Heat Transfer Solar User manual

#23680 Rev 1 2/10
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause serious
injury or property damage. Refer to this
manual. For assistance or additional
information, consult a qualified installer or
service agency.
CAUTION
The recommended temperature for normal
residential use is 120°F. The dial on the
aquastat does not always reflect the out-
coming water temperature, which could
occasionally exceed 120°F. The variation in
out-coming temperature could be based on
factors including but not limited to usage
patterns and type of installation. Test your
water at the tap nearest to the water heater.
WARNING
Hotter water increases the risk of scald injury.
Before adjusting the water temperature setting,
read this instruction manual. Temperatures at
which injury occurs vary with the person’s age
and the length of exposure.
The slower reaction time of children, elderly,
and physically or mentally challenged persons
increases the scalding hazard to them. It is
recommended that lower water temperatures
be used where these exposure hazards exist.
Such households may require a temperature
setting less than 120°F to prevent accidental
contact with hot water.
To lower water temperature use point-of-use
temperature limiting devices.
WARNING
Water heater blankets are not recommended
and will void the warranty.
THIS MANUAL HAS BEEN PREPARED
TO ACQUAINT YOU WITH THE INSTALLATION,
OPERATION, AND MAINTENANCE OF
YOUR WATER HEATER AND TO PROVIDE
IMPORTANT SAFETY INFORMATION.
INSTALLER RESPONSIBILITIES
Please read all instructions thoroughly before
installing or placing the heater into service.
This unit must be installed by licensed or
authorized installers, or technical personnel
that service water heating equipment. The
heater must be installed in accordance with all
local codes and ordinances.
These instructions are a guide for the
correct installation of the water heater. The
manufacturer will not be liable for damages
caused by failure to comply with the installation
and operating instructions outlined on the
following pages.
CAUTION
The recommended water temperature setting
for normal residential use is 120°F/49°C.
HANDLING
Before uncrating, check for shipping damage.
Report any damage to your carrier. Note damage
on bill of lading or delivery receipt and file a
claim.
FAILURE TO FOLLOW THESE INSTRUCTIONS
OR ALL APPLICABLE BUILDING CODES AND
REGULATIONS VOIDS THE WARRANTY
ON THIS WATER HEATER.
Read all instructions thoroughly before
attempting installation or operation of your
water heater. Keep these instructions for future
reference.
Local plumbing and electrical codes must
be followed in the installation of this water
heater. In the absence of a local code use the
UNIFORM PLUMBING CODE and the NFPA
Code. Local codes may supersede instructions
in this installation manual.
These instructions are a guide for the
correct installation of the water heater.
The manufacturer will not be liable for
damages caused by failure to comply with
the installation and operating instructions
outlined on the following pages.
Warranty, Registration Card and Parts List are included.
Homeowner: Please remember to return the Registration Card!
To the Consumer:
Please read these and all component
instructions and keep for future reference.
To the Installer:
Please attach these instructions
next to the water heater.
Techtanium™ Solar
Indirect Water Heater
Instruction Manual

IMPORTANT SAFETY INSTRUCTIONS
WARNING
When using electrical appliances, basic safety precautions to reduce the
risk of fire, electric shock, or injury to persons should be followed, including:
1. READ ALL INSTRUCTIONS BEFORE USING THIS WATER HEATER.
2. This water heater must be grounded. Connect only to properly
grounded outlet. See “GROUNDING INSTRUCTIONS” found on page 13.
3. Install or locate this water heater only in accordance with the provided
installation instructions.
4. Use this water heater only for its intended use as described in this
manual.
5. Do not use an extension cord set with this water heater. If no receptacle
is available adjacent to the water heater, contact a qualified electrician
to have one properly installed.
6. As with any appliance, close supervision is necessary when used by
children.
7. Do not operate this water heater if it has a damaged cord or plug, if it is
not working properly, or if it has been damaged or dropped.
8. This water heater should be serviced only by qualified service
personnel. Contact nearest authorized service facility for examination,
repair, or adjustment.
SAVE THESE INSTRUCTIONS
Page 2

Page 3
TABLE OF CONTENTS
Section I: Specifications .............................................4
Section II: General Information ....................................... 5
SectionIII:Pre-Installation...........................................8
SectionIV:Installation..............................................9
Section V: Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Section VI: Maintenance ........................................... 15
Section VII: Troubleshooting......................................... 16
SectionVIII:PartsList.............................................. 17
Section IX: Warranty ............................................... 19

