Installation and Operating Manual
RESIDENTIAL GAS WATER HEATERS
POWER DIRECT VENT GAS MODELS
WITH HOT SURFACE IGNITION
NOT FOR USE IN MANUFACTURED (MOBILE) HOMES
WARNING: If the information in these instructions is not followed exactly, a fire or explosion
may result causing property damage, personal
injury or death.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of
this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from a
neighbor's 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
Read and understand instruction
manual and safety messages
before installing, operating or
servicing this water heater.
Failure to follow instructions and
safety messages could result in
death or serious injury.
Instruction manual must remain
with water heater.
• For Your Safety •
AN ODORANT IS ADDED TO THE GAS USED
BY THIS WATER HEATER.
ALL TECHNICAL AND WARRANTY QUESTIONS: SHOULD BE DIRECTED TO THE LOCAL DEALER FROM WHOM THE WATER HEATER WAS
PURCHASED. IF YOU ARE UNSUCCESSFUL, PLEASE CONTACT THE COMPANY LISTED ON THE RATING PLATE ON THE WATER HEATER.
KEEP THIS MANUAL IN THE POCKET ON HEATER FOR FUTURE REFERENCE
WHENEVER MAINTENANCE ADJUSTMENT OR SERVICE IS REQUIRED.
1701
100228375 (Rev 01)
TABLE OF CONTENTS
Safe Installation, Use And Service . . . . . . . . . . . . . . . . . 3
General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Qualified Installer Or Service Agency . . . . . . . . . . . . . 6
Preparing For The Installation . . . . . . . . . . . . . . . . . . . 6
Installation Requirements For The
Commonwealth Of Massachusetts. . . . . . . . . . . . . . . . . 7
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Get To Know Your Water Heater - Gas Models
(List Referencing Figures 1-5). . . . . . . . . . . . . . . . . . . 9
Replacement Parts And Deliming Products . . . . . . . 10
Combo Heating Inlet And Outlet Side Taps . . . . . . . . 10
Water Piping - Mixing Valve Usage . . . . . . . . . . . . . . 11
Mixing Valves
Water Heater Operation . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Requirements & Wiring Diagram . . . . . . . . 13
Safety Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
High Limit Controls (Energy Cut Off). . . . . . . . . . . . . 14
Thermostat/Water Temperature
Blower High Limit Switch
Blower Air Pressure Switches . . . . . . . . . . . . . . . . . . 14
Locating The New Water Heater . . . . . . . . . . . . . . . . . 14
Facts To Consider About The Location . . . . . . . . . . . 14
Clearances To Combustibles
Floors With Carpeting
Clearances For Servicing
High Ambient Temperature Installations . . . . . . . . . . 15
Important Notes and Warnings
Insulation Blankets . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Air Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installing The New Water Heater . . . . . . . . . . . . . . . . . 17
Water Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Space Heating And Potable Water Systems . . . . . . . 17
Combo Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
System Requirements
Installation
Closed Water Systems . . . . . . . . . . . . . . . . . . . . . . . 19
Thermal Expansion . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Temperature-Pressure Relief Valve. . . . . . . . . . . . . . 20
T&P Valve Discharge Pipe Requirements:
Temperature-Pressure Relief Valve And Pipe
Insulation
High Altitude Installation . . . . . . . . . . . . . . . . . . . . . . 21
Gas Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Sediment Traps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Filling The Water Heater . . . . . . . . . . . . . . . . . . . . . . 23
Termination Clearances (Side Wall) . . . . . . . . . . . . . 24
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Side Wall Vent Terminal Installation
Side Wall Vent For Cold Climates
Tee Termination Installation
Roof Vent Terminal Installation
Concentric Vent Termination Installation
Multiple Concentric Vent Installation
Vent Pipe Material
Polypropylene Vent Systems
Vent Pipe Length And Sizing
2
Vent Screens
Vent Pipe Installation
Vent Pipe Runs
Vent Terminal Installations
Vent Pipe Preparation . . . . . . . . . . . . . . . . . . . . . . . . 33
Blower Assembly Installation. . . . . . . . . . . . . . . . . . . 35
Connections To The Blower And Air Duct
Condensate (Exhaust) . . . . . . . . . . . . . . . . . . . . . . . 37
Condensate (Intake) . . . . . . . . . . . . . . . . . . . . . . . . . 37
Sound Suppressor (Optional) . . . . . . . . . . . . . . . . . . 38
Sound Suppressor At Blower
Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . 39
Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Operating The Temperature Control System . . . . . . . . 41
Gas Control Valve/Thermostat . . . . . . . . . . . . . . . . . 42
For Your Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Start Up Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Condensation
Smoke/Odor
Strange Sounds
Operational Conditions . . . . . . . . . . . . . . . . . . . . . . . 43
Smelly Water
“Air” In Hot-Water Faucets . . . . . . . . . . . . . . . . . . . . 43
Periodic Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 44
General Upkeep . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Venting System Inspection . . . . . . . . . . . . . . . . . . . . 44
Burner Operation And Inspection . . . . . . . . . . . . . . . 44
Combustion Chamber And Burner Cleaning . . . . . . . 45
Housekeeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Temperature-Pressure Relief Valve Test . . . . . . . . . . 45
Draining And Flushing . . . . . . . . . . . . . . . . . . . . . . . . 46
To Drain The Water Heater Storage Tank
To Flush The Water Heater Storage Tank
Anode Rod Maintenance. . . . . . . . . . . . . . . . . . . . . . 47
Leakage Checkpoints . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Reference Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . 49
Troubleshooting Guidelines . . . . . . . . . . . . . . . . . . . . . 51
Lockouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Soft Lockout
Hard Lockout
Resetting The Heater Control . . . . . . . . . . . . . . . . . . 51
Ignition State And Timing . . . . . . . . . . . . . . . . . . . . . 51
System Status And Error Codes . . . . . . . . . . . . . . . . 52
Reading The LED Flash Sequence. . . . . . . . . . . . . . 52
Corrective Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Other Symptoms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
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SAFE INSTALLATION, USE AND SERVICE
Your safety and the safety of others is extremely important in the installation, use and servicing of this water heater.
Many safety-related messages and instructions have been provided in this manual and on your own water heater to warn you
and others of a potential injury hazard. Read and obey all safety messages and instructions throughout this manual. It is very
important that the meaning of each safety message is understood by you and others who install, use or service this water heater.
This is the safety alert symbol. It is used to alert you
to potential personal injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
DANGER
DANGER indicates an imminently
hazardous situation which, if not avoided,
will result in death or injury.
WARNING
WARNING indicates a potentially
hazardous situation which, if not avoided,
could result in death or injury.
CAUTION
CAUTION indicates a potentially
hazardous situation which, if not avoided,
could result in minor or moderate injury.
CAUTION
CAUTION used without the safety alert
symbol indicates a potentially hazardous
situation which, if not avoided, could
result in property damage
All safety messages will generally tell you about the type of hazard, what can happen if you do not follow the safety message
and how to avoid the risk of injury.
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 appliance can cause low level exposure to some of the substances listed in the Act.
This product is certified to comply with a maximum weighted average of 0.25% lead content as required in some areas.
IMPORTANT DEFINITIONS
Qualified Installer: A qualified installer must have ability equivalent to a licensed tradesman in the fields of plumbing,
air supply, venting and gas supply, including a thorough understanding of the requirements of the National Fuel Gas
Code as it relates to the installation of gas fired water heaters. The qualified installer must also be familiar with the
design features and use of flammable vapor ignition resistant water heaters and have a thorough understanding of this
Installation and Operating manual.
Service Agency: A service agency also must have ability equivalent to a licensed tradesman in the fields of plumbing, air
supply, venting and gas supply, including a thorough understanding of the requirements of the National Fuel Gas Code
as it relates to the installation of gas fired water heaters. The service agency must also have a thorough understanding
of this Installation and Operating manual, and be able to perform repairs strictly in accordance with the service guidelines
provided by the manufacturer.
Gas Supplier: The Natural Gas or Propane Utility or service who supplies gas for utilization by the gas burning appliances
within this application. The gas supplier typically has responsibility for the inspection and code approval of gas piping
up to and including the Natural Gas meter or Propane storage tank of a building. Many gas suppliers also offer service
and inspection of appliances within the building.
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GENERAL SAFETY
WARNING
Read and understand instruction
manual and safety messages
before installing, operating or
servicing this water heater.
Failure to follow instructions and
safety messages could result in
death or serious injury.
Instruction manual must remain
with water heater.
DANGER
WARNING
Fire Hazard
For continued protection against
risk of fire:
• Do not install water heater on
carpeted floor.
• Do not operate water heater if
flood damaged.
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
HOT
Temperature limiting valves
are available.
BURN
Read instruction manual for
safe temperature setting.
WARNING
Explosion Hazard
• Overheated water can cause
water tank explosion.
• Properly sized temperature and
pressure relief valve must be
installed in opening provided.
WARNING
Fire or Explosion Hazard
• Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
• Avoid all ignition sources if you smell gas.
• Do not expose water heater control to excessive
gas pressure.
• Use only gas shown on rating plate.
• Maintain required clearances to combustibles.
• Keep ignition sources away from faucets after
extended period of non-use.
Read instruction manual before
installing, using or servicing
water heater.
4
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GENERAL SAFETY
CAUTION
WARNING
Improper Installation, use and service may result
in property damage.
• Before servicing the water heater, make
sure the blower assembly is unplugged
or the electrical supply to the water
heater is tumed "OFF".
• Do not operate water heater if flood damaged.
• Inspect anode rods regularly, replace when significantly
depleted.
• Label all wires prior to disconnection
when servicing controls. Wiring error can
cause improper and dangerous operation. Verify proper operation after
servicing.
• Install in location with drainage.
• Fill tank with water before operation.
• Properly sized thermal expansion tanks are required on all
closed water systems.
• Failure to do this could result in death,
serious bodily injury, or property
damage.
Refer to this manual for installation and service.
WARNING
WARNING
Breathing Hazard - Carbon Monoxide Gas
• Install vent system in accordance with codes.
• Do not operate water heater if flood damaged.
• For operation above 10,100’, a high altitude
orifice must be installed.
• Do not operate if soot buildup is present.
• Do not obstruct water heater air intake with
insulating jacket.
FLAMMBLE
Flammable Vapors
• Do not obstruct blower air intake.
• Do not place chemical vapor emitting products
near water heater.
• Gas and carbon monoxide detectors are
available.
• No vent damper installation is compatible with
this power vented water heater.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Vapors from flammable
liquids may explode and
catch fire causing death or
severe burns.
Do not use or store
flammable products such as
gasoline, solvents or adhesives in the same room or
area near the water heater.
Keep flammable products:
1. far away from heater,
2. in approved containers,
3. tightly closed and
4. out of children's reach.
Water heater has a main
burner and hot surface igniter.
The hot surface igniter:
1. can be triggered at any
time and
2. the hot surface will ignite
flammable vapors.
Vapors:
1. cannot be seen,
2. are heavier than air,
3. go a long way on the floor
and
4. can be carried from other
rooms to the the
electodes by air currents.
Installation: Do not install the water heater where flammable
products will be stored or used.
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INTRODUCTION
Thank You for purchasing this water heater. Properly
installed and maintained, it should give you years of trouble
free service.
Abbreviations found in this Installation and Operating
manual:
• CSA - Canadian Standards Association
• ANSI - American National Standards Institute
• NFPA - National Fire Protection Association
• ASME - American Society of Mechanical Engineers
• UL - Underwriters Laboratories Inc.
• AHRI - Air Conditioning, Heating and Refrigeration
Institute.
This gas-fired water heater is design certified by CSA
International as a Category IV water heater, under Water
Heater Standard ANSI Z21.10.1 • CSA 4.1 or ANSI
Z21.10.3 • CSA 4.3 (current edition), as applicable.
QUALIFIED INSTALLER OR SERVICE AGENCY
Installation and service of this water heater requires ability
equivalent to that of a Qualified Agency (as defined by
ANSI below) in the field involved. Installation skills such
as plumbing, air supply, venting, gas supply and electrical
supply are required in addition to electrical testing skills
when performing service.
ANSI Z223.1 2006 Sec. 3.3.83: “Qualified Agency” - “Any
individual, firm, corporation or company that either in
person or through a representative is engaged in and is
responsible for (a) the installation, testing or replacement
of gas piping or (b) the connection, installation, testing,
repair or servicing of appliances and equipment; that
is experienced in such work; that is familiar with all
precautions required and that has complied with all the
requirements of the authority having jurisdiction.”
If you are not qualified (as defined by ANSI above) and
licensed or certified as required by authority having
jurisdiction to perform a given task, do not attempt to
perform any of the procedures described in this manual.
If you do not understand the instructions given in this
manual do not attempt to perform any procedures outlined
in this manual.
PREPARING FOR THE INSTALLATION
1. Read the “General Safety” section of this manual
first and then entire manual carefully. If you don’t
follow safety rules, the water heater will not
operate properly. It could cause DEATH, SERIOUS
BODILY INJURY AND/OR PROPERTY DAMAGE.
This manual contains instructions for installation,
operation, and maintenance of the gas-fired water
heater. It also contains warnings throughout the
manual that you must read and be aware of. All
warnings and instructions are essential to proper
6
operation of the water heater and your safety. Since
we cannot put everything on the first few pages,
READ ENTIRE MANUAL BEFORE ATTEMPTING
TO INSTALL OR OPERATE THE WATER HEATER.
The installation must conform with these instructions
and local code authority having jurisdiction. In absence
of local codes, installation must comply with current
editions of the “National Fuel Gas Code”, ANSI
Z223.1/NFPA 54 and “National Electrical Code”,
NFPA 70. All documents are available from:
CSA International,
8501 East Pleasant Valley Road,
Cleveland, Ohio, United States
44131-5575.
NFPA documents are also available from:
National Fire Protection Association,
1 Batterymarch Park,
Quincy, MA 02269.
2. The water heater, when installed, must be electrically
grounded in accordance with the local codes or in
the absence of local codes: current edition of the
“National Electrical Code”, NFPA 70.
3. If after reading this manual you have any questions or
do not understand any portion of the instructions, call
the local gas utility or the manufacturer whose name
appears on the rating plate.
4. Carefully plan the place where you are going to put
the water heater. Correct combustion, vent action,
and vent pipe installation are very important in
preventing death from possible carbon monoxide
poisoning and fires (see Figure 13). Examine the
location to ensure the water heater complies with
the “Locating The New Water Heater” section in this
manual.
5. For installation in areas subject to earthquakes, this
water heater must be braced, anchored, or strapped
to avoid falling or moving during an earthquake.
See instructions for correct installation procedures.
Instructions may be obtained from:
California Office of the State Architect,
400 P Street,
Sacramento, CA 95814.
6. Massachusetts Code requires this water heater to be
installed In accordance with Massachusetts 248-CMR
2.00: State Plumbing Code and 248-CMR 5.00.
7. Complies with California Health and Safety code
116875 (known as AB-1953) and with weighted
average maximum of 0.25% lead.
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INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
COMMONWEALTH OF MASSACHUSETTS
For all side wall terminated, horizontally vented power vent, direct vent and power direct vent gas fueled water heaters
installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned
or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above
finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall
be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORS
At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gasfitter shall
observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where
the gas equipment is to be installed. In addition, the installing plumber or gasfitter shall observe that a battery operated
or hard wired carbon monoxide detector with an alarm is installed on each additional level of the dwelling, building or
structure served by the sidewall horizontal vented gas fueled equipment. It shall be the responsibility of the property owner
to secure the services of qualified licensed professionals for the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled equipment is installed in a crawl space or an attic, the hard
wired carbon monoxide detector with alarm and battery back-up may be installed on the next adjacent floor level.
In the event that the requirements of this subdivision can not be met at the time of completion of installation, the owner
shall have a period of thirty (30) days to comply with the above requirements provided that during said thirty (30) day
period, a battery operated carbon monoxide detector with an alarm shall be installed.
APPROVED CARBON MONOXIDE DETECTORS
Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and
be ANSI/ UL 2034 listed and CSA certified.
SIGNAGE
A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height
of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating
appliance or equipment. The sign shall read, in print size no less than one- half (1/2) inch in size, “GAS VENT DIRECTLY
BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS.”
INSPECTION
The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation
unless, upon inspection, the inspector observes carbon monoxide detectors and signage installed in accordance with
the provisions of 248 CMR 5.08(2)(a) 1 through 4.
EXEMPTIONS
The following equipment is exempt from 248 CMR 5.08(2) (a) 1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edition of
NFPA 54 as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate from
the dwelling, building, or structure used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system
design or venting system components with the equipment, the instructions provided by the manufacturer for installation
of the equipment and the venting system shall include:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
MANUFACTURER REQUIREMENTS - GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED
When the manufacturer of Product Approved side wall horizontally vented gas fueled equipment does not provide the
parts for venting the flue gases, but identifies “special venting systems,” the following requirements shall be satisfied by
the manufacturer:
1. The referenced “special venting system” instructions shall be included with the appliance or equipment installation
instructions; and
2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall
include a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all
venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the
appliance or equipment at the completion of the installation.
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7
INSTALLATION GRAPHIC: GAS-FIRED POTABLE
WATER HEATING/SPACE HEATING SYSTEM
•
If your water heater will be installed in the Commonwealth of Massachusetts, refer to the following
graphic during installation and during modifications to the water supply system.
TYPICAL MIXING VALVE INSTALLATION
COMBINATION SPACE HEATING / POTABLE WATER HEATING SYSTEM
EXPANSION TANK
TEMPERED WATER
TO FIXTURES
(MUST MEET TEMPS LISTED
IN MASS. CODE 248 CMR † )
CHECK
VALVE †
COLD WATER INLET
CHECK VALVE †
(1/8” HOLE
DRILLED IN CLAPPER)
VACUUM
RELIEF
VALVE
SHUT-OFF
VALVE
FLOW CONTROL
VALVE
UNION
HOT
WATER
OUT
OUT
SHUT-OFF
VALVE *
MASSACHUSETTS INSTALLATION REQUIREMENTS:
IN
COIL
TO
AIR
HANDLER
SEE
NOTE ‡
WATER HEATER ACCEPTED
BY THE BOARD FOR
INSTALLATION IN
MASSACHUSETTS. †
*
PUMP *
TEMP/
PRESSURE
RELIEF
VALVE
MUST BE VERTICAL TO
REMOVE AIR BUBBLES
MIXING VALVE
(MUST BE INSTALLED BELOW
TOP OF WATER HEATER
AS PER MANUFACTURER’S
RECOMMENDATIONS)
UNION
AIR
HANDLER
100’-0” MAXIMUM DISTANCE
FROM WATER HEATER TO FAN
COIL AND BACK. (DEVELOPED
LENGTH) NOT INCLUDING COIL
IN HEATING UNIT †
1.) CONNECT ELECTRONICALLY-CONTROLLED TIMER TO AN ALL-BRONZE PUMP. PUMP MUST ACTIVATE EVERY 6 HOURS
FOR 60 SECONDS. TURN PUMP TIMER OFF BEFORE CLOSING PIPING LOOP SHUT-OFF VALVE.
