Westinghouse WI Models User manual

Indirect
Water Heaters
Installation
Start-Up
Maintenance
Parts
Warranty
For Residential and
Commercial Use
WI Models
This manual must only be used by a qualied installer / service technician. Read all instructions in this manual before
installing. Perform steps in the given order. Failure to do so could result in substantial property damage, severe
personal injury, or death.
Westinghouse reserves the right to make product changes or updates without notice and will not be held liable for
typographical errors in literature.
The surfaces of these products contacted by potable (consumable) water contain less than 0.25% lead by weight as
required by the Safe Drinking Water Act, Section 1417.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
whl-007 Rev. 1.12.16

whl-007 Rev. 1.12.16
2
The following dened terms are used throughout this manual
to bring attention to the presence of hazards of various risk
levels or to important product information.
DANGER indicates an imminently hazardous situation which,
if not avoided, will result in serious personal injury or death.
WARNING indicates a potentially hazardous situation which, if
not avoided, could result in personal injury or death.
CAUTION indicates a potentially hazardous situation which, if
not avoided, may result in moderate or minor personal injury.
CAUTION used without the safety alert symbol indicates
a potentially hazardous situation which, if not avoided, may
result in property damage.
NOTICE is used to address practices not related to personal
injury.
Foreword
This manual is intended to be used in conjunction with other
literature provided with the water heater. This includes all
related control information. It is important that this manual,
all other documents included in this system, and additional
publications including the Code for the Installation of Heat
Producing Appliances (latest version), be reviewed in their
entirety before beginning any work.
Installation should be made in accordance with the regulations
of the Authority Having Jurisdiction, local code authorities, and
utility companies which pertain to this type of water heating
equipment.
Authority Having Jurisdiction (AHJ) – The AHJ may be a federal,
state, local government, or individual such as a re chief, re
marshal, chief of a re prevention bureau, labor department
or health department, building ocial or electrical inspector,
or others having statutory authority. In some circumstances,
the property owner or his/her agent assumes the role, and
at government installations, the commanding ocer or
departmental ocial may be the AHJ.
NOTE: Westinghouse reserves the right to modify product
technical specications and components without prior notice.
For the Installer
This water heater must be installed by qualied and licensed
personnel. The installer should be guided by the instructions
furnished with the water heater, and by local codes and utility
company requirements.
Installations Must Comply With:
Local, state, provincial, and national codes, laws, regulations,
and ordinances.
Part 1 - General Safety Information
This water heater is approved for indoor installations only
and is not intended for use as a pool heater. Clearance to
combustible materials: 0” top, bottom, sides, and back. Heater
must have room for service: 24” front, 6” top, and 0” sides are
minimum recommended service clearances. (A combustible
door or removable panel is acceptable front clearance.) This
water heater has been approved for closet installation and
installation on combustible ooring. Do not install directly
on carpeting. Install the water heater in a location where
temperature and pressure relief valve discharge or a leak will
not result in damage to the surrounding area. If such a location
is not available, install an auxiliary catch pan.
Installer - Read all instructions in this manual before
installing. Perform steps in the given order.
User - This manual is for use only by a qualied heating
installer / service technician. Have this water heater serviced
/ inspected annually by a qualied service technician.
FAILURE TO ADHERE TO THESE GUIDELINES CAN
RESULT IN SUBSTANTIAL PROPERTY DAMAGE, SEVERE
PERSONAL INJURY, OR DEATH.
Table of Contents
Part 1 - General Safety Information 2
A. When Servicing the Water Heating System 3
B. Heater Water 3
C. Freeze Protection 3
D. Water Temperature Adjustment 3
Part 2 - Prepare the Water Heater 3
A. Locating the Water Heater 4
B. Water Chemistry Requirements 4
Part 3 - Piping 6
A. Plumbing 6
B. Boiler Connections 6
C. Domestic Piping Inlet 6
D. Auxiliary Connections 6
E. Temperature and Pressure Relief Valve 7
F. Scalding 7
G. Potable Expansion Tank 8
H. Pressure Drop Sizing For Circulator 8
I. Applications 9
Part 4 - Heater Control and Wiring 10
A. Control 10
B. Wiring 10
C. Wiring Diagrams 10
Part 5 - Start-Up and Operation 11
Part 6 - Maintenance and Troubleshooting 12
Limited Warranty 14
Customer Installation Record Form 16
NOTE: Obey all local codes. Obtain all applicable permits
before installing the water heater.
NOTE: Install all system components and piping in such a
manner that does not reduce the performance of any re
rated assembly.

