Vent
Manufacturer's
Recommended
Clearances
Refer to Vent Manufacturer's
Recommended Spacing of Support
000
To Drain
According to
Local Codes
Termination -
Straight or Tee or Hood
with Bird Screen(s)*
6” Min.
& 12” max.
*Termination - Tee or Hood must be Installed Horizontally
12” Min. Above
Grade or Projected
Snow Line
Direct Vent - Horizontal Wall Thimble
Fig. 10:

16
Direct Vent Installation of Vent/Air Piping
Thimble
Sleeve
Outside End Cap
Attach to outer wall
with combustion air inlet
openings facing downward
using galvanized screws
Split Ring
may be used
to provide
addition seal
Ter mination Hood
- must vent horizontally
- attach to Outside End Cap
3" to 4" reducer
combustion
air inlet piping
Inside End Cap
Apply high temp.
silicon bead to seal
around vent pipe
Note: Use Locking Bands
inside the Thimble Box
against the inside and
outside End Caps to prevent
movement of the vent piping.
Vent Piping
extend through thimble box
to termination fitting
Split Ring
Ter mination Straight
Ter mination Tee
- must vent horizontally
- must extend a minimum 6" beyond
Outside End Cap. DO NOT extend
more than 12"
- must extend a minimum 6" beyond
Outside End Cap. DO NOT extend
more than 12"
OR
OR
Direct Vent - Horizontal Wall Thimble Termination Assembly
Fig. 10A:

Direct Vent Installation of Vent/Air Piping
Combustion Air
Termination
Vent Termination
12” Min.
24” Max.
12” Min.
Above Grade or
Projected Snow Line
Tee or Hood
Venting Vertically
Or
12” Min.
90º Elbow
with Bird Screen
Installed on Either
Side of Vent
12” Min.
Combustion Air
Termination
Vent Termination
12” Min.
24” Max.
12” Min.
Above Grade or
Projected Snow Line
Combustion Air
Termination
Vent Termination
12” Min.
24” Max.
12” Min.
Above Grade or
Projected Snow Line
12” Min.
24” Max.
Above Combustion
Air Inlet
90º Elbow
with Bird Screen
Tee or Hood
Venting Horizontally
Straight
Or
12” Min.
90º Elbow
with Bird Screen
Installed on Either
Side of Vent
12” Min.
Direct Vent - Horizontal Two Pipe Termination Options
Fig. 11:
17