2.) ALL WATER PIPING MUST BE INSTALLED AND INSULATED IN ACCORDANCE WITH MASSACHUSETTS CODE (248 CMR
& 780 CMR).
3.) PIPING LOOP BETWEEN WATER HEATER AND AIR HANDLER MUST BE INSTALLED IN COMPLIANCE WITH 248 CMR.
8
†
REQUIRED FOR MASSACHUSETTS.
‡
PIPING FROM THE TOP OF THE WATER HEATER WITH TEES IS ACCEPTABLE.
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TYPICAL INSTALLATION
GET TO KNOW YOUR WATER HEATER - GAS MODELS (LIST REFERENCING FIGURES 1-5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Termination Elbow with Vent Screen
*Vent Pipe
*Vent Pipe Elbow (long radius)
Sound Suppressor (Optional)
*Union (Di-electric water
connection)
Cold-Water Inlet Nipple/Diptube
**Combo Heating System Supply
Outlet (Optional)
T&P Valve
* Discharge Pipe
**Combo Heating System Return
Inlet (Optional)
Gas Control Valve/Thermostat
(Honeywell)
Gas Valve Electronic Control
Module And Cover (Honeywell)
Drain Valve
Outer Gas Door
Manifold Door Assembly (behind
outer door) (see Figure 3 &
Figure 4)
*Metal Drain Pan
*Floor Drain
2
1
3
4
18 Flexible Manifold Tube (see
Figure 3 & Figure 4)
19 ***Control Harness
20 *Sediment Trap
21 *Ground Joint Union (gas
connection)
22 *Main Manual Gas Shut-off Valve
23 *Gas Supply*
24 Anode (under cap)
25 Baffle Assembly
26 Hot-Water Outlet Nipple/Anode
27 *Inlet Water Shut-off Valve
28 ****Rubber Coupling (see Figure 5)
29 Gear Clamp (see Figure 5)
30 ***Blower with Power Cord (see
Figure 5)
31 Air Duct Adapter
32 Air Inlet Snorkel
33 Air Duct
34 *Thermal Expansion Tank (see
“Closed Water Systems” and
“Thermal Expansion” sections)
35 Flame Sensor Rod (see Figure 3 &
Figure 4)
36 Sheet Metal Burner (see Figure 3 &
Figure 4)
*, **, ***, **** see notes on following
page
5
AIR INLET
PIPING
27
1
37 Gas Orifice (see Figure 3 &
Figure 4)
38 Gas Manifold (see Figure 3 &
Figure 4)
39 Hot-Surface Igniter (see Figure 3 &
Figure 4)
40 Manifold Door Gasket (see Figure 3
& Figure 4)
41 Manifold Door (see Figure 3 &
Figure 4)
42 Two Piece Grommet With Clip (see
Figure 3 & Figure 4)
43 Viewport (see Figure 3 & Figure 4)
44 Air Tubing (Intake) (see Figure 5)
45 Blower High Limit Switch (see
Figure 5)
46 Intake Air Pressure Switch (NC)
(inside box) (see Figure 5)
47 Capacitor (see Figure 5)
48 Air Tubing (Exhaust) (see Figure 5)
49 Exhaust Air Pressure Switch (NO)
(inside box) (see Figure 5)
EXHAUST OUTLET
PIPING
2
28
6
5
7
26
34
9
30
5
8
29
31
33
6
25
10
24
23
32
11 12
22
13
21
14 15
20
19
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18
Front View
Figure 1.
17
16
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Rear View
Figure 2.
9
Natural gas and Propane main
burner with igniter assembly
for 40k and 45k Btu/hr models
(item 15 in Figure 1) †.
18
35
Vacuum relief valve
install per local
codes (not supplied
with heater).
37
36
38
39
40
41
43
42
Figure 3.
Natural gas and Propane
(LP) main burner with
igniter assembly for 58k,
62k, 72k and 76k Btu/
hr models (item 15 in
Figure 1) †.
18
Figure 6.
Notes:
*
Items not supplied with the water heater.
** The side recirculation loop connections may not be
used as the primary water inlet and outlet connections.
See “Combo Heating Inlet And Outlet Side Taps”
below.
*** Caution harness has 120 VAC In operation.
**** See “Vent Pipe Installation” for more information.
†
36
37
35
38
39
43
42
Propane (LP) models have Left-hand threads.
REPLACEMENT PARTS AND DELIMING PRODUCTS
Replacement parts and recommended delimer may be
ordered through authorized servicers or distributors. When
ordering parts, provide complete model and serial numbers
(see rating plate), quantity and name of part desired.
Standard hardware items may be purchased locally.
COMBO HEATING INLET AND OUTLET SIDE TAPS
Models equipped with Combo Heating capabilities have
the two side plumbing taps plugged (item 7 and item 10 in
Figure 1 and see also Figure 7 & Figure 8). If the heater
is to be installed in a Combo Heating application, these
plugs must be removed.
40
41
Figure 4.
Shown with
Junction Box Cover
removed for clarity.
30
28
29
44
49
45
48
47
46
Figure 5.
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WATER PIPING - MIXING VALVE USAGE
Mixing Valves
DANGER
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
HOT
BURN
Temperature limiting devices
such as mixing must be
installed when required by
codes and to ensure safe
temperatures at fixtures.
Water heated to a temperature which satisfies space
heating, clothes washing, dish washing, and other
sanitizing needs can scald and cause permanent injury
upon contact. Short repeated heating cycles caused by
small hot-water uses can cause a temperature increase of
the hot water by 20F° higher than the heater’s temperature
settings.
TEMPERED
POTABLE WATER
This appliance has been design certified as complying with
ANSI/CSA Standard for water heaters and are considered
suitable for combination Water (Potable) Heating and
Space Heating but not space heating only applications.
The water supply pressure should not exceed 80 psi. If this
occurs, a pressure reducing valve with a bypass should be
installed in the cold water inlet line. This should be placed
on the supply to the entire house in order to maintain equal
hot and cold water pressures.
SHUT-OFF
VALVE
TEMPERED
POTABLE WATER
NON-TEMPERED
WATER SUPPLY
COLD-WATER
INLET
NON-TEMPERED
WATER RETURN
SUGGESTED PIPING
ARRANGEMENT FOR
TOP CONNECTIONS
MIXING VALVE *
TEMPERATUREPRESSURE
RELIEF VALVE
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
METAL DRAIN
PAN 1.75”
MAX. DEPTH.
AT LEAST 2”
GREATER THAN
THE DIAMETER
OF THE WATER
HEATER.
SUGGESTED PIPING ARRANGEMENT
FOR SIDE CONNECTIONS
SHUT-OFF
VALVE
MIXING
VALVE *
COLD-WATER
INLET
TEMPERATUREPRESSURE
RELIEF VALVE
CERTAIN MODELS
ARE EQUIPPED WITH
SIDE PLUMBING
CONNECTIONS FOR
SPACE HEATING.
THE HOT AND
COLD FITTING
ASSEMBLIES (PART
#9001262005) CAN
BE ORDERED
THROUGH THE
MANUFACTURER
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
DRAIN
VALVE
6” MAX. AIR
GAP*
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER AS PER
MANUFACTURER’S RECOMMENDATIONS)
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
Figure 8.
METAL DRAIN
PAN 1.75” MAX.
DEPTH. AT LEAST 2”
GREATER THAN THE
DIAMETER OF THE
WATER HEATER.
TEMPERED
POTABLE WATER
NONTEMPERED
WATER
SUPPLY
SHUT-OFF
VALVE
MIXING
VALVE *
COLD-WATER
SUPPLY
NON-TEMPERED
WATER RETURN
6” MAX. AIR
GAP*
DRAIN
VALVE
TO HOT
OUTLET
TO COLD
INLET
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER AS PER
MANUFACTURER’S RECOMMENDATIONS)
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER
AS PER MANUFACTURER’S RECOMMENDATIONS)
Figure 9.
Figure 7.
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11
Some people are more likely to be permanently injured
by hot water than others. These include the elderly,
children, the infirm and the physically/mentally disabled.
Table 1 (published by U.S. Government Memorandum,
1978) shows the approximate time-to-burn relationship
for normal adult skin. If anyone using hot water provided
by the water heater being installed fits into one of these
groups, special precautions must be taken.
Water
Temperature
°F
Time for 1st
Degree Burns
(Less Severe Burns)
110
(normal shower temp.)
116
(pain threshold)
WATER HEATER OPERATION
Figure 10 shows the water heater’s sequence of operation
when a call for heat is initiated. The ignition control module
will attempt to light the burner three times. If the ignition
control does not detect ignition it will enter lockout mode
and flash the corresponding error code.
Time for Permanent
Burns 2nd & 3rd
Degree (Most
Severe Burns)
HEATER
THERMOSTAT
CALLS FOR
HEAT
HEATER CONTROL
CHECKS TO ENSURE
BLOWER EXHAUST
PRESSURE SWITCH
IS OPEN
116
35 minutes
45 minutes
122
1 minute
5 minutes
131
5 seconds
25 seconds
140
2 seconds
5 seconds
149
1 second
2 seconds
154
instantaneous
1 seconds
IGNITER IS
ENERGIZED AND GAS
VALVE IS OPENED
BLOWER IS
ENERGIZED
BURNER COMES ON
AND THE FLAME IS
SENSED BY CONTROL
BURNER CONTINUES
TILL THE WATER IN
THE TANK REACHES
THERMOSTAT
SETTING
(U.S. Government Memorandum, C.P.S.C., Peter L. Armstrong,
Sept. 15,1978)
Table 1.
In addition to using lowest possible temperature setting
that satisfies demand of application, a mixing valve should
be installed at water heater (see Figure 7 & Figure 8) or at
hot-water taps to further reduce system water temperature.
Mixing valves are available at plumbing supply stores. Consult
a Qualified Installer or Service Agency. Follow mixing valve
manufacturer’s instructions for installation of the valves.
Before changing the factory setting on the thermostat,
read the “Operating The Temperature Control System”
section in this manual.
CONTROL CHECKS
TO ENSURE:
EXHAUST PRESSURE
SWITCH CLOSES AND
INTAKE PRESSURE
SWITCH REMAINS
CLOSED INDICATING
BLOWER IS
OPERATING AND
THERE ARE NO
BLOCKAGES (INTAKE
OR EXHAUST)
TEMPERATURE
SWITCH REMAINS
CLOSED INDICATING
VENT TEMPERATURE
IS NOT ABOVE THE
ALLOWABLE LIMIT
GAS VALVE IS
CLOSED AND
BURNER SHUTS OFF
BLOWER CONTINUES
FOR A POST PURGE
TIME
HEATER
REMAINS ON
STANDBY UNTIL
NEXT CALL FOR
HEAT
Figure 10.
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CAUTION:
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN
SERVICING CONTROLS. WIRING ERRORS CAN
CAUSE IMPROPER AND DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER SERVICING.
POWER VENT WIRING SCHEMATIC.
ELECTRICAL REQUIREMENTS & WIRING DIAGRAM
WARNING
Electric Shock Hazard
Disconnect power before
servicing.
NOTE: REFER TO THE “INSTALLATION CHECKLIST”
BEFORE OPERATING THIS HEATER.
Replace all parts and panels
before operating.
Failure to do so can result in
death or electrical shock.
1
N
1
L1
EARTH GND
CAPACITOR
Before plugging in the water heater, always make sure:
• The voltage and frequency correspond to that
specified on the water heater wiring diagram.
• The electrical outlet has the proper overload fuse or
breaker protection.
1. The unit must be connected to a 120VAC power
supply. A dedicated circuit is preferred. Do not use a
GFI outlet.
2. The water heater must be properly grounded.
3. This water heater is a polarity sensitive appliance and
will not operate if the power supply polarity is reversed.
Note: Always reference the wiring diagram for the correct
electrical connections.
6
3
5
2
4
1
P1
4
3
2
2
3
1
After making all electrical connections, completely fill the
tank with water and check all connections for leaks. Open
the nearest hot-water faucet and let it run for 3 minutes to
purge the water lines of air and sediment and to ensure
complete filling of the tank. The electrical power may then
be turned on. Verify proper operation after servicing. See
also “Installation Checklist”.
BLOWER
6
FLAME SENSOR
5
HOT SURFACE IGNITER
4
PRESSURE SWITCH (CLOSED)
2
PRESSURE SWITCH (OPEN)
4
4
PRESSURE SWITCH (CLOSED)
HIGH LIMIT SWITCH (CLOSED)
P2
1
4
3
P3
Circled numbers indicate
sequence of operation.
P4
Figure 12.
IF WIRING HAS TO BE REPLACED IN THE FIELD, USE ONLY TYPE TEW 105°C WIRE.
ELECTRICAL RATING 120V, 5A, 60HZ.
3
4
1
YELLOW
2
YELLOW
1
BLUE
WHITE
WHITE
2
IGNITER - FLAME ROD
ASSEMBLY
3
4
WHITE
WHITE-BLUE
WHITE
4
1
5
2
6
3
P
1
J
1
2
2
PRESSURE
SWITCH
(NO)
BLUE
PRESSURE
SWITCH
(NC)
BLUE
CAPACITOR
3
3
4
4
5
5
WHITE - NEUTRAL
6
6
BLACK - LINE
BLUE
HIGH LIMIT SWITCH
BLUE
BROWN
BROWN
WHITE
YELLOW
YELLOW-GREEN
BLOWER
BLUE
BLACK
GREEN - GND
GREEN
120VAC/60HZ
WALL PLUG
HONEYWELL
GAS VALVE
JUNCTION BOX
Figure 11.
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SAFETY LOCKOUTS
This water heater has several lockout features designed
to prevent the heater from operating in unsafe conditions.
The switch will auto reset once the temperature drops
sufficiently.
HIGH LIMIT CONTROLS (ENERGY CUT OFF)
Thermostat/Water Temperature
This feature is a part of the gas control valve/thermostat
(see Figure 1, item 10) and limits the maximum water
temperature. In the event of the water overheating, this
safety feature shuts off the fuel supply to the burner.
BLOWER AIR PRESSURE SWITCHES
The blower/heater is equipped with two air pressure
switches located in the junction box (see Figure 5, item
46 and item 49). These devices are connected in series
and monitor the air pressure produced by the blower. In
the event that the exhaust venting becomes blocked or
sufficiently restricted, the normally open (NO) air pressure
switch will shut down the heater. In the event that the
intake pipe becomes sufficiently blocked or restricted, the
normally closed (NC) air pressure switch will shut down
the heater.
Blower High Limit Switch
This device is located on the blower (see Figure 5, item
45) and limits the maximum temperature of the blower.
If the blower temperature rises above the temperature
setting, the switch opens causing the heater to shut down.
LOCATING THE NEW WATER HEATER
FACTS TO CONSIDER ABOUT THE LOCATION
Carefully choose an indoor location for the new water
heater because the placement is a very important
consideration for the safety of the occupants in the building
and for the most economical use of the appliance. This
water heater is not for use in manufactured (mobile) homes
or outdoor installation.
Whether replacing an old water heater or putting the water
heater in a new location, the following critical points must
be observed:
1. Select a location indoors as close as practical to
the vent termination or location to which the water
heater vent piping is going to be connected, and as
centralized with the water piping system as possible.
2. Selected location must provide adequate clearances
for servicing and proper operation of the water heater.
3. Avoid locations that could cause the water heater to
freeze from outside air.
4. Selected location must provide access to a properly
grounded electrical branch circuit. A dedicated circuit
is preferred. Do not use a GFI outlet.
5. Avoid locations that expose the water heater to direct
sunlight.
6. Keep combustibles such as boxes, magazines,
clothes, etc., away from the water heater area.
Important: Do not use an extension cord to connect the
water heater to an electrical outlet.
CAUTION
Property Damage Hazard
leak, the flow of water will not cause damage to the
structure. For this reason it is not advisable to install the
water heater in an attic or upper floor. In all cases, a metal
drain pan should be installed under the water heater. Metal
drain pans are available at your local hardware store. Such
a metal drain pan must have a clearance of at least 1”
greater than any point on the water heater’s outer jacket
and must be piped to an adequate drain. The pan must
have a maximum depth of 1.75”.
Water heater life depends upon water quality, water
pressure and the environment in which the water heater
is installed. Water heaters are sometimes installed in
locations where leakage may result in property damage,
even with the use of a metal drain pan piped to a drain.
However, unanticipated damage can be reduced or
prevented by a leak detector or water shut-off device used
in conjunction with a piped metal drain pan. These devices
are available from some plumbing supply wholesalers and
retailers, and detect and react to leakage in various ways:
• Sensors mounted in the metal drain pan that trigger an
alarm or turn off the incoming water to the water heater
when leakage is detected.
• Sensors mounted in the metal drain pan that turn off
the water supply to the entire building when water is
detected in the metal drain pan.
• Water supply shut-off devices that activate based on
the water pressure differential between the cold-water
and hot-water pipes connected to the water heater.
• Devices that will turn off the gas supply to a gas water
heater while at the same time shutting off its water
supply.
• All water heaters eventually leak.
• Do not install without adequate drainage.
Installation of the water heater must be accomplished in
such a manner that if the tank or any connections should
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100228375
WARNING
Fire or Explosion Hazard
• Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
• Avoid all ignition sources if you smell gas.
• Do not expose water heater control to excessive gas
pressure.
• Use only gas shown on rating plate.
• Maintain required clearances to combustibles.
• Keep ignition sources away from faucets after extended
period of non-use.
Clearances For Servicing
When installing the heater, consideration must be given to
proper location. Location selected should be as close to
the wall as practicable and as centralized with the water
piping system as possible.
Servicing this appliance, such as changing the anodes,
etc. requires clearances for accessibility and replacement
of parts. The anode could be as long as 35”.
Refer to the current edition of the “National Fuel Gas
Code”, ANSI Z223.1/NFPA 54 for detailed requirements.
Read instruction manual before
installing, using or servicing
water heater.
TOP VIEW
OF CLOSET
WITHOUT DOOR
TOP VIEW OF
CLOSET WITH
DOOR
0” MIN.
0” MIN.
WARNING
5.5” MIN.
0” MIN.
Figure 13.
FLAMMABLES
Flammable Vapors
WARNING
FIRE AND EXPLOSION HAZARD
Can result in serious injury or death
Breathing Hazard - Carbon Monoxide Gas
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance. Storage or
use of gasoline or other flammable vapors or liquids in the
vicinity of this or any other appliance can result in serious injury
or death.
• Install water heater in accordance with the
instruction manual and NFPA 54.
• To avoid injury, combustion and ventilation air
must be taken from outdoors.
• Do not place chemical vapor emitting products
near water heater.
