Use & Care Manual
With Installation Instructions for the Installer
iGate® Smart Tank
Equipped with Backup Heating Elements
For Installation with Geothermal Heat Pump Systems
50/85/105 Gallon
The purpose of this manual is twofold:
one, to provide the installer with the basic
directions and recommendations for the proper
installation and adjustment of the storage tank;
and two, for the owner–operator, to explain
the features, operation, safety precautions,
maintenance and troubleshooting of the storage
tank. This manual also includes a parts list.
It is imperative that all persons who are
expected to install, operate or adjust this
storage tank read the instructions carefully
so they may understand how to perform
these operations. If you do not understand
these instructions or any terms within it, seek
professional advice.
Any questions regarding the operation,
maintenance, service or warranty of this
storage tank should be directed to the seller
from whom it was purchased. If additional
information is required, refer to the warranty.
Do not destroy this manual. Please read
carefully and keep in a safe place for future
reference.
C
UL
LISTED
US
!
!
Recognize this symbol as an
indication of Important Safety
Information!
alifornia Proposition 65 Warning:
C
This product contains chemicals
known to the State of California to
cause cancer, birth defects or other
reproductive harm.
Safety Information
Safety Precautions. . . . . . . 3, 4
FOR YOUR RECORDS
Write the model, serial numbers, and installation details on the
back cover of the manual.
This information is located on the rating plate (silver label) on the
unit.
Staple sales slip or cancelled check here.
Installation Instructions
Location. . . . . . . . . . . . . . . . . . 5
Proof of the original purchase date is needed to obtain
service under the warranty.
Water Connections . . . . . . . . . 8
Electrical Connections. . . . . 10
Wiring Diagram. . . . . . . . . . 11
READ THIS MANUAL
Operating Instructions
Inside you will find many helpful hints on how to use and maintain
your storage tank properly. Just a little preventive care on your part
can save you a great deal of time and money over the life of your
storage tank.
Safety Controls . . . . . . . . . . 14
Water Temperature . . . . . . . . 14
You’ll find many answers to common problems in the Before You
Call For Service section. If you review our chart of Troubleshooting
Tips first, you may not need to call for service at all.
READ THE SAFETY INFORMATION
Care and Cleaning
Draining. . . . . . . . . . . . . . . . 16
Your safety and the safety of others are very important. There
are many important safety messages in this manual and on your
appliance. Always read and obey all safety messages.
Maintenance. . . . . . . . . . . . . 16
!
Extended Shut-Down. . . . . 16
Troubleshooting Tips
Before You Call
For Service. . . . . . . . . . . . . . 17
All safety messages will follow the safety alert symbol and
either the word “DANGER”, “WARNING”, “CAUTION” or
“NOTICE”.
These words mean:
An imminently hazardous situation ! DANGER
that will result in death or serious injury.
!
Customer Service
Element Replacement. . . . . 18
This is the safety alert symbol. Recognize this symbol
as an indication of Important Safety Information!
This symbol alerts you to potential hazards that can
kill or hurt you and others.
!
WARNING
A potentially hazardous situation that could result in death or serious injury and/or damage to property.
CAUTION A potentially hazardous situation that may result in minor or moderate injury.
Notice:
Attention is called to observe a specified procedure or maintain a specific condition.
2
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
DANGER!
WATER TEMPERATURE SETTING
Safety and energy conservation are factors to be considered when selecting the water temperature
setting of storage tank’s thermostat. Water temperatures above 125°F (51°C) can cause severe burns
or death from scalding. Be sure to read and follow the warnings outlined on the label pictured
below. This label is also located on the storage tank near the thermostat access panel.
Time/Temperature Relationship in Scalds
!
DANGER
Temperature
Time To Produce a Serious Burn
120°F (49°C)
125°F (51°C)
130°F (54°C)
135°F (57°C)
140°F (60°C)
145°F (63°C)
150°F (66°C)
155°F (68°C)
More than 5 minutes
1½ to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1½ seconds
About 1 second
Table courtesy of Shriners Burn Institute
HOT
BURN
Water temperature over 125°F can
cause severe burns instantly or
death from scalds.
Children, disabled and elderly are
at highest risk of being scalded.
See instruction manual before
setting temperature at water
heater.
Feel water before bathing or
showering.
Temperature limiting valves are
available, see manual.
NOTICE: Mixing valves are recommended for
reducing point of use water temperature by mixing
hot and cold water in branch water lines. Contact
a licensed plumber or the local plumbing authority
for further information. See page 9 for mixing valve
installation requirements.
The chart shown above may be used as a guide in determining the
proper water temperature for your home.