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NOTE: If the water heater is exposed to the following, do not
operate. Immediately call a qualied service technician.
1. Fire
2. Damage
3. Water
Failure to follow this information could result in property
damage, severe personal injury, or death.
High heat sources (sources generating heat 100oF / 37oC or
greater, such as stove pipes, space heaters, etc.) may damage
plastic components of the water heater as well as plastic
vent pipe materials. Such damages ARE NOT covered by
warranty. It is recommended to keep a minimum clearance of
8” from high heat sources. Observe heat source manufacturer
instructions, as well as local, state, provincial, and national
codes, laws, regulations and ordinances when installing this
water heater and related components near high heat sources.
Do not use this water heater for anything other than its
intended purpose (as described in this manual). Doing so
could result in property damage and WILL VOID product
warranty.
A. When Servicing the Water Heating System
To avoid electric shock, disconnect electrical supply before
performing maintenance.
To avoid severe burns, allow water heater and associated
equipment to cool before servicing.
B. Heater Water
Do not use petroleum-based cleaning or sealing compounds in
a water heating system. Gaskets and seals in the system may
be damaged. This can result in substantial property damage.
Do not use “homemade cures” or “patent medicines”. Damage
to the water heater, substantial property damage, and/or
serious personal injury may result.
NOTICE FOR SINGLE-WALL HEAT EXCHANGER MODELS
Per the Uniform Plumbing Code:
Single-wall heat exchangers are permitted if they satisfy all of
the following requirements:
The heat exchanger medium is potable water or contains only
substances which are recognized as safe by the US Food and
Drug Administration (FDA).
The pressure of the heat exchanger medium is maintained less
than the normal minimum operating pressure of the potable
water system.
The equipment is permanently labeled to indicate that only
additives recognized as safe by the FDA shall be used as the
heat transfer medium.
Other heat exchanger designs may be permitted where
approved by the AHJ.
C. Freeze Protection
NOTE: Consider piping and installation when determining
heater location. Place the water heater as close to the boiler as
possible in a location not prone to freezing.
Failure of the water heater due to freeze related damage IS
NOT covered by product warranty.
In water heaters with single wall heat exchangers, the heat
transfer uid must be water or nontoxic food grade glycol,
FDA rated “generally recognized as safe” (GRAS) and having
a toxicity rating or class of 1, as listed in Clinical Toxicology
of Commercial Products, 5th edition. Ensure the system is
permanently labeled to indicate any additives used in the heat
transfer uid.
NEVER use any toxic chemical, including automotive, standard
glycol antifreeze, or ethylene glycol made for hydronic (non-
potable) systems. These chemicals can attack gaskets and seals
in water systems, are poisonous if consumed, and can cause
personal injury or death.
UNCRATING THE WATER HEATER - Any claims for damage
or shortage in shipment must be led immediately against
the transportation company by the consignee. Households with small children, disabled, or elderly persons
may require a 120oF or lower temperature setting to prevent
severe personal injury or death due to scalding.
Approximate Time / Temperature Relationships in Scalds
120oF More than 5 minutes
125oF 1 1/2 to 2 minutes
130oF About 30 seconds
135oF About 10 seconds
140oF Less than 5 seconds
145oF Less than 3 seconds
150oF About 1 1/2 seconds
155oF About 1 second
Table 1 - Approximate Time / Temperature Relationships in Scalds
Part 2 - Prepare the Water Heater
COLD WEATHER HANDLING - If the water heater has been
stored in a very cold location (BELOW 0oF) before installation,
handle with care until the components come to room
temperature. Failure to do so could result in damage to the
water heater.
Remove all sides of the shipping crate to allow the heater to be
moved into its installation location.
NOTE: A drain valve is included with the water heater.
D. Water Temperature Adjustment
If the water heater is going to have a set temperature above
120oF, you must use an ASSE 1017 rated mixing valve to avoid
severe burns or death from scalding temperatures.
DO NOT use this indirect water heater in steam applications.
Doing so will result in damage to the water heater. Such
damages ARE NOT covered by warranty.

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A. Locating the Water Heater
High heat sources (generating heat 100oF / 37oC or greater, such
as boiler ue pipes, space heaters, etc.) may damage plastic
components of the water heater as well as plastic vent pipe
materials. Such damages ARE NOT covered by warranty. It is
recommended to keep a minimum clearance of 8” from high
heat sources. Observe heat source manufacturer instructions,
as well as local, state, provincial, and national codes, laws,
regulations, and ordinances when installing this water heater
and related components near high heat sources.
This water heater is certied for indoor use only. DO NOT
INSTALL OUTDOORS. Outdoor installations ARE NOT covered
by warranty.
Choose a location for the water heater as centralized to the
piping system as possible. Also, locate the water heater and
domestic water piping where it will not be exposed to freezing
temperatures. All piping should be insulated. Additionally,
place the water heater so that the drain, controls, and inlets/
outlets are easily accessible.
Locate the water heater where any leakage from the relief valve,
related piping, tank, or connections will not result in damage
to surrounding areas or lower oors of the building. The water
heater should be located near a oor drain or installed in a drain
pan. Leakage damages ARE NOT covered by warranty.
NOTE: To save on heating costs and improve energy eciency
keep the distance between the boiler and water heater to a
minimum to reduce heat loss from excess piping and keep
friction loss at a minimum. Ensure all piping between the boiler
and water heater is properly insulated to minimize heat loss.
The water heater may be located some distance from the boiler
provided the circulator meets ow requirements through the
coil. The greater the distance from the water heater to the boiler
the longer the response will be to a call for hot water.
This water heater must be installed vertical on a level surface.
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. Visit http://www.dsa.dgs.ca.gov or call 1-916-445-8100
and request instructions.
However, applicable local codes shall govern installation.
For residential water heaters of a capacity of greater than 52
gallons, consult the local building jurisdiction for acceptable
bracing procedures.
NOTE: If you do not provide the minimum clearances shown
in Figure 1, it might not be possible to service the water heater
without removing it from the space.
NOTE: A combustible door or removable panel is acceptable
front clearance.
Ensure the location can support the entire lled weight of the
water heater. Failure to properly support the water heater could
result in property damage, severe personal injury, or death.
This water heater must not be located near ammable liquids
such as gasoline, butane, liqueed propane, adhesives,
solvents, paint thinners, etc., as the controls of this water
heater could ignite these vapors and cause an explosion
resulting in property damage, severe personal injury, or death.
Figure 1 - Recommended Service Clearances
RECOMMENDED SERVICE CLEARANCES
CATCH PAN DIMENSIONS
B. Water Chemistry Requirements
Chemical imbalance of the water supply may aect eciency
and cause severe damage to the water heater and associated
equipment. Westinghouse recommends having water quality
professionally analyzed to determine whether it is necessary to
install a water softener. It is important that the water chemistry
on both the domestic hot water and central heating sides are
checked before installing the water heater, as water quality
will aect the reliability of the system. In addition, operating
temperatures above 135oF will further accelerate the build-
up of lime scale and may shorten the service life of the water
heater. Failure of a water heater due to lime scale build-up,
low pH, or other chemical imbalance IS NOT covered by the
warranty.
This water heater must be installed upright in the vertical
position as described in this manual. DO NOT attempt to install
this water heater in any other orientation. Doing so will result
in improper water heater operation and property damage, and
could result in serious personal injury or death.

