American Standard HE 70-125 Manual
DURA-GLAS
Burner Thermostat Power
Temperature
On
Off
181414 Rev. 02 August - 2010
Operating, installation and service manual
CAUTION THIS WATER
HEATER SHOULD NOT BE USED
TO HEAT A SPA OR HOT TUB
WARNING: If the information in these instructions is not
followed exactly a re or explosion may result causing property damage, personal injury or death.
-
DO NOT store or use gasoline or other ammable 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 electric 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 re department.
- Installation and service must be performed by ed installer,
service agency or the gas supplier.
INSTALLER:
1. AFFIX THESE INSTRUCTIONS TO OR ADJACENT
TO WATER HEATER.
2. BEFORE LEAVING PREMISES: REVIEW THIS
OPERATION AND SERVICE MANUAL TO BE SURE
HEATER HAS BEEN INSTALLED CORRECTLY.
MAKE SURE UNIT IS STARTED AND OPERATED
FOR ONE COMPLETE CYCLE AND WATER
TEMPERATURE IS ACCEPTABLE TO THE CONSUMER
AT THE FIXTURES.
OWNER:
1. RETAIN THESE INSTRUCTIONS AND WARRANTY
FOR FUTURE REFERENCE.
AMERICAN STANDARD WATER HEATERS
HIGH EFFICIENCY MODELS: HE70-125, HE100-150, HE100-199 & HE100-250
REQUIRES 120 V A.C. POWER SUPPLY
American Standard Water Heaters http://www.waterheating.com
WARNING: This water heater is equipped for
one type of gas only. Check the data plate near the gas
control valve for the correct gas. DO NOT USE THIS
WATER HEATER WITH ANY GAS OTHER THAN
THE ONE LISTED ON THE DATA PLATE. Failure to
use the correct gas can cause problems which can result in
DEATH, SERIOUS BODILY INJURY OR PROPER-
TY DAMAGE. If you have any questions or doubts con-
sult your gas supplier or gas company. Water heaters for
bottled, propane or ed petroleum gas (LPG) are
different from natural gas models. A natural gas heater
will not function safely on bottled, propane or ed
petroleum gas (LPG) and no attempt should be made to
convert a heater from natural gas to any other gas.
IF YOU HAVE QUESTIONS THAT ARE NOT ANSWERED IN THE MANUAL YOU MAY CALL THE TOLL FREE
NUMBER 800 900-9063 OR CONTACT US BY EMAIL AT: [email protected].
DO NOT CONTACT US BY TELEPHONE OR EMAIL FOR WARRANTY REGISTRATION.
YOUR WATER HEATER SERIAL NUMBER IS ALREADY ON FILE. THE WARRANTY IS ACTIVATED AT THE
TIME OF PURCHASE. KEEP YOUR RECEIPT TO SHOW TO SERVICE PERSON IF SERVICE IS REQUIRED.
3
GENERAL SAFETY
NOTICE TO INSTALLERS & USERS. BE AWARE OF THE FOLLOWING DANGERS
ASSOCIATED WITH THE INSTALLATION AND USAGE OF GAS WATER HEATERS:
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.
WARNING: 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, including formaldehyde, carbon
monoxide, and soot.
AIR REQUIREMENTS: KEEP APPLIANCE AREA
CLEAR AND FREE OF COMBUSTIBLE MATERIALS,
GASOLINE AND OTHER FLAMMABLE VAPORS AND
LIQUIDS. DO NOT OBSTRUCT THE FLOW OF COM-
BUSTION AND VENTILATING AIR.
WARNING: FOR SAFE OPERATION, PROVIDE
ADEQUATE AIR FOR COMBUSTION AND
VENTILATION. AN INSUFFICIENT SUPPLY OF
AIR WILL CAUSE RECIRCULATION OF
COMBUSTION PRODUCTS RESULTING IN
CONTAMINATION THAT MAY BE HAZARDOUS
TO LIFE. SUCH A CONDITION COULD AFFECT
BURNER FLAME, CAUSING CARBONING OR
SOOTING OF THE COMBUSTION CHAMBER,
BURNERS AND FLUE TUBES AND CREATES A
RISK OF ASPHYXIATION.