Page 4
SECTION I: SPECIFICATIONS
Foam insulation standard. Pressures, all: Test pressure = 300 PSI; Working pressure = 150 PSI
Electrical rating (where applicable): 4.5KW, 240V
WARNING: Installation should be in accordance with all national and/or local codes.
CAUTION: The recommended water temperature setting for normal residential use is 120°F. DHT recommends a tempering
valve or anti-scald valve be installed and used according to the manufacturer’s directions to prevent scalding.
TT-80SCE 24´´ 64´´ 57 1⁄8´´ 57 1⁄8´´ 31 1⁄2´´ 19 1⁄4´´ 6 1⁄2´´ 5´´ n/a n/a n/a
TT-119SCE 28´´ 65´´ 57 3⁄4´´ 57 3⁄4´´ 33 3⁄4´´ 16 1⁄4´´ 8 3⁄4´´ 6 1⁄2´´ n/a n/a n/a
TT-80DC 24´´ 64´´ 57 1⁄8´´ 57 1⁄8´´ 49 1⁄2´´ 46 7⁄8´´ 36 1⁄2´´ 31 1⁄2´´ 19 1⁄4´´ 6 1⁄2´´ 5´´
TT-119DC 28´´ 65´´ 57 3⁄4´´ 57 3⁄4´´ 51 3⁄4´´ 49 1⁄8´´ 38 3⁄4´´ 33 3⁄4´´ 16 1⁄4´´ 8 3⁄4´´ 6 1⁄2´´
Model
A C
B
E
D
G
F
I
H
K
J
Figure 2: TT-80DC, TT-119DC
Figure 1: TT-80SCE, TT-119SCE
Table 1: Dimensions
COLD IN
(1" NPT)
K
A
F
I
Bottom
Sensor
Immersion
Well
Immersion Well
ANODE
E
G
H
C
B
TO SOLAR
(1" NPT)
J
FROM BOILER (1" NPT)
TO BOILER (1" NPT)
FROM SOLAR
(1" NPT)
T&P RELIEF
VALVE
HOT OUT (1" NPT) ANODE
Top Sensor
Immersion Well
D
ANODE
HOT OUT
(1" NPT)
D C
F
E
B
COLD IN
(1" NPT)
A
TO SOLAR
(1" NPT)
G
BottomSensor
Immersion Well
Electric
Heating
Assembly
FROM SOLAR
(1" NPT)
3/4 NPT Port
ANODE
H
Name: SCE (Single Coil with Electric backup) / DC (Dual Coil)

Page 5
SECTION I: SPECIFICATIONS (cont.)
NOTES:
* Based on 5 GPM flow rate.
SECTION II: GENERAL INFORMATION
SOLAR WATER HEATER FUNCTION
The solar water heater is designed with an internal coil and backup electric heating element.
In lieu of an electric heating element, some models incorporate a second internal coil for
backup heating. A heating medium is passed through the solar panels and internal coil as
long as there is an adequate temperature difference between the heating medium and stored
water in the tank. The internal coil is located as close to the bottom as possible to facilitate
the transfer of heat even at lower solar panel temperatures.
During periods of water flow through the water heater, hot water is drawn from the top of
the heater and cold water is delivered to the bottom of the tank (by a diptube or bottom
inlet). If the hot water demand should exceed the solar heat output or there is an insufficient
temperature difference between the heating medium and stored water, the heating element
thermostat will activate the electrical heating element for backup heat. When an additional
internal coil is used for backup heating, an aquastat should be used for flow control in the
backup heating loop. An aquastat immersion well is supplied on SCE models.
Solar heat output from the internal coil will vary depending on outside conditions and the
temperature of the stored water.
WATER TREATMENT/FILTRATION
In areas where poor water conditions are suspected (i.e. lime, iron, and other minerals), it
is essential that the water be tested and appropriate action taken to prevent damage to the
indirect heater and ensure the quality of the water.
TT-80SCE 75 2.76/ - 14.14/ - 0.60/- 40 0.8
TT-119SCE 110 2.76/ - 14.14/ - 0.60/- 50 1.2
TT-80DC 73 2.76/1.84 14.14/9.42 0.60/0.40 - 0.8
TT-119DC 108 2.76/1.84 14.14/9.42 0.60/0.40 - 1.2
Model
Actual Tank
Volume (gal)
Coil Volume
Solar/Boiler (gal)
Coil Surface Area
Solar/Boiler (ft
2
)
Coil Friction Loss*
Solar/Boiler (ft.w.c.)
Electric Heating
First Hour Rating (gal)
Standby Loss
Rating (°F/hr)
Table 2: Capacity & Performance