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Figure 2 - Specications and Dimensions
TOP
VIEW
The following are water quality parameters that need to be
met in order for the system to operate eciently for many
years.
Water Hardness
Water hardness is mainly due to the presence of calcium
and magnesium salts dissolved in water. The concentration
of these salts is expressed in mg/L, ppm, or grains per gallon
as a measure of relative water hardness. Grains per gallon is
the common reference used in the US water heater industry.
Hardness expressed as mg/L or ppm may be divided by 17.1
to convert to grains per gallon. Water may be classied as very
soft, slightly hard, moderately hard, or hard based on its hardness
number. The minerals in the water precipitate out as the water is
heated and cause accelerated lime scale accumulation on a heat
transfer surface. This lime scale build-up may result in premature
failure of the water heater. Operating temperatures above 135oF
will further accelerate the build-up of lime scale and may shorten
the service life of the water heater.
Water that is classied as hard and very hard must be softened to
avoid water heater failure.

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Part 3 - Piping
A. Plumbing
It is mandatory that all plumbing be done in accordance with
federal, local, and state plumbing codes and practices. Failure
to properly install the water heater WILL VOID the warranty. It
is also necessary to use both thread tape and pipe dope on all
mechanical plumbing connections.
When lling the water heater, open a hot water tap to release
air in the tank and piping. Failure to do so could lead to improper
water heater operation and damage to components.
DO NOT pipe this water heater with black iron, galvanized
steel, steel, or lead pipe. Doing so will result in premature
product failure and property damage, and WILL VOID the
product warranty.
B. Boiler Connections
Use two wrenches when tightening water piping at the
heater. Use one wrench to prevent the heater return or supply
line from turning. Failure to prevent piping connections from
turning could cause damage to water heater components.
Use a 1” nominal minimum pipe size when piping with zone
valves or circulators.
On the water heater, the boiler supply connects to the outlet
of the circulator. The circulator inlet is to be connected to the
hot outlet side of the boiler. Be sure that the arrow on the
circulator is facing the correct ow direction. (See pressure
drop sizing for circulator, this manual.) On the tank, the boiler
return connects to the return side of the boiler. The return(s)
from heating loop(s) should have a ow check or swing check
valve installed before the return pipe from the tank.
C. Domestic Piping Inlet
Never use dielectric ttings or galvanized steel ttings on
any domestic water connections. Use only copper or brass
ttings. Failure to do so will result in premature water heater
failure. Such failure IS NOT covered by warranty.
Use both thread tape and pipe dope to connect to the all
stainless steel 3/4” domestic inlet and outlet. A shut-o valve
between the city water supply and tank inlet is recommended
for ease of service.
It may be recommended to use a back ow preventer - check
local codes. If a back ow preventer or no return valve is used,
a thermal expansion tank must be installed on the cold water
supply between the tank and valve. If the tank is replacing a
tankless coil in the boiler, disconnect coil plumbing and use
the cold water inlet and hot water outlet pipes for the water
heater.
D. Auxiliary Connections
The auxiliary connections are additional connections for a
recirculation line. These connections must be installed in
accordance with all local and national codes or any applicable
standard that prevails. Auxiliary connections are 3/4” on
all models. Never use dielectric unions or galvanized steel
ttings. Use only copper or brass ttings. Sealant must be
used on all connections.
CLASSIFICATION MG/L OR PPM GRAINS/GAL
Soft 0 - 17.1 0 - 1
Slightly Hard 17.1 - 60 1 - 3.5
Moderately Hard 60 - 120 3.5 - 7
Hard 120 - 180 7 - 10.5
Very Hard 180 and over 10.5 and over
If the hardness of the water exceeds the maximum level of 7
grains per gallon, the water should be softened to a hardness
level no lower than 5 grains per gallon. Water softened as low
as 0 to 1 grain per gallon may be under-saturated with respect
to calcium carbonate, resulting in water that is aggressive and
corrosive.
pH of Water
pH is a measure of relative acidity, neutrality, or alkalinity.
Dissolved minerals and gases aect water pH. The pH scale
ranges from 0 to 14. Water with a pH of 7 is considered neutral.
Water with pH lower than 7 is considered acidic. water with a
pH higher than 7 is considered alkaline. A neutral pH (around
7) is desirable for most potable water applications. Corrosion
damage and tank failures resulting from water pH levels of
lower than 6 or higher than 8 ARE NOT covered by warranty.
The ideal pH range for water used in a water heater is 7.2 to 7.8.
Total Dissolved Solids
Total Dissolved Solids (TDS) is a measurement of all minerals
and solids dissolved in a water sample. The concentration of
TDS is usually expressed in parts per million (ppm).
Water with a high TDS concentration will greatly accelerate
lime and scale formation in the hot water system. Most high
TDS concentrations precipitate out of the water when heated.
This can generate a scale accumulation that will greatly reduce
the service life of the water heater.
The manufacturer of the water heater has no control over
water quality, especially TDS levels in your system. TDS in
excess of 2000 ppm will accelerate lime and scale formation
on the element or the heat exchanger. Water heater failure
due to TDS in excess of 2000 ppm IS NOT covered by warranty.
Failure of a water heater due to lime scale build-up IS NOT
covered by warranty.
Hardness: 7 grains
Chloride levels: 100 ppm
pH levels: 6 - 8
TDS: 2000 ppm
Sodium: 20 mG/L
Never connect auxiliary connections to any system that uses
glycol or other solutions formulated for hydronic systems.
These auxiliary connections are to be used only in a potable
water system. Failure to follow this warning could result in
severe personal injury or death.
DO NOT use this indirect water heater in steam applications.
Doing so will result in damage to the water heater. Such
damages ARE NOT covered by warranty.

