Lochinvar Armor AWH0400N User manual

Installation & Operation
Manual
Models: 400 - 1000
Series 100 & 101
This manual must only be used by
a qualified heating installer / service
technician. Read all instructions,
including this manual and the
Armor Water Heater Service
Manual, before installing. Perform
steps in the order given. Failure
to comply could result in severe
personal injury, death, or substantial
property damage.
⚠WARNING
Save this manual for future reference.
100331786_2000588637_Rev B
-- This water heater MUST NOT be installed in
any location where gasoline or flammable vapors
are likely to be present.
-- WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electric switch; do not use any
phone in your building.
•Immediately call your gas supplier from a near by
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
•Installation and service must be performed by a
qualified installer, service agency, or the gas
supplier.
⚠WARNING: If the information in this
manual is not followed exactly, a fire or
explosion may result causing property damage,
personal injury or loss of life.

2
Hazard definitions
The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or
to important information concerning the life of the product.
⚠DANGER
⚠WARNING
⚠CAUTION
CAUTION
NOTICE
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
related to personal injury or property damage.
HAZARD DEFINITIONS .................................................. 2
PLEASE READ BEFORE PROCEEDING..................... 3
THE ARMOR WATER HEATER -- HOW IT WORKS 4-5
RATINGS .......................................................................... 6
1. DETERMINE WATER HEATER LOCATION
Provide Clearances............................................................ 7
Provide Air Openings to Room .......................................... 9
Flooring and Foundation ................................................... 9
Residential Garage Installation .......................................... 9
Vent and Air Piping ............................................................ 9
Prevent Combustion Air Contamination............................. 9
Corrosive Contaminants and Sources ............................. 10
Using an Existing Vent System to Install a New Water
Heater............................................................................... 10
Removing a Water Heater from Existing Common Vent . 11
2. PREPARE WATER HEATER
Remove Water Heater from Wood Pallet ........................ 12
Gas Conversions......................................................... 12-13
3. GENERAL VENTING
Direct Venting Options ..................................................... 14
Install Vent and Combustion Air Piping ........................... 15
Requirements for Installation in Canada.......................... 16
Sizing ............................................................................... 16
Min./Max. Combustion Air & Vent Piping Lengths ............ 16
Materials............................................................................ 17
Optional Room Air............................................................ 18
PVC/CPVC ....................................................................... 18
Polypropylene................................................................... 20
Stainless Steel Vent ......................................................... 21
4. SIDEWALL DIRECT VENTING
Vent/Air Termination - Sidewall................................... 22-31
Determine Location................................................ 22-27
Prepare Wall Penetrations.......................................... 27
Multiple Vent/Air Terminations ......................................... 28
Sidewall Termination - Optional Concentric Vent ....... 29-31
5. VERTICAL DIRECT VENTING
Vent/Air Termination - Vertical .................................... 32-33
Determine Location..................................................... 32
Prepare Roof Penetrations ......................................... 33
Multiple Vent/Air Terminations.................................... 33
Vertical Termination - Optional Concentric Vent ... 34-35
Alternate Vertical Concentric Venting.................... 36-37
6. OUTDOOR INSTALLATIONS
Outdoor Venting .......................................................... 38-39
Outdoor Vent / Air Inlet Location................................. 38-39
Location of Unit ................................................................ 38
7. SYSTEM PIPING
System Water Piping Methods......................................... 40
Scalding............................................................................ 40
Water Chemistry............................................................... 40
Piping Components.......................................................... 41
8. GAS CONNECTIONS
Connecting Gas Supply Piping ........................................ 47
Natural Gas ...................................................................... 48
Pipe Sizing for Natural Gas ........................................ 48
Natural Gas Supply Pressure Requirements ............. 48
Propane Gas .................................................................... 48
Pipe Sizing for Propane Gas ...................................... 48
Propane Supply Pressure Requirements ................... 48
Check Inlet Gas Supply ................................................... 49
Gas Pressure ................................................................... 50
Gas Valve Replacement .................................................. 50
9. FIELD WIRING
Line Voltage Connections ................................................ 51
Low Voltage Connections ................................................ 51
Wiring of the Cascade...................................................... 53
10. CONDENSATE DISPOSAL
Condensate Drain ............................................................ 55
11. START-UP ............................................................ 56-62
12. OPERATING INFORMATION
General............................................................................. 63
Cascade ........................................................................... 65
Sequence of Operation .................................................... 66
Armor Water Heater Control Module ............................... 67
13. MAINTENANCE
Maintenance & Annual Startup ................................... 68-72
14. DIAGRAMS
Ladder Diagram ............................................................... 73
Wiring Diagram................................................................. 74
Revision Notes .................................................. Back Cover
Contents

Installation & Operation Manual
Please read before proceeding
Installer – Read all instructions, including
this manual and the Armor Water Heater
Service Manual, before installing. Perform
steps in the order given.
Have this water heater serviced/inspected
by a qualified service technician, at least
annually.
Failure to comply with the above could
result in severe personal injury, death or
substantial property damage.
Failure to adhere to the guidelines on this
page can result in severe personal injury,
death, or substantial property damage.
When servicing the water heater –
• To avoid electric shock, disconnect electrical supply
before performing maintenance.
• To avoid severe burns, allow the water heater to cool
before performing maintenance.
Water heater operation –
• Do not block flow of combustion or ventilation air to
the water heater.
• Should overheating occur or gas supply fail to shut off,
do not turn off or disconnect electrical supply to
circulator. Instead, shut off the gas supply at a location
external to the appliance.
• Do not use this water heater if any part has been under
water. The possible damage to a flooded appliance can
be extensive and present numerous safety hazards. Any
appliance that has been under water must be replaced.
When calling or writing about the water
heater – Please have the water heater
model and serial number from the water
heater rating plate.
Consider piping and installation when
determining water heater location.
Any claims for damage or shortage in
shipment must be filed immediately
against the transportation company by the
consignee.
Factory warranty (shipped with unit) does
not apply to units improperly installed or
improperly operated.
3
-- This water heater MUST NOT be
installed in any location where gasoline or
flammable vapors are likely to be present.
-- WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electric switch; do
not use any phone in your building.
•Immediately call your gas supplier from
a near by phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier,
call the fire department.
•Installation and service must be
performed by a qualified installer,
service agency, or the gas supplier.
⚠WARNING
NOTICE
⚠WARNING
⚠WARNING If the information in this manual is not
followed exactly, a fire or explosion may
result causing property damage, personal
injury or loss of life.
⚠WARNING DO NOT install units in rooms or
environments that contain corrosive
contaminants (see Table 1A). Failure to
comply could result in severe personal
injury, death, or substantial property
damage.
⚠WARNING The California Safe Drinking Water and
Toxic Enforcement Act requires the
Governor of California to publish a list of
substances known to the State of California
to cause cancer, birth defects, or other
reproductive harm, and requires businesses
to warn of potential exposure to such
substances.
This product contains a chemical known to
the State of California to cause cancer, birth
defects, or other reproductive harm. This
water heater can cause low level exposure
to some of the substances listed in the Act.

