HTP SSC-35 Installation manual

120 Braley Rd. P.O. Box 429 East Freetown, MA 02717-0429 www.htproducts.com
LP-65 Rev. 1.30.12
SuperStor Contender
Indirect Fired
Water Heater
INSTALLATION
START-UP
MAINTENANCE
PARTS
SuperStor Contender
Water Heater Models
SSC-35 / SSC-50 / SSC-80 / SSC-119*
*NOTE: A suffix of “S” denotes Solar Model
NOTICE: 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.

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The following defined 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 death or serious injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not avoided,
may result in property damage.
FOREWORD
This manual is intended to be used in conjunction with other literature provided with the SuperStor Contender
Indirect Fired Water Heater. This includes all related control information. It is important that this manual, all other
documents included with this system, and additional publications, be reviewed in their entirety before beginning
any work.
Installation should be made in accordance with the regulations of the local code authorities and utility companies
which pertain to this type of water heating equipment.
FOR THE INSTALLER
This water heater must be installed by qualified and licensed personnel. The installer should be guided by the
instructions furnished with the water heater, and with local codes and utility company requirements.
INSTALLATIONS MUST COMPLY WITH:
Local, state, provincial, and national codes, laws, regulations and ordinances.
The latest version of the National Electrical Code, NFPA No. 70.
Code for the Installation of Heat Producing Appliances (latest version), from American Insurance Association, 85
John Street, New York, NY 11038.
This manual must only be used by a qualified heating installer/service technician. Read all instructions in this
manual before installing. Perform steps in the order given. Failure to comply could result in substantial property
damage, severe personal injury, or death.

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TABLE OF CONTENTS
PART 1 –GENERAL SAFETY INFORMATION .......................................................................................................4
A. PRECAUTIONS...................................................................................................................................................................4
B. WHEN SERVICING THE WATER HEATING SYSTEM.......................................................................................................4
C. HEATER WATER................................................................................................................................................................4
PART 2 –PREPARE THE WATER HEATER...........................................................................................................4
A. SPECIFICATIONS AND PERFORMANCE RATINGS.........................................................................................................5
B. PERFORMANCE AND SIZING GUIDELINES.....................................................................................................................6
C. LOCATING THE WATER HEATER.....................................................................................................................................6
D. ANODE ROD.......................................................................................................................................................................7
PART 3 –HEATER PIPING.......................................................................................................................................7
A. PLUMBING..........................................................................................................................................................................7
B. BOILER CONNECTIONS ....................................................................................................................................................7
C. COLD WATER INLET..........................................................................................................................................................8
D. SCALDING ..........................................................................................................................................................................8
E. TEMPERATURE AND PRESSURE RELIEF VALVE...........................................................................................................9
F. HOT WATER OUTLET ........................................................................................................................................................9
G. POTABLE EXPANSION TANK..........................................................................................................................................10
H. PRESSURE DROP SIZING FOR CIRCULATOR..............................................................................................................10
I. INSTALLATION DIAGRAMS...............................................................................................................................................11
PART 4 –HEATER CONTROL AND WIRING....................................................................................................... 16
A. CONTROL .........................................................................................................................................................................16
B. WIRING .............................................................................................................................................................................16
PART 5 –OPERATING THE HEATER .................................................................................................................. 16
PART 6 –MAINTENANCE AND TROUBLESHOOTING....................................................................................... 17
HTP CUSTOMER INSTALLATION RECORD FORM..................................................................................... 20