Page 6
SECTION II: GENERAL INFORMATION (cont.)
TEMPERATURE CONTROL
A solar controller (not provided) shall be used in conjunction with the solar water heater to
run all solar components in the heating system. The solar controller will be connected to
two thermistors that monitor lower and upper tank temperature. In some cases, only one
thermistor (near the bottom of the tank) will be used. The proper temperature setting for
domestic hot water use is 120°F/49°C.
The solar water heater is equipped with a backup electrical heating element and adjustable
thermostat. The thermostat is located behind the access cover on the side of the water heater.
If the solar system cannot satisfy the user demand, the electric element will energize and heat
the water until the thermostat is satisfied. An ECO (electrical cut-off) is included as part of
the temperature control and is designed to cut off power to the heating element in the event
the water in the tank reaches 180°F. The ECO is a safety feature on the water heater and
cannot be adjusted. In the event that the ECO opens, the control must be manually reset with
the stored water temperature below 180°F.
The thermostat is factory set at 120°F. See Table 6 for thermostat letter and temperature
relationships. If hotter water is required a tempering device or anti-scald device must be
installed at the domestic hot water outlet of the heater or at the point of use. Table 3 details
the approximate relationship of water temperature and time with regard to scald injury. It
is important for the user to understand the necessity of tempering or anti-scald devices when
using hotter water in domestic water heating systems.
CAUTION: Hot water in excess of 120°F can cause scalding!
DHT recommends a tempering valve or anti-scald valve be installed and used according to
the manufacturer’s directions to prevent scalding. Many state and local codes now require
installation of these devices. The tempering valve
or anti-scald valve will ensure potable water
temperatures at the desired set point with a higher
degree of accuracy.
APPROXIMATE
TEMPERATURE/TIME
RELATIONSHIPS TO
SCALDING
120°F More than 5 minutes
125°F 1 1⁄2 to 2 minutes
130°F About 30 seconds
135°F About 10 seconds
140°F Less than 5 seconds
145°F Less than 3 seconds
150°F About 1 1⁄2 seconds
155°F About 1 second
Table 3: Scald Temperature/Time Relationships

SECTION II: GENERAL INFORMATION (cont.)
ANODE RODS
The anode rod is used as a sacrificial element within the volume of the storage tank. The
purpose of the magnesium anode rod is to protect the inside of the tank against corrosion.
Anode rods should be inspected twice in the first year and at least yearly once a time interval
for inspection has been developed. Water conditions can influence the consumption rate of
the anode rods. Please see the Maintenance section of this manual for instructions on how to
change the anode rods in your Roth water heater.
CAUTION
Hydrogen gas is produced in a hot water system served by the heater that has not
been used for a long period of time (2 weeks or more). Hydrogen gas is extremely
flammable. To reduce the risk of injury under these conditions, it is recommended
that the hot water faucet be opened for several minutes at the kitchen sink before
using any electrical appliance connected to the hot water system. When hydrogen
is present, there will probably be an unusual sound such as air escaping through the
pipe as the water begins to flow. There should be no smoking or open flame near the
faucet at the time it is open.
TEMPERATURE AND PRESSURE RELIEF VALVE (T&P)
CAUTION
To reduce the risk of excessive pressures and temperatures in this water heater, install
temperature and pressure protective equipment required by local codes and no less
than a combination temperature and pressure relief valve certified by a nationally
recognized testing laboratory that maintains periodic inspection of production of listed
equipment or materials, as meeting the requirements for Relief Valves and Automatic
Gas Shutoff Devices for Hot Water Supply Systems, ANSI Z21.22. This valve must be
marked with a maximum set pressure not to exceed the marked maximum working
pressure of the water heater. Install the valve in an opening provided and marked for
this purpose in the water heater, and orient it or provide tubing so that any discharge
from the valve exits only within 6 inches above, or at any distance below, the
structural floor, and does not contact any live electrical part. The discharge opening
must not be blocked or reduced in size under any circumstances.
The T&P valve is factory installed. A discharge drain tube must be installed (responsibility
of the installer) and shall terminate plain, not threaded, 6 inches above the floor drain.
The drain tube material must be approved for temperatures of 120°F or greater and a
pressure of 150 PSI or greater.
BACKFLOW PREVENTER (CLOSED LOOP SYSTEM)
Some local municipal codes and ordinances require the use of these devices on potable
(domestic) water lines. Where backflow preventers are required, it will be necessary to install
a thermal expansion tank (designed for used with potable water) in order to prevent
pressure build up in the indirect heater and associated piping, which could cause the T&P
valve to discharge. Follow the expansion tank manufacturer’s recommendations when
selecting a tank for your hot water system.
Note: Working pressure of the water heater is 150 PSI.
Do not exceed 150 PSI.
Page 7