Installation & Operation Manual
4
The Armor Water Heater - How it works...
1. Stainless steel heat exchanger
Allows water to flow through specially designed coils for maximum
heat transfer, while providing protection against flue gas corrosion.
The coils are encased in a jacket that contains the combustion
process.
2. Combustion chamber access cover
Allows access to the combustion side of the heat exchanger coils.
3. Blower
The blower pulls in air and gas through the venturi (item 5). Air
and gas mix inside the blower and are pushed into the burner, where
they burn inside the combustion chamber.
4. Gas valve
The gas valve senses the negative pressure created by the blower,
allowing gas to flow only if the gas valve is powered and combustion
air is flowing.
5. Venturi
The venturi controls air and gas flow into the burner.
6. Flue gas sensor (limit rated, not shown)
This sensor monitors the flue gas exit temperature. The control
module will modulate and shut down the water heater if the flue gas
temperature gets too hot. This protects the flue pipe from
overheating.
7. Water heater outlet temperature sensor (housed with the
high limit sensor)
This sensor monitors water heater outlet water temperature
(system supply). If selected as the controlling sensor, the control
module adjusts water heater firing rate so the outlet temperature is
correct.
8. Water heater inlet temperature sensor
This sensor monitors return water temperature (system return). If
selected as the controlling sensor, the control module adjusts the
water heater firing rate so the inlet temperature is correct.
9. Flow Switch
The flow switch is a safety device that ensures flow through the
heat exchanger during operation. This appliance is low mass
and should never be operated without flow. The flow switch makes
contact when flow is detected and allows the unit to operate. If flow
is discontinued during operation for any reason the flow switch will
break the control circuit and the unit will shut down.
10. Electronic display
Digital controls with SMART TOUCH screen technology, full color
display, and an 8"user interface screen.
11. Flue pipe adapter
Allows for the connection of the PVC vent pipe system to the
water heater.
12. Burner (not shown)
Made with metal fiber and stainless steel construction, the burner
uses pre-mixed air and gas and provides a wide range of firing rates.
13. Water outlet
Water connection that supplies hot water to the tank.
14. Water inlet
Water connection that returns water from the tank to the heat
exchanger.
15. Gas connection pipe
Threaded pipe connection. This pipe should be connected to the
incoming gas supply for the purpose of delivering gas to the water
heater.
16. SMART TOUCH Control Module
The SMART TOUCH Control responds to internal and external
signals and controls the blower, gas valve, and pumps to meet the
demand.
17. Air intake adapter
Allows for the connection of the PVC air intake pipe to the
water heater.
18. High voltage junction box
The junction box contains the connection points for the line
voltage power and the pump.
19. Water heater drain port
Location from which the heat exchanger can be drained.
20. Low voltage connection board
The connection board is used to connect external low voltage
devices.
21. Low voltage wiring connections (knockouts)
Conduit connection points for the low voltage connection
board.
22. Condensate drain connection
Connects the condensate drain line to a 1/2" PVC connection.
23. Access cover - front (not shown)
Provides access to the gas train and the heat exchanger.
24. Ignition electrode
Provides direct spark for igniting the burner.
25. Flame inspection window (not shown)
The quartz glass window provides a view of the burner surface
and flame.
26. Gas shutoff valve (not shown)
Manual valve used to isolate the gas valve from the gas supply.
27. High limit sensor (housed with the outlet temperature
sensor)
Device that monitors the outlet water temperature. If the
temperature exceeds its setting, the integrated control will
break the control circuit, shutting the water heater down.
28. Relief valve
Protects the heat exchanger from over pressure and temperature
conditions. The relief valve is set at 150 PSI.
29. Flame sensor (not shown)
Used by the control module to detect the presence of burner
flame.
30. Line voltage wiring connections (knockouts)
Conduit connection points for the high voltage junction box.
31. Top panel
Removable panel to gain access to the internal components.
32. Power switch
Turns 120 VAC ON/OFF to the water heater.
33. Air box
The air box houses the combustion air filter.
34. Air pressure switch
The air pressure switch detects blocked inlet or outlet
conditions.
35. Pump relay
The pump relay is used to control the circulation pump.
36. Transformer
The transformer provides 24V power to the integrated control.
37. Air filter (not shown)
The air filter prevents dirt and debris from entering the burner.

Installation & Operation Manual
5
The Armor Water Heater - How it works... (continued)
Rear View - Models 650 - 1000 Left Side (inside unit) - Models 650 - 1000
DIR #2000589238 00
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Models 400 - 500
Rear View - Models 400 - 500 Left Side (inside unit) - Models 400 - 500
DIR #2000589256 00
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DIR #2000589257 00
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Models 650 - 1000
DIR #2000589239 00
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Installation & Operation Manual
Ratings
Notes:
1. Armor water heaters require special gas venting. Use
only the vent materials and methods specified in the
Armor Installation and Operation Manual.
2. For US installations above 2,000 feet elevation,
reference NFPA 54 for de-rate information.
De-rate values are based on proper combustion
calibration and CO adjusted to the recommended
levels.
3. For Canadian installations above 2,000 feet elevation,
follow all applicable local codes and regulations.
4. The manual reset high limit provided with the Armor
is listed to UL353 or UL60730-2-9. The auto reset high
limit is listed to ANSI Z21.87.
6
Maximum allowed working pressure is located on the rating plate.
NOTICE
Model Number
Note: Change “N”
to “L” for L.P. gas
models.
CSA
Input Modulation MBtu/hr Water Content
Gallons
Water
Connection Gas Connection Vent/Air Size
Min Max
AWH0400(N,L) 39.9 399 4.4 2" 1" 4"/4"
AWH0500(N,L) 50 500 4.9 2" 1" 4"/4"
AWH0650(N,L) 65 650 6.2 2" 1-1/4" 4"/6"
AWH0800(N,L) 80 800 7.3 2" 1-1/4" 4"/6"
AWH1000(N,L) 99.9 999 8.8 2-1/2" 1-1/4" 6"/6"
HLW LOW LEAD CONTENT