WARNING
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Fire Hazard
For continued protection against
risk of fire:
• Do not install water heater on
carpeted floor.
• Do not operate water heater if
flood damaged.
Clearances To Combustibles
Minimum clearances between water heater and
combustibles are 0” at the sides and rear, 5.5” from the
front and 12” from top (standard clearance.) If clearances
stated on the heater differ from standard clearances, install
water heater according to clearances stated on the heater
(see Figure 13).
FLAMMABLE
Floors With Carpeting
This water heater must not be installed directly on
carpeting. Carpeting must be protected by a metal or
wood panel beneath the appliance extending beyond
the full width and depth of the appliance by at least 3” in
every direction, or if the appliance is installed in an alcove
or closet, the entire floor must be covered by the panel.
Failure to heed this warning may result in a fire hazard.
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HIGH AMBIENT TEMPERATURE INSTALLATIONS
As the room temperature rises, the water heater venting
is exposed to high temperatures from the inside and the
outside. In these situations, attention to the choice of
venting material is necessary. Establishing the ambient
temperatures where the heater and the venting are
installed is very important. Areas that can experience
high ambient environments include closets, alcoves,
areas under staircases, attics (especially in metal roofed
buildings), areas with restricted air movement, rooms with
large solar gains, metal sheds, industrial or commercial
enterprises and venting systems exposed to direct
sunlight. Water heater installations in ambient conditions
hotter than 110°F require the installation of a high ambient
limit switch (kit number 9009024015) and use of CPVC or
polypropylene venting material. Failure to install the proper
vent material will result in a non-compliant installation and
can result in deformation/breakage of the pipe.
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15
WARNING
Breathing Hazard - Carbon Monoxide Gas
• Flue gases may escape if
vent pipe is deformed,
broken, or not properly
connected.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Important Notes and Warnings
• This heater is certified to be installed using Schedule
•
•
•
•
•
16
40 PVC or CPVC or polypropylene plastic vent material.
Only use approved material. All venting material and
components must be joined with the approved primer/
cleaner and solvent cement.
Do not common vent this heater with any other
appliance.
During operation the plastic piping will expand as it
heats up and contract as it cools down. This is normal
for this type of venting. Rigidly fastening the vent piping
can cause undue stress that may result in the cracking
or fracturing the vent piping material. A fracture of the
venting pipe may pose a serious safety hazard. To
prevent stressing of the vent system, all hangers and
supports must allow the vent piping freedom to move.
Use long sweep elbows wherever possible. Closely
coupled elbows and short radius elbows can reduce
the venting capacity.
All power vented water heaters generate a certain
amount of operational noise. In order to minimize
noise transmission to the support structure, it is
recommended to use isolation pads between the pipe
hangers and the vent pipe.
Most power vent installations develop some
condensation in the vent piping. When using long runs
of venting or when the venting passes through cold or
unheated areas, considerable amounts of condensate
from the flue gases can develop. Provision must be
made for the condensate to drain freely from the
system or to be collected in a condensate trap(s) that
can be drained. Damage or fracture of the vent piping
may occur if the condensate is allowed to collect and
freeze. Pooling of condensate can restrict airflow and
can cause nuisance failures of the system.
INSULATION BLANKETS
Insulation blankets are available to the general public for
external use on gas water heaters but are not necessary
with these products. The purpose of an insulation blanket is
to reduce standby heat loss encountered with storage tank
heaters. Your water heater meets or exceeds the current
standards with respect to insulation and standby loss
requirements, making an insulation blanket unnecessary.
Should you choose to apply an insulation blanket to
this heater, you should follow these instructions (For
identification of components mentioned below, see
Figure 1 thru Figure 6). Failure to follow these instructions
will restrict the air flow required for proper combustion and
dilution, potentially resulting in fire, asphyxiation, serious
personal injury or death.
• Do not apply insulation to the top of the water heater,
•
•
•
•
as this will interfere with safe operation of the blower
assembly.
Do not cover the outer door, thermostat or T&P relief
valve.
Do not cover the “Installation And Operating manual”.
Keep it on the side of the water heater or nearby for
future reference.
Do obtain new warning and instruction labels from the
manufacturer for placement on the blanket directly over
the existing labels.
Do inspect the insulation blanket frequently to make
certain it does not sag, thereby obstructing combustion
air flow.
WARNING
Breathing Hazard - Carbon Monoxide Gas
• Do not obstruct water heater air intake(s) with
insulating jacket.
• Gas and carbcn monoxide detectors are available.
• Install water heater in accordance with the
instruction manual and NFPA54.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
AIR REQUIREMENTS
For safe operation an adequate supply of fresh,
uncontaminated air for combustion, dilution and ventilation
must be provided.
Note: Contaminated or dusty air may cause build-up on
the blower wheel resulting in nuisance shut downs.
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100228375
INSTALLING THE NEW WATER HEATER
WATER PIPING
DANGER
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
HOT
BURN
Temperature limiting devices
such as mixing must be
installed when required by
codes and to ensure safe
temperatures at fixtures.
The water supply pressure should not exceed 80 psi. If this
occurs, a pressure reducing valve with a bypass should be
installed in the cold water inlet line. This should be placed
on the supply to the entire house in order to maintain equal
hot and cold water pressures.
HOT WATER CAN SCALD:
Water heaters are intended to produce hot water.
Water heated to a temperature which will satisfy space
heating, clothes washing, dish washing, cleaning and
other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be
permanently injured by hot water than others. These
include the elderly, children, the infirm, or physically/
mentally handicapped. If anyone using hot water fits into
one of these groups or if there is a local code or state law
requiring certain temperature water at the hot-water tap,
then you must take special precautions. In addition to
using lowest possible temperature setting that satisfies
your hot water needs, a means such as a mixing valve,
should be used at hot-water taps used by these people
or at the water heater (see Figure 7 & Figure 8). Valves
for reducing point of use temperature by mixing cold and
hot water are also available.
SPACE HEATING AND POTABLE WATER SYSTEMS
This appliance has been design certified as complying
with American National Standard/CSA Standard for water
heaters and is suitable for combination water (potable)
heating and space heating but not space heating only
applications.
WARNING
Toxic Chemical Hazard
Consult a Qualified Installer or Service Agency. Follow
manufacturer’s instructions for installation of valves.
Before changing the factory setting on thermostat, read
“Operating The Temperature Control System” section in
this manual.
• This water heater should not be connected to any
heating systems or components previously used with
a non-potable water heating appliance.
• All piping components connected to this unit for space
heating applications should be suitable for use with
potable water.
• Toxic chemicals, such as those used for boiler treatment
shall not be introduced into the potable water used for
space heating.
• When the system requires water for space heating at
temperatures higher than required for domestic water
purposes, a mixing valve must be installed. Please
refer to Figure 7 & Figure 8 for suggested piping
arrangement.
Note: Water piping and vent piping occupy the space
above the water heater. Plan the water piping to ensure
it does not cause interference with the vent piping (see
“Planning the Vent System”).
If this water heater is to be used to supply both space
heating and potable water, the instructions listed below
must be followed:
• Be sure to follow the manual(s) shipped with the air
handler or other type heating system.
• This water heater is not to be used as a replacement
for an existing boiler installation.
• Do not use with piping that has been treated with
chromates, boiler seal or other chemicals and do not
add any chemicals to the water heater piping.
• If the space heating system requires water temperatures
in excess of 120°F, steps must be taken to limit
temperatures at fixtures in the potable hot-water supply
for safety and regulatory requirements.
• Pumps, valves, piping and fittings must be compatible
with potable water.
• A properly installed flow control valve is required to
prevent thermosiphoning. Thermosiphoning is the
result of a continuous flow of water through the air
handler circuit during the off cycle. Weeping (blow off)
of the temperature-pressure relief valve (T&P) or higher
than normal water temperatures are the first signs of
thermosiphoning.
• The hot-water line from the water heater should be
vertical past any mixing valve or supply line to the
heating system to remove air bubbles from the system.
• Do not connect the water heater to any system or
components previously used with non-potable water
heating appliances when used to supply potable water.
• Do not connect to non-potable water system.
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COMBO HEATING
This section serves as a guide for the installation and use
of “Combo” heating systems utilizing a domestic water
heater that has been specifically approved for such use.
It is written for those knowledgeable in the required trades
and professionals involved in the design and installation
of Combo Heating Systems.
It is the responsibility of the installer/designer to follow all
applicable codes to ensure the effectiveness and safety
of the installation.
System Requirements
The following requirements must be met for the installation
of Combo Heating Systems:
1. All components used for the distribution of water in
the heating loop must be suitable for potable water.
These include all piping, fittings, solder and fluxes,
pumps for circulation of water, valves, etc.
2. The water heater must not be connected to a hydronic
heating system that has been used previously.
3. No boiler treatment chemicals of any kind shall be
introduced into the system.
4. The Combo System components must be selected
and sized to meet and maintain the total calculated
demands for both domestic service hot water
and space heating requirement. The sizing and
installation must be performed in accordance with
good engineering practice such as “ASHRAE
Handbooks”, HRAI’s Unified Combo Guidelines,
“Hydronics Institute Manuals”, ANSI Z223.1, CSA
F280, National/Provincial Building Codes, ANSI
and/or codes having jurisdiction.
5. The air handler (fan coil) and/or the circulating pump
in a baseboard hydronic loop will require a dedicated
120V circuit. This must be provided and identified for
this purpose.
6. All piping between the water heater and the air handler
or hydronic baseboard loop must be adequately
insulated to reduce heat loss.
7. If the local jurisdiction requires a back-flow preventer
in the cold water line, an expansion tank of adequate
size must be installed.
8. “Combo” Heating Systems require higher water
temperatures than other applications. When the
system is used to supply water for Combo Heating
applications, a means, such as mixing valve, must be
installed to temper the water in order to reduce scald
hazard potential (see Figure 14 & Figure 15).
2. Install a drain valve at the lowest point of the heating
loop so that water can be drained from the heating
module without affecting the water heater.
3. If the air handler does not have a venting means at
the highest point of the piping arrangement, install
an air bleed at the highest point of the plumbing
arrangement.
4. Install a solenoid valve before the side tap return to
prevent cold water from continuously entering the
water heater. Failure to install a solenoid valve could
cause “stacking” and cause the T&P valve to open.
HOT WATER
TO HOUSE
FIXTURE
EXPANSION TANK
(OPTIONAL)
COLD SUPPLY
(see also
Massachusetts
code requirements
on page 7)
CHECK VALVE (IF USED
REQUIRES EXPANSION TANK)
MIXING
VALVE
C
H
M
CHECK
VALVE
FLOW
CONTROL
HOSE BIB
(OPTIONAL)
HOT
OUTLET
EXTERNAL
CIRCULATOR
RETURN
COLD
INLET
WATER
HEATER
DRAIN/
PURGE
VALVE
SUPPLY
INTERNAL
CIRCULATOR
SOLENOID
VALVE
AIR
HANDLER
Figure 14.
HOT WATER
TO HOUSE
FIXTURE
EXPANSION TANK
(OPTIONAL)
COLD SUPPLY
(see also
Massachusetts
code requirements
on page 7)
CHECK VALVE (IF USED
REQUIRES EXPANSION TANK)
MIXING
VALVE
M
C
H
CHECK
VALVE
FLOW
CONTROL
HOSE BIB
(OPTIONAL)
HOT
OUTLET
EXTERNAL
CIRCULATOR
RETURN
Installation
The heating mode may be one of the following options:
A. A fan coil/air handler (Figure 14).
B. A hydronic baseboard (finned tube) loop/In floor
heating (Figure 15).
The following is a list of requirements for the installation
of option A or B.
1. Install shut-off valves and unions so that the water
heater can be isolated from the heating module should
servicing of the water heater become necessary.
18
SUPPLY
COLD
INLET
www.americanwaterheater.com
WATER
HEATER
SOLENOID
VALVE
HYDRONIC
BASEBOARDS
(SERIES
CONNECTED
SHOWN)
Figure 15.
100228375
CLOSED WATER SYSTEMS
Water supply systems may, because of code requirements
or such conditions as high line pressure, among others,
have installed devices such as pressure-reducing valves,
check valves, and back flow preventers. Devices such
as these cause the water system to be a closed system.
THERMAL EXPANSION
As water is heated, it expands (thermal expansion). In a
closed system, the volume of water will increase. As the
volume of water increases, there will be a corresponding
increase in water pressure due to thermal expansion.
Thermal expansion can cause premature tank failure
(leakage). This type of failure is not covered under the
limited warranty. Thermal expansion can also cause
intermittent temperature-pressure relief valve operation:
water discharged from the valve due to excessive pressure
build up. The temperature-pressure relief valve is not
intended for the constant relief of thermal expansion. This
condition is not covered under the limited warranty.
A properly-sized thermal expansion tank should be
installed on all closed systems to control the harmful
effects of thermal expansion. Contact a plumbing service
agency or your retail supplier regarding the installation of
a thermal expansion tank.
SHUT-OFF VALVE
HOT-WATER
OUTLET
UNION
UNION
3/4” SWEAT
FITTING
3/4” SWEAT
FITTING
TEMPERATUREPRESSURE
RELIEF VALVE
SOME
COMPONENTS
NOT SHOWN
FOR CLARITY.
DISCHARGE PIPE
(DO NOT CAP
OR PLUG)
DRAIN
VALVE
METAL
DRAIN
PAN
Note: To protect against untimely corrosion of hot and cold
water fittings, it is recommended that di-electric unions or
couplings be installed on this water heater when connected
to copper pipe.
6” MAX.
AIR GAP
FLOOR
DRAIN
Figure 16.
Figure 16 shows typical attachment of water piping to the
water heater. The water heater is equipped with 3/4” NPT
water connections.
CAUTION
Property Damage Hazard
• Avoid water heater damage.
• Install thermal expansion tank if necessary.
• Do not apply heat to cold water inlet.
• Contact qualified installer or service agency.
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COLDWATER
INLET
Note: If using copper tubing, solder tubing to an
adapter before attaching the adapter to the water heater
connections. Do not solder the water lines directly to the
water heater connections - it will harm the dip tube and
heat traps and damage the tank.
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19
TEMPERATURE-PRESSURE RELIEF VALVE
WARNING
Explosion Hazard
• Temperature-pressure relief
valve must comply with ANSI
Z21.22-CSA4.4 and ASME
code.
• Properly sized temperaturepressure relief valve must be
installed in opening provided.
• Do not plug, block, or cap the
discharge line.
• Failure to follow this warning
can result in excessive tank
pressure, serious injury or
death.
This water heater is provided with a properly rated/sized
and certified combination Temperature-Pressure Relief
Valve (T&P valve) by the manufacturer. The valve is
certified by a nationally recognized testing laboratory
that maintains periodic inspection of production of listed
equipment of materials as meeting the requirements for
Relief Valves for Hot Water Supply Systems, ANSI
Z21.22-CSA 4.4, and the code requirements of ASME.
If replaced, the new T&P valve must meet the requirements
of local codes, but not less than a combination temperaturepressure relief valve rated/sized and certified as indicated
in the above paragraph. The new valve must be marked
with a maximum set pressure not to exceed the marked
hydrostatic working pressure of the water heater (150 psi)
and a discharge capacity not less than the water heater
Btu/hr input rate as shown on the water heater’s model
rating plate.
For safe operation of the water heater, the temperaturepressure relief valve must not be removed from its
designated opening nor plugged. The T&P valve must be
installed directly into the fitting of the water heater designed
for the relief valve. Install discharge piping so that any
discharge will exit the pipe within 6” above an adequate
floor drain. Be certain that no contact is made with any
live electrical part.
The discharge opening must not be blocked or reduced
in size under any circumstances. Excessive length (over
30’), or use of more than four elbows can cause restriction
and reduce the discharge capacity of the valve.
20
No valve or other obstruction is to be placed between the
T&P valve and the tank. Do not connect discharge piping
directly to the drain unless a maximum of 6” air gap is
provided. To prevent bodily injury, hazard to life, or property
damage, the relief valve must be allowed to discharge
water in adequate quantities should circumstances
demand. If the discharge pipe is not connected to a drain
or other suitable means, the water flow may cause property
damage.
CAUTION
Water Damage Hazard
• Temperature-pressure relief valve discharge pipe
must terminate at an adequate drain.
T&P Valve Discharge Pipe Requirements:
• Must not be smaller than the pipe size of the relief
•
•
•
•
valve or have any reducing coupling installed in the
discharge line.
Must not be capped, blocked, plugged or contain
any valve between the relief valve and the end of the
discharge line.
Must terminate a maximum of six inches above a floor
drain or external to the building. In cold climates, it is
recommended that the discharge pipe be terminated
at an adequate drain inside the building.
Must be capable of withstanding 250°F without
distortion.
Must be installed to allow complete drainage of both
the valve and discharge line.
DANGER
• Burn hazard.
• Hot water discharge.
HOT
• Keep clear of
temperature-pressure
relief valve discharge.
BURN
It is recommended to manually operate the T&P valve at
least once a year. Caution should be taken to ensure (1) no
one is in front of or around the outlet of the discharge line,
and (2) the water manually discharged will not cause any
bodily injury or property damage because the water may
be extremely hot. If after manually operating the valve, it
fails to completely reset and continues to release water,
immediately close the cold-water inlet to the water heater,
follow the draining instructions in this manual, and replace
the temperature-pressure relief valve with a properly rated/
sized new one.
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100228375
Note: The purpose of a temperature-pressure relief valve
is to prevent excessive temperatures and pressures in the
storage tank. The T&P valve is not intended for the constant
relief of thermal expansion. A properly sized thermal
expansion tank must be installed on all closed systems to
control thermal expansion, see “Closed Water Systems”
and “Thermal Expansion” sections.
Temperature-Pressure Relief Valve And Pipe
Insulation
The T&P valve installed on this water heater is covered by
insulation to minimize heat loss. The insulation has a hole
on the bottom side to accommodate the valve outlet and
allow for the piping connection. Do not restrict the outlet
opening of the T&P valve.
T&P Relief Valve Insulation
(Outlet opening on underside)
HIGH ALTITUDE INSTALLATION
WARNING
Breathing Hazard - Carbon Monoxide Gas
• For operation above 10,100 ft.
a high altitude orifice must be
installed.
• Contact a qualified installer or
service agency.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
This heater is approved for operation up to 10,100’ without
alteration.
Failure to replace standard orifice with a high altitude orifice
when installed above 10,100’ could result in improper and
inefficient operation of the appliance, producing carbon
monoxide gas in excess of safe limits, which could result
in serious injury or death. Contact your gas supplier for
any specific changes which may be required in your area.
Manual Relief Lever
T&P Relief Valve
T&P Relief Valve
Drain Line
GAS PIPING
Figure 17.
Locate the temperature and pressure relief valve on the
water heater (also known as a T&P relief valve). See
Figure 17.
1. Locate the slit running the length of the T&P relief
valve insulation.