MECHANICAL EXHAUSTING OF ROOM AIR: WHERE
AN EXHAUST FAN IS INSTALLED IN THE SAME ROOM
WITH A HEATER, SUFFICIENT OPENINGS FOR AIR
MUST BE PROVIDED IN THE WALLS. UNDERSIZED
OPENINGS WILL CAUSE AIR TO BE DRAWN INTO
THE ROOM THROUGH THE HEATER’S VENTING
SYSTEM, CAUSING POOR COMBUSTION.
SOOTING MAY RESULT IN SERIOUS DAMAGE
TO THE HEATER AND RISK OF FIRE OR
EXPLOSION. IT CAN ALSO CREATE A RISK
OF ASPHYXIATION.
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 continued protection against
risk of fi re:
Do not install water heater on
carpeted fl oor.
Do not operate water heater if
fl ood damaged.
Water temperature over 125ºF
(52ºC) can cause severe burns
instantly resulting in severe injury or
death.
Children, the elderly, and the
physically or mentally disabled are at
highest risk for scald injury.
Feel water before bathing or
showering.
Temperature limiting valves are
available.
Read instruction manual for safe
temperature setting.
Overheated water can cause
water tank explosion.
Properly sized temperature
and pressure relief valve
must be installed in opening
provided.
Please complete the following information at the time of installa-
tion, retain and present along with the warranty in the event that
a claim is necessary.
MODEL NUMBER______________________
TYPE OF GAS_________
SERIAL NUMBER __________________________________
INSTALLATION ADDRESS:___________________________
________________________________________________
________________________________________________
DATE OF INSTALLATION:____________________________
THIS WATER HEATER HAS BEEN INSTALLED IN ACCORDANCE WITH
THESE INSTALLATION INSTRUCTIONS AND LOCAL CODE
REQUIREMENTS
INST
THIS WATER HEATER MUST BE PROPERLY AND REGULARY MAINTAINED.
FAILURE TO DO SO WILL VOID THE WARRANTY.
ALLER _____________________________________
WARNING:
IMPROPER INSTALLATION,
ADJUSTMENT,ALTERATION,
SERVICE OR MAINTENANCE CAN
CAUSE INJURY, DEATH OR
PROPERTY DAMAGE. READ AND
REFER TO THIS MANUAL.
TABLE OF Contents
WARRANTY LIMITATIONS
THE MANUFACTURER OF THIS WATER HEATER
WILL NOT BE RESPONSIBLE FOR TANK FAILURES
OR WATER HEATER FAILURES RESULTING FROM
ANY OF THE FOLLOWING. CONDITIONS AND
MAY AT IT'S DISCRETION VOID THE WATER
HEATER WARRANTY WHEN THESE CONDITIONS
RESULT IN PREMATURE FAILURES OF THE TANK
OR COMPONENTS...
1. INSTALLATIONS NOT COMPLYING WITH ALL
LOCAL CODES.
2. FAILURES DUE TO UNDERSIZING OF THE
WATER HEATER AND SUBSEQUENT
EXCESSIVE BURNER FIRING.
3. BAD WATER CONDITIONS SUCH AS WELL
WATER WITH EXCESSIVE MINERAL DEPOSITS.
IT IS THE RESPONSIBILITY OF THE INSTALLER
TO TAKE WHAT EVER STEPS ARE REQUIRED,
INCLUDING THE INSTALLATION OF WATER
SOFTENERS,TO PREVENT EXCESSIVE LIME
BUILD UP AND SUBSEQUENT METAL FATIGUE
DUE TO OVER HEATING OF THE TANK
BOTTOM.