Installation & Operation Manual
1 Determine water heater location
7
The Armor water heater gas manifold
and controls met safe lighting and other
performance under tests specified in ANSI
Z21.10.3 – latest edition.
Failure to keep water heater area clear and
free of combustible materials, gasoline, and
other flammable liquids and vapors can
result in severe personal injury, death, or
substantial property damage.
Installation must comply with:
• Local, state, provincial, and national codes, laws, regulations,
and ordinances.
• National Fuel Gas Code, ANSI Z223.1 – latest edition.
• National Electrical Code.
• For Canada only: B149.1 Installation Code, CSA C22.1
Canadian Electrical Code Part 1 and any local codes.
Before locating the water heater, check:
1. Check for nearby connection to:
• Water piping
• Venting connections
• Gas supply piping
• Electrical power
2. Locate the appliance so that if water connections should
leak, water damage will not occur. When such locations
cannot be avoided, it is recommended that a suitable
drain pan, adequately drained, be installed under the
appliance. The pan must not restrict combustion air
flow. Under no circumstances is the manufacturer to be
held responsible for water damage in connection with
this appliance, or any of its components.
3. Check area around the water heater. Remove any
combustible materials, gasoline and other flammable
liquids.
4. The Armor water heater must be installed so that gas
control system components are protected from dripping or
spraying water or rain during operation or service.
5. If a new water heater will replace an existing water heater,
check for and correct system problems, such as system leaks
causing oxygen corrosion or heat exchanger cracks from
hard water deposits.
6. Check around the water heater for any potential air
contaminants that could risk corrosion to the water heater
or the water heater combustion air supply (see Table 1A).
Prevent combustion air contamination. Remove any of
these contaminants from the water heater area.
Provide clearances:
Clearances from combustible materials
1. Hot water pipes—at least 1/4" (6 mm) from combustible
materials.
2. Vent pipe – Follow special vent system manufacturer’s
instructions.
3. See FIG. 1-1 and 1-2 for other clearance minimums.
Recommended clearances for service access
- Front / Top / Left Side / Rear......................................... 24"
Closet and alcove installations
This appliance requires a special venting
system. If using PVC the vent connection
to the appliance must be made with a
CPVC pipe section. The field provided
vent fittings must be cemented to the CPVC
pipe section. Use only the vent materials,
primer and cement specified in this manual
to make the vent connections. Failure to
follow this warning could result in fire,
personal injury, or death.
For closet and alcove installations as shown
in FIG. 1-1 and 1-2, CPVC vent material
must be used inside the structure. The
ventilating air openings shown in FIG. 1-1
and 1-2 are required for this arrangement.
Failure to follow this warning could result
in fire, personal injury, or death.
⚠WARNING
⚠WARNING
NOTICE
⚠WARNING
A closet is any room the water heater is installed in which is
less than 26 cubic feet for AWH400-500 models, 35 cubic feet
for AWH650-800 models, and 39 cubic feet for AWH1000
models.
An alcove is any room which meets the criteria for a closet
with the exception that it does not have a door.
Example: Room dimensions = 5 feet long, 4 feet wide, and
8 foot ceiling = 5 x 4 x 8 = 160 cubic feet. This would be
considered a closet for a Armor water heater.
⚠WARNING Unless specified as an outdoor appliance, this
product is certified as an indoor appliance.
Do not install the appliance outdoors or
locate where the appliance will be exposed
to freezing temperatures or to temperatures
that exceed 100°F.
Do not install the appliance where the
relative humidity may exceed 93%. Do not
install the appliance where condensation
may form on the inside or outside of the
appliance, or where condensation may fall
onto the appliance.
Failure to install the appliance indoors could
result in severe personal injury, death, or
substantial property damage.
DO NOT install units in rooms or
environments that contain corrosive
contaminants (see Table 1A). Failure to
comply could result in severe personal injury,
death, or substantial property damage.
⚠WARNING
If you do not provide the recommended
service clearances shown, it may not be
possible to service the appliance without
removing it from the space.
NOTICE
DO NOT install the appliance in a room likely to freeze.

Installation & Operation Manual
1 Determine water heater location
8
13"
TOP
18" (457 MM)
FRONT
14" (356 MM)
REAR
12"
(305 MM)
LEFT
0"
RIGHT
OPEN
FRONT
1/4" (6 MM) MINIMUM CLEARANCE
AROUND HOT WATER PIPES
1" (25 MM) MINIMUM CLEARANCE
AROUND VENT PIPE
DIR #2000589270 00
Figure 1-2 Alcove Installation - Minimum Required Clearances
13"
TOP
12"
(305 MM)
LEFT
14" (356 MM)
REAR
6" (152 MM)
FRONT
6"
0"
RIGHT
VENTILATING*
AIR OPENING
VENTILATING*
AIR OPENING
CLOSED DOOR
1/4" (6MM) MINIMUM CLEARANCE
AROUND HOT WATER PIPES
1" (25 MM) MINIMUM CLEARANCE
AROUND VENT PIPE
DIR #2000589268 00
Figure 1-1 Closet Installation - Minimum Required Clearances
⚠WARNING
⚠WARNING
For closet installations, CPVC,
polypropylene or stainless steel
vent material MUST BE used in
a closet structure due to elevated
temperatures. Failure to follow
this warning could result in fire,
personal injury, or death.
For alcove installations, CPVC,
polypropylene or stainless steel
vent material MUST BE used in
an alcove structure due to elevated
temperatures. Failure to follow
this warning could result in fire,
personal injury, or death.