2. Spread the slit open and fit the insulation over the T&P
relief valve. See Figure 17. Apply gentle pressure to
the insulation to ensure it is fully seated on the T&P
Relief Valve. Once seated, secure the insulation with
duct tape, electrical tape, or equivalent. Important:
The insulation and tape must not block the discharge
opening or hinder access to the manual relief lever
(Figure 17). Ensure a discharge pipe is installed into
the T&P valve discharge opening per the instructions
in this manual.
3. Locate the hot water (outlet) & cold water (inlet) pipes
to the water heater.
4. Locate the slit running the length of a section of pipe
insulation.
5. Spread the slit open and slip the insulation over the
cold water (inlet) pipe. Apply gentle pressure along
the length of the insulation to ensure it is fully seated
around the pipe. Also, ensure the base of the insulation
is flush with the water heater. Once seated, secure the
insulation with duct tape, electrical tape, or equivalent.
6. Repeat steps 4 and 5 for the hot water (outlet) pipe.
7. Add additional sections of pipe insulation as needed.
WARNING
Fire and Explosion Hazard
• Do not use water heater with
any gas other than the gas
shown on the rating plate.
• Excessive pressure to gas
control valve can cause serious
injury or death.
• Turn off gas lines during
installation.
• Contact qualified installer or
service agency.
WARNING
Explosion Hazard
Have a qualified technician make sure that the L.P.
gas operating pressure does not exceed 13" water
column.
Failure to do so can result in death, explosion, or
fire.
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21
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
14” w.c. for natural gas and propane gas. The minimum
inlet gas pressure shown on the rating plate is that which
will permit firing at rated input.
All gas piping must comply with local codes and ordinances
or with the “National Fuel Gas Code”, ANSI Z223.1/
NFPA 54. Copper or brass tubing and fittings (except tin
lined copper tubing) should not be used.
If the gas control valve/thermostat is subjected to
pressures exceeding 1/2 psi, the damage to the gas
control valve/thermostat could result in a fire or explosion
from leaking gas.
excess of 1/2 psi. It should be isolated from the gas supply
piping system by closing its individual manual shut-off
valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psi.
Connecting gas piping to the gas control valve/thermostat
of water heater can be accomplished by either of two
methods shown in Figure 18 & Figure 19.
GROUND
JOINT
UNION
(OPTIONAL)
If the main gas line shut-off serving all gas appliances is
used, also turn “OFF” the gas at each appliance. Leave
all gas appliances shut “OFF” until the water heater
installation is complete.
FLEX PIPE
(PROPERLY SIZED
FOR THE HEATER
INPUT RATE)
Figure 18.
BLACK PIPE
There must be:
• A readily accessible manual shut-off valve in the gas
supply line serving the water heater, and
• A sediment trap ahead of gas control valve/thermostat
to help prevent dirt and foreign materials from entering
the gas control valve/thermostat.
• A flexible gas connector or a ground joint union between
the shut-off valve and gas control valve/thermostat to
permit servicing of the unit.
SEDIMENT
TRAP
3” MIN.
GROUND
JOINT
UNION
(OPTIONAL)
GAS
CONTROL
VALVE
CAP
Figure 19.
SEDIMENT TRAPS
WARNING
WARNING
Fire and Explosion Hazard
• Contaminants in gas lines can
cause fire or explosion.
Fire and Explosion Hazard
• Use joint compound or tape
compatible with natural gas
and propane.
• Leak test before operating
heater.
• Disconnect gas piping and
shut-off valve before pressure
testing system.
Use pipe joint compound or Teflon® tape marked as being
resistant to the action of gases.
The appliance and its gas connection must be leak tested
before placing the appliance in operation.
The appliance and its individual shut-off valve should be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
22
GAS
CONTROL
VALVE
CAP
A gas line of sufficient size must be run to the water heater.
Consult the current edition of “National Fuel Gas Code”,
ANSI Z223.1/NFPA 54 and your gas supplier concerning
pipe size.
Be sure to check all the gas piping for leaks before lighting
the water heater. Use a soapy water solution, not a match
or open flame. Repair and retest as required. When
finished, rinse off soapy solution and wipe dry.
SEDIMENT
TRAP
3”
MIN.
• Clean all gas piping before
installation.
• Install sediment trap in accordance with NFPA 54.
A sediment trap should be installed as close to the inlet of
the water heater as practical at the time of water heater
installation. The sediment trap should be either a tee fitting
with a capped nipple in the bottom outlet or other device
recognized as an effective sediment trap. If a tee fitting is
used, it should be installed in conformance with one of the
methods of installation shown in Figure 18 & Figure 19.
Contaminants in the gas lines may cause improper
operation of the gas control valve/thermostat that may
result in fire or explosion. Before attaching the gas line be
sure that all gas pipe is clean on the inside. To trap any
dirt or foreign material in the gas supply line, a sediment
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100228375
trap must be incorporated in the piping. The sediment trap
must be readily accessible. Install in accordance with the
“Gas Piping” section. Refer to the current edition of the
“National Fuel Gas Code”, ANSI Z223.1/NFPA 54.
FILLING THE WATER HEATER
CAUTION
Property Damage Hazard
SHUT-OFF VALVE
HOT-WATER
OUTLET
• Avoid water heater damage.
• Fill tank with water before operating.
COLDWATER
INLET
UNION
• Do not insert the power cord into the electrical
receptacle until the heater has been fully installed.
• Never use this water heater unless it is completely full
SIDE TAP
(OUTLET)
SOME
COMPONENTS
NOT SHOWN
FOR CLARITY.
TEMPERATUREPRESSURE
RELIEF VALVE
DISCHARGE PIPE
(DO NOT CAP
OR PLUG)
SIDE TAP
(INLET)
DRAIN
VALVE
6” MAX. AIR
GAP BELOW
DISCHARGE
PIPE
METAL
DRAIN
PAN
FLOOR
DRAIN
Figure 20.
100228375
of water. To prevent damage to the tank, the tank must
be filled with water. Water must flow from the hot-water
faucet before turning “ON” gas to the water heater.
To fill the water heater with water:
1. Close the water heater drain valve by turning handle
to the right (clockwise). The drain valve is on the lower
front of water heater (see Figure 20).
2. If the heater is equipped with plumbing side taps and
they are not connected to piping, ensure the side taps
have been closed with pipe plugs.
3. Open all hot-water faucets served by the water heater
to allow air to escape from the tank and the water
piping. Ensure any shut-off valves between the heater
and the faucets are the open position.
4. Open the cold-water supply valve to the water heater.
Notes:
• The cold-water supply valve must be left open when
the water heater is in use.
• Avoid water leakage when filling the tank. Do not
allow the insulation of the water heater to get wet as
water can reduce the effectiveness of the insulation.
5. To ensure complete filling of the tank, allow air to exit
by opening nearest hot-water faucet. Allow water to
run until a constant flow is obtained. This will let air
out of the water heater and the piping.
6. Check all water piping and connections for leaks.
Repair as needed.
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23
TERMINATION CLEARANCES (SIDE WALL)
ER
RN
E CO
INSIDDETAIL
V VENT TERMINAL
X AIR SUPPLY INLET
G
AREA WHERE TERMINAL IS NOT PERMITTED
V
A
D
V
B
B
V
C
V
L
D
FIXEED
S
CLO
B
F
L
O
V
B
V
BLE
V
V
D
FIXEED
LE CLOS
B
A
PER
OPERA
B
B
X
M
I
V
X
K
J
OR
ULAT
A
GAS
REG
ER /
MET
Figure 21.
Power Direct Vent Terminal Clearances
A above grade,
veranda, porch,
deck, or balcony
B to window or
door that may be
opened
12 in.
I
to regulator vent
outlet
36 in.
6 in.
9 in.
J to non-mechanical
air supply inlet
to building or the
combustion air
inlet to any other
appliance
K to a mechanical air
supply inlet
6 in.
9 in.
L above equipment or
public walkways
M under veranda,
porch deck, or
balcony
†
for appliances ≤10,000 Btuh (3 kW),
for appliances > 10,000 Btuh (3 kW)
and ≤ 50,000 Btuh (15 kW),
12 in. for appliances > 50,000 Btuh (15 kW)
C to window or
door that is
permanently
closed
D to soffit
0 in.
F to outside corner
24 in.
12 in.
for appliances ≤ 10,000 Btuh (3 kW),
for appliances > 10,000 Btuh (3 kW)
and ≤ 50,000 Btuh (15 kW),
12 in. for appliances > 50,000 Btuh (15 kW)
3 ft. above if within 10 ft. horizontally
12 in. ‡
G to inside corner
18 in.
† Where local experience indicates that condensate is a problem with Category III appliances, the vent shall not terminate over public walkways
or over an area where condensate or vapor could create a nuisance or hazard or could be detrimental to the operation of regulators, relief
valves, or other equipment.
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
24
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100228375
VENTING
CAUTION
WARNING
Improper Installation, use and service may result
in property damage.
Breathing Hazard - Carbon Monoxide Gas
This unit includes an air intake terminal
and an exhaust vent terminal.
• Install water heater in accordance with the
instruction manual and NFPA 54.
• To avoid injury, combustion and ventilation air
must be taken from outdoors.
WARNING
• Do not place chemical vapor emitting products
near water heater.
Breathing Hazard - Carbon Monoxide Gas
• Install vent system In accordance with codes.
• Do not operate water heater if flood damaged.
• Install water heater in accordance with the
instruction manual.
• Do not operate if soot buildup is present.
• Do not obstruct water heater air intake(s) with
insulating blanket.
• Do not place chemical vapor emitting products near
water heater.
• Gas and carbon monoxide detectors are available.
• Never operate the heater unless it is vented to the
outdoors and has adequate air supply to avoid risks
of improper operation, fire, explosion or asphyxiation.
• Analyze the entire vent system to make sure that
condensate will not become trapped in a section of
vent pipe and therefore reduce the open cross
sectional area of the vent.
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Important: DO NOT common vent this water heater with
any power vented appliance. DO NOT vent into a common
chimney.
This water heater has a direct vent system in which all air
for combustion is taken from the outside atmosphere and
all combustion products are discharged to the outdoors.
This water heater must be properly vented for removal
of exhaust gases to the outside atmosphere. Correct
installation of the vent pipe system is mandatory for the
safe and efficient operation of this water heater and is an
important factor in the life of the unit.
A Vent Kit included with this water heater consists of:
1. Blower outlet adapter (rubber coupling and gear
clamps),
2. Two (2) 45° Vent Termination Elbows,
3. More-restrictive Vent Screens (see Figure 36 &
Figure 37),
4. Less-restrictive Vent Screens (see Figure 36 &
Figure 37),
5. Wall Plates,
6. Air intake adapter (3” to 2” ABS reducer) and 3” pipe
nipple (2” venting only).
Vent pipe must be installed in accordance with all local
codes or, in the absence of such, the latest edition of
“National Fuel Gas Code”, ANSI Z223.1/NFPA 54.
100228375
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
Important: Check to make sure the vent pipe is not
blocked in any way.
Note: Do not common vent this water heater with any other
appliance. Do not install in the same chase or chimney
with a metal or high-temperature plastic from another gas
or fuel burning appliance.
Side Wall Vent Terminal Installation
Important: When terminating the vent on a side wall, the
following specifications pertaining to terminal location must
be followed (see Figure 22).
1. The air intake terminal and the exhaust vent terminal
must terminate on the same exterior wall.
2. The vertical centerline of the air intake terminal
must be located at a minimum of 8” from the vertical
centerline of the exhaust vent terminal.
3. The horizontal centerline of the air intake terminal may
not be located more than 24” below the horizontal
centerline of the exhaust vent terminal.
4. To avoid exhaust recirculation, the air intake terminal
may be rotated away from the exhaust vent terminal
(see Figure 22).
CL
SIDE WALL
CL
8”
MIN.
24” MAX
CL
CL
EXHAUST VENT
TERMINAL
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INTAKE VENT
TERMINAL
Figure 22.
25
Side Wall Vent For Cold Climates
Some winter weather conditions present a risk of ice
accumulation at the intake termination screen. Such
accumulation will restrict intake air flow. If local conditions
present this risk, the termination configuration shown in
Figure 23 is recommended. This will reduce the possibility
of exhaust gas recirculation as well as reduce the chance
of ice accumulation.
If necessary to avoid snow accumulation, the intake vent
terminal may be fitted with a riser similar to that on the
exhaust vent terminal. Both the intake and exhaust vent
terminations may be 90° elbows if specified by local
requirements. Note: The vertical centerline of the air intake
termination and the vertical centerline of the exhaust vent
termination must not be closer than 8”.
Important: Elbows (excluding the termination elbow) and
risers must be considered when calculating total equivalent
vent length (see Table 4).
EXH
A
TERM UST
INAL
should not interfere with it. Once the pilot hole is drilled,
place the intake pipe in position and secure in place using
a #8 screw. Do not use glue to secure this joint in order
to allow the restrictive screen to be removed for cleaning.
The screen in the exhaust piping should be located close
to the blower (see Figure 24 & Figure 25) and all exhaust
piping joints should be glued.
90° ELBOW
(SEE INSET)**
2” AIR
INTAKE PIPE
2” VENT
PIPE
VENT
SCREEN
SCREW*
VENT
SCREEN
3” TO 2”
REDUCER
12”
PREFERRED
LENGTH
AIR DUCT
ADAPTER
BLOWER
8” M
IN
.
VEN
SCR T
EE
INSID N
E
* ALLOWS PARTIAL DISASSEMBLY OF VENTING TO CLEAN THE SCREEN.
** OPTIONALLY THE 90° ELBOW MAY BE A SOUND SUPPRESSOR.
CONFIGURATION FOR HEATERS CONNECTED TO 2" VENTING.
PARTIALLY EXPLODED VIEW TO SHOW VENT SCREEN LOCATION.
Figure 24.
WAL
MOU L
N
SUP TED
POR
T
BRA
CKE
T
INTA
TERM KE
INAL
24”M
90° ELBOW
(SEE INSET)**
AX.
3” AIR
INTAKE PIPE
3” VENT
PIPE
VENT
SCREEN
ABO
VE S
NOW
ACC
U
LEVE MULATIO
N
L OR
ABO
VE G 12” MIN.
RAD
E.
VEN
SCR T
EEN
Figure 23.
If the installation requires restrictive screens and is
susceptible to ice accumulation on the intake terminal, the
restrictive screens should be installed near the blower as
shown in Figure 24 and Figure 25. If the restrictive screens
are installed near the blower, it is recommended that debris
screens be installed at the terminations.
These debris screens (see Figure 3) may be removed
while there is a risk of ice accumulation but this can
make the air intake susceptible to debris buildup, the
entry of birds, other small animals or rodents. If the debris
screens are removed to prevent ice accumulation, it is
recommended that they be re-installed when the risk of
ice accumulation has passed.
SCREW*
VENT
SCREEN
12”
PREFERRED
LENGTH
AIR DUCT
ADAPTER
BLOWER
* ALLOWS PARTIAL DISASSEMBLY OF VENTING TO CLEAN THE SCREEN.
** OPTIONALLY THE 90° ELBOW MAY BE A SOUND SUPPRESSOR.
CONFIGURATION FOR HI-INPUT HEATERS CONNECTED TO 3” VENTING.
PARTIALLY EXPLODED VIEW TO SHOW VENT SCREEN LOCATION.
Figure 25.
The restrictive screen and the air intake piping should be
secured in place to the reducer or air duct adaptor with a
screw (see Figure 24 and Figure 25). To prevent damage
to the equipment, first position the restrictive screen and
air intake pipe in place, then drill a 7/64” pilot hole for a
#8 screw. The screen must be fully seated and the screw
26
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100228375
Tee Termination Installation
A Tee fitting as the exhaust termination and a 90° fitting
as the air intake termination are permitted on the water
heater models listed in Table 2.
Note: The sound suppressor must not be installed if the
Tee termination is installed.
WATER HEATER
MAX. EQUIV.
VENT
MODEL
VENT LENGTH
DIAM.
40gal, 40K Btu/Hr
50’
2”
50gal, 45K Btu/Hr
50’
2”
Table 2.
When a Tee termination is used, two additional vent
screens must be purchased and installed as seen in
Figure 26 and Figure 27. On installations of venting less
than 20’, a restrictive screen must be used. On installation
over 20’ a non restrictive screen must be used.
APP
LY
TO B SEALAN
OTH
T
OF W SIDES
ALL
8” M
IN
.
VEN
TS
- INS CREEN
T
TERM ALL IN
INAT
ION
“A” & “B”: ABOVE SNOW
ACCUMULATION LEVEL
OR 18” MIN. ABOVE
ROOF.
8” M
IN.
1”
INTA
K
VE E
TERMNT
INAL
1”
EXHAUST
VENT
TERMINAL
B
A
VENT SCREEN
- INSTALL IN
TERMINATIONS
Figure 28.
Roof Vent Terminal Installation
Important: When terminating the vents through a roof,
the following specifications pertaining to terminal location
must be followed (see Figure 29).
1”
IN.
TEE
FIT
EXH TING
TERM AUST
INAT
ION
90° E
LBO
W
AIR I
TERM NTAKE
INAT
ION
8” M
“A” & “B”: ABOVE SNOW
ACCUMULATION LEVEL
OR 18” MIN. ABOVE
ROOF.
VEN
TS
- INS CREEN
TERM TALL IN
INAT
IONS
INTA
K
VE E
TERMNT
INAL
1”
EXHAUST
VENT
TERMINAL
12” M
IN.*
B
A
*OR ABOVE ANTICIPATED
SNOW LEVEL ACCUMULATION
Figure 26.
Figure 29.
WAL
VEN
SUP L MOUN
TS
POR
T
(INST CREEN
T BR ED
ACK
TERM ALL IN
ET
INAT
ION)
8” M
IN
TEE
FIT
EXH TING
TERM AUST
INAT
ION
VEN
T SC
(INST REEN
TERM ALL IN
INAT
ION)
90° E
L
AIR I BOW
TERM NTAKE
INAT
ION
VEN
TS
(INST CREEN
TERM ALL IN
INAT
ION)
.
APP
L
SEA Y
LA
TO B NT
O
SIDE TH
S OF
WAL
L
24”M
AX.
1. The air intake termination and the exhaust vent
termination shall extend above anticipated snow level
or at least 18” above the roof.
2. Must provide proper support for all pipes protruding
through roof.
3. The vertical roof terminations should be sealed with a
plumbing roof boot or equivalent flashing.
4. The air intake termination and the exhaust vent
termination must penetrate the same side of roof.
5. The centerline of the air intake termination and the
centerline of the exhaust vent termination must not
be closer than 8”.
6. The air intake terminal and the exhaust vent terminal
must be oriented facing downward and the same
direction.
12” M
IN.*
*OR ABOVE ANTICIPATED
SNOW LEVEL ACCUMULATION
Figure 27.