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PART 1 –GENERAL SAFETY INFORMATION
A. PRECAUTIONS
This water heater is approved for indoor installations only. Clearance to combustible materials: 0” top, bottom,
sides and back. Heater 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 water heater has been
approved for closet installation, and installation on combustible flooring. Do not install this water heater directly on
carpeting.
INSTALLER –Read all instructions in this manual before installing. Perform steps in the order given.
USER –This manual is for use only by a qualified heating installer/service technician. Have this heater
serviced/inspected by a qualified service technician annually.
FAILURE TO ADHERE TO THE GUIDELINES ON THIS PAGE CAN RESULT IN SUBSTANTIAL PROPERTY
DAMAGE, SEVERE PERSONAL INJURY, OR DEATH.
NOTE: If the heater is exposed to the following, do not operate until all corrective steps have been made by a
qualified serviceman:
1. FIRE
2. DAMAGE
3. WATER
Any claims for damage or shortage in shipment must be filed immediately against the transportation company by
the consignee.
DO NOT USE THIS WATER HEATER IF ANY PART HAS BEEN UNDERWATER. Immediately call a qualified
service technician. Replace any part of the control unit that has been under water.
B. WHEN SERVICING THE WATER HEATING SYSTEM
To avoid electric shock, disconnect electrical supply before performing maintenance.
To avoid severe burns, allow heater to cool before servicing.
C. 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 “heater patent medicines”. Damage to heater, substantial property
damage, and/or serious personal injury may result.
PART 2 –PREPARE THE WATER HEATER
UNCRATING HEATER –Any claims for damage or shortage in shipment must be filed immediately against the
transportation company by the consignee.
COLD WEATHER HANDLING –If the heater has been stored in a very cold location (BELOW 0oF) before
installation, handle with care until the plastic components come to room temperature.

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Remove all sides of the shipping crate to allow the heater to be moved into its installation location.
A. SPECIFICATIONS AND PERFORMANCE RATINGS
Figure 1 –Specifications and Dimensions

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B. PERFORMANCE AND SIZING GUIDELINES
Determine the amount of domestic hot water needed, then use the chart below to optimize water heater against
boiler sizing.
MODEL
GROSS BOILER
OUTPUT
140oF
90oF ΔT
127oF
77oF ΔT
115oF
65oF ΔT
SSC-35
53,000
112
125
152
SSC-50
86,000
190
213
258
SSC-80
91,000
198
221
270
SSC-119
108,000
268
300
364
Table 1
NOTE: Above chart is based on boiler size conforming to the minimum BTU/H required to achieve first hour
ratings. The mass of the boiler will affect recovery time. More boiler mass equals longer recovery time.
C. LOCATING THE WATER HEATER
This water heater is certified 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.
This water heater must be installed vertical on a level surface.
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 floors of the building. The water heater should be located near a floor
drain, or installed in a drain pan. HTP WILL NOT be held liable for leakage damages.
Figure 2
If you do not provide the minimum clearances shown, it might not be possible to service the heater without
removing it from the space.

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This water heater must not be located near flammable liquids such as gasoline, butane, liquefied 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.
D. ANODE ROD
This water heater is equipped with a magnesium anode rod. Anode rods are sacrificial components that
counteract water chemistry to minimize or eliminate tank corrosion.
The anode rod should be inspected annually and replaced as necessary to prolong tank life. Have the supply
water quality professionally analyzed, as local water conditions will influence the duration for inspection and
replacement of anode rod.
The use of a water softener may increase the speed of anode consumption. More frequent inspection of the
anode is needed when using softened or treated water.
Water with high sulfate and/or mineral content can produce a rotten egg odor in heated water. Chlorinating the
water supply may minimize this problem.
NOTE: Failure of a heat exchanger due to lime scale build-up on the heating surface, low pH or other imbalance
IS NOT covered by the warranty.
NOTE: Do not remove the anode rod from an operating water heater. Operating the water heater without the
anode rod will shorten the life of the tank and VOID the warranty.
PART 3 –HEATER 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 filling 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.
B. BOILER CONNECTIONS
Use two wrenches when tightening water piping at 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 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
flow direction. (See pressure drop sizing for circulator, this manual.) On the tank, the boiler return is to be
connected to the return side of the boiler. The return(s) from heating loop(s) should have a flow check or swing
check valve installed before the return pipe from the tank.