Installation & Operation Manual
1 Determine water heater location (continued)
9
Provide air openings to room:
Armor water heater alone in equipment room
1. No air ventilation openings into the equipment room are
needed when clearances around the Armor water heater
are at least equal to the SERVICE clearances shown in this
manual. For spaces that do NOT supply this clearance,
provide two openings as shown in FIG. 1-1. Each opening
must provide one square inch free area per 1,000 Btu/hr of
water heater input.
Armor water heater in same space with other gas or
oil-fired appliances
1. Follow the National Fuel Gas Code (U.S.) or CSA B149.1
(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 Armor water heater.
Do not install the water heater in an attic.
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 Armor water heater because it takes its combustion air
from outside (direct vent installation).
Do not install the water heater on carpeting
even if foundation is used. Fire can result,
causing severe personal injury, death, or
substantial property damage.
If flooding is possible, elevate the water heater sufficiently to
prevent water from reaching the water heater.
Flooring and foundation
Flooring
The Armor water heater is approved for installation on
combustible flooring, but must never be installed on carpeting.
Residential garage installation
Precautions
Take the following precautions when installing the appliance in
a residential garage. If the appliance is located in a residential
garage, it should be installed in compliance with the latest
edition of the National Fuel Gas Code, ANSI Z223.1 and/or
CAN/CGA-B149 Installation Code.
• Appliances located in residential garages and in
adjacent spaces that open to the garage and are not part
of the living space of a dwelling shall be installed so that
all burners and burner ignition devices are located not
less than 18 inches (46 cm) above the floor.
• The appliance shall be located or protected so that it is
not subject to physical damage by a moving vehicle.
Vent and air piping
The Armor water heater requires a special vent system, designed
for pressurized venting.
The water heater is to be used for either direct vent installation
or for installation using indoor combustion air. When room air
is considered, see the General Venting Section. Note prevention
of combustion air contamination below 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, unless
otherwise specified. You may use any of the vent/air piping
methods covered in this manual. Do not attempt to install the
Armor water heater using any other means.
Be sure to locate the water heater such that the vent and air piping
can be routed through the building and properly terminated.
The vent/air piping lengths, routing and termination method
must all comply with the methods and limits given in this
manual.
Prevent combustion air contamination
Install air inlet piping for the Armor water heater as described
in this manual. Do not terminate vent/air in locations that can
allow contamination of combustion air. Refer to Table 1A, for
products and areas which may cause contaminated combustion
air.
You must pipe combustion air to the water
heater air intake. Ensure that the combustion
air will not contain any of the contaminants
in Table 1A. Contaminated combustion air
will damage the water heater, resulting in
possible severe personal injury, death or
substantial property damage. Do not pipe
combustion air near a swimming pool, for
example. Also avoid areas subject to exhaust
fumes from laundry facilities. These areas
will always contain contaminants.
⚠WARNING
⚠WARNING
⚠WARNING
Seismic bracing
For installations requiring seismic bracing, the base legs of the
appliance are designed to allow for the use of unistrut channel
to meet seismic requirements.

Installation & Operation Manual
1 Determine water heater location
10
Products to avoid:
Spray cans containing chloro/fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning solvents
found in household laundry rooms
Adhesives used to fasten building products and other similar
products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
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
Table 1A Corrosive Contaminants and Sources
Failure to follow all instructions can result
in flue gas spillage and carbon monoxide
emissions, causing severe personal injury
or death.
⚠WARNING
When using an existing vent system to
install a new water heater:
Check the following venting components before installing:
• Material - For materials listed for use with this appliance,
see Section 3 - General Venting. For polypropylene or
stainless steel venting, an adapter of the same
manufacturer must be used at the flue collar connection.
• Size - To ensure proper pipe size is in place, see Table 3A.
Check to see that this size is used throughout the vent
system.
• Manufacturer - For a stainless steel or polypropylene
application, you must use only the listed manufacturers
and their type product listed in Tables 3H and 3J for CAT
IV positive pressure venting with flue producing
condensate.
• Supports - Non-combustible supports must be in place
allowing a minimum 1/4" rise per foot. The supports
should adequately prevent sagging and vertical slippage,
by distributing the vent system weight. For additional
information, consult the vent manufacturer’s
instructions for installation.
• Terminations - Carefully review Sections 3 through 5 to
ensure requirements for the location of the vent and air
terminations are met and orientation of these fit the
appropriate image from the Horizontal or Vertical
options listed in the General Venting Section. For
stainless steel vent, only use terminations listed in Table
3K for the manufacturer of the installed vent.
• Seal - With prior requirements met, the system should be
tested to the procedure listed in parts (c) through (f) of
the Removal of an Existing Water Heater Section.
With polypropylene and stainless steel vent, seal and connect
all pipe and components as specified by the vent manufacturer
used; with PVC/CPVC vent, see the Installing Vent or Air
Piping Section.
⚠WARNING If any of these conditions are not met,
the existing system must be updated
or replaced for that concern. Failure to
follow all instructions can result in flue gas
spillage and carbon monoxide emissions,
causing severe personal injury or death.

Installation & Operation Manual
11
1 Determine water heater location (continued)
When removing a water heater from
existing common vent system:
Do not install the Armor water heater
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.
At the time of removal of an existing water heater, 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 the 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.
⚠DANGER
⚠WARNING
g. Any improper operation of the common venting system
should be corrected so the installation conforms with the
National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or
CAN/CSA B149.1, Natural Gas and Propane Installation
Code. When resizing any portion of the common venting
system, the common venting system 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/NFPA and/or CAN/CSA B149.1, Natural Gas
and Propane Installation Code.

Installation & Operation Manual
12
2 Prepare water heater
Remove water heater from wood pallet
1. After removing the outer shipping carton from the water
heater, remove the parts box.
2. To remove the water heater from the pallet remove the
four (4) lag bolts located at the front and rear of the unit
(FIG. 2-1).
Do not drop the water heater or bump the
jacket on the floor or pallet. Damage to
the water heater can result.
For a water heater already installed, you
must turn off gas supply, turn off power
and allow the water heater to cool before
proceeding. You must also completely test
the water heater after conversion to verify
performance as described under Start-
up, Section 11 of this manual. Failure to
comply could result in severe personal
injury, death, or substantial property
damage.
RIGHT
LAG BOLTS
(QTY. 2)
LEFT
LAG BOLTS
(QTY. 2)
DIR #2000585120 00
Figure 2-1 Water heater Mounted on Shipping Pallet
Gas conversions
NOTICE
⚠WARNING
Models 400-1000 (Venturi w/ LP Orifices)
1. Remove the front access panel from the unit (no tools
required for removal).
2. For Models 400-500: Disconnect the air inlet piping from
the venturi by loosening the band clamp around the rubber
boot coupling. Slide the rubber boot off of the venturi.
For Models 650-1000: Disconnect the venturi from the air
box by removing the four (4) bolts securing it to the air box.
3. For Models 400-500: Disconnect the gas piping from
the venturi by loosening the threaded nut on the venturi.
Replace gasket if damaged.
For Models 650-1000: Disconnect the gas piping from the
venturi by removing the four (4) bolts securing the pipe to
the venturi.
4. Remove the bolts connecting the venturi to the fan. Remove
the natural venturi from the unit (FIG. 2-2a and 2-2b).
5. Install the LP venturi onto the fan taking note of the
following:
a. The UP arrow on the plastic housing is indeed pointing
up.
b. The connection for the gas piping is facing towards the
top of the unit. Reinstall the bolts connecting the
venturi to the fan.
6. Reassemble the gas pipe to the venturi. Install the new
gasket provided in the kit and ensure it is seated properly
before tightening.
7. For Models 400-500: Reconnect the rubber boot on the air
inlet to the venturi inlet and tighten the band clamp at this
connection.
For Models 650-1000: Reinstall the four (4)bolts connecting
the venturi to the air box and tighten.
8. After installation is complete, attach the propane conversion
label (in the conversion kit) next to the appliance rating
plate. Attach the LP caution label (in the conversion kit) to
the rear of the appliance underneath the gas supply piping.
9. Replace the front access panel removed in Step 1 and resume
operation.
⚠DANGER Inspect the O-ring when the blower is
disassembled. The O-ring must be in good
condition and must be installed. Failure to
comply will cause a gas leak, resulting in
severe personal injury or death.
DIR #2000582947 00
SCREWS
QTY. 3
O-RING
ORIFICE
(500 MODELS ONLY)
BLOWER
O-RING
VENTURI
Figure 2-2a Installing Propane Orifice - Models 400-500
DIR #2000582948 00
BLOWER
O-RING
SCREWS
QTY. 4
VENTURI
SCREWS
QTY. 7
GASKET
NUTS
QTY. 4
Figure 2-2b Installing Propane Orifice - Models 650-1000