4. FAILURE TO USE THE HAND HOLE
CLEANOUT PROVIDED IN THIS WATER
HEATER TO KEEP LIME DEPOSITS IN THE TANK
BOTTOM FROM EXCEEDING 2" IN HEIGHT.
5. INSTALLATION OF MULTIPLE HEATERS IN
LINE RATHER THAN PARALLEL PER THE
INSTRUCTIONS PROVIDED ON PAGES 9 AND
10 OF THIS MANUAL RESULTING IN EXCESS
FIRING AND/OR EXCESSIVE CONDENSATION
OF ONE OR MORE OF THE HEATERS.
6. FAILURE OF THE HEATER OR COMPONENTS
AS A RESULT OF IMPROPER VENTING
RESULTING IN NEGATIVE AIR PRESSURE DUE
TO IMPROPER LOCATION OR OVERHEAD
FANS.
7. FAILURE OF THE HEATER OR COMPONENTS
CAUSED BY CHEMICALS OR SOLVENTS
BEING STORED IN THE IMMEDIATEVICINITY
OF THE WATER HEATER.
1
THIS MANUAL HAS BEEN PREPARED TO ACQUAINT YOU WITH THE
INSTALLATION, OPERATION AND MAINTENANCE OF YOUR GAS
WATER HEATER AND TO PROVIDE IMPORTANT SAFETY INFORMATION.
WE URGE YOU TO READ ALL INSTRUCTIONS THOROUGHLY BEFORE
ATTEMPTING INSTALLATION OR OPERATION OF YOUR WATER HEATER.
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE.
The manufacturer of this water heater will not be liable for any damages
caused by failure to comply with the installation and operating instructions
outlined on the following pages. These instructions are a guide for the correct
installation of your water heater. If you lack the necessary skills required or
have diffi culty following the directions, you should not proceed but get help
from a qualifi ed person for that part of the installation you do not understand.
Failure to follow this warning can result in an incorrect installation that can
result in DEATH, INJURY OR PROPERTY DAMAGE.
This water heater is design-certifi ed by CSA International as both a direct vent
and a non-direct vented water heater, which takes its combustion air, either
from the installation area or from air ducted to the unit from the outside.
CONSUMER RESPONSIBILITIES
DO NOT use this appliance if any part has been under water.
Immediately call a qualifi ed service technician. Water heaters subjected to
fl ood conditions, or anytime the gas controls, main burner or
pilot have been submerged in water, require replacement of the entire
water heater.
WARNING
UNPACKING THE WATER HEATER
Use two or more people to
move and install water heater,
unless proper handling
equipment is utilized. Failure to
do so can result in back or other
injury.
Important WARNINGS
Important: DO NOT REMOVE any
permanent instructions, labels, or the
data label from outside of the water
heater or on the inside of panels.
Remove exterior packaging and
place installation components aside.
Inspect all parts for damage prior
to installation and startup.
Completely read all instructions
before attempting to assemble and
install this product.
When referring to your water heater
always have the information listed on
the rating plate readily available.
Important: The water heater should be located in an area where leakage of
the tank or connections will not result in damage to the area adjacent to the
water heater or to lower fl oors of the structure. Due to the normal corrosive
action of the water, the tank will eventually leak after an extended period of
time. Also, any external plumbing leak, including those from improper
installation, may cause early failure of the water tank due to corrosion if not
repaired. A qualifi ed service technician should be contacted for repairs.
A suitable metal drain pan should be installed under the water heater as
shown below (Figure 1), to help protect the property from damage which may
occur from condensate formation or leaks in the piping connections or tank.
The pan must limit the water level to a maximum depth of 1 3/4 “ and be at
least two inches wider than the heater and piped to an adequate drain. Locate
the water heater near a suitable indoor drain. Outside drains are subject to
freezing temperatures which can obstruct the drain line. The piping should be
at least 3/4” ID and pitched for proper drainage.
Under no circumstances will the manufacturer or seller of this water heater
be held liable for any water damage which is caused by your failure to follow
these instructions.