! DANGER: Households with small children, disabled, or
elderly persons may require a 120°F (49°C) or lower
thermostat setting to prevent contact with “HOT” water. This
unit is intended for use with auxiliary heating equipment. A
suitable mixing valve is recommended if lower temperatures
are desired.
When connected to the Geothermal Heat Pump System, the
temperature of the water in the storage tank is regulated
and adjusted by the primary electronic user interface of the
Geothermal Heat Pump system. Refer to the Geothermal
Heat Pump manufacturer's instructions on how to set the
water temperature using the electronic interface. The backup
electric heating elements of the Thermal Storage Tank Water
Heater will operate only when the
Geothermal Heat Pump System
alone cannot produce the desired
hot water temperature.
The temperature of the water in
the storage tank is regulated by
the adjustable surface mounted
thermostat(s) located behind the
jacket access panel(s) only when
the heating elements are used
to provide backup heating. To
comply with safety regulations the
thermostat(s) were set at 120°F
before the storage tank was shipped
from the factory.
!
ANGER: Hotter water increases the potential for Hot
D
Water SCALDS.
3
IMPORTANT SAFETY INFORMATION.
READ ALL INSTRUCTIONS BEFORE USING.
WARNING!
For your safety, the information in this manual must be followed to minimize the risk of
fire or explosion, electric shock, or to prevent property damage, personal injury, or loss of
life.
Be sure to read and understand the entire Use and Care Manual before attempting
to install or operate this storage tank. It may save you time and cost. Pay particular
attention to the Safety Instructions. Failure to follow these warnings could result in
serious bodily injury or death. Should you have problems understanding the instructions
in this manual, or have any questions, STOP, and get help from a qualified service
technician, or the local electric utility.
FOR INSTALLATIONS IN THE STATE OF CALIFORNIA
California Law requires that residential storage tanks must be braced, anchored or
strapped to resist falling or horizontal displacement due to earthquake motions. For
residential storage tanks up to 52 gallon capacity, a brochure with generic earthquake
bracing instructions can be obtained from: Office of the State Architect, 1102 Q Street,
Suite 5100, Sacramento, CA 95811 or you may call 916-445-8100 or ask a storage tank
dealer.
However, applicable local codes shall govern installation. For residential storage tanks of
a capacity greater than 52 gallons, consult the local building jurisdiction for acceptable
bracing procedures.
SAFETY PRECAUTIONS
Have the installer show you the location of the circuit breaker and how to shut it off if
necessary. Turn off the circuit breaker if the storage tank has been subjected to overheating, fire,
flood, physical damage or if the ECO (Emergency Cut Off) on the thermostat fails to shut off.
● Read this manual entirely before installing
or operating the storage tank.
● Use this appliance only for its intended
purpose as described in this Use and Care
Manual.
● Be sure your appliance is properly installed
in accordance with local codes and the
provided installation instructions.
of your storage tank unless it is specifically
recommended in this manual. All other
servicing should be referred to a qualified
technician.
● All replacement parts used on this
product must be manufacturer authorized
components.
● Do not attempt to repair or replace any part
READ AND FOLLOW THIS SAFETY INFORMATION
CAREFULLY.
SAVE THESE INSTRUCTIONS
4
Installing the storage tank.
Local Installation Regulations
This storage tank must be installed in
accordance with these instructions, local
codes, utility codes, utility company
requirements or, in the absence of local
codes, the latest edition of the National
Electrical Code. It is available from some
local libraries or can be purchased from
the National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269 as
booklet ANSI/NFPA 70.
If the storage tank is to be installed in a
restaurant, or other location where NSF
International listing is required, it must
be weather sealed to the floor, a raised
base, or on a shelf so that seepage cannot
accumulate under it; or elevated to provide
at least (6) inches of clearance from the
floor.
In order to meet NSF International
requirements for Standard 5, the base of the
storage tank must be sealed to the floor to
prevent seepage underneath. Apply a 3/8"
bead of RTV Silicone completely around
the floor edge of the base of the tank.
Thermal Storage Tank Requirements
This Thermal Storage Tank Water
Heater equipped with backup heating
elements, thermostats and high limit
is intended for installation with Geothermal Heat Pump Systems. Refer to
the Geothermal Heat Pump Systems
installation and operating instructions
for system installation and operation
requirements.
IMPORTANT
• Water piping and components connected to the water heater shall be suitable for use with potable water.
• Toxic chemicals such as those used
for boiler treatment MUST NOT be
introduced into the potable water.
• The water heater must not be connected to any system or component(s)
previously used with a non-potable
water heating appliance.
Location
NOTICE: DO NOT
use fittings on top of
the unit as handles or
lift points.
NOTICE: DO NOT
step or stand on water
connection fittings.
The location chosen for the storage
tank must take into consideration the
following:
can be removed to permit inspection and
servicing such as removal of the element or
checking controls.