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E. Temperature and Pressure Relief Valve
On all models, an appropriate temperature and pressure
(T&P) valve must be supplied and installed as detailed in the
piping diagrams in this installation manual.
Use both thread tape and pipe dope to install an NPT brass
T&P relief valve for hot water storage tanks, as required by
local codes but not less than valves certied as meeting the
requirements for relief valves for hot water heaters (ANSI
Z21.22 / CSA 4.4) by a nationally recognized lab that maintains
periodic inspection of production listed equipment. Make sure
the relief valve is sized to the BTU/Hour capacity of the water
heater. The T&P valve must be plumbed down so discharge
can exit at least 6” above the structural oor. The relief line
cannot be in contact with any live electrical parts. If the
relief valve constantly weeps install an expansion tank. See
expansion tank manufacturer’s instructions for suggestions.
To avoid water damage or scalding due to relief valve
operation:
• Discharge line must be connected to relief valve outlet
and run to a safe place of disposal. Terminate the
discharge line in a manner that will prevent possibility
of severe burns or property damage should the relief
valve discharge.
• Discharge line must be as short as possible and
the same size as the valve discharge connection
throughout its entire length.
• Discharge line must pitch downward from the valve
and terminate at least 6” above the oor drain, making
discharge clearly visible.
• The discharge line shall terminate plain, not threaded,
with a material serviceable for temperatures of 375oF
or greater.
• Do not pipe discharge to any location where freezing
could occur.
• No valve may be installed between the relief valve and
heater or in the discharge line. Do not plug or place
any obstruction in the discharge line.
• Test the operation of the relief valve after lling and
pressurizing the system by lifting the lever. Make sure
the valve discharges freely. If the valve fails to operate
correctly, immediately replace with a new properly
rated relief valve.
• Test T&P valve at least once annually to ensure the
waterway is clear. If valve does not operate, turn the
heater “o” and call a plumber immediately.
• Take care whenever operating relief valve to avoid
scalding injury or property damage.
FAILURE TO COMPLY WITH THE ABOVE GUIDELINES
COULD RESULT IN FAILURE OF RELIEF VALVE OPERATION,
RESULTING IN POSSIBILITY OF SUBSTANTIAL PROPERTY
DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.
Do not thread a cap or plug into the relief valve or relief
valve line under any circumstances! Explosion and property
damage, serious injury, or death may result.
RE-INSPECTION OF T&P RELIEF VALVES: T&P valves should
be inspected AT LEAST ONCE EVERY THREE YEARS, and
replaced if necessary, by a licensed plumbing contractor or
qualied service technician to ensure that the product has not
been aected by corrosive water conditions and to ensure that
the valve and discharge line have not been altered or tampered
with illegally. Certain naturally occuring conditions may corrode
the valve and its components over time, rendering the valve
inoperative. Such conditions can only be detected if the valve
and its components are physically removed and inspected.
Do not attempt to conduct an inspection on your own.
Contact your plumbing contractor for a re-inspection to assure
continued safety.
FAILURE TO RE-INSPECT THE T&P VALVE AS DIRECTED
COULD RESULT IN UNSAFE TEMPERATURE AND/OR
PRESSURE BUILD-UP WHICH CAN RESULT IN PROPERTY
DAMAGE, SERIOUS PERSONAL INJURY, OR DEATH.
F. Scalding
An ASSE 1017 or ASSE 1070 temperature limiting or mixing
valve is recommended in installations servicing disabled or
elderly persons, or children. Mixing valves do not eliminate the
risk of scalding.
To avoid scalding:
• Set the water heater set point temperature as low as
possible.
• Feel water before bathing or showering.
• If thermostatic valves are required, use devices
specically designed for such purpose. Install these
devices in accordance with instructions provided by the
manufacturer.
Failure to install a temperature limiting or mixing valve and
follow these instructions could result in property damage,
severe personal injury, or death due to scalds.
Approximate Time / Temperature Relationships in Scalds
120oF More than 5 minutes
125oF 1 1/2 to 2 minutes
130oF About 30 seconds
135oF About 10 seconds
140oF Less than 5 seconds
145oF Less than 3 seconds
150oF About 1 1/2 seconds
155oF About 1 second
Table 2 - Approximate Time / Temperature Relationships in Scalds