LOCATION
WARNING
Location selection should be as close
to the stack or chimney as practical
and as centralized with the piping
system as possible.
Water heater should be located in
an area not subject to freezing
temperatures.
The water heater should be located
so that the controls and drain are
easily accessible (at least 24 inches in
front of the water heater).
2
Piped to adequate
drain. 1.75 MAX.
At least two inches greater than the largest
diameter of the water heater..
FIRE AND EXPLOSION HAZARD
Can result in serious injury or death
Do not store or use gasoline or flammable vapors and
liquids in the vicinity of this or any other appliance.
Storage of 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.
LOCATION REQUIREMENTS
If installed in a garage, avoid damage
to your water heater by installing a
vehicle stop as shown in figure 2.
Check state and local codes for
requirements prior to installation.
This water heater is not certified for
installation in mobile homes.
GARAGE
VEHICLE
STOP DRAIN
The water heater must be installed indoors and in a
vertical position on a level surface.
DO NOT install in bathrooms, bedrooms, or any
occupied room normally kept closed.
NOTE: The water heater may be installed in a closet with a door,
other than a bedroom or bathroom, providing the units are installed
and vented per the manufacturer’s instructions. The venting system
must comply with the requirements set forth in the venting section
of this manual.
Important: Air for combustion and ventilation must not
come from a corrosive atmosphere. Any failure due to
corrosive elements in the atmosphere is excluded from
warranty coverage.
NOTE: This water heater must be installed according to all local
and state codes; Or, in the absence of local and state codes; the
“National Fuel Gas Code”, ANSI Z223 .1 (NFPA 54)-Latest edition.
This publication is available from the following:
American Gas Association
Orders telephone No: (Toll Free)
866.816.9444
National Fire Protection Agency.
1 Batterymarch Park.
Quincy, MA 02269.
Check your local phone listings for the local authorities
having jurisdiction over your installation.
NOTE: In the State of California, the water
heater must be braced, anchored, or strapped
to avoid moving during an earthquake.
Contact local utilities for code requirements
in your area or call 1-800-456-9805
and request instructions.
Figure 1. Metal Drain Pan
Figure 2.Vehicle Stop in Garage
A
C
4
Install Vent system in accordance with codes.
Do not operate water heater if flood damaged.
Do not operate if soot build up is present.
Do not obstruct water heater air intake with
insulating jacket.
Do not place chemical Vapor emitting products near water
heater.
Gas and Carbon monoxide detectors are available.
Breathing Hazard - Carbon Monoxide Gas
Breathing carbon monoxide can cause brain damage or death.
Always read and understand instruction manual.
WARNING: If replacing an
existing water heater, the
venting system must be reviewed
to be certain it complies with the
requirements in this manual.
INSTALLATION CHECK LIST
This is presented for ease of reference. It is not comprehensive.
All instructions and warnings must be read and adhered to.
WATER HEATER LOCATION REQUIREMENTS
Proper clearance from combustible surfaces observed
and heater not installed directly on carpeted floor.
Sufficient room to service the water heater.
Provisions made to protect area from water damage.
Properly sized drain pan installed and piped to an
adequate drain.
Installation area free of corrosive elements and
flammable vapors or materials.
Sufficient fresh air supply for proper operation of
heater.
Keep vent inlets and outlets free of obstructions.
CONDENSATE LINE
Drain stem is fully inserted in the elbow and glued
properly.
Trap aligned so that the exhaust pipe is in a vertical
position close to the surface of the water heater.
Properly sloped to adequate drain or approved pump.
Protected from freezing if required.
VENT PIPE SYSTEM
Vent pipe and fittings of approved material.
Acceptable size, length, and number of elbows on air
inlet pipe.
Installed in accordance with the prevailing provisions
of Local codes, or in the absence of such, National Fuel
Gas Code, NFPA 54,ANSI Z223.
Not obstructed in any way.