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In a steam boiler, the tank supply must be connected to the boiler well below the minimum water level. A strainer
and drain valve should be installed at the boiler for periodic draining of scale and sludge. Banging and steam
bound traps will occur if the boiler water supplied to the heat exchanger has steam or is slightly above the low
water cut off.
The water heater heat exchanger cannot be used with non-barrier radiant pipe systems. Use with closed loop
boiler systems only.
C. COLD WATER INLET
Use both thread tape and pipe dope to connect an NPT female x ¾” minimum pipe adapter.
Dielectric fittings must be used on water heater connections.
A shut off valve between the city water supply and tank inlet is recommended for ease of service.
Exercise caution when soldering water heater connections, as outlet and inlet dip tubes are plastic.
It may be recommended to use a back flow preventer –check local codes. If a back flow preventer or a 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 inlet pipe and hot
water outlet pipes for the water heater.
NOTE: DO NOT PLUG OUTLET IN TANKLESS COIL.
D. SCALDING
This 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 temperature. 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, you should install a mixing valve
in the water system. This valve will reduce point of
discharge temperature by mixing cold and hot water in
branch supply lines. Such valves are available from your local plumbing supplier.
APPROXIMATE TIME / TEMPERATURE
RELATIONSHIPS IN SCALDS
120oF
More than 5 minutes
125oF
1 ½ to 2 minutes
130oF
About 30 seconds
135oF
About 10 seconds
140oF
Less than 5 seconds
145oF
Less than 3 seconds
150oF
About 1 ½ seconds
155oF
About 1 second
Table 2

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Table 2 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.
E. TEMPERATURE AND PRESSURE RELIEF VALVE
A factory installed temperature and pressure relief valve long element, meeting the requirements for relief valves
for hot water heaters ANSI Z21.22B / CSA 4.4-M99, has been installed for your safety and convenience. If
servicing, make sure that the relief valve is sized to the BTU/hour capacity and storage capacity of the water
heater. If the relief valve weeps, see expansion tank section for suggestions.
Do not thread a cap or plug into the relief valve 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 floor 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 shutoff 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 filling 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 “off” 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.
F. HOT WATER OUTLET
Use both thread tape and pipe dope to connect an NPT male x ¾” (minimum) pipe adapter. A shut off valve
between the hot water supply and tank outlet is recommended for ease of service at a later date. Use a backflow
preventer specifically designed for water heater installations. This valve should be installed on the cold water fill
supply line per local codes.
Dielectric fittings must be used on water heater connections.

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Due to the plastic dip tube in the cold water inlet, exercise extreme caution when soldering.
A temperature limiting or mixing valve is not entirely necessary, but recommended in installations servicing
disabled or elderly persons, or children. Take extreme caution to avoid scalding when temperature limiting or
mixing valves are not used.
G. POTABLE EXPANSION TANK
A potable hot water expansion tank is required to offset heated water expansion. If there is a back flow preventer
or any other type of no return or check valve on 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 Typical Expansion Tank installation, Fig. 3, for more details.
H. PRESSURE DROP SIZING FOR CIRCULATOR
Use the chart below to properly calculate circulator flow rate for the installation. The flow chart below represents
the pipe run, water heater, and heat exchanger ONLY and does not include any flow checks, zone valves, or
friction loss through the boiler.
PRESSURE DROP FOR PIPE LENGTH OF 1” COPPER, AND FOR SIX 90oELBOWS, AND ON TEE ON THE
RUN
PIPE SIZE
20’
30’
40’
50’
60’
SSC-35
8 GPM
6.28
6.53
6.78
6.28
7.28
SSC-50
8 GPM
6.48
6.73
6.98
7.23
7.48
SSC-80
10 GPM
6.19
6.55
6.85
7.15
7.45
SSC-119
12 GPM
16.19
16.79
17.39
17.99
18.59
Table 3

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I. INSTALLATION DIAGRAMS
Figure 3

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Figure 4

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Figure 5

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Figure 6

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Figure 7

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PART 4 –HEATER CONTROL AND WIRING
A. CONTROL
A surface mounted control is provided and mounted inside of the control access compartment. There is an
insulation blanket under the control access cover to ensure accurate readings of water temperature. The control is
factory set at 120oF for your safety (see scald danger warning above). The differential is fixed at 3oto 5o(not
adjustable).
B. WIRING
Wiring is to be done in accordance with all applicable local and state codes. Turn off all power related to the boiler
starting and wiring procedures. It is recommended that a disconnect switch be installed between the boiler control
and water heater.
PART 5 –OPERATING THE HEATER
Boiler high limit should be 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 to satisfy the tank control.
We recommend a water heater temperature setting of 120oF. However, a lower temperature setting may be
required to comply with local and state codes for normal operation. The differential is fixed at 3 o to 5o. You may
prefer a setting of either higher or lower water temperature. A mixing valve in conjunction with a high temperature
setting may be used for high demand applications (spas, hot tubs, whirlpools).
If draining of the heater is necessary, open the temperature and pressure valve or a hot water tap to prevent
vacuum buildup in the tank and piping.
Risk of scald injury increases as you increase water temperature.