This storage tank has two elements that
are intended for use with a Primary Heat
Source, for example a Heat Pump, as a
backup (supplemental) heating source only.
It should not be used as a primary heat
source.
The storage tank and water lines should
be protected from freezing temperatures.
Do not install the storage tank in outdoor,
unprotected areas or near any other
appliances where high temperatures are
present, such as wood burning stoves,
boilers, or furnaces. High temperatures can
warp or otherwise damage the non-metallic
construction of this storage tank.
Locate the storage tank in a clean dry area
as near as practical to the area of greatest
heated water demand. Long un-insulated
hot water lines can waste energy and water.
Place the storage tank in such a manner that
the thermostat and element access panels
Unit
Capacity
(Gallons)
50
85
105
Unit
Capacity
(Imperial Gallons)
42
71
88
Make certain the floor underneath the
storage tank is strong enough to sufficiently
support the weight of the storage tank once
it is filled with water.
Dimensions (Inches)
Height Diameter
66 3/4
70 1/4
70 3/4
23 1/2
28 1/4
30 1/4
Shipping Approximate
Weight
Full Weight
(lbs)
(lbs)
100
517
134
843
152
1,028
Height includes factory installed Temperature and Pressure Relief Valve.
5
Installing the storage tank
Thermal Expansion
Determine if a check valve exists in the
inlet water line. Check with your local
water utility. It may have been installed
in the cold water line as a separate back
flow preventer, or it may be part of a
pressure reducing valve, water meter or
water softener. A check valve located
in the cold water inlet line can cause
what is referred to as a “closed water
system”. A cold water inlet line with
no check valve or back flow prevention
device is referred to as an “open” water
system.
As water is heated, it expands in
volume and creates an increase in
the pressure within the water system.
This action is referred to as “thermal
expansion”. In an “open” water
system, expanding water which exceeds
the capacity of the storage tank flows
back into the city main where the
pressure is easily dissipated.
A “closed water system”, however,
prevents the expanding water from
flowing back into the main supply line,
and the result of “thermal expansion”
can create a rapid and dangerous
pressure increase in the storage tank
and system piping. This rapid pressure
increase can quickly reach the safety
setting of the relief valve, causing it
to operate during each heating cycle.
Thermal expansion, and the resulting
rapid and repeated expansion and
contraction of components in the
storage tank and piping system can
cause premature failure of the relief
valve, and possibly the heater itself.
Replacing the relief valve will not
correct the problem!
The suggested method of controlling
thermal expansion is to install an
expansion tank in the cold water line
between the storage tank and the
check valve (refer to the illustration
on page 9). The expansion tank is
designed with an air cushion built in
that compresses as the system pressure
increases, thereby relieving the over
pressure condition and eliminating the
repeated operation of the relief valve.
Other methods of controlling thermal
expansion are also available. Contact
your installing contractor, water supplier
or plumbing inspector for additional
information regarding this subject.
Inspect Storage tank
Inspect the storage tank for possible damage. Check the markings on the rating
plate of the storage tank to be certain the power supply corresponds to the
storage tank requirements.
Temperature and Pressure Relief Valve
NOTICE: The pressure
rating of the relief valve
must not exceed 150 PSI,
(1034 KPA), the maximum
working pressure of the
storage tank as marked on
the rating plate.
6
A new combination temperature and pressure relief valve, complying with
the Standard for Relief Valves and Automatic Gas Shut-Off Devices for Hot
Water Supply Systems, ANSI Z21.22, is supplied and must be installed in the
opening provided and marked for the purpose on the storage tank. No valve
of any type should be installed between the relief valve and the tank. Local
codes shall govern the installation of relief valves.
The BTUH rating of the relief valve must
not be less than the input rating of the
storage tank as indicated on the rating
label located on the front of the unit (1
watt=3.412 BTUH), OR the BTUH
capacity of the connected heat pump,
whichever is greater..
Connect the outlet of the relief valve to a
suitable open drain so that the discharge
water cannot contact live electrical parts
or persons and to eliminate potential
water damage.
Piping used should be of a type approved
for hot water distribution. The discharge
line must be no smaller than the outlet of
the valve and must pitch downward from
the valve to allow complete drainage (by
gravity) of the relief valve and discharge
line. The end of the discharge line should
not be threaded or concealed and should
be protected from freezing. No valve of
any type, restriction or reducer coupling
should be installed in the discharge line.
Vacuum Relief Valve
NOTICE: DO
NOT operate the
unit without the
vacuum relief valve
for any reason.
Doing so will void
the manufacturer’s
warranty.
The vacuum relief valve, which must
be used when installing the storage
tank, is factory installed.