VENT TERMINATION
Correct relationship- outlet to inlet.
12” Min. above grade/snow level.
2” exhaust outlet/air inlet pipe sloped down towards
water heater at 1/4” per foot. 3” piping sloped down
towards the heater at 1/8” per foot.
Away from corners, other vents, windows, etc.
ALTERNATE HORIZONTAL VENT TERMINATION
Correct relationship - outlet to inlet.
12” Min. above anticipated snow level.
Away from corners, other vents, windows, etc.
VERTICAL VENT TERMINATION - SINGLE TUBE
Inlet -12” Min. above grade/snow level.
Correct relationship - outlet to inlet.
Away from corners, other vents, windows, etc.
CONCENTRIC VENT
12” Min. above grade/snow level.
Away from corners, other vents, windows, etc.
WATER SYSTEM PIPING
Temperature and pressure relief valve opening facing
downward 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.
5
A properly sized expansion tank must be installed on
all closed systems.
Tempering valve properly installed per manufacturer’s
instructions- if desired.
GAS SUPPLY AND PIPING
Adequate size for BTU input.
Gas supply is the same type as listed on the water
heater data plate.
Gas line equipped with full opening shut-off valve,
union and drip leg.
Approved pipe joint compound used.
Chloride-free soap and water solution or other
approved means used to check all connections and
fittings for possible gas leaks.
ELECTRICAL CONNECTIONS
Unit connected to a dedicated power supply.
Unit connected to a 120V electrical supply.
Proper Polarity.
Water heater properly grounded.The appliance when
installed must be electrically grounded in accordance
with local codes or in the absence of local codes with
the National Electrical code,ANSI/N FPA-70.
Installed in accordance with prevailing provisions of
local codes, or in the absence of such, National Fuel
Gas Code, NFPA 54,ANSI Z223.
WATER PIPING
Pipes and fittings should be installed in compliance with the installation piping PAGE 9. Check for proper fitting in cold
water connection before connecting of hot and cold water lines. If the indoor installation area is subject to freezing
temperatures, water piping must be protected.The water heater should be drained from tank and lines if being shut
down during freezing temperatures. If sweat connections are used, sweat tubing to the adaptor before fitting
adaptor to the cold and hot water fittings. It is imperative that no heat be applied to the water heater fittings as they
may contain nonmetallic parts.
Install the water piping and fittings as shown on PAGE 9.
1. Connect the cold water supply (3/4” NPT) to the
bottom fitting marked “C”. Connect the hot water
supply (3/4” NPT) to the fitting marked “H” located
on top of the unit.
Important: Some models may contain energy saving
heat traps to prevent the circulation of hot water
within the pipes. Do not remove the inserts within
the heat traps.
2. The installation of unions in both the hot and cold
water supply lines is recommended for ease of
removing the water heater for service or
replacement.
3. The manufacturer of this water heater recommends
installing a tempering valve or anti-scald device for
a domestic hot water line. These valves reduce the
point-of-use temperature of the water by mixing
cold and hot water and are readily available for use.
4. Install a shut-off valve in the cold water inlet line. It
should be located close to the water heater and be
easily accessible. Know the location of this valve and
how to shut off the water to the heater.
5. A temperature and pressure relief valve is installed
in the opening marked “Temperature and Pressure
(T & P) Relief Valve” on the water heater.
6. Add a discharge line to the opening of the T & P
Prelief valve. Follow the instructions under
“Temperature and Pressure ReliefValve”.
7. After piping has been properly connected to the
water heater, open the nearest hot water faucet.
Open the hot water faucet and allow the tank to
completely fill with water.To purge the lines of any
excess air, keep the hot water faucet open for 3
minutes after a constant flow of water is obtained.
Close the faucet and check all connections for
leaks.
Water supply pressure should not exceed 80% of the
working pressure of the water heater.The working
pressure is stated on the water heater’s data plate. If this
occurs a pressure reducing valve with a bypass should be
installed in the cold water inlet line to the entire system.