Installation & Operation Manual
2 Prepare water heater (continued)
DIR #2000582949 00
DIR #2000582949 0
0
DIR
#
2
0
0
0
5
8
2
9
4
9
0
0
DIR #2000582949 0
0
ALLEN
WRENCH
ADJUSTMENT
SCREW
Figure 2-3 Gas Valve Adjustment - Models 400 - 500
⚠WARNING After converting to LP, check combustion
per the Start-up procedure in Section
11 of this manual. Failure to check and
verify combustion could result in severe
personal injury, death, or substantial
property damage.
COVER
ALLEN WRENCH
ADJUSTMENT SCREW
Figure 2-4 Gas Valve Adjustment - Models 650 - 1000
13
10. For Models 400-500: Remove the front panel from the
unit (no tools required for removal).
For Models 650-1000: Remove the top access cover from
the unit (no tools required for removal).
11. For Models 650-1000: Remove the cover on top of the gas
valve (FIG. 2-4).
12. Use a combustion analyzer to verify CO2is within the range
of 9.4 – 10.4%. If not, adjust the screw counterclockwise
incrementally to raise CO2and clockwise to lower CO2
(FIG. 2-3 and 2-4).
13. Replace the gas valve cover and access covers.
14. Replace the front access panel removed in Step 1 and
resume operation.

Installation & Operation Manual
3 General venting
14
DIR #2000589381 00
Figure 3-1 Two-Pipe Sidewall Termination
DIR #2000589390 00
DIR #2000589393 00
Figure 3-3 Two-Pipe Vertical
Termination
Direct venting options - Sidewall Vent
DIR #2000589389 00
Figure 3-2 PVC/CPVC Concentric Sidewall Termination
Figure 3-4 PVC/CPVC Concentric
Vertical Termination
Figure 3-5 Vertical Vent, Sidewall Air
DIR #2000589392 00
Direct venting options - Vertical Vent

Installation & Operation Manual
3 General venting (continued)
DIR #2000589418 00
Figure 3-6 Near Water Heater Air Piping Models 400 - 500
This appliance requires a special venting
system. Use only approved stainless steel,
PVC, CPVC or polypropylene pipe and
fittings listed in Tables 3G, 3H, and 3J for
vent 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 for Canadian
installations.
Install vent and combustion air piping
⚠DANGER The Armor water heater must be vented and
supplied with combustion and ventilation
air as described in this section. Ensure the
vent and air piping and the combustion
air supply comply with these instructions
regarding vent system, air system, and
combustion air quality. See also Section 1
of this manual.
Inspect finished vent and air piping
thoroughly to ensure all are airtight and
comply with the instructions provided and
with all requirements of applicable codes.
Failure to provide a properly installed vent
and air system will cause severe personal
injury or death.
⚠WARNING
NOTICE
⚠WARNING For closet and alcove installations, CPVC,
polypropylene or stainless steel material
MUST BE used in a closet/alcove structure.
Failure to follow this warning could result
in fire, personal injury, or death.
Air intake/vent connections
1. Combustion Air Intake Connector (FIG. 3-6) - Used to
provide combustion air directly to the unit from outdoors. A
fitting is provided on the unit for final connection.
Combustion air piping must be supported per guidelines
listed in the National Mechanical Code, Section 305, Table
305.4 or as local codes dictate.
2. Vent Connector (FIG. 3-7 thru 3-10) - Used to provide a
passageway for conveying combustion gases to the
outside. A transition fitting is provided on the unit for
final connection. Vent piping must be supported per the
National Building Code, Section 305, Table 305.4 or as
local codes dictate.
The Armor water heater vent and air piping can be installed
through the roof or through a sidewall. Follow the procedures
in this manual for the method chosen. Refer to the information
in this manual to determine acceptable vent and air piping
length.
You may use any of the vent/air piping methods covered in this
manual. Do not attempt to install the Armor water heater using
any other means.
You must also install air piping from outside to the water heater
air intake adapter unless following the Optional Room Air
instructions in this manual. The resultant installation is direct
vent (sealed combustion).
⚠WARNING DO NOT mix components from different
systems. The vent system could fail,
causing leakage of flue products into the
living space. Mixing of venting materials
will void the warranty and certification of
the appliance.
⚠WARNING Do not connect any other appliance to
the vent pipe or multiple water heaters to
a common vent pipe. Failure to comply
could result in severe personal injury,
death, or substantial property damage.
Improper installation of venting systems
may result in injury or death.
⚠CAUTION
Follow the instructions in Section 1, page
11 of this manual when removing a water
heater from an existing vent system.
NOTICE
15
Vent system must be pitched 1/4"
minimum per foot back to the appliance
to allow drainage of condensate.
NOTICE