Page 8
SECTION III: PRE-INSTALLATION
LOCATION
CAUTION
This water heater must be located in an area where leakage of the tank, water line
connections, or the temperature and pressure relief valve will not result in damage to
the area adjacent to the water heater or to lower floors of the structure. When such
location cannot be avoided, a suitable drain pan must be installed under the water
heater. The drain pan depth must be suitable for draining and collecting water. The
drain pan can be purchased from your plumbing professional. The drain pan must
be piped to an adequate drain and all drain piping must be at least 0.75” in diameter
and pitched for proper drainage.
CAUTION
DO NOT store or use gasoline or other flammable, combustible, or corrosive vapors
and/or liquids in the vicinity of the water heater or any other appliance.
IF YOU SMELL GAS:
 •DONOTtrytolightanyappliance.
 •DONOTtouchanyelectricswitch;donotuseanytelephoneinyourbuilding.
 •Immediatelycallyourgassupplierfromatelephoneinanotherbuilding.Followyour
gas supplier’s instructions.
 •Ifyoucannotreachyourgassupplier,callthefiredepartment.
DO NOT OPERATE THE APPLIANCE UNTIL THE LEAKAGE IS CORRECTED!
CAUTION
Do not drop water heater or lay heater down on its side. Move the water heater into
position by sliding or using an appropriately sized hand truck.
The solar indirect water heater must be installed indoors. Locate the water heater as close as
practical to the solar heating system and leave sufficient clearances for servicing the heater.
The entire solar heating system should be located as close as possible to points of hot water
use for the fastest delivery of hot water. This water heater may be installed on combustible
flooring. DO NOT install this water heater on carpeting.
See Tables 4 and 5 for combustible and service clearances.
Top Sides Front Rear
0´´ 0´´ 0´´ 0´´
Top Sides (non-piping) Side (T&P Relief Valve) Front Rear
12´´ 4´´ 6´´ 16´´ 0´´
Table 4: Clearance from Combustible Materials
Table 5: Recommended Service Clearances

Page 9
SECTION IV: INSTALLATION
WATER CONNECTIONS
CAUTION
This water heater incorporates fittings that contain a nonmetallic lining. DO NOT apply
heat to these fittings when making sweat connections to the heater. Sweat tubing to
an adapter before securing adapter to any fittings on water heaters.
ALL PIPING SHOULD CONFORM TO LOCAL CODES AND ORDINANCES. It is highly
recommended that unions and shut-off valves are installed at the potable water and heat
exchanger connections to allow for isolation and/or movement during service. In addition,
all piping should be adequately insulated with an approved material to minimize heat loss.
POTABLE WATER CONNECTIONS
THE WATER HEATER MUST BE FILLED WITH WATER BEFORE CONNECTING
ELECTRIC POWER.
1) Close the main water supply valve before continuing with the installation. After the
main water supply is shut-off, relieve the water line pressure by opening a faucet. Once the
pressure has been relieved, close the faucet. The “Cold” and “Hot” potable water connections
are labeled on the water heater. Install a union and shut-off valve at both potable water
connections. All piping should be 3/4” diameter new copper or larger. A tempering valve
or anti-scald valve should be installed at the potable water outlet and used according to the
manufacturer’s specifications to prevent scalding.
2) If a backflow preventer is required in the cold water supply, a properly sized expansion
tank must be installed to control thermal expansion. Do not operate the water heater in
a closed system without installing a thermal expansion tank. Follow the expansion tank
manufacturer’s recommendations when selecting a tank for your system.
3) Following installation of the water lines, open the main water supply valve and fill the
water heater. Open several hot water faucets to relieve air from the system. After water is
flowing through the faucets and the system is void of air, close the faucets and check for
water leaks in the system.
SOLAR CONNECTIONS
CAUTION
Temperature of the primary heat source medium (from solar collector or boiler) shall
not exceed 200°F.
The outlet of the solar collector should be connected to the water heater at the “FROM
SOLAR” fitting. The fitting labeled “TO SOLAR” should be connected to the solar return
piping. It is recommended to install a union and shut-off valve at each solar connection. All
pipe and fittings between the solar system and water heater should be 3/4” diameter or larger.