This should be placed on the supply to the entire
structure in order to maintain equal hot and cold
pressures.
WARNING: OPERATING AN EMPTY
OR PARTIALLY FILLED WATER HEATER WILL RESULT
IN DAMAGE TO THE TANK
7
temperature and pressure relief valve to make the valve
operate freely. If the heater is installed in a closed
system, the temperature and pressure relief valve may
drip at times. If the temperature and pressure relief valve
discharges a full stream of water,have the system checked.
See “Pressure Build-Up in Water System” (Page 6). If the
temperature and pressure relief valve on the appliance
discharges periodically, this may be due to thermal
expansion in a closed water supply system (see “Pressure
Build-Up in Water System”). Contact the water supplier
or local plumbing inspector on how to correct this
It is recommended that a tempering valve be installed,
per the manufacturer’s instructions, for water heaters
supplying domestic hot water (See PAGE 8 for a sample
tempering valve installation).
TEMPERING VALVE INSTALLATION
situation. Do not plug the temperature and pressure
relief valve.
GENERAL INFORMATION
Water piping, ttings, and valves must be properly installed for the correct and safe operation of this water heater.
Please note the following:
The system should be installed only with piping that is suitable for potable (drinking) water such as
copper, CPVC, or polybutylene. PVC water piping may be used on the cold water inlet supply but not within
18 inches of the cold water connection on the water heater.
DO NOT use PVC piping on the hot water outlet, space heating supply, or space heating return.
DO NOT use any pumps, valves, or ttings that are not compatible with potable water.
DO NOT use valves that may cause excessive restriction to water ow. Use full ow ball or gate valves
only.
DO NOT use 50/50 tin-lead solder (or any lead based solder) in potable water lines.Use 95/5 solder or other
equivalent material.
DO NOT tamper with the thermostat, gas valve, blower, electrical components, or temperature and pressure
relief valve.Tampering with any of the components is dangerous and can result in death, severe injury, or
property damage.Tampering voids all warranties.ed technicians should service these
components.
DO NOT use this water heater as a replacement for an existing boiler installation.
DO NOT use with piping that has been treated with chromates, boiler seal, or other chemicals.
DO NOT add any chemicals to the system piping which will contaminate the potable water supply.
PRESSURE BUILDUP IN CLOSED
WATER SYSTEMS
The water utilities supply meter may contain a check
valve, back blow preventer, or water pressure reducing
valve.This will create a closed water system. During the
heating of the water, water expands creating a pressure
build-up in the water system. A temperature and pressure
relief valve, must be installed on the water heater (150 PSI
maximum pressure setting, seeTemperature and Pressure
Relief Valve-Figure 3). To prevent the temperature and
pressure relief valve from discharging hot water, a loss
of energy, and reduce the possible buildup of lime on the
water temperature and pressure relief valve seat.
An expansion tank must be installed on the cold water
supply line. For every 50 US gallons of stored water, the
expansion tank must have a minimum capacity of 1.5 US
gallons. See PAGE 9. It requires both T&P valves and
expansion tanks for closed systems.
The manufacturer of this water
heater will void the warranty if there
is a failure to install a properly sized
expansion tank.
8
SPACE HEATING
POTABLE WATER SYSTEM
Some water heater models are equipped with inlet/outlet tappings for use with space heating applications.
If this water heater is to be used to supply both space heating and domestic potable (drinking) water,the instructions listed
below must be followed:
Be sure to follow the manual(s) shipped with the air handler system.A properly installed flow control valve is
required to prevent thermo-siphoning.Thermo-siphoning is the result of a continuous flow of water through the air
handler circuit during the off cycle.
Weeping (blow off) of the temperature and pressure relief valve (T & P) or higher than normal water temperatures
are the first signs of thermo-siphoning.
The domestic hot water line from the water heater should be vertical past any tempering valve or supply line to
the air handler to remove air bubbles from the system. Otherwise, these bubbles will be trapped in the air handler
heat exchanger coil, reducing the efficiency.