Installation & Operation Manual
3 General venting
Requirements for installation in
Canada
1. Installations must be made with a vent pipe system
certified to ULC-S636.
IPEX is an approved vent manufacturer in Canada
supplying vent material listed to ULC-S636.
2. The first three (3) feet of plastic vent pipe from the
appliance flue outlet must be readily accessible for visual
inspection.
3. The components of the certified vent system must not be
interchanged with other vent systems or unlisted
pipe/fittings. For concentric vent installations, the inner
vent tube must be replaced with field supplied certified
vent material to comply with this requirement.
4. The 3 and 4" Concentric Vent Kit available from
Lochinvar (see Section 4 – Sidewall Termination –
Optional Concentric Vent) and the 3 and 4" Concentric
Vent Kit available from IPEX are both approved for use
on the Armor water heater. Both kits are listed to the
ULC-S636 standard for use in Canada.
Model Kit Number Equivalent Vent
Length
400 - 500 100140484 30 feet
Table 3B Concentric Vent Kit Equivalent Vent Lengths
Minimum / Maximum allowable combustion
air and vent piping lengths are as follows:
Combustion Air = 12 equivalent feet minimum / 100 equivalent
feet maximum
Vent = 12 equivalent feet minimum / 100 equivalent feet
maximum
Table 3A Air Intake/Vent Piping Sizes
Sizing
The Armor water heater uses model specific combustion air
intake and vent piping sizes as detailed in Table 3A below.
Increasing or decreasing combustion air
or vent piping sizes is not authorized,
unless referenced in manual..
NOTICE
When determining equivalent combustion air and vent length,
add 5 feet for each 90° elbow and 3 feet for each 45° elbow.
EXAMPLE: 20 feet of PVC pipe + (4) 90° elbows + (2) 45°
elbows + (1) concentric vent kit (100140484) = 49 equivalent
feet of piping.
Model Air Intake Vent
400 - 500 4 inches (102 mm) 4 inches (102 mm)
650 - 800 4 inches (102 mm) 6 inches (152 mm)
1000 6 inches (152 mm) 6 inches (152 mm)
Model
Air Inlet Vent Input De-Rate
per 25 Feet
of Vent
Air Intake
Diameter
Air Intake Min.
Length
Air Intake Max.
Length Vent Diameter Vent Min. Length
Vent Max.
Length
400 4" 12' 150' 4" 12' 150' 0.78%
500 4" 12' 150' 4" 12' 150' 0.83%
650 4" 12' 150' 6" 12' 150' 2.00%
650 6" 12' 150' 6" 12' 150' 0.60%
800 4" 12' 100' 6" 12' 100' 0.63%
800 6"12'150'6"12'150'0.38%
1000 6" 12' 150' 6" 12' 150' 1.00%
Model
Vent Input De-Rate
per 25 Feet
of Vent
Vent
Diameter
Vent Min.
Length
Vent Max.
Length
400 4" 12' 150' 0.56%
500 4" 12' 150' 0.50%
650 6" 12' 150' 0.10%
800 6" 12' 150' 0.50%
1000 6" 12' 150' 0.66%
Table 3D Direct Vent Minimum/Maximum Allowable Air/Vent Lengths
Table 3C Room Air Minimum/Maximum Allowable Vent
Lengths
Supports
Vent system must be supported horizontally to prevent sagging.
Methods and intervals for support vary by vent manufacturer
and vent material. Vent support methods and intervals shall
adhere to vent manufacturer’s instructions, where applicable.

Installation & Operation Manual
3 General venting (continued)
17
Air inlet pipe materials:
The air inlet pipe(s) must be sealed. Choose acceptable
combustion air inlet pipe materials from the following list:
PVC, CPVC, Polypropylene or ABS
Dryer Vent or Sealed Flexible Duct (not recommended for
rooftop air inlet)
Galvanized steel vent pipe with joints and seams sealed as
specified in this section.
Type “B” double-wall vent with joints and seams sealed as
specified in this section.
AL29-4C, stainless steel material to be sealed to
specification of its manufacturer.
*Plastic pipe may require an adapter (not provided) to transition
between the air inlet connection on the appliance and the plastic
air inlet pipe.
⚠WARNING Using air intake materials other than those
specified can result in personal injury, death
or property damage.
NOTICE The use of double-wall vent or insulated
material for the combustion air inlet pipe is
recommended in cold climates to prevent
the condensation of airborne moisture in the
incoming combustion air.
Sealing of Type “B” double-wall vent material or galvanized
vent pipe material used for air inlet piping on a sidewall or
vertical rooftop Combustion Air Supply System:
a. Seal all joints and seams of the air inlet pipe using either
Aluminum Foil Duct Tape meeting UL Standard 723 or
181A-P or a high quality UL Listed silicone sealant such as
those manufactured by Dow Corning or General Electric.
b. Do not install seams of vent pipe on the bottom of
horizontal runs.
c. Secure all joints with a minimum of three (3) sheet metal
screws or pop rivets. Apply Aluminum Foil Duct Tape or
silicone sealant to all screws or rivets installed in the vent
pipe.
d. Ensure that the air inlet pipes are properly supported.
The PVC, CPVC, or ABS air inlet pipe should be cleaned and
sealed with the pipe manufacturer’s recommended solvents
and standard commercial pipe cement for the material used.
The PVC, CPVC, ABS, Dryer Vent or Flex Duct air inlet pipe
should use a silicone sealant to ensure a proper seal at the
appliance connection and the air inlet cap connection. Dryer
vent or flex duct should use a screw type clamp to seal the vent
to the appliance air inlet and the air inlet cap. Proper sealing
of the air inlet pipe ensures that combustion air will be free of
contaminants and supplied in proper volume.
Follow the polypropylene manufacturer’s instructions when
using polypropylene material as an inlet pipe.
When a sidewall or vertical rooftop combustion air supply
system is disconnected for any reason, the air inlet pipe
must be resealed to ensure that combustion air will be free of
contaminants and supplied in proper volume.
⚠DANGER Failure to properly seal all joints and seams
as required in the air inlet piping may result
in flue gas recirculation, spillage of flue
products and carbon monoxide emissions
causing severe personal injury or death.
Vent, air piping, and termination:
The Armor water heater vent and air piping can be installed
through the roof or through a sidewall. Follow the procedures
in this manual for the method chosen. This unit requires
Category IV venting. Refer to the information in this manual
to determine acceptable vent and air piping length.
Common venting
Armor water heaters may be common vented; however, the
following criteria MUST BE followed:
1. Only Armor water heaters may be connected to the common
vent. DO NOT mix other manufacturer’s appliances or
other Lochinvar models.
2. Armor water heaters connected to the common vent must all
be of the same size.
3. Each Armor water heater must have a Lochinvar supplied
flue damper installed (see Table 3E).
4. A condensate drain must be installed above the flue damper.
5. Only vertical direct vent, positive pressure, Category IV or
vertical/chimney vent, negative pressure, Category II may
be used when common venting Armor water heaters.
Sidewall common venting is not allowed.
6. Armor water heaters in a common vent must be connected
and controlled with the integral Armor SMART TOUCH
Cascade.
a. The leader may be controlled through the Armor
SMART TOUCH control through BMS (external
0-10V signal), ModBus, BACnet, or its own internally
calculated set point.
b. The Cascade (Members) must be controlled by the
Armor Leader water heater using the Lead/Lag Cascade
option.
For approved common vent sizing, contact the factory.
⚠WARNING When Armor water heaters are common
vented, the criteria above MUST BE followed.
Failure to follow all these requirements will
result in severe personal injury, death, or
substantial property damage.
NOTICE A field supplied inline condensate collection
section MUST BE installed directly above the
backflow preventer.

