Page 1
Installation
Start-Up
Maintenance
Parts
S
uperstor
Glass Lined
Storage Tanks
Warranty
For Residential and
Commercial Use
GL Models*
*Available in Metal Jacketed ASME and Non-ASME Models
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.
This manual must only be used by a qualied 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.
HTP reserves the right to make product changes or updates without notice and will not be held liable for
typographical errors in literature.
NOTE TO CONSUMER: PLEASE KEEP ALL INSTRUCTIONS FOR FUTURE REFERENCE.
120 Braley Road P.O. Box 429 East Freetown, MA 02717-0429 www.htproducts.com
lp-181 Rev. 3.3.15
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2
The following dened 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 storage tank. 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 ocial 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 ocer or
departmental ocial may be the AHJ.
NOTE: HTP, Inc. reserves the right to modify product technical
specications and components without prior notice.
For the Installer
This storage tank must be installed by qualied and licensed
personnel. The installer should be guided by the instructions
furnished with the storage tank, and by local codes and utility
company requirements.
Installations Must Comply With:
Local, state, provincial, and national codes, laws, regulations,
and ordinances.
Table of Contents
Part 1 - General Safety Information 2
A. When Servicing the Water Heating System 3
B. System Water 3
C. Freeze Protection 3
D. Water Temperature Adjustment 3
Part 2 - Prepare the Storage Tank 3
A. Locating the Storage Tank 3
B. Water Chemistry Requirements 4
C. Optional Equipment 4
Part 3 - Piping 5
A. Plumbing 5
B. Tankless Coil Connections 5
C. Hot Water Outlet 5
D. Temperature and Pressure Relief Valve 5
E. Potable Expansion Tank 6
F. Scalding 6
G. Application 7
Part 4 - Control and Wiring 7
A. Control 7
B. Wiring 7
C. Wiring Diagram 7
Part 5 - Start-Up and Operation 7
Part 6 - Maintenance and Troubleshooting 8
Five Year Limited Warranty 10
Customer Installation Record Form 12
Part 1 - General Safety Information
This storage tank is approved for indoor installations only
and is not intended for use in swimming pool applications.
Clearance to combustible materials: 0” top, bottom, sides,
and back. Tank must have room for service: 24” front and
6” sides are minimum recommended service clearances.
(A combustible door or removable panel is acceptable front
clearance.) This storage tank has been approved for closet
installation and installation on combustible ooring. Do
not install this storage tank directly on carpeting. Install the
storage tank 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 qualied heating
installer / service technician. Have this storage tank serviced /
inspected annually by a qualied service technician.
NOTE: Obey all local codes. Obtain all applicable permits
before installing the storage tank.
NOTE: Install all system components and piping in such a
manner that does not reduce the performance of any re
rated assembly.
NOTE: If the storage tank is exposed to the following, do not
operate. Immediately call a qualied service technician.
1. Fire
2. Damage
3. Water
Failure to adhere to these guidelines can result in substantial
property damage, severe personal injury, or death.
lp-181 Rev. 3.3.15
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3
High heat sources (sources generating heat 100oF / 37oC or
greater, such as stove pipes, space heaters, etc.) may damage
plastic components of the storage tank 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
storage tank and related components near high heat sources.
Do not use this storage tank for anything other than its
intended purpose (as described in this manual). Doing so
could result in property damage and WILL VOID product
warranty.
UNCRATING THE STORAGE TANK - Any claims for damage
or shortage in shipment must be led immediately against
the transportation company by the consignee.
A. When Servicing the Water Heating System
To avoid electric shock, disconnect electrical supply before
performing maintenance.
To avoid severe burns, allow storage tank and associated
equipment to cool before servicing.
B. System 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 storage tank, substantial property damage,
and/or serious personal injury may result.
C. Freeze Protection
NOTE: Consider piping and installation when determining
tank location. Place the storage tank as close to the boiler as
possible in a location not prone to freezing.
Failure of the storage tank due to freeze related damage IS
NOT covered by product warranty.
D. Water Temperature Adjustment
If the storage tank 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.
COLD WEATHER HANDLING - If the storage tank 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
storage tank.
A. Locating the Storage Tank
This storage tank is certied for indoor use only. DO NOT
INSTALL OUTDOORS. Outdoor installations ARE NOT covered
by warranty.
Choose a location for the storage tank as centralized to the
piping system as possible. Also, locate the storage tank and
domestic water piping where it will not be exposed to freezing
temperatures. All piping should be insulated. Additionally, place
the storage tank so that the drain, controls, and inlets/outlets
are easily accessible.
Locate the storage tank 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 storage
tank 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 eciency
keep the distance between the boiler and storage tank to a
minimum to reduce heat loss from excess piping and keep
friction loss at a minimum. Ensure all piping between the boiler
and storage tank is properly insulated to minimize heat loss.