DO NOT use this water heater as a replacement for an
existing boiler installation.
DO NOT use with piping that has been treated with
chromates, boiler seal or other chemicals.
DO NOT add boiler treatment or any chemicals to any
heat piping, since the piping contains potable water.
DO NOT use with PVC piping.
Water heaters, which will be used to supply potable water,
shall not be connected to any heating system or
components previously used with a non-potable water
heating appliance.
DO NOT use any pumps, valves, or fittings that are not
completely compatible with potable water piping.
DO NOT use valves that may cause excessive restriction
to water flow.
USE FULL FLOW BALL OR GATE VALVES ONLY.
DO NOT tamper with the thermostat, gas valve,
igniter control or temperature and pressure relief valve.
Tampering with any of these components is
DANGEROUS and can result in property damage or
severe injury.Tampering voids all warranties. Only quali-
fied personnel should service these components.
DO NOT use 50/50 solder in potable water lines.
IFTHE SPACE HEATING system requires water temperature
in excess of 120º F, a mixing valve or other means should
be installed in the domestic (potable) hot water supply to
limit the RISK OF SCALD INJURY. (See Figure 5)
Some Jurisdictions may require a backflow preventer in
the incoming cold water line to the water heater. In such
cases, the temperature and pressure relief valve on the
water heater may weep or relieve due to expansion of
the heated water.
A diaphragm-type expansion tank (such as TACO or
EXTROL) will normally eliminate this weeping condition.
Please read and follow the manufacturer’s instructions for
installation of such tanks.
Some jurisdictions may require a backflow preventer in the
incoming cold water line. This may cause the temperature
and pressure relief valve on the water heater to
discharge or weep due to expansion of the heated water.
A diaphragm-type expansion tank suitable for potable
water will normally eliminate this weeping condition.
Please read and follow the manufacturer’s instructions for
the installation of such tanks.
SUPPLY TO HEAT
EXCHANGER
SUGGESTED PIPING
ARRANGEMENT FOR
TOP CONNECTIONS
RETURN FROM HEAT EXCHANGER
TEMPERED POTABLE WATER
COLD WATER INLET
SHUT OFF
VALV E
NON SCALD TEMPERING VALVE
Figure 4. Combination Space Heating / Potable
Water Heating system
9
REQUIRED FOR DUAL
WATER TEMPERATURES
DRAIN
6" MAX. ABOVE DRAIN
HOT OUTLET
UNIONS
(OPTIONAL)
TEMPERED WATER
TO FIXTURES
COLD INLET
HEAT TRAP
TEMPERING VALVE
(ANTI SCALDING VALVE
SET TO 120°F OR LOWER)
COLD WATER
INLET VALVE
CHECK VALVE
**PRESSURE REDUCING VALVE
(IF REQUIRED)
THERMAL EXPANSION TANK
MAIN WATER
SUPPLY
MASSACHUSETTS: INSTALL A VACUUM
RELIEF IN COLD WATER LINE PER
SECTION 19 MGL 142.
OTHER AREAS CHECK LOCAL CODES.
NOTES:
**THE PRESSURE
REDUCING VALVE MUST
BE INSTALLED ONTHE
MAIN COLD WATER
INLET LINE TOTHE
STRUCTURE IN ORDER
TO REDUCE PRESSURE
IN THE ENTIRE WATER
SYSTEM.
DRAIN PAN
Figure 5.Water Piping Connections
Figure 6.Typical Two Water Heater Connection
142.
10
Figure 7.Typical Three Water Heater Connection
Figure 8.Typical Four Water Heater Connection
11
CLEARANCES AND
ACCESSIBILITY
Notice: Minimum
clearances from combustible
materials are stated on the
data plate located on the
front of the water heater.
The water heater is
certified for installation on a
combustible floor.
PLANT VIEW
SIDES: 4" MIN.