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8
This water heater can
deliver scalding water.
Be careful whenever
using hot water to
avoid scalding injury.
Certain appliances
such as dishwashers
and automatic clothes
washers may require
increased water
temperatures. By
setting the thermostat
on this heater to obtain
the increased water
temperature required
by these appliances you
may create the potential
for scald injury.
To protect against injury,
install a mixing valve
in the water system.
This valve will reduce point of use discharge temperatures by
mixing cold and hot water in branch supply lines. Such valves
are available from your local plumbing supplier.
G. Potable Expansion Tank
A potable hot water expansion tank may be required to oset
heated water expansion. If there is a back ow preventer
or any other type of no return or check valve in the system
a thermal expansion tank IS MANDATORY. The expansion
tank must be sized for the entire water volume of the hot
water system. A weeping relief valve indicates the need for
an expansion tank. See the Typical Expansion Tank example in
the Piping section for details.
H. Pressure Drop Sizing For Circulator
The boiler circulator ow rate must meet the requirements
found in the water heater specications, Part 2, this manual,
or the published ratings cannot be achieved. The ow chart
below represents the pipe run, water heater, and heat
exchanger ONLY and does not include any ow checks, zone
valves, or friction loss through the boiler. That resistance must
be added to the value found in the following chart.
Table 3 details the relationship of water temperature and
time with regard to scald injury and may be used as a guide
in determining the safest water temperature for your
applications.
Figure 3 - Pressure Drop through the Heat Exchanger

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9
I. Applications
INDIRECT
Figure 4 - Zoning with Zone Valves Figure 5 - Zoning with Circulators
Figure 6 - Typical Expansion Tank Application with Auxiliary Line
PIPING NOTES:
The following notes are applicable to all of
the piping applications demonstrated on
this page.
1. Minimum pipe size should match
connection size. Upsize pipe accordingly
if greater ow is required.
2. A thermal expansion tank suitable for
potable water must be sized and installed
within this piping system between the
backow preventer and the cold water
inlet.
3. All circulators should have an integral
ow check.
4. Drains and check valve between unit
and storage tank will assist in purging air
from system.
5. This drawing is meant to demonstrate
system piping only. The installer is
responsible for all equipment and detailing
required by local codes. In Massachusetts,
you must install a vacuum relief valve per
248 CMR.
6. Mixing valve application is optional, but
recommended to help prevent scalding.
See Part 3 for more information.

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10
Figure 7 - Thermostat Connection
Part 4 - Heater Control and Wiring
A. Control
A surface mount thermostatic control has been provided for
accurate temperature adjustment.
B. Wiring
Wiring is to be done in accordance with all applicable local
and state codes. Turn o all power related to the boiler before
starting any wiring procedures. It is recommended that a
disconnect switch be installed between the boiler control and
the water heater.
When wiring the water heater and controls be sure to label
all wires to ease future maintenance. Wiring errors can cause
improper and dangerous operation.
A thermostat connection has been provided on the top of the
water heater for easy wiring and accurate control. See Figure
7. Connect the wires from the thermostat to the terminals
marked + (Positive) or - (Negative).
C. Wiring Diagrams
Figure 8 - Wiring with Circulators
Figure 9 - Wiring with Zone Valves

whl-007 Rev. 1.12.16
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3. After ensuring there are no leaks within the system, ush the
system to clear any soldering residue. Many soldering uxes
contain Zinc Chloride, which can corrode stainless steel.
Draw at least three
times the volume of the
water heater to properly
ush the system.
4. Initiate a call for hot
water. Ensure each
zone valve or circulator
operates only when
its thermostat calls for
heat. Purge each zone
of air to ensure proper
operation.
5. Set the water
heater to the desired
temperature. Boiler
high limit should be set
at least 20oF higher than
the heater temperature.
Set the low limit of the
boiler control at the
minimum setting - this
will call the burner on only to satisfy the tank control.
A water heater temperature setting of 120oF is recommended.
However, a lower temperature setting may be required to
comply with local and state codes for normal operation. The
dierential should be set at 10 to 15oF. Installation conditions
may require a higher or lower temperature setting. A mixing
valve in conjunction with a high temperature setting may be
used for high demand applications (spas, hot tubs, whirlpools).
6. When the system is completely ushed, purged of air, and
the temperature is set, turn on the boiler. Observe operation.
Ensure the boiler shuts down after the indirect water heater set
point is satised.
1. Fill the water heater by opening the cold water shut-o valve.
Make certain the eld installed drain valve is completely closed.
Purge air from the system by opening a hot water outlet at a
xture in a kitchen or bathroom. When water ows freely from
the outlet, the system is purged.
Part 5 - Start-Up and Operation
When lling the water heater, open a hot water tap to release air
in the tank and piping to ensure proper water heater operation.
Failure to ensure the water heater is full before turning on the
system will result in damage to the water heater, and could
result in property damage. Such damages ARE NOT covered
by warranty.
2. Check the system for leaks.
Fix any leaks before continuing the installation. Failure to do so
could result in property damage or personal injury.
Risk of scald injury increases as you increase water
temperature.
Figure 10 - Replacement Parts
Item # Part # Description
1 6070P-035 Terminal Block w/ Screws
2
6070P-038 Dip Tube Cold Inlet - 30 Gal
6070P-039 Dip Tube Cold Inlet - 40 Gal
7700P-062 Dip Tube Cold Inlet - 50 Gal
6070P-041 Dip Tube Cold Inlet - 60 Gal
6070P-042 Dip Tube Cold Inlet - 80 and 100 Gal
3
6070P-044 Dip Tube Auxiliary Inlet - 30 Gal
6070P-045 Dip Tube Auxiliary Inlet - 40 and 60 Gal
6070P-046 Dip Tube Auxiliary Inlet - 50 Gal
6070P-047 Dip Tube Auxiliary Inlet - 80 Gal
6070P-048 Dip Tube Auxiliary Inlet - 100 Gal
4 TD1012 Thermostat
5 6060P-633 Mounting Clip
6 6060P-634 Protective Cover
7 H3000 Electric Access Panel
8 6075P-006 Screws (#8 Self-Threading)
9 6070P-009 Combination Drain Valve
Table 3 - Replacement Parts List