Installation & Operation Manual
18
3 General venting
If the water heater 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 1A before installing the water
heater or air inlet piping.
If contaminants are found, you MUST:
• Remove contaminants permanently.
—OR—
• Relocate air inlet and vent terminations
to other areas.
⚠WARNING
⚠WARNING
Air contamination
Pool and laundry products and common household and hobby
products often contain fluorine or chlorine compounds. When
these chemicals pass through the water heater, they can form
strong acids. The acid can eat through the water heater wall,
causing serious damage and presenting a possible threat of flue
gas spillage or appliance water leakage into the building.
Please read the information given in Table 1A listing
contaminants and areas likely to contain them. If contaminating
chemicals will be present near the location of the water heater
combustion air inlet, have your installer pipe the water heater
combustion air and vent to another location, per this manual.
Optional room air
Commercial applications utilizing the Armor water heater
may be installed with a single pipe carrying the flue products
to the outside while using combustion air from the equipment
room. In order to use the room air venting option the
following conditions and considerations must be followed.
• The unit MUST be installed with the appropriate
room air kit (Table 3F).
• The equipment room MUST be provided with
properly sized openings to assure adequate
combustion air. Refer to the instructions provided
with the room air kit.
• There will be a noticeable increase in the noise level
during normal operation from the inlet air opening.
• Using the room air kit makes the unit vulnerable to
combustion air contamination from within the
building. Please review Section 1, Prevent
Combustion Air Contamination, to ensure proper
installation.
• Vent system and terminations must comply with the
standard venting instructions set forth in this
manual.
NOTICE Optional room air is intended for
commercial applications. Combustion
air piping to the outside is recommended
for residential applications.
⚠WARNING When utilizing the single pipe method,
provisions for combustion and ventilation
air must be in accordance with Air for
Combustion and Ventilation, of the
latest edition of the National Fuel Gas
Code, ANSI Z223.1, in Canada, the latest
edition of CGA Standard B149 Installation
Code for Gas Burning Appliances and
Equipment, or applicable provisions of the
local building codes.
Model Kit Number Description
400 - 1000 100157616 Room Air Kit
Table 3F Optional Room Air Kit
Installing vent and air piping
Use only cleaners, primers, and solvents that
are approved for the materials which are
joined together.
NOTICE
PVC/CPVC
⚠WARNING The vent connection to the appliance must
be made with CPVC pipe section if PVC/
CPVC vent is to be used. The field provided
vent fittings must be cemented to the CPVC
pipe section using an “All Purpose Cement”
suitable for PVC and CPVC pipe. Use
only the vent materials, primer, and cement
specified in Table 3G to make the vent
connections. Failure to follow this warning
could result in fire, personal injury, or death.
This product has been approved for use with the PVC/CPVC
vent materials listed in Table 3G.
All CPVC and PVC vent pipes must be
glued, properly supported, and the exhaust
must be pitched a minimum of a 1/4 inch
per foot back to the water heater (to allow
drainage of condensate). Horizontal runs
shall have supports suitable for non-metallic
vent piping that do not clamp tightly
onto vent, allowing for vent expansion or
contraction. Supports shall be as close to
the joints and fittings as practical and no
more than 5 feet apart.
NOTICE
When available, follow all vent
manufacturer’s installation instructions.
NOTICE
Flue Damper Kits
Model Damper Size Kit Number
400 4"100056141
500 4" 100056141
650 4" 100056141
800 6" 100056142
1000 6" 100056142
Table 3E Flue damper kits

Installation & Operation Manual
19
3 General venting (continued)
1. Work from the water heater to vent or air termination.
Do not exceed the lengths given in this manual for the
air or vent piping.
2. Cut pipe to the required lengths and deburr the inside
and outside of the pipe ends.
3. Chamfer outside of each pipe end to ensure even
cement distribution when joining.
4. Clean all pipe ends and fittings using a clean dry rag.
(Moisture will retard curing and dirt or grease will prevent
adhesion.)
5. Dry fit vent or air piping to ensure proper fit up before
assembling any joint. The pipe should go a third to
two-thirds into the fitting to ensure proper sealing after
cement is applied.
6. Priming and Cementing:
a. Handle fittings and pipes carefully to prevent
contamination of surfaces.
b. Apply a liberal even coat of primer to the fitting
socket and to the pipe end to approximately 1/2"
beyond the socket depth.
c. Apply a second primer coat to the fitting socket.
d. While primer is still wet, apply an even coat of
approved cement to the pipe equal to the depth of
the fitting socket along with an even coat of
approved cement to the fitting socket.
e. Apply a second coat of cement to the pipe.
Table 3G PVC/CPVC Vent Pipe, and Fittings
NOTE: In Canada, CPVC and PVC vent pipe, ttings and cement/
primer must be ULC-S636 certied.
⚠WARNING Insulation shall not be used on PVC or
CPVC venting materials. The use of
insulation will cause increased vent wall
temperatures, which could result in vent
pipe failure.
f. While the cement is still wet, insert the pipe into
the fitting, if possible twist the pipe a 1/4 turn as
you insert it. NOTE: If voids are present,
sufficient cement was not applied and joint could
be defective.
g. Wipeexcesscementfromthejointremovingringor
beads as it will needlessly soften the pipe.
DIR #2000589419 00
*CPVC STREET ELBOW
MAY BE SUBSTITUTED
NOTE: WHEN USING A PVC/CPVC VENT SYSTEM, THE FIRST
CONNECTION TO THE APPLIANCE MUST BE MADE WITH CPVC.
VENT
Figure 3-7 Near Water Heater PVC/CPVC Venting -
Models 400 - 1000
Approved PVC/CPVC Vent Pipe and Fittings
Item Material Standard
Vent pipe
PVC Schedule 40, 80 ANSI/ASTM D1785
PVC - DWV ANSI/ASTM D2665
CPVC Schedule 40, 80 ANSI/ASTM F441
Vent fittings
PVC Schedule 40 ANSI/ASTM D2466
PVC Schedule 80 ANSI/ASTM D2467
CPVC Schedule 40 ANSI/ASTM F438
CPVC Schedule 80 ANSI/ASTM F439
PVC - DWV ANSI/ASTM D2665
Pipe Cement /
Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
NOTICE: DO NOT USE CELLULAR (FOAM) CORE PIPE