FOR SERVICE
FRONT: 24" MIN.
FOR SERVICE
BACK: 0"
TOP: 12" MIN.
FOR SERVICE
VENT: 0
SIDES: 4" MIN.
FOR SERVICE
Important: If installing over
carpeting, the carpeting must be
protected by a metal or wood
panel beneath the water heater.
The protective panel must
extend beyond the full width and
depth of the water heater by
at least 3 inches (76.2 mm) in
any direction, or if an alcove or
closeted installation, the entire
floor must be covered by the
panel.The panel must be strong
enough to carry the weight of
the heater when full of water.
CONDENSATE LINE:
Figure 9 may be used as a reference guide to locate the specific
clearance locations.A minimum of 24 inches of front Clearence and
4 inches on each side should be provided for inspection and service.
Important: DO NOT route the condensate drain in areas that are likely to freeze. Frozen condensate will block
the drain line and result in property damage or water heater malfunction.
A condensate traps/drain stem assembly has been supplied
with the water heater.This assembly must be installed
between the water heater and the exhaust outlet piping
to ensure proper operation of the water heater. To install,
follow the instructions attached to the drain.
CONDENSATE TRAP
ASSEMBLY
Note: The trap should be aligned
so that the exhaust pipe is in a
vertical position close to the surface
of the water heater.
All parts of the condensate trap are PVC (figure 10).
This assembly can be turned with the outlet of the tee
oriented as needed.
Once orientation direction is decided, glue the unglued
joints. Connect the remaining piping and run the
condensate drain line to a suitable drain.
CONDENSATE DRAIN
LINE Important: If required by local codes, install a condensate
neutralizer cartridge in the drain line.The drain line must
be routed to a suitable drain. If no drain is available or
the drain is above the level of the condensate line, install a
condensate pump that is resistant to the acidic condensate.
These pumps are available from local distributors. If the
pump is not resistant to acidic water, a condensate
neutralizer must be used ahead of the pump.
Figure 9. Minimum
Clearence Locations
Figure 10. Condesate Drain
12
1
2
15
The air inlet and exhaust outlet must
be installed with the following
minimum clearances (see Figure 13):
12 inches above grade or maximum
anticipated snow level.
12 inches from any opening through
which blue gases could enter the
structure.
4 feet horizontally and vertically from
gas or electric meters, gas regulators,
dryer vents,vent hoods,bathroom fan
exhaust, attic fans and air intake
turbines.
2 feet from an inside corner formed
by two exterior walls.
2 feet from porches, decks, overhangs
and other obstructions.
VENT TERMINATION
LOCATIONS
In addition to maintaining the minimum clearances, the vent should
terminate according to the following guidelines:
1. Do not expose any 3” x 2” reducers or bushings to outdoor ambient
temperatures.
2. The air inlet and exhaust outlet must not terminate under a patio,
deck or any covered area.
3. Do not terminate the vent near walkways or into alleys or other
publicly accessible areas.
4. Do not terminate the vent in an area where children or animals could
block pipes.
5. Do not locate the vent terminal too close to shrubs or bushes.
6. Caulk all cracks, seams and joints within 6 feet horizontally above and
below the vent.
7. For two pipe systems, combustion air inlet termination and exhaust
air termination must be located in the same pressure zone.
8. The vent for this appliance shall not terminate over public walways;
or near soffit vent or crawl space vents or other areas where
condensation or vapor could create a nuisance or hazard or cause
property damage or where condensate or vapor could cause
damage or be detrimental to the operation of regulators, relief valves
or other equipment.
Figure 12.Typical Vertical
DirectVent System Installation
90° EXHAUST TERMINAL
36 “ VENT SEPARATION
IN ANY DIRECTION
90° INTAKE TERMINAL
SUPPORT BRACKET
WATER HEATER
DRAIN PAN
EVERY 5’ MIN.
SUPPORT BRACKET
2” OR 3” PVC PIPE
This manual suits for next models
3
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