Page 10
SECTION IV: INSTALLATION (cont.)
A piping diagram for a typical solar domestic water heating system based on an indirect
water heater with electric heating backup is shown in Figure 3.
cold water
hot water
solar collector array
anti-scald valve
expansion tank
ll/purge valves
air separator
circulator w/
isolation anges
solar
controller
electric
heating
element
solar indirect water heater w/
electric heating element
pressure
relief
valve
air vent w/ shut
o valve
Figure 3: Single tank system with electric backup
PIPING DIAGRAMS

Page 11
solar collector array
anti-scald
valve
expansion tank
ll/purge valves
air separator
circulator w/
isolation
anges
solar
controller
solar indirect water heater
pressure
relief
valve
conventional water heater
electric
heating
element
electric
heating
element
cold water
hot water
N.C.
N.O.N.O.
air vent w/ shut
o valve
Figure 4: Two tank system with existing heater
A typical two tank system is shown in Figure 4. The two tank system is mainly used
where a conventional water heater is already installed.
SECTION IV: INSTALLATION (cont.)

Figure 5 shows an example of a domestic solar heating system based on an indirect water
heater with two coils. The domestic water can be heated by the solar system as well as the
boiler.
Page 12
cold water
hot water
solar collector array
anti-scald valve
expansion tank
ll/purge valves
air separator
circulator w/
isolation
anges
solar
controller
solar indirect water heater w/
two coils
pressure
relief
valve
air vent w/ shut
o valve
boiler
boiler
circulator
w/ check
valve and
isolation
anges
pressure
reducing
valve
backow
preventer
air separator
purge
valve
Figure 5: Single tank system with boiler backup
SECTION IV: INSTALLATION (cont.)

ELECTRICAL CONNECTIONS
DANGER
Confirm that all electrical connections are unpowered before installing or servicing
electrical components/connections within the water heater.
WARNING
The water heater must be electrically grounded in accordance with local codes or, in
the absence of local codes, with NFPA 70.
Failure to properly wire electrical connections may result in serious physical harm.
Electrical power may be from more than one source. Make sure all power is off before
attempting any electrical work.
ELECTRIC HEATING ELEMENT (BACKUP)
THE WATER HEATER MUST BE FILLED
WITH WATER BEFORE CONNECTING
ELECTRIC POWER.
All electrical connections on the water heater
must be made with copper conductors only. A
separate branch circuit with copper conductors,
over-current protection, and means for
disconnection must be provided by qualified
service personnel. The total wattage load and
voltage requirements for the water heater are
specified on the rating label located on the front
of the heater.
The thermostat and electric heating element
are pre-wired at the factory. A junction box
is located at the top of the water heater. The
junction box cover will accommodate a 1/2” or
3/4” electrical conduit connector. Two wires
are located in the junction box (red and black)
for connection to the branch circuit. See Figure
6 for a wiring diagram.
GROUNDING INSTRUCTIONS
A green screw (ground) is located in the junction box for proper connection to ground from
the branch circuit.
SOLAR CONTROLLER AND THERMISTORS
Two locations for potable water temperature measurement have been provided. The factory
installed immersion wells are designed to accommodate insertion of a thermistor. The solar
system controller and thermistors are not supplied with this water heater.
Page 13
SECTION IV: INSTALLATION (cont.)
1
2
3
4
1
2
BK
R
BK
R
RESET
L1 L2
G
BRANCH CIRCUIT
TO ELECTRICAL
DISTRIBUTION PANEL
240 V
JUNCTION BOX
HEATING
ELEMENT
THERMOSTA T
& ECO
Figure 6: Thermostat and Heating
Element Wiring