Installation & Operation Manual
3 General venting
20
All vent connections MUST be secured by
the vent manufacturer's joint connector
(FIG. 3-9).
NOTICE
Polypropylene
This product has been approved for use with polypropylene
vent with the manufacturers listed in Table 3H.
All terminations must comply with listed options in this
manual and be a single-wall vent offering.
For support and special connections required, see the
manufacturer’s instructions. All vent is to conform to standard
diameter and equivalent length requirements established.
When determining equivalent combustion air and vent length
for polypropylene single-wall piping:
• 1 foot of Duravent 4 inch single-wall pipe is equivalent
to 1 foot of piping
Flexible polypropylene
For use of flex pipe, it is recommended to have the vent material
in 32°F or higher ambient space before bending at installation.
No bends should be made to greater than 45° and ONLY
installed in vertical or near vertical installations (FIG. 3-8).
Use only the adapters and vent system listed
in Tables 3H and 3I. DO NOT mix vent
systems of different types or manufacturers.
Failure to comply could result in severe
personal injury, death, or substantial
property damage.
⚠WARNING
Installations must comply with applicable
national, state, and local codes. For
Canadian installation, polypropylene vent
must be listed as a ULC-S636 approved
system.
NOTICE
Installation of a polypropylene vent system
should adhere to the vent manufacturer’s
installation instructions supplied with the
vent system.
NOTICE
Table 3H Polypropylene Vent Pipe and Fittings
⚠WARNING Insulation should not be used on
polypropylene venting materials. The use
of insulation will cause increased vent wall
temperatures, which could result in vent pipe
failure.
Table 3I Approved PolypropyleneTerminations
The installer must use a specific vent starter
adapter at the flue collar connection. This
adapter is supplied by the vent manufacturer
to adapt to its vent system. See Table 3I for
approved vent adapters. Discard CPVC
starter piece.
NOTICE
Approved Polypropylene Vent Manufacturers
Make Model Standard
Centrotherm Eco
Systems InnoFlue SW/Flex UL-1738/ULC-S636
Duravent (M & G
Group)
PolyPro Single-Wall /
PolyPro Flex ULC-S636
Model
Centrotherm InnoFlue SW
Polypropylene
Adapter Joint Connector Sidewall Retaining Bracket* Sidewall Adapter* Low Profile Wall Termination
Concentric Wall
Termination
400-500 ISAAL0404 IANS04 IATP0404 ISTAGL0404 ISLPT0404 ICWT462 & ICT0446
650-1000 ISAAL0606 Not Required IATP0606 ISTAGL0606 ISLPT0606 ICWT610 & ICTC06610
Model
DuraVent Polypro
* These parts are only needed if the sidewall termination assembly is
used (see FIG. 4-5B).
Polypropylene
Adapter
Joint
Connector Sidewall Kit*
400-500 4PPS-AD-M 4PPS-LB 4PPS-HLK
650-1000 6PPS-06PVCM-6PPF Not Required 6PPS-HLK
IMG00840
*NOTES: 1) FLEX PIPE MAY ONLY BE RUN IN A VERTICAL ORIENTATION
2) ALL VENT LENGTHS REPRESENTED IN ABOVE CHARTS ARE
EQUIVALENT LENGTHS.
3) SECTION A IS EQUIVALENT FEET OF RIGID PIPE, WHICH MAY
INCLUDE 45 AND 90° ELBOWS. PLEASE SEE SIZING SECTION
FOR DETERMINING EQUIVALENT FEET.
“B” DIM
3” RIGID 3” FLEX 4” FLEX
Duravent 3”
10 FT
20 FT
30 FT
40 FT
50 FT
60 FT
70 FT
80 FT
90 FT
60 FT
53 FT
47 FT
40 FT
33 FT
27 FT
20 FT
13 FT
7 FT
90 FT
80 FT
70 FT
60 FT
50 FT
40 FT
30 FT
20 FT
10 FT
10 FT
20 FT
30 FT
40 FT
50 FT
60 FT
70 FT
80 FT
90 FT
30 FT
27 FT
23 FT
20 FT
17 FT
13 FT
10 FT
7 FT
3 FT
“A” DIM “B” DIM
Duravent 4”
“A” DIM
4” RIGID 4” FLEX
“B” DIM
3” RIGID 3” FLEX 4” FLEX
Centrotherm 3”
10 FT
20 FT
30 FT
40 FT
50 FT
60 FT
70 FT
80 FT
90 FT
45 FT
40 FT
35 FT
30 FT
25 FT
20 FT
15 FT
10 FT
5 FT
90 FT
80 FT
70 FT
60 FT
50 FT
40 FT
30 FT
20 FT
10 FT
“A” DIM
10 FT
20 FT
30 FT
40 FT
50 FT
60 FT
70 FT
80 FT
90 FT
33 FT
29 FT
26 FT
22 FT
18 FT
15 FT
11 FT
7 FT
4 FT
“B” DIM
Centrotherm 4”
“A” DIM
4” RIGID 4” FLEX
CHIMNEY
CAP
A
B
90 FT
80 FT
70 FT
60 FT
50 FT
40 FT
30 FT
20 FT
10 FT
5” FLEX
Figure 3-8 Near Water Heater Flexible Polypropylene
Venting
Figure 3-9 Near Water Heater Polypropylene Venting
DIR #2000589425 00
DURAVENT
ADAPTER
CPVC XF
POLYPRO
ADAPTER
CPVC
STARTER
JOINT CONNECTION
REQUIRED AT ALL
COMPONENT
CONNECTIONS OF
VENT SYSTEM