The cold water inlet has a vacuum
relief valve connected to it. Certain
conditions in the field may produce a
vacuum or negative pressure condition
inside the storage tank. This negative
pressure can cause the tank to fail. The
vacuum relief valve provides a means
to eliminate the negative pressure or
vacuum by admitting air into the tank
to equalize the pressure.
It is not recommended to pull a vacuum
on the unit.
■■■✦■■■
Drain Pan
NOTICE: Auxiliary
catch pan MUST
conform to local codes.
NOTICE: Storage tank
must be centered in
drain pan.
The storage tank should not be
located in an area where leakage of
the tank or connections will result in
damage to the area adjacent to it or to
lower floors of the structure. Where
such areas cannot be avoided, it is
recommended that a suitable catch
pan, adequately drained, be installed
under the storage tank.
Under no circumstance will the
manufacturer be held liable for any
water damage in connection with
this storage tank.
Catch pan kits are available from
any storage tank or water heater
distributor.
B = Max 2″
B
A = Diameter of
storage tank
plus 2″ min.
A
To open drain, this line should be at least 3/4″ ID and
pitched for proper drainage.
Water Port Connections on Side of Unit
A 1-1/4” NPT water connection is
located on the sidewall of the tank.
DO NOT step or stand on water
connection fittings.
Teflon pipe tape or “dope” are
recommended for these connections.
The maximum flow rate through the 1
¼” port is 20 gpm.
Fittings must be held securely
(and not turn) during tightening /
installation / removal. Failure to do so
may result in catastrophic damage to
the storage tank.
It is recommended that threaded
unions be installed near the water
connection ports.
7
Installing the storage tank.
! WARNING: Failure
to follow the instructions
provided in this manual
may permanently
damage the unit and
void the manufacturer’s
warranty.
NOTICE: DO NOT attempt to turn any fitting
connected to the storage
tank union hex nuts that
are tightened.
NOTICE: The union hex
nut connections on the
unit use rubber seal rings
to provide the water tight
seal.
DO NOT use pipe sealant
on this joint.
DO NOT torque the union
hex nuts to over 35 ft-lbs
when reinstalling the components.
SOLDER WITH
CARE!!! If sweat
connections are
used, DO NOT apply
heat directly to any
component directly
connected to the unit.
Assemblies should be
built to a minimum
length of 12” before
attaching to any
connection on the unit
to avoid damaging the
unit.
8
Water Supply Connections on Top of Unit
Refer to the illustration on the
next page for suggested typical
installation. The installation of
unions or flexible copper connectors
is recommended on the hot and
cold water connections so that the
unit may be easily disconnected for
servicing if necessary. The HOT and
COLD water connections are clearly
marked on the top of the unit. Install
a shut-off valve in the cold water line
near the unit.
The hot water connection is provided
with a ¾” or 1” NPT connection
depending on the size of the storage
tank. A metal fitting should be used
for the connection to the unit at this
location. The hot water connection
contains a plastic cap to contain a
rubber seal ring that is used to form
a water tight connection. Take care
when removing the plastic cap so the
rubber seal ring is not lost. Be sure
the rubber seal ring is seated inside
the union hex nut before making the
final connection. DO NOT use pipe
sealant on this joint. DO NOT torque
the union hex nuts to over 35 ft-lbs
when reinstalling the components.
Hot and cold water lines may be
temporarily disconnected from the
unit to ease installation by loosening
the union hex nuts connecting the
fittings to the unit. The connection
of these parts to the unit use rubber
seal rings to form a water tight
connection. Re-use the rubber seal
rings that are provided with the unit
when re-installing these components.
Follow the instructions listed for the
hot water connection to reconnect the
union hex nuts.
Typical Installation - Thermal Storage Tank Water Heater
** Anti-Scald Valve
Hot Water Outlet
Cold Inlet Shut Off
Pre-solder 12" minimum stub pipes
before installing to unit.
Heat Trap 6"
Minimum
Cold Water
Inlet
Hot Water Outlet
Thermal Expansion
Tank (if required) See
thermal expansion
section on page 6.
Temperature & Pressure
Relief Valve
Seal Ring
(Inside nut)
Hex Union Nut
(Relief Valve)
* To Geothermal Heat Pump
Support the relief valve drain
pipe using metal strapping or
wire fastened to the structure
overhead
Union
(The addition of a union at this point will
help in the replacement of the T & P
Relief Valve should the need arise.)
Drain Pipe -(3/4" minimum)
From Heat Pump
No threads permitted on
end of Drain Pipe.
Drain Valve
Drain Pan
6” Maximum distance from
drain pipe to suitable open
drain.
* Refer to Geothermal Heat Pump Installation and Operating Manual for sizing information of pipe connecting to heat pump.