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Part 6 - Maintenance and Troubleshooting
Periodic maintenance should be performed by a qualied
service technician to ensure all equipment is operating safely
and eciently. The owner should make necessary arrangements
with a qualied heating contractor for periodic maintenance of
Annual Maintenance Activities Date Last Completed
Piping 1st Year 2nd Year 3rd Year 4th Year
Near heater piping Check heater and system piping for any sign of leakage; make sure
pipes are properly supported.
System
Visual Do a full visual inspection of all system components. Ensure all
components (including boilers, water treatment systems, mixing
valves, circulators, etc.) are operating properly and have been
maintained.
Functional Test all functions of the system. Perform any maintenance required
by local codes. Verify system pressure is in the safe operating range.
Temperatures Check control for temperature accuracy.
*Verify safe settings on Mixing Valve (if installed in system).
Electrical
Smoke and CO
Detectors
*Verify devices are installed and working properly. Change batteries
if necessary.
Circuit Breakers Check to see that the circuit breaker is clearly labeled. Exercise circuit
breaker.
Connections Check wire connections. Make sure they are tight.
Relief and DrainValve
Relief Valve Lift and release the relief valve on the water heater. Make certain
that the valve operates properly by allowing several gallons to ush
through the discharge line. Replace if valve is blocked or does not
operate properly.
NOTE: TAKE CAUTION WHEN OPERATING RELIEF VALVE.
DISCHARGED WATER MAY PRESENT A SCALD RISK.
Drain Valve Open the drain valve and drain a few quarts of water from the bottom
of the tank to ush any hard water deposits. Replace if valve is blocked
or does not operate properly.
NOTE: TAKE CAUTION WHEN OPERATING DRAIN VALVE. DRAINED
WATER MAY PRESENT A SCALD RISK.
Final Inspection
Check for
Combustibles
Check area around heater for combustible materials such as gasoline
or paint thinner. If combustible materials are found, move away from
the heater to a safe location.
Checklist Verify that you have completed the entire checklist. WARNING:
FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH.
Homeowner Review what you have done with the homeowner.
Initial and Date after Inspection / Service. Continue Inspections Annually beyond
the FourthYear.
Table 4 - Maintenance Activities Checklist - *If Applicable to System
the heater. Installer must also inform the owner that the lack
of proper water heater care and maintenance may result in
hazardous conditions.

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Troubleshooting
No Hot Water Not Enough Hot Water
Problem Possible Solution Problem Possible Solution
Zone valve not opening Open manually to replace Zone valve restriction 1” full bore replace zone valve
Circulator not operating Check or replace Circulator arrow reversed Reverse circulator
Tank control set too low Raise tank temperature* Tank temperature too low Raise tank temperature*
Boiler control set too low Raise boiler temperature Boiler temperature too low Raise boiler temperature
Wiring incorrect Check wiring Boiler sized too small Check sizing chart
Tank control failure Replace control Tank sized too small Check sizing chart
Zone valve failure Replace valve Demand ow rate too high Install mixing valve. Raise tank
temperature
Circulator failure Replace circulator Air trap in loop Purge air
Install ow regulator
Air trap in loop Purge air
Heat and tank come on
together
Check wiring or set indirect as
priority over heating
Draw tank down and lower
thermostat. Recheck.
Not enough space heat Boiler sized too small.
Consult chart.
Slow recovery Circulator head capacity too
low
T&P Valve Discharges Hot Tubs, Spas, Multiple Showers, High Demand
Problem Possible Solution Problem Possible Solution
Tank temperature too high Lower tank temperature Pressure too low Check line pressure for
restriction
Water expands when heated Install expansion tank Tank recovery slow Slow startup boiler. See chart
Water pressure too high Install pressure reducing
valve Not enough hot water
Boiler sized too small. See
chart
Check ow rate. Compare to
chart
Demand too great. Check ow
rates and compare to chart.
Install mixing valve and/or
ow restricting valve and raise
tank and boiler temperature.*
Table 5 - Troubleshooting - *See scald warning below.
If draining of the water heater is necessary, open the T&P
valve or a hot water tap to prevent vacuum buildup in the tank
and piping.
The risk of scald injury increases as you increase water
temperature. Use a water tempering or mixing valve and
extreme caution when using hot water to avoid scald
injury. Consult codes for conformance. Failure to follow the
instructions in this warning statement could result in serious
personal injury or death from scalds.