The storage tank may be located some distance from the boiler
provided the circulator meets ow requirements. The greater
the distance from the boiler to the storage tank the longer the
response will be to a call for hot water.
This storage tank 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 storage tank
without removing it from the space.
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.
Part 2 - Prepare the Storage Tank
Remove all sides of the shipping crate to allow the tank to be
moved into its installation location.
This storage tank must not be located near ammable liquids
such as gasoline, butane, liqueed propane, adhesives, solvents,
paint thinners, etc., as the controls of this storage tank could
ignite these vapors and cause an explosion resulting in property
damage, severe personal injury, or death.
Ensure the location can support the entire lled weight of the
storage tank. Failure to properly support the storage tank could
result in property damage, severe personal injury, or death.
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RECOMMENDED SERVICE CLEARANCE
Figure 1 - Recommended Service Clearances
B. Water Chemistry Requirements
Chemical imbalance of the water supply may aect eciency
and cause severe damage to the storage tank and associated
equipment. HTP recommends having water quality
professionally analyzed to determine whether it is necessary to
install a water softener. It is important that the water chemistry
be checked before installing the storage tank, as water quality
will aect 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 storage tank.
Failure of a storage tank due to lime scale build-up, low pH, or
other chemical imbalance IS NOT covered by the warranty.
Outlined below are water quality parameters that need to be
met in order for the system to operate eciently 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 classied 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 storage tank. Operating temperatures above 135oF will
further accelerate the build-up of lime scale and may shorten
the service life of the storage tank.
Water that is classied as hard and very hard must be softened
to avoid storage tank failure.
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 aect 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 storage tank
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 storage tank.
The manufacturer of the storage tank 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. Storage tank failure
due to TDS in excess of 2000 ppm IS NOT covered by warranty.
Failure of a storage tank 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
C. Optional Equipment
Below is a list of optional equipment available from HTP:
• Aquastat Cover with BX and Line Cord (GL-50 Models
Only) Part # GL-KT1
• Aquastat Cover with BX, Line Cord, and Bronze Pump
(GL-50 Models Only) Part # GL-KT2
Part 3 - Piping
A. Plumbing
It is mandatory that all plumbing be done in accordance
with federal, local, and state plumbing codes and practices.
lp-181 Rev. 3.3.15
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N/A
12/11/14
(HOT OUTLET - 50 ONLY)
Failure to properly install the storage
tank WILL VOID the warranty. It is also
necessary to use both thread tape and
pipe dope on all mechanical plumbing
connections.
When lling the storage tank, open a
hot water tap to release air in the tank
and piping. Failure to do so could lead
to improper operation and damage to
components.
The use of heat, such as blow torches,
near the tank may cause distortion to
the high density polyethylene wrapper.
Such damage is NOT covered by
warranty. Exercise caution whenever
using heat sources near tank.
Dielectric ttings must be used on
water connections.
B. Tankless Coil Connections
Refer to dimensional information
chart (Figure 2) for correct tankless coil
connection size. On the tank, tankless
inlet is to be connected to a bronze
or stainless steel circulator with the
arrow pointing away from the tank and
toward the tankless coil. This pipe will
also have a tee for the cold supply to
the tankless coil. (An optional check
valve may be installed between the cold
supply line and circulator to prevent
short circulating the tankless coil. This
may cause poor supply pressure or noisy
operation, depending on the type of
installation.)
On the tank, tankless outlet, use both
thread tape and pipe dope and connect
a 3/4” NPT brass tee. On the run, install a
brass drain valve. In the branch, install a
3/4” (minimum) tube adapter and connect
Figure 2 - Specications and Dimensions
this to the hot tankless coil outlet on the
boiler.
See “Typical Installation”, Figure 3.
C. Hot Water Outlet
50 Gallon Storage Tanks: Use both thread tape and pipe dope
to connect a 3/4” NPT brass tee. In the run of the brass tee, install
a 3/4” NPT brass T&P long element for hot water storage tanks,
as required by local codes, but not less than a valve certied for
meeting the requirements for relief valves for water heaters
(ANSI Z21.22 and CAN1-4.4) by a nationally recognized lab that
maintains periodic inspection of production of listed equipment.
The T&P valve must be plumbed down, so discharge will exit
at least 6” above the structural oor and not contact any live
electrical parts. In the bottom of the tee (branch) vertically down,
install a 3/4” NPT x 3/4” (minimum) tube adapter. Then install two
3/4” (minimum) sweat street 90 degree elbows.
It may be recommended to use a back ow preventer - check
local codes. If a back ow preventer or no return valve is used,
5
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, disconnect coil plumbing and use the cold water
inlet and hot water outlet pipes for the water heater.