** High water temperatures can cause scalding injuries! The higher the water temperature the shorter the time required to scald. Water
temperatures above 125°F (51°C) can cause severe burns or death from scalding. Water temperatures higher than 120°F (49°C) should not
be available to showers, tubs, or hand lavatories. An anti-scald valve must be used when storage temperature exceeds 125°F (51°C).
9
Installing the storage tank.
! WARNING: The tank
must be full of water
before unit is turned on.
The storage tank
warranty does not cover
damage or failure
resulting from operation
with an empty or
partially empty tank.
! CAUTION: The presence
of water in the piping
and storage tank does not
provide sufficient conduction
for a ground. Non-metallic
piping, dielectric unions,
flexible connectors etc. can
cause the storage tank to be
electrically isolated.
To Fill the Storage tank
Make certain the drain valve is completely
closed.
Recirculate water from external heat
source.
Open the shut-off valve in the cold water
supply line.
A steady flow of water from the hot water
faucet(s) indicates a full storage tank.
Open each hot water faucet slowly to
allow the air to vent from the storage tank
and piping.
Refer to the Heat Pump Installation
Manual for instructions on bleeding air
from the piping to the heat pump.
Electrical Connections
A separate branch circuit with copper
conductors, over current protective device
and suitable disconnecting means must be
provided by a qualified electrician.
All wiring must conform to local codes
or latest edition of National Electrical
Code ANSI/NFPA 70.
The storage tank is completely wired to
the junction box inside jacket at the top
front of the storage tank. An opening for
1/2″ or 3/4″ electrical fitting is provided
for field wiring connections.
The voltage requirements and wattage load
for the storage tank are specified on the
rating plate on the front of the storage tank.
Route the low voltage control wires from
the heat pump through the cutout in the
junction box cover to the Communicating
Heat Pump connection.
The branch circuit wiring should
include either:
etallic conduit or metallic
M
sheathed cable approved for use as a
grounding conductor and installed
with fittings approved for the
purpose.
on-metallic sheathed cable,
N
metallic conduit or metallic sheathed
cable not approved for use as a
ground conductor shall include a
separate conductor for grounding. It
should be attached to the ground
terminals of the storage tank and the
electrical distribution box.
Line Voltage
Connections
Ground
Connection
Communicating
Heat Pump Connection 2
(route through the cutout
in the junction box cover)
Temperature
Sensors
Connection
(Refer to the Heat Pump
Installation Manual for
Communicating Heat
Pump connection details)
Junction Box at Top of Storage Tank
10
NOTICE: The thermistor wire assembly (not shown) is employed when a Goethermal Heat Pump System is connected to the Certified
Household Electric Water Heater. If an auxiliary control is installed, connect RED supply to RED connection on control board. The
auxiliary control shall be certified as a water heater control per UL 873 and/or UL 60730-1, as applicable.
Single Phase Wiring - 240V
Branch Circuit Sizing
Total Storage
tank Wattage
4,500
Minimum Circuit Ampacity (Amps)
Maximum Breaker Size (Amps)
25
30
! DANGER: Element should only be replaced with an element of the
same power rating that was factory installed, and corresponds to the
rating label on the unit.
Wiring Diagrams
240 Volt Single Phase
DOUBLE ELEMENT
WATER
TEMPERATURE
SENSOR
WATER
TEMPERATURE
SENSOR
11
Installing the storage tank.
Insulation Blankets
! WARNING: If local
codes require external
application of insulation
blanket kits the
manufacturer’s
instructions included with
the kit must be carefully
followed.
Insulation blankets, available to the
general public, for external use on electric
storage tanks are not necessary. The
purpose of an insulation blanket is to
reduce the standby heat loss encountered
with storage tank heaters.
The manufacturer’s warranty does not
cover any damage or defect caused by
installation, attachment or use of any type
of energy saving or other unapproved
devices into, onto or in conjunction with
the storage tank. The use of unauthorized
energy saving devices may shorten the life
of the storage tank and may endanger life
and property.
The manufacturer disclaims any
responsibility for such loss or injury
resulting from the use of such
unauthorized devices.
!
CAUTION: If local codes require
the application of an external
insulation blanket to this storage
tank, pay careful attention to the
following so as not to restrict the
proper function and operation of the
storage tank:
 Do not cover the operating or warning
labels attached to the storage tank or
attempt to relocate them on the exterior
of insulation blanket.
Do not apply insulation to the top of
the storage tank. This could interfere
with the safe operation of the electrical
junction box.
 Do not cover the jacket access panel
to the thermostat and heating element,
vacuum valve, or pressure and
temperature relief valve.
 Inspect the insulation blanket frequently.