100228375
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27
Concentric Vent Termination Installation
A concentric vent termination kit (see Table 3) may be
used for vertical or horizontal terminations. Figure 30
illustrates the concentric vent kit for a horizontal (side wall)
installation. To prevent rain water from entering the exhaust
outlet, slope the vent kit at a downward pitch of 1/4” per
5’ away from the inside wall. Ensure the combustion
air intake location is above the anticipated snow level.
Figure 31 illustrates the concentric vent termination kit
in a vertical (roof) installation. Ensure the combustion air
intake location is above the anticipated snow level.
VENT DIA.
45° ELBOW
(SEE LOCAL
CODES)
PIPE NIPPLE
VENT SCREEN
INSIDE
COMBUSTION
AIR
ABOVE SNOW
ACCUMULATION
LEVEL OR 18” MIN.
ABOVE ROOF.
ROOF
P/N
2”
9008586005
3”
9006328005
Table 3.
FLASHING (FIELD
SUPPLIED)
STRAP (FIELD
SUPPLIED)
ELBOW (FIELD
SUPPLIED)
COMBUSTION
AIR
EXHAUST
Figure 31.
ORIENTATION OF EXHAUST PIPING AND COMBUSTION AIR PIPING RELATIVE
TO EACH OTHER MAY BE VERTICAL (AS SHOWN) OR AT ANY OTHER ANGLE
TO SUIT THE INSTALLATION.
STRAP (FIELD
SUPPLIED)
COMBUSTION
AIR
PIPE NIPPLE (USE
WITH ELBOW)
90° ELBOW
(SEE LOCAL
CODES)
EXHAUST
SLOPE 1/4” OVER 5’
COMBUSTION
AIR
1” MAXIMUM
WALL
ELBOW (FIELD
SUPPLIED)
VENT SCREEN
INSIDE
Figure 30.
28
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100228375
Multiple Concentric Vent Installation
When two concentric vent kits are being installed, the vent
hood centers shall be either less than 9.5” apart or more
than 43.5” apart. Spacings between 9.5” and 43.5” are not
allowed due to the possibility of exhaust cross circulation
(see Figure 32).
When more than 2 kits are installed only 2 of them shall
be less than 9.5” apart. Never install 3 termination kits
together less than 9.5” apart (see Figure 33).
WALL
OR
9.5” MAX
43.5” MIN
VENT SCREEN
NOTE: IF AN
ELBOW IS
REQUIRED
BY LOCAL
CODES
INSTALL
SCREEN
IN ELBOW
INSTEAD OF
CONCENTRIC
VENT
EXHAUST.
Figure 32.
NOTE: IF AN ELBOW IS REQUIRED BY
LOCAL CODES INSTALL SCREEN IN ELBOW
INSTEAD OF CONCENTRIC VENT EXHAUST.
43.5” MIN.
9.5” MAX..
VENT
SCREEN
WALL
Figure 33.
Vent Pipe Material
This heater is certified to be installed using Schedule
40 PVC or CPVC or polypropylene or ABS plastic vent
material for the exhaust. The combustion air intake material
may be PVC, ABS, CPVC or polypropylene. Check local
codes to determine which materials are allowed in your
area and only use approved material. All venting material
and components must be joined with the approved primer/
cleaner and solvent cement. Do not cement the venting
system to the heater. For polypropylene vent systems
follow manufacturer’s instructions. Note: Polypropylene
vent systems require separate adaptor, termination,
and elbows (field supplied). It is recommended to use
InnoFlue® SW Residential products from Centrotherm
(www.centrotherm.us.com).
Note: Use only solid (not foam core) piping. Plastic pipe
and fittings are available through most plumbing suppliers.
Always check the marking on the pipe to make sure you are
using the correct material. Use of cellular core PVC (ASTM
100228375
F891), cellular core CPVC, or Radel® (polyphenolsulfone)
in non-metallic venting systems is prohibited.
Polypropylene Vent Systems
Polypropylene vent systems do not use cement to connect
the pipe and elbow sections but use a push together gasket
seal method. Do not attempt to connect polypropylene
with sealant cement.
Polypropylene vent systems are designed to use specific
adaptors to connect into the rubber coupling on the top
of the blower. These are available through your venting
supplier.
The PVC vent termination elbow supplied with this heater
has been certified to be used with polypropylene vent
systems. A polypropylene to PVC end connection is
required and is available through your supplier.
Optional wall plates that fit the polypropylene venting are
also available through your supplier.
Carefully inspect the entire venting system for any signs of
cracks or fractures, particularly at joints between elbows
and other fittings and straight runs of vent pipe. Check
system for signs of sagging or other stresses in joints as a
result of misalignment of any components in the system. If
any of these conditions are found, they must be corrected
in accordance with the venting instructions in this manual
before completing installation and putting the water heater
into service.
The vent piping shall be connected to the blower with
the rubber coupling and secured with gear clamps. The
coupling and clamps are provided with the heater.
Even though the flue gas temperature leaving the blower
is hot, some installations will have water condense in
the vent piping. If this occurs, then adequate means of
draining and disposing of the condensate shall be made
by the installer.
Vent Pipe Length And Sizing
Refer to Table 4 for vent pipe materials and sizing. If the
installation requires a vent riser, suitable drainage must
be provided to ensure condensation does not accumulate
(see Figure 43). The specified maximum lengths are for
each of the intake and exhaust systems and not for the
combined lengths of both systems. Minimum pipe length
is 2’ with a minimum of one 90° elbow per side (intake
and exhaust).
1. Determine termination type and pipe size.
2. Determine number of elbows in vent system. Do not
include termination elbow. Calculate the maximum
equivalent length of the exhaust and air intake system.
90° SHORT SWEEP ELBOW
(MORE RESTRICTIVE)
www.americanwaterheater.com
90° LONG SWEEP ELBOW
(LESS RESTRICTIVE)
Figure 34.
29
VENT
WATER HEATER
SIZE
HEATER INPUT
(Inside
MODEL (Btu/hr)
Diam.)
40 gal.
PRESSURE
SWITCH
SETTINGS (“ w.c.)
2 PIPE MAX.
EQUIV. VENT
LENGTH
N.O.
N.C.
2”
-0.32
-2.12
50’ + term. elbow
and screen*
3”
-0.32
-2.12
125’ + term. elbow
and screen*
-1.25
-1.42
-1.35
-1.66
-1.25
-1.42
-0.32
-2.12
-1.25
-1.42
62,000
-1.35
-1.66
76,000
-1.25
-1.42
40,000
50 gal
45,000
40 gal.
40,000
50 gal
45,000
50 gal.
58,000
(L.P.)
62,000
3”
2 PIPE
MIN. EQUIV.
VENT LENGTH
7’ + term. elbow
and screen*
CONC. VENT
MAX. EQUIV.
VENT LENGTH
50’ + term. elbow
and screen*
CONC. VENT
MIN. EQUIV.
VENT LENGTH
7’ + term. elbow
and screen*
100’ + term. elbow
and screen*
7’ + term. elbow
and screen*
50’ + term. elbow
and screen*
7’ + term. elbow
and screen*
30’ + term. elbow
and screen*
75 gal.
76,000
40 gal.
40,000
50 gal
45,000
50 gal.
58,000
(L.P.)
4”
180’ + term. elbow
and screen*
50’ + term. elbow
and screen*
N/A
N/A
125’ + term. elbow
and screen*
75 gal.
* see Figure 36 and Figure 37
Equivalent lengths of straight pipe for various elbows using Schedule 40 PVC, CPVC, ABS, and polypropylene.
Vent
Pipe
Size
Short
Elbow
Sweep/
Type
Radius
Long Notes:
Sweep/ 1. Vent lengths shown do not include vent termination elbow.
Radius 2. A horizontal vent must have a 45° or 90° vent termination elbow to direct the vent pipe
2”
3"
4"
90°
8’
5’
2”
3"
4"
45°
4’
2.5’
downward unless otherwise specified by local requirements.
3. A vertical vent must have a 90° elbow to direct the vent pipe horizontally followed by a
vent termination 45° elbow to direct the vent pipe downward unless otherwise specified
by local requirements.
4. If additional elbows are used in the vent system the allowable vent lengths are reduced.
5. Two 45° elbows are considered the equivalent of one 90° elbow.
6. The equivalent length of the sound suppressor is 15’.
Table 4.
Use the appropriate vent termination screen as shown in Figure 36 & Figure 37. Install the vent termination screen in
both the air intake pipe and the exhaust pipe.
30
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100228375
Vent Screens
This water heater includes one (1) pair of more restrictive
vent screens and one (1) pair of less restrictive vent
screens (see Figure 36 & Figure 37). For safety and
optimum efficiency performance, ensure the correct vent
screen is installed for the vent length in your installation.
A vent screen is required to keep foreign objects, rodents
and small birds from entering the venting system.
These screens have been sized to ensure maximum
energy efficiency of the vent system based on the
“equivalent length” of the vent piping. CHOOSE ONLY
the ONE SCREEN THAT MATCHES YOUR VENTING
CONFIGURATION (see Figure 36 & Figure 37). The vent
screen MUST be installed for proper operation of the
water heater. How to determine the “equivalent length” is
shown in Table 4.
For heater models 40-40 & 50-45
with 2” venting (short)
with 2” venting (long)
VENT LENGTH LESS THAN OR
EQUAL TO 20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
VENT LENGTH GREATER THAN
20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
with 3” venting
with 4” venting
FOR ALL LENGTHS OF VENTING
USE THIS SCREEN (SUPPLIED).
VENT LENGTH GREATER THAN
125 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
• Supplied with this heater are several vent screens (see
Figure 36 & Figure 37).
• Install the appropriate vent screen into the vent
termination elbow.
• Gently push the screen into the termination elbow until
it sits against the inside shoulder.
• The metal wire screens are self-securing.
• Plastic screens must be secured with two (2) corrosion
resistant sheet metal screws as shown in Figure 35.
This will allow for easy removal for inspection and
cleaning.
Note: Before installing the Power Direct Vent Water
Heater, it is recommended that the location of the pipe
terminations (air intake and exhaust vent) be determined.
PLASTIC
SCREEN
SHOULDER
POCKETS
FACING OUT
#6 SHEET
METAL
SCREW
#6 SHEET
METAL
SCREW
(FIELD
SUPPLIED)
Figure 36.
Note: The same screens should be installed in the intake
and the exhaust piping. These screens are supplied in the
vent kit. In the concentric vent application, the screen is
to be installed in the exhaust piping only.
Important: Failure to install the appropriate screen in the
vent system could result in improper heater operation with
attendant risk of property damage, personal injury or death
by fire or carbon monoxide poisoning.
CLOSED
POCKET
OPEN
POCKET
ELBOW
Figure 35.
100228375
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31
For heater models 50-58, 50-62, 75-72 & 75-76
with 3” venting (short)
VENT LENGTH LESS THAN OR
EQUAL TO 20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
with 3” venting (long)
VENT LENGTH GREATER THAN
20 EQUIVALENT FT.
USE THIS SCREEN (SUPPLIED).
with 4” venting
Do not use solvent cement to connect the exhaust vent
system to the blower. Use the rubber coupling and gear
clamps instead. This connection must be removable to
service the heater. All other joints in the exhaust vent
system must be properly cemented.
Note: If a vent screen in the air intake vent system is
located at the blower, this joint should not be cemented
but secured with a screw to allow servicing (see
Figure 24 & Figure 25).
Vent Pipe Runs
1. The exhaust vent system must not, under any
circumstances, be run downhill then run uphill thus
forming a valley. It may leave a space to accumulate
condensation and block vent pipe.
2. Horizontal runs require a minimum 1/8” rise per
5’ and a support every 4’ or according to venting
manufacturer’s instructions. Ensure there is enough
height between heater and termination to raise vent
pipe runs the required distance.
3. Vertical runs require a support every 5’ that must
provide proper support to prevent stress on the pipes
or according to venting manufacturer’s instructions.
VENT LENGTH GREATER THAN
50 EQUIVALENT FT. USE THIS
SCREEN (SUPPLIED).
Figure 37.
Vent Pipe Installation
The following guidelines should be followed when installing
the air intake and exhaust vent system:
• Venting should be as direct as possible with a minimum
number of pipe fittings.
• Vent diameter must not be reduced unless specifically
noted in the installation instructions.
• Support all horizontal pipe runs every 4’ and all vertical
pipe runs every 5’ or according to local codes or venting
manufacturer’s instructions.
• Vents run through unconditioned spaces where
below freezing temperatures are expected, are not
recommended.
• Vents run through unconditioned spaces inside a
building may result in the condensation of flue gases
during the winter season. The rubber coupling joined to
the blower includes a nipple with a cap. In installations
such as this connect a condensation trap to this nipple.
The combustion air intake and exhaust vent system and
termination may be installed in one of the following type
terminations:
1. Horizontal (2 Pipe) (air intake and exhaust vent)
2. Vertical (2 Pipe) (air intake and exhaust vent)
3. Concentric Vent Termination (horizontal/side wall
installation).
4. Concentric Vent Termination (vertical/roof installation).
32
All pipe, fittings, pipe cement, primers and procedures
must conform to American National Standard Institute and
American Society for Testing and Materials (ANSI/ASTM)
standards. This water heater has been design certified by
CSA International for use with the specified (CSA) listed
plastic vent pipe.
Vent Terminal Installations
Important: The vent system must terminate so that proper
clearances are maintained as cited in local codes or the
latest edition of “National Fuel Gas Code”, ANSI Z223.1/
NFPA 54.
Plan the vent system layout so that proper clearances are
maintained from plumbing and wiring. Vent pipes serving
power vented appliances are classified by building codes as
“vent connectors”. Required clearances from combustible
materials must be provided in accordance with information
in this manual under ““Locating The New Water Heater”
and with the latest edition of “National Fuel Gas Code”,
ANSI Z223.1/NFPA 54 and local codes.
www.americanwaterheater.com
WARNING
Fire Hazard
• Primers and cements are
extremely flammable, and must
not be stored or used near heat
or open flame.
• Also, use only in a well ventilated area.
100228375
WARNING
WARNING
Fire Hazard
Fire or Explosion Hazard
• Cans of cement and primer should
be closed at all times when not in
use to prevent evaporation of
chemicals and hardening of cement.
• They are also very flammable and
should be kept away from heat or
flame.
• Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
• Avoid all ignition sources if you smell gas.
• Do not expose water heater control to excessive gas
pressure.
• Use only gas shown on rating plate.
• Maintain required clearances to combustibles.
• Keep ignition sources away from faucets after extended
period of non-use.
VENT PIPE PREPARATION
1. INITIAL PREPARATION
• Make sure the solvent cement you are planning to
use is designed for the specific application you are
attempting.
• Know the physical and chemical characteristics and
limitations of the PVC and CPVC piping materials
that you are about to use.
• Know the reputation of your manufacturer and their
products.
• Know your own qualifications or those of your
contractor. The solvent welding technique of joining
PVC and CPVC pipe is a specialized skill just as any
other pipe fitting technique.
• Closely supervise the installation and inspect the
finished job before start-up.
• Contact the manufacturer, supplier, or competent
consulting agency if you have any questions about
the application or installation of PVC and CPVC
pipe.
• Take the time and effort to do a professional job.
Shortcuts will only cause you problems and delays
in start-up. By far, the majority of failures in PVC
and CPVC systems are the result of shortcuts and/
or improper joining techniques.
2. SELECTION OF MATERIALS (PVC and CPVC
VENTING)
• Cutting Device - Saw or Pipe Cutter
• Deburring Tool, Knife, File, or Beveling Machine (2”
and above)
• Brush - Pure Bristle
• Rag - Cotton (Not Synthetic)
• Primer and Cleaner
• Solvent Cement - PVC for PVC Components and
CPVC for CPVC Components only
• Containers - Metal or Glass to hold Primer and
Cement. Select the type of PVC or CPVC materials
to be used on the basis of their application with
respect to chemical resistance, pressure rating,
temperature characteristics, etc.
• Insertion Tool - Helpful for larger diameter pipe and
fittings 6” and above.
100228375
Read instruction manual before
installing, using or servicing
water heater.
Primer:
It is recommended that Tetrahydrofuran (THF) be
used to prepare the surfaces of pipe and fittings for
solvent welding. Do not use water, rags, gasoline
or any other substitutes for cleaning PVC or CPVC
surfaces. A chemical cleaner such as MEK may
be used.
Cement:
PVC Materials should use ASTM D-2564 Grade
Cement; CPVC Materials should use ASTM F-493
Grade Cement and ABS Materials should use
ASTM D-2235 Grade Cement. Select the proper
cement; Schedule 40 cement should be used for
Schedule 40 pipe. Never use all-purpose cements,
commercial glues and adhesives or ABS cement
to join PVC or CPVC pipe and fittings.
.
WARNING
Fire Hazard
• Primers and cements are
extremely flammable, and must
not be stored or used near heat
or open flame.
• Also, use only in a well ventilated area.
Applicators:
Select a suitable pure bristle type paint brush.
Use a proper width brush or roller to apply the
primer and cement (see chart below). Speedy
application of cement is important due to its fast
drying characteristics. IMPORTANT NOTE: A
dauber type applicator should only be used on
pipe sizes 2” and below. For larger diameter pipe,
a brush or roller must be used.
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33
RECOMMENDED BRUSH* SIZE FOR
PRIMER AND CEMENT APPLICATIONS
Nominal
Pipe (IPS)
Brush Size
2
1.5”
3
1.5” - 2.5”
*USE ONLY NATURAL BRISTLE
Table 5.
3. MAKING THE JOINT
A. Cutting
Pipe must be squarely cut to allow for the proper
interfacing of the pipe end and the fitting socket
bottom. This can be accomplished with a miter box
saw or wheel type cutter. Wheel type cutters are
not generally recommended for larger diameters
since they tend to flare the corner of the pipe end.
If this type of cutter is used, the flare on the end
must be completely removed.
Note: Power saws, if used, should be specifically
designed to cut plastic pipe.
Figure 38.
B. Deburring
Use a knife, plastic pipe deburring tool, or file to
remove burrs from the end of small diameter pipe.
Be sure to remove all burrs from around the inside
as well as the outside of the pipe. A slight chamfer
(bevel) of about 10°-15° should be added to the
end to permit easier insertion of the pipe into the
end of the fitting. Failure to chamfer the edge of the
pipe may remove cement from the fitting socket,
causing the joint to leak.
C. Test dry fit of the joint
Tapered fitting sockets are designed so that
an interfaced fit should occur when the pipe is
inserted about 1/3 to 2/3 of the way into the socket.
Occasionally, when pipe fitting dimensions are at
the tolerance extremes, it will be possible to fully
insert dry pipe to the bottom of the fitting socket.
When this happens, a sufficient quantity of cement
must be applied to the joint to fill the gap between
the pipe and fitting. The gap must be filled to obtain
a strong, leak-free joint.