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Indirect Water Heater
Limited Warranty
For Residential and Commercial Use
Westinghouse warrants the indirect water heater and its parts
to be free from defects in materials and workmanship according
to the following terms, conditions, and time periods. UNLESS
OTHERWISE NOTED THESE WARRANTIES COMMENCE ON
THE DATE OF INSTALLATION. This limited warranty is only
available to the original owner of the indirect fired water heater,
and is non-transferable.
Residential Use Warranty (1 year – Parts, 10 years – Tank)
“Residential” setting shall mean water heater usage in a single
family dwelling, or usage in a multiple family dwelling, provided that
the water heater services only one (1) dwelling in which the original
consumer purchaser resides on a permanent basis and operating
temperatures do not exceed 140oF.
Commercial Use Warranty (1 year – Parts, 5 years – Tank)
Water heaters used in a commercial setting shall mean any usage
not falling within the definition of a “residential” setting.
COVERAGE
A. During the first year after the original date of installation in the
dwelling, Westinghouse warrants that it will repair or replace, at its
option, any defective or malfunctioning component of the indirect
fired water heater. It is expressly agreed between Westinghouse
and the original consumer purchaser that repair or replacement are
the exclusive remedies of the original consumer purchaser.
B. 1. Residential Use - During the second through tenth year after
the original date of installation of the water heater, Westinghouse
will repair or replace, at its option, any water heater having a
defect or malfunction that results in a water leak from the outside
jacket, inner tank, or heat exchanger as a result of normal use
and service. It is expressly agreed between Westinghouse and
the original consumer purchaser that repair or replacement are the
exclusive remedies of the original consumer purchaser.
2. Commercial Use - During the second through fifth years after
the original date of installation, Westinghouse will repair or replace,
at its option, any water heater having a defect or malfunction
that results in a water leak from the outside jacket, inner tank,
or heat exchanger as a result of normal use and service. It is
expressly agreed between Westinghouse and the original consumer
purchaser that repair or replacement are the exclusive remedies of
the original consumer purchaser.
C. Should a defect or malfunction result in a leakage of water
within the above-stated warranty periods due to defective material
or workmanship, malfunction, or failure to comply with the above
warranty, with such defect or malfunction having been verified by an
authorized Westinghouse representative, Westinghouse will replace
the defective or malfunctioning water heater with a replacement
water heater of the nearest compatible model available at the time
of replacement.
D. If Westinghouse is unable to repair or replace the water heater
so as to conform to this warranty after a reasonable number of
attempts, Westinghouse will provide, at its option, a replacement
product. These remedies are the consumer purchaser’s exclusive
remedies for breach of warranty.
E. Replacement water heater will be warranted for the unexpired
portion of the applicable warranty period of the original water heater.
F. If government regulations, industry certification, or similar
standards require the replacement water heater or part(s) to
have features not found in the defective water heater or part(s),
the owner will be charged the difference in price represented by
those required features. If the owner pays the price difference for
those required features and/or to upgrade the size and/or other
features available on a new replacement water heater or part(s),
the owner will also receive a complete new limited warranty for that
replacement water heater or part(s).
G. If at the time of a request for service the original consumer
purchaser cannot provide a copy of the original sales receipt or
the warranty card registration, the warranty period for the water
heater shall then be ten (10) years (Residential Use), or five (5)
years (Commercial Use), from the date of manufacture of the water
heater and NOT the date of installation of the water heater.
H. This warranty extends only to indirect fired water heaters utilized
in heating applications that have been properly installed by qualified
professionals based upon manufacturer’s installation instructions.
I. Replacement parts will be warranted for 90 days.
OWNER RESPONSIBILITIES
To avoid the exclusion list in this warranty, the owner or installer
must:
1. Have a vacuum relief valve and temperature and pressure
relief valve bearing the listing marks of the American Society of
Mechanical Engineers (ASME) installed with the storage tank
assembly in accordance with federal, state, and local codes.
2. Operate the storage tank assembly at pressure below that shown
on the rating plate on the pressure relief valve.
3. Keep the storage tank free of damaging scale deposits.
4. Use the water heater in an open system, or in a closed system
with a properly sized and installed thermal expansion tank.
5. Make provisions so if the storage tank or any component part or
connection thereto should leak, the resulting flow of water will not
cause damage to the area in which it is installed.
WARRANTY EXCLUSIONS
This limited warranty will not cover:
1. Any water heater purchased from an unauthorized dealer or
online retailer.
2. Any water heater not installed by a qualified heating installer/
service technician.
3. Service trips to teach you how to install, use, maintain, or bring
the water heater installation into compliance with local building
codes and regulations.
4. Failure to locate the water heater in an area where leakage of
the tank or water line connections and the combination temperature
and pressure relief valve will not result in damage to the area
adjacent to the water heater or lower floors of the structure.
5. Any failed components of the heat system not manufactured by
Westinghouse as part of the water heater.
6. Water heaters repaired or altered without the prior written
approval of Westinghouse.
7. Damages, malfunctions, or failures resulting from failure to install
the water heater in accordance with applicable building codes/
ordinances or good plumbing and electrical trade practices; or
failure to operate and maintain the water heater in accordance with
the manufacturer’s provided instructions.
8. Failure or performance problems caused by improper sizing of
the water heater, expansion device, or piping.
9. Damages, malfunctions, or failures resulting from improper
installation or failure to operate the water heater at pressures not
exceeding the working pressure shown on the rating plate.
10. Failure to operate the water heater in an open system, or in a
closed system with a properly sized and installed thermal expansion
tank.
11. Damages, malfunctions, or failures caused by abuse, accident,
fire, flood, freeze, lightning, acts of God and the like.
12. Tank failures (leaks) caused by operating the water heater in a
corrosive or contaminated atmosphere.
13. Failure of the heater due to the accumulation of solid materials,
lime deposits, or water quality contrary to the manufacturer’s