80 and 119 Gallon Storage Tanks: Use 2” NPT nominal pipe
size. A T&P port is included on 80 and 119 gallon tanks.
175 Gallon Storage Tanks: Use 2 1/2” NPT nominal pipe size. A
T&P port is included on 175 gallon tanks.
D. 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 certied as meeting the requirements
for relief valves for hot water heaters (ANSI Z21.22 and CAN
1-4.4) by a nationally recognized lab that maintains periodic
inspection of production listed equipment. Make sure the relief
lp-181 Rev. 3.3.15
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6
valve is sized to the BTU/Hour capacity of the boiler. 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.
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.
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.
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
qualied service technician to ensure that the product has not
been aected 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.
E. Potable Expansion Tank
A potable hot water expansion tank may be required to oset
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.
F. Scalding
A water heating
system 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 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.
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.
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
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LP-181-E
12/11/14
G. Application
Figure 3 - Typical Storage Tank Installation
PIPING NOTES:
1. Check valves are optional. Circulators may have Internal
Flow Checks (IFCs).
2. If a backow preventer or no return valve is installed a
thermal expansion tank suitable for potable water must be
sized and installed on the cold water inlet between the storage
tank and the backow preventer.
Part 4 - Control and Wiring
A. Control
A pre-wired surface mount thermostatic control is provided
on your storage tank. Temperature may be set by removing
lower cover screw and lower cover. 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 water
heating system before starting any wiring procedures. It is
recommended that a disconnect switch be installed between
the boiler control and storage tank.
When wiring the boiler and controls be sure to label all wires
to ease future maintenance. Wiring errors can cause improper
and dangerous operation.
Part 5 - Start-Up and Operation
1. Fill the storage tank by opening the cold water shut-o valve.
Make certain any drain valves are 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.
When lling the storage tank, open a hot water tap to release air
in the tank and piping to ensure proper storage tank operation.
Failure to ensure the storage tank is full before turning on the
system could result in damage to the water heating system
and 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.
3. After ensuring there are no leaks within the system, ush the
system to clear any soldering residue.
Draw at least three times the volume of the storage tank 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 storage tank to the desired temperature. Boiler high
limit should be set at least 20oF higher than the storage tank
temperature setting. 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 storage tank temperature setting of 120oF is recommended.
However, a lower temperature setting may be required to comply
with local and state codes for normal operation. 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 water heating system. Observe
operation. Ensure the boiler shuts down after the storage tank
set point is satised.
C. Wiring Diagram
Figure 4 - Wiring the Control
lp-181 Rev. 3.3.15
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Part 6 - Maintenance and Troubleshooting
Periodic maintenance should be performed by a qualied service technician to ensure all equipment is operating safely and
eciently. The owner should make necessary arrangements with a qualied heating contractor for periodic maintenance of the
water heating system. Installer must also inform the owner that the lack of proper care and maintenance may result in hazardous
conditions.
Annual Maintenance Activities Date Last Completed
System 1st Year 2nd Year 3rd Year 4th Year
Piping Check system piping for any sign of leakage; make sure pipes are properly
supported.
Visual Do a full visual inspection of all system components. Ensure all components
(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 *Verify safe settings on Mixing Valve (if installed in system).
Electrical
Smoke and CO
Detectors
Circuit Breakers Check to see that the circuit breaker is clearly labeled. Exercise circuit
Connections Check wire connections. Make sure they are tight.
Relief Valve
Relief Valve Lift and release the relief valve on the storage tank. Make certain that the
Final Inspection
Checklist Verify that you have completed the entire checklist. WARNING: FAILURE
Homeowner Review what you have done with the homeowner.
Initial and Date after Inspection / Service. Continue Inspections Annually beyond
the Fourth Year.
Table 2 - Maintenance Activities Checklist - *If Applicable to System
*Verify devices are installed and working properly. Change batteries if necessary.
breaker.
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.
TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH.
lp-181 Rev. 3.3.15
Page 9
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*
Control set too low Raise control 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
Circulator failure Replace circulator Air trap in loop
Heat and tank come on
together
Air trap in loop Purge air
Not enough space heat
Slow recovery
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
Water expands when heated Install expansion tank Tank recovery slow Slow startup boiler. See chart
Water pressure too high
Table 3 - Troubleshooting - *See scald warning below.
Install pressure reducing
valve
Not enough hot water
Install mixing valve. Raise tank
temperature
Purge air
Install ow regulator
Check wiring or set indirect as
priority over heating
Draw tank down and lower
thermostat. Recheck.
Boiler sized too small.
Consult chart.
Circulator head capacity too
low
Check line pressure for
restriction
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.*
9
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.