12
Installation Checklist
A. Storage tank Location
❑ Close to area of heated water demand.
❑ Indoors and protected from freezing temperatures.
❑ Area free of flammable vapors.
❑ Provisions made to protect area from water ❑ Sufficient room to service unit.
damage.
B. Water Supply / Water Connection Ports
❑ Storage tank completely filled with water.
❑ Air purged from storage tank and piping.
❑ Water connections tight and free of leaks.
❑ Air purged from auxiliary heat source water
lines.
C. Relief Valve
❑ Temperature and Pressure Relief Valve
properly installed and discharge line run to open
drain.
❑ Discharge line protected from freezing.
D. Wiring
❑Power Supply voltage agrees with storage
tank rating plate.
❑Branch circuit wire and fusing or circuit
breaker of proper size.
❑Electrical connections tight and unit properly
grounded.
❑Communicating wiring to Heat Pump
properly connected.
13
Operating the storage tank.
Safety Precautions
o turn off power to storage tank if
D
it has been subjected to over heating,
fire, flood, physical damage.
unit must be completely filled with
The
water before turning on the power.
Do Not turn on storage tank unless
o Not turn on storage tank unless it
D
is filled with water.
F external heat source water supply
o Not turn on storage tank if cold
D
water supply shut-off valve is closed.
G The temperature of this storage tank
there is any difficulty in
If
understanding or following the
Operating Instructions or the
Care and Cleaning section, it is
recommended that a qualified person
or serviceman perform the work.
lines are purged.
may be controlled by the on-board
electric element thermostat(s) or heat
may be added to the tank from an
external heat source.
Maximum operating temperature of water
in the tank = 170° F.
Temperature & Pressure Safety Relief
valve opens at: 210° F, and/or 150 PSI.
Safety Controls
NOTICE: It is important
that the fiberglass
insulation is replaced to
maintain storage tank's
performance.
WARNING: If the
storage tank has been
subjected to flood, fire, or
physical damage, turn off
power and water to the
storage tank.
DO NOT operate the
storage tank again until
it has been thoroughly
checked by qualified
service personnel.
DANGER: There is a
hot water scald potential
if the thermostat is set
too high. Households
with small children,
disabled, or elderly
persons may require a
120°F (49°C) or lower
thermostat setting to
prevent contact with
HOT water.
!
The storage tank is equipped with a
combination thermostat and temperature
limiting control (ECO) that is located
above the heating element in the upper
control box. If for any reason the water
temperature becomes excessively high, the
temperature limiting control (ECO) breaks
the power circuit to the heating element.
Once the control opens, it must be reset
manually.
CAUTION: The cause of the high
temperature condition must be
investigated by qualified service
technician and corrective action must be
taken before placing the storage tank in
service again.
urn off the power to the storage
T
tank.
emove the jacket access panel and
R
insulation from the top control box.
he thermostat protective cover
T
should not be removed.
Press the red RESET button.
eplace the insulation and jacket
R
access panel before turning on the
power to the storage tank.
Water Temperature Setting
If this storage tank is being used in
conjunction with a Geothermal/Water
Source Heat Pump, refer to the heat pump
installation instructions for directions for
setting the storage tank temperature.
The temperature of the water in the
storage tank can be assisted and / or
regulated by setting the temperature of
the dial of the adjustable surface mounted
thermostat located behind the jacket
access panel.
Safety and energy conservation are factors
to be considered when selecting the water
temperature setting of the storage tank’s
thermostat. The lower the temperature
setting, the greater the savings in energy
and operating costs.
14
To reset the temperature limiting
control:
To comply with safety regulations the
thermostat was factory set at 120°F or less
where local codes require. These are the
recommended starting points.
Water temperatures above 125°F (51°C)
can cause severe burns or death from
scalding. Be sure to read and follow the
warnings outlined in this manual and on
the label on the storage tank. This label
is located on the storage tank near the
thermostat access panel.
Mixing valves for reducing point of use
water temperature by mixing hot and
cold water in branch water lines are
recommended. Contact a licensed plumber
or the local plumbing authority for further
information.
The chart on the next page may be used
as a guide in determining the proper water
temperature for your home.
If adjustment is necessary…
To increase the water temperature, it is recommended
to adjust the bottom thermostat only.
R
Thermostat dial
pointer
HIGH
HIGH
LOW
TURN OFF
POWER
BEFORE
SERVICING
LOW
MED
MED
TURN OFF
POWER
BEFORE
SERVICING
Thermostat
protective
cover
Top Thermostat
! DANGER: Make certain
power to the storage tank is
"OFF" before removing any
jacket access panel for any
reason. Failure to do so could
result in property damage,
bodily injury, or death.