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provided instructions. WATER CHEMISTRY REQUIREMENTS
– Sodium less than 20mGL. Water pH between 6.0 and 8.0.
Hardness less than 7 grains. Chlorine concentration less than 100
ppm.
14. Any damages, malfunctions, or failures resulting from the use
of dielectric unions.
15. Components of the water heater that are not defective, but must
be replaced during the warranty period as a result of reasonable
wear and tear.
16. Production of noise, taste, odors, discoloration, or rusty water.
17. Damages, malfunctions, or failures caused by subjecting the
tank to pressures greater than those on the rating label.
18. Water heaters moved from the original installation location.
19. Water heaters that have had their rating labels removed.
20. Water heaters used in steam boiler applications.
PROCEDURES FOR WARRANTY SERVICE REQUESTS
Any claim for warranty assistance must be made promptly.
Determine if the water heater is “in-warranty” (that is, within the
applicable warranty period) by reviewing a copy of the original
sales receipt. You must present a copy of the original sales receipt
for a warranty service request.
If your water heater is “in-warranty”, contact the retailer from whom
the water heater was purchased (or the installer) for assistance.
Be prepared to provide the retailer or installer with a copy of your
original receipt, complete model and serial numbers, and the date
of installation of your water heater, in addition to explanation of your
water heater problem.
Warranty coverage is subject to validation of “in-warranty” coverage
by Westinghouse claims department personnel. All alleged defective
or malfunctioning parts must be returned to Westinghouse via the
local distribution channels where original purchase was made.
NOTE: Any parts or heaters returned to Westinghouse for warranty
analysis will become the property of Westinghouse and will not
be returned, even if credit is denied. If all warranty conditions
are satisfied, Westinghouse will provide replacement parts to the
retailer.
If you have questions about the coverage of this warranty, please
contact Westinghouse at the phone number stated below:
1-774-417-6000
SERVICE, LABOR AND SHIPPING COSTS
This limited warranty does not extend to any shipping charges,
delivery expenses, or administrative fees incurred by the purchaser
in repairing or replacing the water heater or part(s). This warranty
does not extend to labor costs beyond the coverage specified in
this warranty document. All such expenses are your responsibility.
LIMITATIONS OF YOUR Westinghouse WARRANTY AND
REMEDIES
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND ARE
GIVEN AND ACCEPTED IN LIEU OF ANY AND ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT
LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE AND ANY
OBLIGATION, LIABILITY, RIGHT, CLAIM OR REMEDY IN
CONTRACT OR TORT, WHETHER OR NOT ARISING FROM
WESTINGHOUSE’S NEGLIGENCE, ACTUAL OR IMPUTED. THE
REMEDIES OF THE PURCHASER SHALL BE LIMITED TO THOSE
PROVIDED HEREIN TO THE EXCLUSION OF ANY OTHER
REMEDIES INCLUDING WITHOUT LIMITATION, INCIDENTAL
OR CONSEQUENTIAL DAMAGES, SAID INCIDENTAL AND
CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED
TO, PROPERTY DAMAGE, LOST PROFIT OR DAMAGES
ALLEGED TO HAVE BEEN CAUSED BY ANY FAILURE OF
WESTINGHOUSE TO MEET ANY OBLIGATION UNDER THIS
AGREEMENT INCLUDING THE OBLIGATION TO REPAIR AND
REPLACE SET FORTH ABOVE. NO AGREEMENT VARYING OR
EXTENDING THE FOREGOING WARRANTIES, REMEDIES OR
THIS LIMITATION WILL BE BINDING UPON WESTINGHOUSE.
UNLESS IN WRITING AND SIGNED BY A DULY AUTHORIZED
OFFICER OF WESTINGHOUSE. THE WARRANTIES STATED
HEREIN ARE NOT TRANSFERABLE AND SHALL BE FOR THE
BENEFIT OF THE ORIGINAL PURCHASER ONLY.
NO OTHER WARRANTIES
Your warranty gives you specific legal rights, and you may also
have other rights that vary from state to state. Some states do
not allow the exclusion or limitation of incidental or consequential
damages so this limitation or exclusion may not apply to you. These
are the only written warranties applicable to the Indirect Fired Water
Heater manufactured and sold by Westinghouse. Westinghouse
neither assumes nor authorizes anyone to assume for it any other
obligation or liability in connection with said Indirect Fired Water
Heaters. Westinghouse reserves the right to change specifications
or discontinue models without notice.

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Customer Installation Record Form
The following form should be completed by the installer for you to keep as a record of the installation in case of a warranty
claim. After reading the important notes at the bottom of the page, please also sign this document.
Customer’s Name
Date of Installation
Installation Address
Product Name / Serial Number(s)
Comments
Installer’s Code / Name
Installers Phone Number
Signed by Installer
Signed by Customer
IMPORTANT
Customer: Please only sign after the installer has fully reviewed the installation, safety, proper operation, and maintenance of the system.
If the system has any problems please call the installer. If you are unable to make contact, please call your sales representative.
Distributor / Dealer: Please insert contact details.