If draining of the storage tank is necessary, open the T&P valve
or a hot water tap to prevent vacuum buildup in the tank and
piping.
lp-181 Rev. 3.3.15
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Glass Lined Storage Tank
Five Year Limited Warranty
HTP warrants each glass lined storage tank 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
storage tank, and is non-transferable.
COVERAGE
A. This warranty covers the storage tank assembly ONLY. The
storage tank assembly consists of a storage tank, insulation, and
outer jacket.
B. 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 HTP representative, HTP will repair or replace the
defective or malfunctioning storage tank with a replacement storage
tank of the nearest compatible model available at the time of
replacement. It is expressly agreed between HTP and the original
consumer purchaser that repair or replacement are the exclusive
remedies of the original consumer purchaser.
C. If HTP is unable to repair or replace the storage tank so as to
conform to this warranty after a reasonable number of attempts,
HTP will provide, at its option, a replacement product. These
remedies are the consumer purchaser’s exclusive remedies for
breach of warranty.
D. 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 effective warranty period for
the storage tank shall then be ninety (90) days from the date of
manufacture of the storage tank and NOT the date of installation
of the storage tank.
E. This warranty extends only to storage tanks utilized in heating
applications that have been properly installed by qualified
professionals based upon manufacturer’s installation instructions.
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. 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.
5. Any failed components of the heat system not manufactured by
HTP as part of the storage tank.
6. Storage tanks repaired or altered without the prior written
approval of HTP.
7. Damages, malfunctions, or failures resulting from failure to install
the storage tank in accordance with applicable building codes/
ordinances or good plumbing and electrical trade practices; or
failure to operate and maintain the storage tank in accordance with
the manufacturer’s provided instructions.
8. Failure or performance problems caused by improper sizing of
the storage tank, expansion device, or piping.
9. Damages, malfunctions, or failures caused by abuse, accident,
fire, flood, freeze, lightning, acts of God and the like.
10. Tank failures (leaks) caused by operating the storage tank in a
corrosive or contaminated atmosphere.
11. Failure of the storage tank due to the accumulation of
solid materials, lime deposits, or water quality contrary to the
manufacturer’s 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.
12. Production of noise, taste, odors, discoloration, or rusty water.
13. Damages, malfunctions, or failures caused by subjecting the
tank to pressures greater than those on the rating label.
14. Storage tanks installed outside the fifty states (and the District
of Columbia) of the United States of America and Canada.
15. Storage tanks moved from the original installation location.
16. Storage tanks that have had their rating labels removed.
PROCEDURES FOR WARRANTY SERVICE REQUESTS
Any claim for warranty assistance must be made promptly.
Determine if the storage tank 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 storage tank is “in-warranty”, contact the retailer from whom
the storage tank 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 storage tank, in addition to explanation of your
storage tank problem.
Warranty coverage is subject to validation of “in-warranty” coverage
by HTP claims department personnel. All alleged defective
or malfunctioning parts must be returned to HTP via the local
distribution channels where original purchase was made. NOTE:
Any parts or tanks returned to HTP for warranty analysis will
become the property of HTP and will not be returned, even if credit
is denied.
If all warranty conditions are satisfied, HTP will provide replacement
parts to the retailer.
If you have questions about the coverage of this warranty, please
contact HTP at the address or phone number stated below:
WARRANTY EXCLUSIONS
This limited warranty will not cover:
1. Any storage tank purchased from an unauthorized dealer or
online retailer.
2. Any storage tank not installed by a qualified heating installer/
service technician.
3. Service trips to teach you how to install, use, maintain, or to
bring the storage tank installation into compliance with local building
codes and regulations.
4. Failure to locate the storage tank in an area where leakage of
the tank or water line connections and the combination temperature
and relief valve will not result in damage to the area adjacent to
the storage tank or lower floors of the structure.
lp-181 Rev. 3.3.15
HTP
P.O. Box 429
120 Braley Road
East Freetown, MA
02717
Attention: Warranty Service Department
1(800) 323-9651
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 storage tank or part(s). This warranty
does not extend to labor costs beyond the coverage specified in
Page 11
this warranty document. All such expenses are your responsibility.
LIMITATIONS OF YOUR HTP 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
HTP’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 HTP 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 HTP. UNLESS IN WRITING AND SIGNED BY
A DULY AUTHORIZED OFFICER OF HTP. THE WARRANTIES
STATED HEREIN ARE NOT TRANSFERABLE AND SHALL BE
FOR THE BENEFIT OF THE ORIGINAL PURCHASER ONLY.
11
NO OTHER WARRANTIES
Your HTP 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 storage
tank manufactured and sold by HTP. HTP neither assumes nor
authorizes anyone to assume for it any other obligation or liability
in connection with said storage tanks.
HTP reserves the right to change specifications or discontinue
models without notice.
lp-181 Rev. 3.3.15
Page 12
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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.
lp-181 Rev. 3.3.15
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