Page 14
SECTION V: OPERATION
INITIAL START-UP
Reference the solar collector installation instructions for proper start-up of the solar collector.
Be sure that fluid flow in the solar system is established.
HEATING OPERATIONS
Condition 1: The minimum temperature difference (for heat transfer) between the potable
water at the bottom of the tank and the solar collector is sensed by the solar controller. In
addition, the tank temperature is below the maximum tank temperature setpoint (on solar
control).
Action 1: The solar controller energizes a pump to flow fluid through the solar
collector and heat exchanger. Heat is transferred to the potable water until
the temperature difference is reduced to a desired value or the maximum tank
temperature has been reached.
Condition 2: The heating element thermostat senses that the potable water temperature in
the upper area of the tank drops below the thermostat set-point.
Action 2: The heating element is energized and heats the potable water to the set-
point temperature, at which point the element is de-energized.
THERMOSTAT TEMPERATURE ADJUSTMENT
CAUTION
The temperature setting on the heating element thermostat shall not exceed 160°F.
Likewise, the solar controller potable water temperature setting shall not exceed 160°F.
Install a tempering valve or anti-scald mixing valve at the outlet of the water heater to
ensure greater control over water temperatures at the point of use.
CAUTION
Turn off all power to the water heater before adjusting the heating element thermostat.
The heating element thermostat is factory adjusted to 120°F (“HOT” indicator setting). If
thermostat adjustment is necessary, disconnect all power to the water heater and solar
collector. Remove the access cover on the side of the water heater and remove the foam dam
insert to expose the thermostat and heating element. The temperature knob can be adjusted
with a screwdriver to a minimum temperature of 110°F and a maximum temperature of
160°F (labeled “VERY HOT”). See Table 6 for a listing of indicator setting and temperature
relationships.
Table 6: Thermostat Temperature Settings
Indicator Setting Temperature (°F)
• (min) 110
HOT 120
A 130
B 140
C 150
VERY HOT 160

Page 15
CAUTION
Hot water in excess of 120°F can cause scalding! The temperature at which injury
occurs varies with the person’s age and the time of exposure. The slower response
time of disabled persons increases the hazards to them. NEVER allow small children to
use a hot water tap. NEVER leave a child or disabled person unattended in a bathtub
or shower.
Replace the foam dam insert and access cover after adjusting/inspecting the thermostat.
If the thermostat temperature setting (or anti-scald mixing valve) was adjusted, check
the water temperature at a faucet. Flow enough water through the faucet to ensure that
the faucet temperature reflects the tank temperature. Adjust the thermostat or mixing
valve setting as necessary. Adjusting the thermostat setting (lower or higher) will not
immediately affect the water temperature at the faucet. Flow a sufficient amount of water
or allow a heat-up cycle to complete before making further adjustments.
SECTION VI: MAINTENANCE
WATER PIPING
On an annual basis, all piping should be checked for leakage at joints, shut-off valves, and
unions.
T&P RELIEF VALVE
On an annual basis, the temperature and pressure relief valve should be checked for proper
operation. First, attach a drain line to the valve to direct the water discharge to an open
drain. This is very important because the temperature of the discharge could be very hot.
Second, lift the lever at the end of the valve several times. The valve should operate freely
and return to its original position properly. If water does not flow out of the valve, remove
and inspect for corrosion or obstructions. Replace with a new valve if necessary. Do not
repair the faulty valve as this may cause improper operation.
ANODE RODS
Anode rods should be inspected twice in the first year and at least yearly once a time interval
for inspection has been developed. It is recommended to check the rod(s) six months after
the heater is installed. If the anode rod had reduced in size by two-thirds of its original
diameter of 3/4” or shows signs of pitting, it is time for replacement. Take the following
steps when changing the anode rod(s):
1. Shut off water supply.
2. Open any faucet to relieve tank pressure.
3. Remove caps on water heater top; push insulation aside.
4. Use a 1 1/16” six-sided socket wrench and a breaker bar. Snap hard to break the anode
rod seal.
5. Remove rod(s) and replace with new rod(s).
6. Turn water supply back on and leave faucet open until air is out of line.
7. Turn faucet off and check that new rod(s) doesn’t leak.
8. Snap caps back into place.
SECTION V: OPERATION (cont.)