D. Inspection, cleaning, priming
Visually inspect the inside of the pipe and fitting
sockets and remove all dirt, grease or moisture
with a clean dry rag. If wiping fails to clean the
surfaces, a chemical cleaner must be used. Check
for possible damage such as splits or cracks and
replace if necessary.
Depth-of-entry
Marking the depth of entry is a way to check if the
pipe has reached the bottom of the fitting socket
in Step F. Measure the fitting depth and mark this
distance on the pipe O.D. You may want to add
several inches to the distance and make a second
mark as the primer and cement will most likely
destroy your first one.
Apply primer to the surface of the pipe and fitting
socket with a natural bristle brush. This process
softens and prepares the PVC or CPVC for the
solvent cementing step. Move quickly and without
hesitation to the cementing procedure while the
surfaces are still wet with primer.
E. Application of solvent cement
• Apply solvent cement evenly and quickly
around outside of pipe at a width a little
greater than the depth of the fitting socket.
• Apply a light coat of cement evenly around
the inside of the fitting socket. Avoid puddling.
• Apply a second coat of cement to the pipe
end.
WARNING
Fire Hazard
• Cans of cement and primer should
be closed at all times when not in
use to prevent evaporation of
chemicals and hardening of cement.
• They are also very flammable and
should be kept away from heat or
flame.
Figure 39.
34
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100228375
Figure 40.
F.
Joint assembly
Working quickly, insert the pipe into the fitting
socket bottom and give the pipe or fitting a 1/4 turn
to evenly distribute the cement. Do not continue
to rotate the pipe after it has hit the bottom of
the fitting socket. A good joint will have sufficient
cement to make a bead all the way around the
outside of the fitting hub. The fitting will have a
tendency to slide back while the cement is still wet
so hold the joint together for about 15 seconds.
Figure 41.
G. Cleanup and joint movement
Remove all excess cement from around the pipe
and fitting with a dry cotton rag. This must be done
while the cement is still soft.
The joint should not be disturbed immediately
after the cementing procedure, and sufficient time
should be allowed for proper curing of the joint.
Exact drying time is difficult to predict because
it depends on variables such as temperature,
humidity and cement integrity. For more specific
information, you should contact your solvent
cement manufacturer.
BLOWER ASSEMBLY INSTALLATION
1. This power vented water heater comes with blower
assembly installed.
2. After unit is set in place, make sure blower assembly is
still mounted securely. Make sure there is no damage
to blower.
3. Make sure there is no packing material in the inlet or
discharge of the blower.
4. Make sure that the plastic tubing is still attached from
the air pressure switch to the port on the blower motor
housing. Make sure the plastic tubing is not folded
anywhere between the pressure switch and the blower
motor housing (see Figure 44 thru Figure 48).
5. This water heater is a polarity sensitive appliance and
will not operate if the power supply polarity is reversed.
Power to this water heater must be wired properly
(correct polarity).
6. Do not plug in power cord until vent system is
completely installed. The Power Direct Vent operates
on 110 -120 VAC. therefore a grounded outlet must be
within reach of the 6 foot flexible power cord supplied
with the heater. The power cord supplied may be used
on a unit only where local codes permit. If local codes
do not permit use of flexible power supply cord:
a. Make sure the unit is unplugged from the wall
outlet. Remove the screw and open panel on the
front of the junction box on the blower.
b. Cut the flexible power cord, leaving enough to
be able to make connections. Remove the strain
relief fitting from the box.
c. Install a suitable conduit fitting inside the
enclosure.
d. Splice field wiring into existing wiring using code
authorized method (wire nuts, etc).
e. Be certain that the neutral and line connections
are not reversed when making these connections.
f. Ground heater properly. This water heater must
be grounded in accordance with the current
edition of “National Electrical Code”, NFPA 70
and/or local codes. These must be followed in
all cases. The water heater must be connected
to a grounded metal, permanent wiring system
or an equipment grounding conductor must be
run with the circuit conductors and connected to
the equipment grounding terminal or lead on the
water heater (see Figure 12; the wiring diagram).
g. Close the panel on the junction box. Make sure
that the access panel is secured shut.
7. The blower discharge has a rubber coupling made to
accept only straight sections of 2” or 3” pipe. To start
off with an elbow, a short section of the straight pipe
must be cut and glued into the end of the elbow that
will mount in the rubber coupling.
Figure 42.
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Connections To The Blower And Air Duct
1. The plastic vent piping connects into the rubber
coupling located on the top of the blower assembly.
This coupling includes gear clamps to connect the
venting to the blower.
Important: These connections must be properly seated
and tightened to prevent the leakage of flue gases into the
area. See Figure 44 thru Figure 48.
2. The 40 and 50-gallon heaters with rated inputs of 45k
Btu/hr or less are designed and supplied with a 2”
rubber coupling to accept the vent pipe.
3. The 50 and 75-gallon models with rated inputs of 58k
Btu/hr or more are supplied with a 3” rubber coupling
to accept the vent pipe. Note: Polypropylene vent
systems require separate adaptor (field supplied).
4. Before installing clean and lightly sand the end of the
ABS/PVC/CPVC plastic vent piping that will connect
into the rubber coupling. For polypropylene vent
systems follow manufacturer’s instructions.
5. Loosen the upper clamp on the rubber coupling and
insert the sanded end of the vent piping a full 1-1/4”.
Do not use glue or sealant in the rubber coupling.
Check that there is no stress on the connection or the
vent piping that may be caused by twisting or bending.
6. Tighten the upper clamp so that the vent piping is
firmly secured in the coupling and is gas tight. Do not
over tighten or cause distortion of any of the parts.
Ensure the bottom of the rubber coupling is firmly
seated on the blower outlet and that the lower gear
clamp is also secure. Check to ensure there is no
distortion or movement of the clamped assembly once
it is completed.
2” INLET
PIPE
2” VENT
PIPE
2”-3”
ADAPTER
(SUPPLIED)
2” RUBBER
COUPLING
(SUPPLIED)
3” PIPE
(SUPPLIED)
BLOWER
AIR DUCT
ADAPTER
CONFIGURATION FOR 40 AND 50 GALLON (LO-INPUT) HEATERS
CONNECTED TO 2" VENTING.
Figure 44.
3” VENT
PIPE
2”-3”
ADAPTER*
(FIELD
SUPPLIED)
3” INLET PIPE
2” VENT
PIPE, 3” MAX
LENGTH
2” RUBBER
COUPLING
(SUPPLIED)
AIR DUCT
ADAPTER
BLOWER
CONFIGURATION FOR 40 AND 50-GALLON (LO-INPUT) HEATERS
CONNECTED TO 3” VENTING.
* FOR 3” DIRECT CONNECTION TO THE BLOWER, ORDER COUPLING
Kit # 9008311005 (SEE ALSO Figure 47).
CAUTION
Figure 45.
4” VENT
PIPE
Property Damage Hazard
• Do not overtighten the top and bottom gear clamps of the
rubber coupling.
• Do not apply solvent cement or silicone to the rubber
coupling connection.
8”
CONDENSATE
LOOP
(INTAKE)
4” INLET PIPE
3”-4”
ADAPTER (FIELD
SUPPLIED)
3” VENT PIPE, 3” MAX
LENGTH
3” RUBBER
COUPLING
(ORDER COUPLING
Kit # 9008311005
TO REPLACE 2”
RUBBER COUPLING
SUPPLIED.)
3” PIPE
(SUPPLIED)
BLOWER
AIR DUCT
ADAPTER
BLOWER
ASSEMBLY
8”
CONDENSATE
LOOP
(EXHAUST)
HOSE CONNECTION
PORT FOR
CONDENSATE DRAIN
CONFIGURATION FOR LO-INPUT HEATERS CONNECTED TO 4”
VENTING.
LOW-INPUT HEATERS ARE SUPPLIED WITH A 2” RUBBER COUPLING.
Figure 46.
TO DRAIN
Figure 43.
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3” INLET PIPE
3” VENT
PIPE
3” RUBBER
COUPLING
(SUPPLIED)
BLOWER
AIR DUCT
ADAPTER
CONFIGURATION FOR HI-INPUT HEATERS CONNECTED TO 3”
VENTING.
(OPTIONAL CONFIGURATION FOR LO-INPUT HEATERS CONNECTED TO
3” VENTING.)
Figure 47.
4” VENT
PIPE
4” INLET PIPE
3”-4”
ADAPTER (FIELD
SUPPLIED)
3” VENT PIPE, 3” MAX
LENGTH
3” RUBBER
COUPLING
(SUPPLIED.)
3” PIPE
(FIELD
SUPPLIED)
BLOWER
AIR DUCT
ADAPTER
CONFIGURATION FOR HI-INPUT HEATERS CONNECTED TO 4”
VENTING.
Figure 48.
CONDENSATE (EXHAUST)
In certain conditions, installations in unconditioned
space or having long horizontal or vertical vent runs can
accumulate condensate. Long lengths of venting that pass
through cool/cold areas will experience condensation. The
vent pipe should be sloped upwards away from the blower
assembly, then adequate means for draining and disposing
of the condensate needs to be made by the installer.
Condensate formation does not occur in all installations of
power direct vented water heaters, but should be drained
on installations where it can form in the venting system.
Condensation in the venting system of power direct vented
water heaters is dependent upon installation conditions
including, but not limited to:
• ambient temperature and humidity of installation
location,
• ambient temperature and humidity of venting space,
• vent discharge and slope,
• product usage.
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If installation conditions cause condensation, install a
condensate trap loop approximately 8” in diameter using
3/8” plastic hose. Connect the hose to the built-in drain
port of the rubber coupling of the blower assembly (see
Figure 43). Loop the hose in a vertical position as shown.
The tube loop must be filled with water at least halfway
prior to operating the heater. Ensure the end of the tube
has access to a drain as condensate will flow from the end.
Secure the tubing to the side of the heater. Caution must
be used to ensure that drain is free and clear of debris and
will not allow backflow through the condensate drain line.
Care should be taken to ensure there is no kink or twist
in the condensate hose.
• Condensate lines must be free and clear of debris and
must not allow back flow through drain line.
• Condensate lines must be able to flow freely to an
appropriate drain.
• Do not allow condensate lines to become crimped
closed.
• Analyze entire vent system to make sure that
condensate will not become trapped in a section of
vent pipe and therefore reduce open cross sectional
area of vent.
Condensate from this water heater is mildly acidic. Please
note that some local codes require that condensate be
treated by using a pH neutralizing filter prior to disposal.
Condensate neutralizer kits are available. Contact your
distributor or Service Agency.
Prior to operating the water heater, make sure the
removable cap is installed on the drain port in installations
where a drain hose is not needed. Note: This cap must
remain in place if a drain hose is not installed.
CONDENSATE (INTAKE)
The air intake piping in a direct vent system will normally
not have any moisture accumulation in it. However, in
certain cases, moisture may build up and needs to be
drained. Typical situations include, but are not limited to:
• cold outdoor temperature, particularly if the air inlet
is short,
• high outdoor humidity,
• heater being used mostly for space heating and
• air inlet pipe has vertical rise near the heater.
Installations with any of these conditions are required to
provide a moisture drain with a trap that flows to a waste
drain (see Figure 43). A horizontal section of the air inlet
pipe, near the heater should include a suitable tee and a
hose barb fitting to drain the water. The tee should be as
close to the heater as is practical. install a condensate trap
loop approximately 8” in diameter using 3/8” plastic hose.
Connect the hose to the tee. Loop the hose in a vertical
position as shown Figure 43 and flow to an appropriate
waste drain. The air intake drain line must be entirely
separate from the exhaust vent outlet condensate line.
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SOUND SUPPRESSOR (OPTIONAL)
The sound suppressor can reduce the noise generated
by the water heater heard outside. Depending on the
configuration of the water heater, the sound suppressor
will be either a 2” or a 3” fitting (see Table 6). The sound
suppressor can be fitted to the venting near the blower
assembly (see Figure 49 and Figure 50). The sound
suppressor has an equivalent vent length of 15’.
Venting size
Sound suppressor kit #
2”
9009046005
3”
9009059005
Table 6.
Sound Suppressor At Blower
The preferred location for the Sound Suppressor is 12”
away from the blower as shown in Figure 49 and Figure 50
and serves as the first 90° elbow. If restrictive vent screens
are required, they may be located near the blower (see
Figure 24 & Figure 25).
2” SOUND
SUPPRESSOR
2” VENT
PIPE
12”
PREFERRED
LENGTH
BLOWER
AIR DUCT
ADAPTER
CONFIGURATION FOR HEATERS CONNECTED TO 2" VENTING.
Figure 49.
3” SOUND
SUPPRESSOR
3” VENT
PIPE
12”
PREFERRED
LENGTH
BLOWER
AIR DUCT
ADAPTER
CONFIGURATION FOR HI-INPUT HEATERS CONNECTED TO 3” VENTING
WITH SOUND SUPPRESSION TEE FITTING.
Figure 50.
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INSTALLATION CHECKLIST
Note: Use and complete this checklist before lighting the
heater. Correct any conditions that do not meet these
instructions.
Water Heater Location
 Centrally located with the water piping system.
Located as close to gas piping and vent pipe system
as possible.

Located indoors and in a vertical position. Protected
from freezing temperatures.

Proper clearances from combustible surfaces maintained and not installed directly on a carpeted floor.

Provisions made to protect the area from water
damage. Metal drain pan installed and piped to an
adequate drain.

Installation area free of corrosive elements and flammable material.

Sufficient room to service the water heater.
Gas Supply And Piping
 Gas supply is the same type as listed on the water
heater data plate.

Gas line equipped with shut-off valve, union and
sediment trap.



Approved pipe joint compound used.
Adequate pipe size and of approved material.
Chloride-free soap and water solution or other
approved means used to check all connections and
fittings for possible gas leaks.
Vent Pipe System
 Vent pipe and fittings of approved material.

Acceptable size, length and number of elbows on
exhaust vent system.

Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the latest
edition of “National Fuel Gas Code”, ANSI Z223.1/
NFPA 54.

Horizontal piping slopes at an upward pitch of 1/8”
rise per 5’ away from the water heater.


Not obstructed in any way.
Vent Termination
Horizontal
 12” min. above grade/snow level.

Away from corners, other vents, windows etc.
Vertical
 Air Intake and Exhaust terminations 18” min. above
roof/snow level.
Water System Piping
 Temperature and Pressure relief valve properly
installed with a discharge line run to an open drain
and protected from freezing.



All piping properly installed and free of leaks.
Heater completely filled with water.
Closed system pressure build-up precautions
installed.
Electrical Connections
 Unit connected to a 120V electrical supply. A dedicated circuit is preferred. Do not use a GFI outlet.



Proper polarity.
Water heater properly grounded.
Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the latest
edition of “National Electrical Code” (NFPA 70)”.
After all actions on checklist are checked/
completed, read the Lighting Instructions and
proceed with lighting the heater.
Means installed to collect, neutralize (if required) and
dispose of condensate.
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LIGHTING INSTRUCTIONS
Read and understand these directions thoroughly before
attempting to operate the water heater. Make sure the
burner viewport is not missing or damaged. Make sure
the tank is completely filled with water before operating
the water heater. The gas control valve/thermostat has an
“On/Off Switch” and must be turned on before the water
heater is operational. Check the label on the front of the
water heater near the gas control valve/thermostat for
the correct gas. Do not start this water heater with any
gas other than the one listed on the label. If you have any
questions or doubts, consult the gas supplier or gas utility
company. The following Lighting Instruction label appears
on the front of the water heater.
This heater is equipped with a Honeywell gas control/
thermostat and a hot-surface igniter. This control is a
combination gas valve, thermostat and ignition controller
for use on this power vented water heater. The valve
contains a micro-controller that supervises the ignition
sequence and monitors the temperature settings and
operation of the heater. The controller also monitors the
flammable vapor safety features of this heater.
This heater is equipped with a hot-surface ignition
system that automatically ignites the burner. Do not
attempt to light this heater manually with a match or
flame-producing device.
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: If you do not follow these instructions exactly, a fire
or explosion may result causing property damage, personal
FLAMMABLE
injury or loss of life.
BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES.
A. This appliance does not have a pilot. It is
• If you cannot reach your gas supplier, call the
equipped with an ignition device which
fire department.
automatically lights the burner. Do NOT try
C. Use only your hand to turn the gas control
to light the burner by hand.
buttons. Never use tools. If the control
B. BEFORE OPERATING smell all around the
buttons will not turn, don't try to repair them,
appliance area for gas. Be sure to smell next
call a qualified service technician. Force or
to the floor because some gas is heavier
attempted repair may result in a fire or
than air and will settle on the floor.
explosion.
WHAT TO DO IF YOU SMELL GAS:
D. Do not use this appliance if any part has
• Do not try to light any appliance.
been under water. Immediately contact a
• Do not touch any electric switch; Do not use
qualified installer or service agency to
any phone in your building.
replace a flooded water heater. Do not
• Immediately call your gas supplier from a
attempt to repair the unit. It must be
neighbor's phone. Follow the gas suppliers
replaced!
instructions.
OPERATING INSTRUCTIONS
1.
2.
3.
4.
5.
6.
STOP! Read the safety
information above on this
label.
Turn off all electric power to the
appliance.
Turn the thermostat
counter-clockwise
to the
lowest setting.
Set the switch on the control to
the “OFF” position.
Do not attempt to light manually.
Wait five (5) minutes to clear out
any gas. If you then smell gas, STOP!
Follow “B” in the safety information above on
this label. If you don't smell gas, go the next
step.
7. Turn on all electric power to
the appliance.
8. Set the switch on the control
to the “ON” position.
9. Turn thermostat to desired
setting.
DANGER Hotter water
increases the risk of
scald injury. Consult the
instruction manual before
changing temperature.
10. If the appliance will not operate, follow the
instructions “To Turn Off Gas To Appliance”
and call your service technician or gas
supplier.
TO TURN OFF GAS TO APPLIANCE
1. Turn the thermostat counter-clockwise
to the lowest setting.
2. Set the gas control switch to the “OFF” position.
3. Turn off electrical power to the appliance if service is to be performed.
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OPERATING THE TEMPERATURE CONTROL SYSTEM
It is recommended that lower water temperatures be used
to avoid the risk of scalding. It is further recommended,
in all cases, that the water temperature be set for the
lowest temperature which satisfies your hot-water needs.
This will also provide the most energy efficient operation
of the water heater.
Short repeated heating cycles caused by small hot-water
uses can cause a temperature increase of the hot water
by 20F° higher than the heater’s temperature settings. If
you experience this type of use you should consider using
lower temperature settings to reduce scald hazards.
Should overheating occur or the gas supply fails to shut
off, turn off the main manual gas shut off valve to the
appliance (see Figure 1).
DANGER
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled and are at highest
risk of scald injury.
Feel water before bathing or
showering.