Remove the snap-in access panel
cover. Insert finger into latch hole on
the bottom of the cover and push up to
release the latch. Pull forward and
remove the cover and insulation.
Reset button
ESE
T
T
R
ESE
To decrease water temperature, all thermostats on the
unit need to be adjusted to the lower setting.
Turn off the power to the storage tank.
emove the (4) screws that secure the
R
jacket access panel to the unit. Remove
the jacket access panel and insulation
exposing the thermostats. Use care
when removing insulation pads.
The thermostat protective cover should
not be removed.
Bottom Thermostat
LOW ≈ 90°F (32° C) Water Temperature
MED ≈ 120°F (49° C) Water Temperature
HIGH ≈ 150°F (66° C) Water Temperature
It is important that the fiberglass insulation is replaced
to maintain storage tank's performance and safety.
sing a small screwdriver, set the
U
thermostat dial pointer to the desired
temperature by turning the screw.
Do not pry or move the white plastic
pointer.
Replace the rectangular insulation and
thermostat access panel. Secure the
panel to the unit using the (4) screws
provided. Tighten the screws until only
snug.
eplace the access panel cover and
R
insulation and snap in position.
Turn on the power to the storage tank.
Time/Temperature Relationship in Scalds
Temperature
Time To Produce a Serious Burn
120°F (49°C)
125°F (51°C)
130°F (54°C)
135°F (57°C)
140°F (60°C)
145°F (63°C)
150°F (66°C)
155°F (68°C)
More than 5 minutes
11/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 11/2 seconds
About 1 second
Table courtesy of Shriners Burn Institute
15
Care and cleaning of the storage tank.
Draining the Storage tank
NOTICE: Additional
instructions for draining
the unit are located on
the storage tank.
Please reference the "To Fill
the Storage tank" section (see
page 10) for instructions on
how to refill the unit.
DANGER: Before
manually operating the
relief valve, make certain
no one will be exposed to
the danger of coming in
contact with the hot
water released by the
valve. The water may be
hot enough to create a
scald hazard. The water
should be released into a
suitable drain to prevent
injury or property
damage.
NOTICE: If the
temperature and pressure
relief valve on the hot
storage tank discharges
periodically, this may
be due to thermal
expansion in a closed
water system. Contact the
water supplier or your
plumbing contractor on
how to correct this. Do
not plug the relief valve
outlet.
Shut off power to the storage
tank.
Open a hot water faucet nearest
the storage tank. Run water
until cold.
Turn off the cold water supply
to the storage tank.
Leave the hot water faucet
open.
Attach a garden hose to the
drain valve on the bottom of the
storage tank and direct the hose
to a drain.
L
ift open the handle on the
relief valve, and leave open.
(top center fitting on storage
tank) (some water may be
released)
Open the drain valve.
Drain storage tank completely.
Close the drain valve.
Close the relief valve.
Routine Preventative Maintenance
Properly maintained, your storage tank
will provide years of dependable troublefree service.
It is suggested that a routine preventive
maintenance program be established and
followed by the user.
It is further recommended that a periodic
inspection of the operating controls,
heating element and wiring should be
made by service personnel qualified in
electric appliance repair.
Most electrical appliances, even when new,
make some sound when in operation. If the
hissing or singing sound level increases
excessively, the electric heating element
may require cleaning. Contact a qualified
installer or plumbing contract to inspect.
At least once a year, lift and release the
lever handle on the temperature pressure
relief valve, located near the top of the
storage tank, to make certain the valve
operates freely. Allow several gallons to
flush through the discharge line to an open
drain.
therefore not uncommon for hard water
deposits to accumulate in the bottom of
the tank. It is suggested that a few quarts/
liters of water be drained from the storage
tank every month to clean the tank of these
deposits.
Rapid closing of faucets or solenoid valves
in automatic water using appliances can
cause a banging noise heard in a water
pipe. Strategically located risers in the
water pipe system or water hammer
arresting devices can be used to minimize
the problem.
Water conditions can cause mineral
deposits to build up inside pipes. This
buildup can reduce the effectiveness of the
vacuum relief valve. The vacuum relief
valve should be replaced every six years.
A storage tank can act as a settling basin
for solids suspended in the water. It is
Vacation and Extended Shut-Down
If the storage tank is to remain idle for an
extended period of time, the power and
water to the appliance should be turned off
to conserve energy.
16
If the storage tank is installed in a
location where it could freeze when not
operational, all water must be drained
from the unit and piping If the tank is
full of water and freezes, the tank will
break. See the "Draining the Storage tank"
section for details on draining the unit.
Freeze damage is not covered under the
manufacturer's warranty.
After a long shut-down period, the
storage tank’s operation and controls
should be checked by qualified service
personnel. Make certain the storage tank is
completely filled again before placing it in
operation.
Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the chart on this page first and you may not need to call for
service.
Problem
Possible Causes
Rumbling noise
Water conditions in your home caused  R
emove and clean the heating elements.
Contact a qualified service technician.
a build up of scale or mineral deposits
on the heating element.
Relief valve producing popping
noise or draining
Pressure build up caused by thermal
expansion in a closed system.
Not enough or no
hot water
Geothermal/Water Source Heat Pump
is not operating properly
Water usage may have exceeded the
capacity of the storage tank.
A fuse is blown or a circuit breaker
tripped.
Electric supply may be off.
The thermostat may be set too low.
Leaking or open hot water faucets.
Electric service to your home may be
interrupted.
Improper wiring.
Manual reset limit (ECO).
Water is too hot
What to Do
 T
his is an unacceptable condition and
must be corrected. Contact the water supplier or plumbing contractor on how to
correct this. Do not plug the relief valve
outlet.
 C
onsult Troubleshooting section of Heat
Pump Installation Manual
 W
ait for the storage tank to recover after
an abnormal demand.
 R
eplace fuse or reset circuit breaker.
 M
ake sure electric supply to storage tank
and disconnect switch, if used, are in the
ON position.
 S
ee the Temperature regulation of the storage tank section of this manual.
 M
ake sure all faucets are closed.
 C
ontact the local electric utility.
 S
ee the Installing the storage tank section
of this manual.
 S
ee the Temperature regulation of the storage tank section of this manual.
 T
his is normal. The colder inlet water
takes longer to heat.
 R
eplace upper element.
Cold water inlet temperature may be
colder during the winter months.
Upper Element defective (no hot
water)
Lower Element defective (not enough  R
eplace lower element.
water)
The thermostat is set too high.
 S
ee the Temperature regulation of the storage tank section of this manual.
Covers and / or insulation missing.
 R
einstall covers and insulation.
! CAUTION: For your safety DO NOT attempt repair of electrical wiring, thermostats, heating
elements or other safety devices. Refer repairs to qualified service personnel.
17
Element Replacement Instructions
1. Turn off power to the unit.
! DANGER: Make certain power
to the storage tank is “OFF”
before removing any jacket access
panel for any reason. Failure to
do so could result in property
damage, bodily injury, or death.
2. Disable hot water heat pump (if applicable).
3. Open a hot water faucet and allow
water to flow until the water is cold.
4. Empty the water out of the unit by
following the instructions given in the
“Draining the Storage tank” section (see
page 16) of this manual.
5. Remove the snap-in access panel
cover. Insert finger into latch hole on
the bottom of the cover and push up
to release the latch. Pull forward and
remove the cover and insulation.
6. Remove the (4) screws that secure the
jacket access panel to the unit. Remove
the jacket access panel and insulation
exposing the thermostat and element.
Use care when removing the insulation
pads.
7. Flip up the bottom of the plastic
protector up to expose the head of the
heating element.
8. Loosen the terminal screws on the
element to disconnect the two wires
and slightly bend them away from the
element.
9. Remove temperature sensor
(thermistor) from element.
10. Using a wrench or socket to fit
the 1 7/8 inch hex nut, remove the old
element.
NOTICE: Make sure the threads on
the unit are clean. Brush debris off of
threads with a toothbrush if needed.
NOTICE: The elements are unique to
the upper and lower port. Make certain
the replacement element is correct for
the port into which you are installing it.
11. On the new element make certain
the element gasket is in place and not
twisted.
18
12. Thread the new element into the tank
and tighten with a wrench or socket to
13 – 15 ft-lbs.
NOTICE: Do not over tighten the
element. Do not apply torque over 18
ft-lbs.
13. Replace temperature sensor to the
new element. Torque to 11 in-lbs. Do
not over tighten the sensor.
14. Reconnect the two wires to the
element and tighten the terminal screws.
15. Reference the “To Fill the Storage
tank” section of this manual for
instructions on refilling the unit.
16. After the unit is completely filled
with water and under pressure, verify
the element is properly installed with no
water leakage.
17. Lower the protector to cover the
head of the heating element.
18. Replace the rectangular insulation
and thermostat access panel. Secure the
panel to the unit using the (4) screws
provided. Tighten the screws until only
snug.
19. Replace the access panel cover and
insulation and snap in position.
20. Turn on power to the storage tank.
FOR YOUR RECORDS
Owner Information
Name
Address
Dealer – Installer Information
Name
Address
Telephone Number
Address
Telephone Number
Storage tank Information
Name
19
REVISION HISTORY
Date
Page #
Description
06 July, 15
1
Added C-US-UL Listed Logo
21 March, 14
All
First Published
*97B0115N01*
97B0115N01
20
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