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PART 6 –MAINTENANCE AND TROUBLESHOOTING
Periodic maintenance should be performed by a qualified service technician to assure that all the equipment is
operating safely and efficiently. The owner should make necessary arrangements with a qualified heating con-
tractor for periodic maintenance of the heater. Installer must also inform the owner that the lack of proper care
and maintenance of the heater may result in a hazardous condition.
INSPECTION 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.
Functional
Test all functions of the system
Temperatures
*Verify safe settings on Anti-Scald Valve
ELECTRICAL
Smoke and CO
detector
*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.
ANODE ROD
Remove and visually inspect the anode rod. Anode rod
should be replaced when more than 6” of core wire is
exposed at either end of the rod.
RELIEF AND DRAIN VALVE
Relief Valve
Lift and release the relief valve on the water heater.
Make certain that the valve operates properly by
allowing several gallons to flush through the discharge
line. Replace if valve is blocked or does not operate
properly.
NOTE: DISCHARGED WATER MAY PRESENT A
SCALD RISK. TAKE CAUTION WHEN OPERATING
RELIEF VALVE.
Drain Valve
Open the drain valve and drain a few quarts of water
from the bottom of the tank to flush any hard water
deposits. Replace if valve is blocked or does not operate
properly.
NOTE: DRAINED WATER MAY PRESENT A SCALD
RISK. TAKE CAUTION WHEN OPERATING DRAIN
VALVE.
FINAL INSPECTION
Check list
Verify that you have completed entire check list.
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 FOURTH YEAR.
Table 4 - *If applicable to system.

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TROUBLESHOOTING
HOT WATER HAS A ROTTEN EGG ODOR
PROBLEM
POSSIBLE SOLUTION
Supply water has high sulfate or mineral content
Check with water quality specialist in your area. Have water
supply analyzed. Address water quality issues according to
specialist’s recommendations.
NO HOT WATER
PROBLEM
POSSIBLE SOLUTION
Zone valve not opening
Check or replace.
Circulator not operating
Check or replace
Tank control set too low
Raise tank temperature* (SEE NOTE BELOW)
Boiler control set too low
Raise boiler temperature
Wiring incorrect
Recheck wiring
Tank control failure
Replace control
Air trap in loop
Purge air
NOT ENOUGH HOT WATER
PROBLEM
POSSIBLE SOLUTION
Zone valve restriction
1” full bore replace zone valve
Circulator arrow reversed
Reverse circulator
Boiler temperature too low
Raise boiler temperature
Boiler sized too small
Check sizing chart
Tank sized too small
Check sizing chart
Demand flow rate too high
Check sizing chart
Install mixing valve, raise tank temperature*
Install flow regulator
Air trap in loop
Purge to remove air
Heat and tank come on together
Recheck wiring or coincidence
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
PROBLEM
POSSIBLE SOLUTION
Tank temperature too high
Lower temperature on tank
Water expands when heated
Install expansion tank
Water pressure too high
Install pressure reducing valve
HOT TUBS, SPAS, MULTIPLE SHOWERS, HIGH DEMAND
PROBLEM
POSSIBLE SOLUTION
Pressure too low
Check line pressure for restriction
Recovery of tank slow
Slow startup boiler. See chart.
Not enough hot water
Boiler sized too small. See chart.
Check flow rate and compare to chart
Demand too great. Check flow rates and compare to chart.
Install mixing valve and/or flow restricting valve and raise
tank and boiler temperature*.
Table 5

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Figure 8 –Parts Blowout

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HTP 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:
Installation Address:
Date of Installation:
Installer’s Code/Name:
Product Serial Number(s):
Comments:
Installer’s Phone Number:
Signed by Installer:
Signed by Customer:
IMPORTANT:
Customer: Please only sign after the installer has reviewed the installation, safety, proper operation, and
maintenance of the system. In the case that the system has any problems, please call the installer. If you are unable
to make contact, please contact your HTP Sales Representative.
Distributor/Dealer: Please insert contact details.
LP 65 REV. 1.30.12