HOT
BURN
Temperature limiting devices
such as mixing must be
installed when required by
codes and to ensure safe
temperatures at fixtures.
The water heater should be located in an area where
the general public does not have access. If a suitable
area is not available, a cover should be installed over the
thermostat to prevent tampering.
This water heater is equipped with an adjustable
thermostat to control water temperature (see Figure 51).
Hot water temperatures required for automatic dishwasher
and laundry use can cause scald burns resulting in serious
personal injury and/or death. The temperature at which
injury occurs varies with the person’s age and time of the
exposure. The slower response time of children, aged or
disabled persons increases the hazards to them. Never
allow small children to use a hot-water tap, or to draw their
own bath water. Never leave a child or disabled person
unattended in a bathtub or shower.
The hot setting shown on the dial is approximately 120°F.
This is a good starting point to set the temperature.
Setting the water heater temperature at 120°F will reduce
the risk of scalds.
The thermostat settings on the gas control valve are shown
in Figure 51.
The water temperature setting was factory set at the lowest
(VAC) temperature setting.
HOT WATER CAN SCALD:
Water heaters are intended to produce hot water.
Water heated to a temperature which will satisfy space
heating, clothes washing, dish washing, cleaning and
other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be
permanently injured by hot water than others. These
include the elderly, children, the infirm, or physically/
mentally handicapped. If anyone using hot water fits into
one of these groups or if there is a local code or state law
requiring certain temperature water at the hot-water tap,
then you must take special precautions. In addition to
using lowest possible temperature setting that satisfies
your hot water needs, a means such as a mixing valve,
should be used at hot-water taps used by these people
or at the water heater (see Figure 7 & Figure 8). Follow
manufacturer’s instructions for installation of the valves.
Before changing the factory setting on the thermostat, in
this manual, see Table 7.
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GAS CONTROL VALVE/THERMOSTAT
130°F
ON/OFF
SWITCH
TEMPERATURE
SETTING DIAL
140°F 150°F
120°F
110°F
155°F
70°F
Figure 51.
Approximate
Temperature
Temperature
Dial Setting
°F
Time to induce a 2nd
and 3rd Degree burn
to adult skin
VERY HOT
155
Less than 1 second
C
150
About 1.5 seconds
B
140
Less than 5 seconds
A
130
More than 30 seconds
HOT
120
More than 5 minutes
LOW
110
Normal shower temp
VAC
70
N/A
Table 7.
Note: The temperatures indicated are approximate. The
actual temperature of the heated water may vary.
The Vacation Setting (VAC) sets the controller at
approximately 70°F. This setting is recommended when
the water heater is not in use for a long period of time. This
effectively turns the controller temperature setting down to
a temperature that prevents the water in the water heater
from freezing while still conserving energy.
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100228375
FOR YOUR INFORMATION
START UP CONDITIONS
Condensation
Whenever the water heater is filled with cold water, some
condensate will form while the burner is ON. A water
heater may appear to be leaking when in fact the water is
condensate. This usually happens when:
a. A new water heater is filled with cold water for the
first time.
b. Burning gas produces water vapor in water heaters,
particularly high efficiency models where flue
temperatures are lower.
c. Large amounts of hot water are used in a short time
and the refill water in the tank is very cold.
Moisture from the products of combustion condense on
the cooler tank surfaces and form drops of water which
may fall onto the burner or other hot surfaces to produce
a “sizzling” or “frying” noise.
Because of the suddenness and amount of water,
condensate water maybe diagnosed as a “tank leak”.
After the water in the tank warms up (about 1-2 hours),
the condition should disappear.
Do not assume the water heater is leaking until there has
been enough time for the water in the tank to warm up.
An undersized water heater will cause more condensation.
The water heater must be sized properly to meet the
family’s demands for hot water including dishwashers,
washing machines and shower heads.
Excessive condensate maybe noticed during the
winter and early spring months when incoming water
temperatures are at their lowest.
Good venting is essential for a gas fired water
heater to operate properly as well as to carry away
products of combustion and water vapo r (see also
“Condensate (Exhaust)” section).
OPERATIONAL CONDITIONS
Smelly Water
Each water heater contains at least one anode rod for
corrosion protection of the tank. Certain water conditions
will cause a reaction between this rod and the water. The
most common complaint associated with the anode rod
is one of a “rotten egg smell” in the hot water. The smell
is a result of four factors which must all be present for the
odor to develop:
a. A concentration of sulfate in the supply water.
b. Little or no dissolved oxygen in the water.
c. A sulfate reducing bacteria which has accumulated
within the water heater (this harmless bacteria is
nontoxic to humans).
d. An excess of active hydrogen in the tank. This is
caused by the corrosion protective action of the anode.
Smelly water may be eliminated or reduced in some water
heater models by replacing the anode(s) with one of less
active material, and then chlorinating the water heater tank
and all water lines. Contact the local water heater supplier
or service agency for further information concerning an
Anode Replacement Kit and this chlorination treatment.
If the smelly water persists after the anode replacement
and chlorination treatment, we can only suggest that
chlorination or aeration of the water supply be considered
to eliminate the water problem.
Do not remove the anode leaving the tank unprotected.
By doing so, all warranty on the water heater tank is
voided.
“AIR” IN HOT-WATER FAUCETS
WARNING
Smoke/Odor
It is not uncommon to experience a small amount of smoke
and odor during the initial start-up. This is due to burning off
of oil from metal parts, and will disappear in a short while.
Strange Sounds
Possible noises due to expansion and contraction of some
metal parts during periods of heat-up and cool-down do
not necessarily represent harmful or dangerous conditions.
Condensation causes sizzling and popping within the
burner area during heating and cooling periods and should
be considered normal.
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Explosion Hazard
• Flammable hydrogen gases may
be present.
• Keep all ignition sources away
from faucet when turning on hot
water.
HYDROGEN GAS: Hydrogen gas can be produced in
a hot-water system that has not been used for a long
period of time (generally two weeks or more). Hydrogen
gas is extremely flammable and explosive. To prevent
the possibility of injury under these conditions, it is
recommended that the hot-water faucet, located farthest
away, be opened for several minutes before any electrical
appliances which are connected to the hot-water system
are used (such as a dishwasher or washing machine). If
hydrogen gas is present, there will probably be an unusual
sound similar to air escaping through the pipe as the hotwater faucet is opened. There must be no smoking or open
flame near the faucet at the time it is open.
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PERIODIC MAINTENANCE
GENERAL UPKEEP
Make it a habit to look around the heater, the vent piping,
and the hot and cold water pipes. Do not allow any material
to be piled up against the heater. Do not place any object
on top of the vent pipes.
Every 3 - 6 months or as necessary:
• Clean lint from blower, top of heater.
Chemical vapor corrosion of the flue and vent system
may occur if air for combustion contains certain chemical
vapo rs. Spray can propellants, cleaning solvents,
refrigerator and air conditioner refrigerants, swimming pool
chemicals, calcium and sodium chloride, waxes, bleach
and process chemicals are typical compounds which are
potentially corrosive.
Once per year:
• Inspect the Vent System.
• Burner Operation and Inspection.
• Combustion Chamber for scaling or sooting.
• Temperature-Pressure Relief Valve Test.
• Anode Rod Inspection.
• Flush a pail of water from the heater drain valve, once
per year.
If any deficiencies or abnormalities are encountered during
these inspections call a qualified service technician.
If after inspection of the vent system you found sooting or
deterioration, something is wrong. Call the local gas utility
to correct the problem and clean or replace the flue and
venting before resuming operation of the water heater.
Flood damage to a water heater may not be readily visible
or immediately detectable. However, over a period of time
a flooded water heater will create dangerous conditions
which can cause death, serious bodily injury, or property
damage. Contact a qualified installer or service agency to
replace a flooded water heater. Do not attempt to repair
the unit! It must be replaced!
BURNER OPERATION AND INSPECTION
At least once a year a visual inspection should be made of
the main burner and the hot surface igniter assembly for
proper flame characteristics and ignition sequences. This
can be done by removing the outer door and viewing the
main burner operation through the viewport on the inner
door (see Figure 52). The main burner should provide
complete combustion of gas, ignite rapidly, give reasonably
quiet operation, and cause no excessive flame lifting from
the burner ports. If the proper flame characteristics are
not evident (see Figure 53), make sure that the flow of
combustion and ventilation air is not blocked. Inspection
of exhaust/air intake termination is needed to ensure there
is no blockage there.
VENTING SYSTEM INSPECTION
WARNING
Breathing Hazard - Carbon Monoxide Gas
• Flue gases may escape if vent pipe is not properly
connected.
• Be alert for obstructed, sooted or deteriorated vent
system to avoid serious injury or death.
• Do not store corrosive chemicals in vicinity of water
heater.
• Chemical corrosion of flue and vent system can
cause serious injury or death.
• Analyze the entire vent system to make sure that
condensate will not become trapped in a section of
vent pipe and therefore reduce the open cross
sectional area of the vent.
You should also check for sooting. Soot is not normal and
will impair proper combustion. A visual inspection of the
main burner and hot surface igniter should also be done
at least once a year (see Figure 52).
Soot build-up indicates a problem that requires correction
before further use. Turn “OFF” gas to water heater by
unplugging the power cord and leave off until repairs are
made. Failure to correct the cause of the sooting can result
in a fire causing death, serious injury, or property damage.
IGNITER
AND FLAME
ROD
MAIN
BURNER
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
At least once a year a visual inspection should be made
of the venting system. You should look for:
• Obstructions which could cause improper venting. The
combustion, dilution and ventilation air flow must not
be obstructed.
• Damage or deterioration which could cause improper
venting or leakage of combustion products.
IGNITER
AND
FLAME
ROD
VIEWPORT
Figure 52.
Be sure the vent piping is properly connected to prevent
escape of dangerous flue gases which could cause deadly
asphyxiation.
Obstructions and deteriorated vent systems may present
serious health risk or asphyxiation.
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100228375
BLUE TIPS
LIGHT BLUE INNER
CONES ARE
SATISFACTORY
INCORRECT
FLAME LAZY
YELLOW
CORRECT FLAME
SOFT BLUE
Figure 53.
COMBUSTION CHAMBER AND BURNER CLEANING
In the event your burner or burner air openings require
cleaning, Call your service agency to remove and clean
the burner and correct the problem that required the burner
to be cleaned.
When checking the temperature-pressure relief valve
operation, make sure that (1) no one is in front of or around
the outlet of the T&P valve discharge line, and (2) that
water discharge will not cause any property damage, as
water may be extremely hot. Use care when operating
valve as the valve may be hot.
To check the relief valve, lift lever at the end of valve
several times (see Figure 54). The valve should seat
properly and operate freely.
If after manually operating the valve, it fails to completely
reset and continues to release water, immediately close
the cold-water inlet to the water heater and drain the water
heater, see “Draining And Flushing” section. Replace
the T&P valve with a properly rated/sized new one, see
“Temperature-Pressure Relief Valve” for instructions on
replacement.
HOUSEKEEPING
DANGER
Fire and Explosion Hazard
• Do not place chemical vapor
emitting products near air intake
and exhaust terminations.
• Do not use or store flammable
vapor products such as gasoline, solvents or adhesives in the
same room or area near water
heater or other appliance.
• Can cause serious injury or
death.
INSTALLED IN SUITABLE AREA:
To ensure sufficient ventilation and combustion air
supply, proper clearances from the water heater must
be maintained. See “Locating The New Water Heater”
section. Combustible materials such as clothing, cleaning
materials, or flammable liquids, etc. must not be placed
against or adjacent to the water heater which can cause
a fire.
TEMPERATURE-PRESSURE RELIEF VALVE TEST
DANGER
Figure 54.
If the Temperature-Pressure Relief Valve on the water
heater weeps or discharges periodically, it may be due to
thermal expansion.
Note: Excessive water pressure is the most common
cause of temperature-pressure relief valve leakage.
Excessive water system pressure is most often caused
by “thermal expansion” in a “closed system.” See
“Closed Water Systems” and “Thermal Expansion”
sections of this manual. The T&P valve is not intended
for the constant relief of thermal expansion.
Temperature-pressure relief valve leakage due to pressure
build up in a closed system that does not have a thermal
expansion tank installed is not covered under the Limited
Warranty. Thermal expansion tanks must be installed on
all closed water systems.
• Burn hazard.
• Hot water discharge.
HOT
• Keep clear of
temperature-pressure
relief valve discharge.
BURN
It is recommended that the temperature-pressure relief
valve be checked to ensure it is in operating condition at
least once a year.
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45
WARNING
Explosion Hazard
• Temperature-pressure relief
valve must comply with ANSI
Z21.22-CSA4.4 and ASME
code.
• Properly sized temperaturepressure relief valve must be
installed in opening provided.
• Do not plug, block, or cap the
discharge line.
• Failure to follow this warning
can result in excessive tank
pressure, serious injury or
death.
DRAINING AND FLUSHING
Periodic draining and cleaning of sediment from the tank
maybe necessary. It is recommended that the tank be
drained and flushed every 6 months to remove sediment
which may build up during operation. The water heater
should be drained if being shut down during freezing
temperatures. See “Typical Installation” section in this
manual for location of the water heater components
described below.
DANGER
• Burn hazard.
• Hot water discharge.
HOT
• Keep hands clear of drain
valve discharge.
9. Close the water heater drain valve when all water in
the storage tank has drained and remove the hose.
10. Follow instructions in the “Filling The Water Heater”
section.
11. Follow the lighting instructions on the label or see
“Lighting Instructions” to restart the water heater.
Note: If the water heater is going to remain shut down and
empty for an extended period, the drain valve should be
left open with hose connected allowing water to terminate
to an adequate drain.
To Flush The Water Heater Storage Tank
Follow Step 1 through Step 7 in the
“To Drain The Water Heater Storage Tank” section.
1. Flush the tank by opening the cold water supply valve
and letting the water run until no more sediment drains
from the tank.
2. Close the water heater drain valve when flushing is
completed and remove the drain hose.
3. Ensure the heater is full of water.
4. Follow instructions in the “Filling The Water Heater”
section.
5. Follow the lighting instructions on the label or see
“Lighting Instructions” to restart the water heater.
Caution: Do not turn on power to the water heater unless
the tank is full. Open a hot-water faucet and allow the
water to run until the air is purged and the water flows
uninterrupted from the faucet.
Important: When operating a cold tank, condensation can
occur and drip on the burner. This should not be confused
with a tank leak.
BURN
To Drain The Water Heater Storage Tank
1. Turn “OFF” the electrical supply to the water heater.
2. Turn “OFF” the gas supply at the Main Gas shut-off
Valve.
3. Open a hot water faucet and let the hot water run until
it is cool (This may take 10 minutes or longer).
Warning: Be sure the water runs cool before draining the
tank to reduce the risk of scalding.
4. Connect a garden hose to the drain valve and place
the other end of the hose in an adequate drain,
outside, or in buckets. Note that sediment in the bottom
of the tank may clog the valve and prevent it from
draining. If you can’t get the tank to drain, contact a
qualified person.
5. CLOSE the cold-water inlet valve to the water heater.
6. Open the drain valve on the water heater.
7. If not already done, open a hot water faucet to help
the water in the tank drain faster.
8. If a large amount of sediment was present when
the tank was drained, follow instructions in the
“To Flush The Water Heater Storage Tank” section.
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100228375
ANODE ROD MAINTENANCE
CAUTION
Property Damage Hazard
• Avoid water heater damage.
• Inspection and replacement of anode rod required.
NEW
Anode Rod. The anode rod is a sacrificial metal rod that
helps avoid corrosion and premature failure (leaks) in the
tank. The anode rod is a consumable item. Inspect the
anode rod after the first six months of operation when
you drain and flush the tank. Replace the anode rod if
it is substantially worn out or depleted (see Figure 55).
Thereafter, inspect the anode rod annually or more
frequently if needed. If you use a water softener, your
anode rod will deplete faster than normal. Inspect the
anode rod more frequently, replacing the anode rod if it
is depleted. Once the anode rod is depleted, the tank will
start to corrode, eventually developing a leak. Obtain a
new anode rod from your local plumbing supplier or have a
qualified person replace it. (Anode rods are a consumable
item and are not covered under warranty).
Certain water conditions will cause a reaction between the
anode rod and the water. The most common complaint
associated with the anode rod is a “rotten egg smell”
produced from the presence of hydrogen sulfide gas
dissolved in the water. The removal of the anode rod
requires a 1-1/16” socket.
Important: Do not operate the water heater without a
functioning anode rod as this will void any warranties.
A special anode rod may be available if water odor or
discoloration occurs.
PARTIALLY DEPLETED
FULLY DEPLETED
Figure 55.
* THE ANODE ROD IS COVERED
BY URETHANE FOAM LOCATED
UNDER THE CAP. CHIP AWAY
THE FOAM TO EXPOSE THE
TOP OF THE ANODE ROD
CAP
ANODE ROD *
Note: This rod may reduce but not eliminate water odor
problems. The water supply system may require special
filtration equipment from a water conditioning company to
successfully eliminate all water odor problems.
To replace the anode:
1. Turn “OFF” the electrical supply to the water heater.
2. Turn “OFF” the gas supply at the Main Gas shut-off
Valve.
3. CLOSE the cold-water inlet valve to the water heater.
4. OPEN a nearby hot-water faucet and leave open to
allow for draining.
5. Drain approximately 5 gallons of water from tank. (Refer
to “Draining And Flushing” for proper procedures).
Close drain valve.
6. Remove old anode rod.
7. Use Teflon® tape or approved pipe sealant on threads
and install new anode rod.
8. Remove the hose and follow instructions in the
“Filling The Water Heater” section.
9. Follow the lighting instructions on the label or see
“Lighting Instructions” to restart the water heater.
See the Figure 56 for anode rod location.
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Figure 56.
47
LEAKAGE CHECKPOINTS
SERVICE
If a condition persists or you are uncertain about the
operation of the water heater contact a service agency.
Use this guide to check a “leaking” water heater. Many
suspected “leakers” are not leaking tanks. Often the source
of the water can be found and corrected.
If you are not thoroughly familiar with gas codes, your
water heater and safety practices, contact your gas
supplier or qualified installer to check the water heater.
Leakage from other appliances, water lines, or ground
seepage should also be checked.
* To check where threaded portion enters tank, insert
cotton swab between jacket opening and fitting. If cotton is
wet, follow the instructions in the “Draining And Flushing”
section and then remove fitting. Put pipe dope or
Teflon® tape on the threads and replace. Then follow the
instructions in the “Filling The Water Heater” section.
WARNING
Ensure the venting is properly attached and secured.
Read and understand instruction
manual and safety messages
before installing, operating or
servicing this water heater.
Never use this water heater unless it is completely filled
with water. To prevent damage to the tank, the tank must
be filled with water. Water must flow from the hot-water
faucet before turning “ON” gas to the water heater.
A. Water at the blower assembly is water vapor which
has condensed out of the combustion products. This
is caused by a problem in the vent. A drainage port is
included at the vent pipe connection.
B. *Condensation may be seen on pipes in humid
weather or pipe connections may be leaking.
C. *The anode rod fitting may be leaking.
D. Small amounts of water from temperature-pressure
relief valve may be due to thermal expansion or high
water pressure in your area.
E. *The temperature-pressure relief valve may be leaking
at the tank fitting.
F. Water from a drain valve may be due to the valve
being slightly opened.
G. *The drain valve may be leaking at the tank fitting.
H. Combustion products contain water vapor which can
condense on the cooler surfaces of the tank. Droplets
form and drip onto the burner. This is common at the
time of start-up after installation and when incoming
water is cold.
I. Water in the water heater bottom may be from
condensation, loose connections, or the relief valve.
DO NOT replace the water heater until a full inspection
of all possible water sources is made and necessary
corrective steps taken.
Failure to follow instructions and
safety messages could result in
death or serious injury.
Instruction manual must remain
with water heater.
B
A
C
E
G
H
F
I
D
Figure 57.
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REFERENCE PARTS LISTING
Replacement parts may be ordered
through your plumber or the local
distributor. When ordering replacement
parts, always have the following
information ready:
1. Model, Serial and Product number
2. Type of gas
3. Item number
4. Parts description
1 Termination Elbow with Vent Screen
2 *Vent Pipe
3 *Vent Pipe Elbow (long radius)
4 Sound Suppressor (Optional)
6 Cold-Water Inlet Nipple/Diptube
7 **Combo Heating System Supply Outlet
(Optional)
8 T&P Valve
9 * Discharge Pipe
10 **Combo Heating System Return Inlet
(Optional)
11 Gas Control Valve/Thermostat
(Honeywell)
12 Gas Valve Electronic Control Module
And Cover (Honeywell)
13 Drain Valve
2
1
3
14 Outer Gas Door
15 Manifold Door Assembly (behind outer
door) (see Figure 3 &
Figure 4) (see also Figure 60 &
Figure 61)
16 *Metal Drain Pan
17 *Floor Drain
24 Anode (under cap)
25 Baffle Assembly
26 Hot-Water Outlet Nipple/Anode
28 ****Rubber Coupling (see Figure 5)
(see also Figure 62)
29 Gear Clamp (see Figure 5) (see also
Figure 62)
30 ***Blower with Power Cord (see
Figure 5) (see also Figure 62)
31 Air Duct Adapter
32 Air Inlet Snorkel
33 Air Duct
35 Flame Sensor Rod (see Figure 3
& Figure 4) (see also Figure 60 &
Figure 61)
36 Sheet Metal Burner (see Figure 3
& Figure 4) (see also Figure 60 &
Figure 61)
37 Gas Orifice (see Figure 3 &
Figure 4) (see also Figure 60 &
Figure 61)
38 Gas Manifold (see Figure 3 & Figure
4) (see also Figure 60 & Figure 61)
39 Hot-Surface Igniter (see Figure 3
& Figure 4) (see also Figure 60 &
Figure 61)
40 Manifold Door Gasket (see Figure 3
& Figure 4) (see also Figure 60 &
Figure 61)
41 Manifold Door (see Figure 3 & Figure
4) (see also Figure 60 & Figure 61)
42 Two Piece Grommet With Clip (see
Figure 3 & Figure 4) (see also
Figure 60 & Figure 61)
43 Viewport (see Figure 3 & Figure 4)
(see also Figure 60 &
Figure 61)
44 Air Tubing (Intake) (see Figure 5) (see
also Figure 62)
45 Blower High Limit Switch (see Figure
5) (see Figure 62)
46 Intake Air Pressure Switch (NC)
(inside box) (see Figure 5) (see also
Figure 62)
47 Capacitor (see Figure 5) (see also
Figure 62)
48 Air Tubing (Exhaust) (see Figure 5)
(see also Figure 62)
49 Exhaust Air Pressure Switch (NO)
(inside box) (see Figure 5) (see also
Figure 62)
*, **, ***, **** see notes on following
page
4
AIR INLET
PIPING
1
EXHAUST OUTLET
PIPING
2
28
6
7
26
29
30
8
9
31
33
6
25
10
24
32
11 12
13
14 15
Front View
Figure 58.
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17
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Rear View
Figure 59.
49
Natural gas and Propane
(LP) main burner with
igniter assembly for 40k
and 45k Btu/hr models
(item 15 in Figure 1).
Flare
Nut
††
Shown with
Junction Box Cover
removed for clarity.
36
†
30
37
28
29
44
49
35
38
39
45
48
47
40
46
41
43
Figure 62.
42
Figure 60.
Notes:
*
Items not supplied with the water heater.
** The side recirculation loop connections may not be
used as the primary water inlet and outlet connections.
See “Combo Heating Inlet And Outlet Side Taps”.
*** Caution harness has 120 VAC In operation.
**** See “Vent Pipe Installation” for more information.
Natural gas and Propane
(LP) main burner with
igniter assembly for 58k,
62k, 72k & 76k Btu/
hr models (item 15 in
Figure 1).
Flare
Nut
††
36
†
37
†
35
††
38
The orifice on Natural gas models has Right-hand
thread, the orifice on Propane (LP) models has Lefthand thread.
For Natural gas models the Flare Nut has Right-hand
thread. For Propane (LP) models the Flare Nut has
Left-hand thread.
39
43
42
40
41
Figure 61.
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TROUBLESHOOTING GUIDELINES
These guidelines should be utilized by a qualified service
agent.
LOCKOUTS
Soft Lockout
• Occurs when a system safety device trips to break the
sequence of operation. The control will try to start the
system in a timed basis but will not reinstate operation
until the failure is corrected.
Hard Lockout
• Occurs when the main controller fails and must be
replaced.
RESETTING THE HEATER CONTROL
• Soft lockouts as diagnosed by the system error codes
require the gas control to be reset.
• To reset the control, slide the “ON/OFF” switch to the
“OFF” position. Wait for 10 seconds and move the
switch back to the “ON” position.
• If the problem that caused the control to lock out has
not been corrected, the control will remain or again go
back into lockout.
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IGNITION STATE AND TIMING
IGNITION STATE
Pre-purge
TIMING
5 seconds (NG models)
15 seconds (LP models)
Hot Surface Igniter
(HSI) Warmup
10 seconds
Ignition Activation
Period (IAP)
3.5 seconds maximum
Flame Recognition
Period (FRP)
0.5 second
Trial For Ignition
IAP + FRP
Flame Stabilization
Period
Not Applicable
Inter-purge
30 seconds
Flame Failure
Response Time
2 seconds max
(@ 1uA flame current)
Post-purge
30 seconds
Pressure Switch (PS)
Prove Period
2 minutes
Pressure Switch (PS)
Fault Delay (failed
open/closed)
2 minutes
Soft Lockout
20 minutes
Energy Cut Off
(ECO) Limit Lockout
Indefinite
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51
SYSTEM STATUS AND ERROR CODES
The micro-controller inside the gas control monitors the ignition sequence, temperature settings, and overall operation of
the heater. If any of these parameters does not operate properly the controller will shut down the water heater, diagnose
the failure and flash an error code. The table below lists the System Status Codes for the Honeywell control. Refer to it
and to the “Ignition State And Timing” to diagnose the problem before attempting corrective action.
LED Flash Sequence
Control Status
Corrective
Action
Number
Short flash once every four seconds
IDLE (no call for heat, no fault conditions)
1
“Heartbeat”, alternates bright/dim
Call For Heat (no fault conditions)
2
One Flash, three second pause
Low Flame Signal (control continues to operate)
3
Two Flash, three second pause
Pressure Switch Failed Closed
4
Three Flash, three second pause
Pressure Switch Failed Open
5
Four Flash, three second pause
ECO (Energy Cut Off) Limit Lockout
thermostat temperature limit was exceeded.
6
Five Flash, three second pause
Flame Out Of Sequence
7
Six-One Flash, three second pause
Soft Lockout
- Retry Limit
- Failed Trial For Ignition
8
Six-Two Flash, three second pause
Soft Lockout
- Recycle Limit
- Pressure Switch/ High Limit opened
9
Six-Three Flash, three second pause
Soft Lockout
- Recycle Limit
- Flame Lost
10
Six-Four Flash, three second pause
Soft Lockout
- Flame out of Sequence Sensed
11
Seven Flash, three second pause
N/A
(Flammable Vapour Sensor Lockout)
12
Eight-One Flash, three second pause
N/A
(Flammable Vapour Sensor Fault Detected)
Eight-Two Flash, three second pause
Temperature Sensor Fault Detected
14
Eight-Three Flash, three second pause
Electronics Fault Detected
15
Eight-Four Flash, three second pause
Valve Fault Detected
16
LED continuously “ON”
Hard Lockout
17
13
READING THE LED FLASH SEQUENCE.
The LED indicator light is active when the gas valve/thermostat is in operation. The light will normally show a flash
sequence of a short flash once every four seconds or a “Heartbeat” of alternating bright/dim. Multiple flash codes indicate
an error and can be read as follows:
Example: Corrective Action Number 9, Six-Two Flash, three second pause. For this code, the LED indicator light will
make six bright flashes, pause for one second and then make two more bright flashes. The LED will pause for three
seconds and repeat the six-two cycle of flashes.
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CORRECTIVE ACTIONS
See the table below for corrective actions corresponding to the Corrective Action Number in the “System Status And Error Codes”
section above. If following those corrective actions does not resolve the error, refer to “Other Symptoms“ table later in
this manual.
Corrective
Action
Number
Corrective Action
1
Normal operation, no action necessary.
2
Normal operation, no action necessary.
3
1. Flame rod not properly seated in flame, reposition rod.
2. Clean flame sensor rod with fine steel wood to avoid lock-out.
1.
2.
3.
4.
4
Check that blower operates and does not have any blockages.
Check that all wiring is correct.
Ensure the air pressure sensing tubes are properly connected and not kinked or damaged.
Ensure the air pressure switch is correct and the air pressure switch (N.O.) is not bypassed
(jumpered).
5. Turn power to the unit “OFF” – check for continuity of the air pressure switch (N.O.) with wires
disconnected;
a. If the pressure switch contacts show continuity (closed circuit), replace the pressure switch,
b. If the pressure switch contacts are open and all wiring is correct, replace the Gas Control.
5
1. Ensure the blower is running - check for 120 VAC to the blower when the heating cycle begins.
a. If the Gas Control does not energize the blower - replace the Gas Control.
b. If the blower fails to start when energized:
i. Turn power to the heater “OFF” – check if the capacitor is connected;
ii. Turn power to the heater “OFF” – check the capacitor rating (3uF +/-5%);
iii. Turn power to the heater “OFF” - replace the blower assembly.
2. Ensure the air pressure sensing tubes are properly connected and not kinked or damaged;
3. Check continuity of the vent temperature limit switch – replace switch if contact remain open.
4. Check continuity of the air pressure switch (N.C.) – replace switch if contact remain open.
5. Ensure the correct size of exhaust and air intake pipes were used per the instruction manual
for vent length. Ensure maximum number of elbows or equivalent feet of both pipes was not
exceeded.
6. Ensure there are no obstructions in the exhaust and air intake pipes.
7. If there are excessive restrictions in the air intake pipe the air pressure switch (N.C.) will open.
8. Check air pressure switch performance - Check blower vacuum with a manometer - Compare
with air pressure switch (N.O.) setting. If the air pressure switch proves defective – replace the air
pressure switch (N.O.).
9. If the air pressure switch (N.O.) performance test results prove the air pressure switch is working
properly, and all other steps are followed, and fault code persist – replace the control.
6
Resetting the ECO (Energy Cut-Out) requires manual intervention. It cannot be reset by cycling power
to the control.
Reset Procedure
1. Manual reset is performed by turning the set point knob to lowest set point position for a minimum
of 10 seconds and then return it to the desired set point.
2. The manual reset of the ECO can only be performed 2 times, after the ECO trips a third time, the
gas valve will enter a hard lock out where the gas control will need to be replaced.
7
1.
2.
3.
4.
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Turn the power “OFF” for 10-20 seconds then “ON” again to clear the fault code.
Flame rod not properly seated in flame, reposition rod.
Clean flame sensor rod with fine steel wood to avoid lock-out.
Replace the control if the fault code persists.
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53
Corrective
Action
Number
Corrective Action
8
1. Gas supply is turned off or gas pressure is too low. Ensure supply pressure and manifold gas
pressures are within requirements. Manifold pressure is nonadjustable, if gas supply pressure
proves correct and manifold pressure is off by more than 0.3” WC replace the control.
2. Low supply voltage - should be 115 - 125 VAC
3. Ensure flame sensor is making good contact with the burner flame and flame is steady.
4. Ensure flame sensor is clean, use ultra- fine steel wool to clean flame sensor.
5. Ensure the Hot Surface Igniter is positioned properly to provide consistent ignition.
6. Check for any cracks in igniter assembly ceramic insulators - replace igniter assembly if damaged.
7. Check resistance of igniter at room temperature (at the plug). Replace the igniter if resistance is
not within 42-76 ohms at room temperature.
8. Ensure correct size of exhaust and air intake pipes were used per the instruction manual for vent
length. Ensure maximum number of elbows or equivalent feet of both pipes was not exceeded.
9
1. Ensure the blower is running - check for 120 VAC to the blower when the heating cycle begins.
a. If the Gas Control does not energize the blower - replace the Gas Control.
b. If the blower fails to start when energized:
i. Turn power to the unit “OFF” – check if the capacitor is connected;
ii. Turn power to the unit “OFF” – check the capacitor rating (3uF +/-5%);
iii. Turn power to the unit “OFF” - replace the blower assembly.
2. Ensure the air pressure sensing tubes are properly connected and not kinked or damaged;
3. Check continuity of the vent temperature limit switch – replace switch if contacts remain open.
4. Check continuity of the air pressure switch (N.C.) – replace switch if contacts remain open.
5. Ensure correct size of exhaust and air intake pipes were used per the instruction manual for vent
length. Ensure maximum number of elbows or equivalent feet of both pipes was not exceeded.
6. Ensure there are no obstructions in the exhaust and air intake pipes.
7. If there are excessive restrictions in the air intake pipe the air pressure switch (N.C.) will open.
8. Check air pressure switch performance - Check blower vacuum with a manometer - Compare
with air pressure switch (N.O.) setting. If the air pressure switch proves defective – replace the air
pressure switch (N.O.).
9. If the air pressure switch (N.O.) performance test results prove the air pressure switch is working
properly, and all other steps are followed, and fault code persist – replace the control.
10
1. Gas supply is turned “OFF” or gas pressure is too low. Ensure supply pressure and manifold gas
pressures are within requirements. Manifold pressure is nonadjustable. If supply pressure proves
correct and manifold, pressure is off by more than 0.3” WC replace the control.
2. Low supply voltage - should be 115 - 125 VAC
3. Ensure flame sensor is making good contact with the burner flame and flame is steady.
4. Ensure the flame sensor is clean, use ultra-fine steel wool to clean flame sensor.
5. Ensure the Hot Surface Igniter is positioned properly to provide consistent ignition.
6. Check for any cracks in igniter assembly ceramic insulators - replace igniter assembly if damaged.
7. Check resistance of igniter at room temperature (at the plug). Replace the igniter if resistance is
not within 42-76 ohms at room temperature.
8. Ensure correct size of exhaust and air intake pipes were used per the instruction manual for vent
length. Ensure maximum number of elbows or equivalent feet of both pipes was not exceeded.
11
1. Turn the power “OFF” for 10-20 seconds then “ON” again to clear the fault code.
2. Replace the control if fault code persists.
12
N/A – If this happens replace the gas control.
13
N/A – If this happens replace the gas control.
14
1. Turn the power “OFF” for 10-20 seconds then “ON” again to clear the fault code.
2. Replace the control if the fault code persist.
15
1. Turn the power “OFF” for 10-20 seconds then “ON” again to clear the fault code.
2. Replace the control if the fault code persist.
16
1. Turn the power “OFF” for 10-20 seconds then “ON” again to clear the fault code.
2. Replace the control if the fault code persist.
17
1. Control has failed. If resetting the control does not clear the fault code, replace the control.
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OTHER SYMPTOMS
Problem
Insufficient
Hot Water
Water Is
Too Hot
Slow Hot
Water Recovery
Drip From
Relief Valve
Smelly Water
Condensation
Possible Cause(S)
1.
2.
3.
4.
5.
6.
7.
Thermostat set too low
Leaking faucets/Wasted hot water
Wrong piping connections
Water heater too small
Sediment or lime in tank
Long runs of exposed piping
Hot-water piping in outside wall
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1.
2.
3.
4.
5.
6.
7.
Turn temperature knob to higher setting
Repair faucets
Correct piping: dip tube must be in cold inlet
Install adequate heater
Drain/flush-provide water treatment if needed
Insulate piping
Insulate piping
1. Thermostat setting is too high
2. Heater stacking (Failure to install
the proper vent screens)
1. Turn temperature knob to lower setting
2. Ensure correct size of exhaust and air intake pipes
were used per the instruction manual for vent
length. Ensure proper vent screens were used.
1.
2.
3.
4.
1.
2.
3.
4.
Thermostat set too low
Wrong piping connection
Wasted hot water
Heater too small
Turn temperature knob to higher setting
Correct piping-dip tube must be in cold inlet
Advise customer
Install adequate heater
1. Heater stacking (Failure to install
the proper vent screens)
2. Closed water system
3. Pressure build-up
4. Improperly seated valve
1. Ensure the correct size of exhaust and air intake
pipes were used per the instruction manual for vent
length. Ensure the proper vent screens were used.
2. See thermal expansion section
3. Use a pressure-reducing valve and relief valve
4. Check Relief valve for proper operation (Do Not
plug T&P valve)
1. Sulfides in water supply
2. Bacteria in water supply
3. Incompatible anode
1. Chlorination procedure
2. Chlorination procedure
3. Replace with anode appropriate for water
conditions
1. Filling the new water heater for the
first time
2. Water dripping from blower
assembly
1. Normal operation: the condensation should
disappear after heater warms up
2. Install condensate hose to drain port on the rubber
coupling
Water Leakage
Exhaust Pipe
Too Hot
Corrective Action
1. Check “Leakage Checkpoints”
1. Failure to use correct size of
exhaust and air intake pipes;
2. Failure to install the vent screens;
3. Blower high limit switch fails to
open - switch defective
1. Ensure the correct size of exhaust and air intake
pipes were used per the instruction manual for
vent length. Ensure maximum number of elbows or
equivalent feet of both pipes was not exceeded.
2. Ensure that the proper vent screens were used.
3. Replace blower high limit switch
www.americanwaterheater.com
55
500 Princeton Road, Johnson City, TN 37605
Phone: 800-999-9515 • Fax: 800-999-5210
www.americanwaterheater.com
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