Page 16
SECTION VII: TROUBLESHOOTING
SECTION VI: MAINTENANCE (cont.)
FLUSH THE TANK
The solar indirect water heater is glass lined. Elements in the water such as lime, iron and
other minerals may accumulate in the heater. It is recommended that the tank be drained
and flushed thoroughly once a year to prevent buildup in the tank.
SOLAR CONTROLLER AND COLLECTOR PANELS
The solar controller and collector panel manufacturer may have a recommended
maintenance procedure. Refer to the instruction manual that was received with the solar
equipment.
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Page 17
SECTION VIII: PARTS LIST
3
4
5
66
7
5
8
9
2
10
2
11
9
7
9
2
7
9
12 13 14 15 16 17 18
2
7
1
19
Table 7: TT-80SCE & TT-119SCE Parts (Single Coil with Electric backup)
Part Description
1 Sensor Immersion Well (solar) 10 T&P Relief Valve
2 Leak Detector 11 Drain Valve
3 J-Box Cover 12 Access Cover
4 J-Box Cover (w/ conduit hole) 13 Foam Dam Cover
5 Anode Rod 14 Thermostat Cover
6 Cap ("ANODE") 15 Heating Element
7 Finish Ring 16 Thermostat Mounting Bracket
8 Cap (blank) 17 Thermostat
9 Pipe Nipple (plastic-lined) 18 Heating Element Gasket
19 Plug

Page 18
SECTION VIII: PARTS LIST (cont.)
12
3
45
4
3
6
7
2
8
2
9
7
5
57
12
7
5
5
7
10 25
7
Part Description
1 Sensor Immersion Well (solar)
2 Leak Detector
3 Anode Rod
4 Cap ("ANODE")
5 Finish Ring
6 Cap (blank)
7 Pipe Nipple (plastic-lined)
8 T&P Relief Valve
9 Drain Valve
10 Immersion Well (for aquastat)
Table 8: TT-80DC & TT-119DC Parts (Dual Coil)

Page 19
SECTION IX: WARRANTY
LIMITED WARRANTY FOR SOLAR WATER HEATER
Diversified Heat Transfer Inc.
1710 Flushing Ave, Ridgewood, NY 11385
Phone: [phone] • Fax: [phone]
What Does This Limited Warranty Cover?
This limited warranty applies only to the original consumer purchaser.
For water heaters installed in single family dwellings for residential use:
General Defects and Malfunctions: This warranty covers defections and malfunctions in your
new water heater for a period of one year from the original installation date. We will repair or
replace, at our option, any defective or malfunctioning component of the water heater. This
limited warranty will terminate if you sell or otherwise transfer the water heater, or the water
heater is installed at a location different from its original installation location.
Tank and Heat Exchanger (indirect coil only): We also warrant that the tank and heat exchanger
will not leak due to defective materials or workmanship for six years from the date of original
installation or from date of manufacture in the event the Limited Warranty Registration Card
was not completed and returned to manufacturer. If the tank and heat exchanger is leaking
and we have verified that the leak is due to a defect in materials and workmanship, we will
replace the tank with a tank that is the nearest Roth model available at the time of replacement.
If a replacement tank is provided, it will remain warranted under this section as if it were the
original tank. For example, if we send you a replacement tank under this limited warranty two
years after the original installation date, then the replacement tank will remain warranted for
the remaining four years after the original installation date.
For all other water heaters, such as commercial use:
General Defects and Malfunctions: This warranty covers defections and malfunctions in your
new water heater for a period of one year from the original installation date. We will repair or
replace, at our option, any defective or malfunctioning component of the water heater. This
warranty lasts for one year. Coverage terminates if you sell or otherwise transfer the water
heater, or the water heater is installed in a different location.
Tank and Heat Exchanger (indirect coil only): We also warrant that the tank and heat exchanger
will not leak due to defective materials or workmanship for three years from the date of original
installation or from date of manufacture in the event the Limited Warranty Registration Card
was not completed and returned to manufacturer. If the tank and heat exchanger is leaking
and we have verified that the leak is due to a defect in materials and workmanship, we will
replace the tank with a tank that is the nearest Roth model available at the time of replacement.
If a replacement tank is provided, it will remain warranted under this section as if it were the
original tank. For example, if we send you a replacement tank under this limited warranty two
years after the original installation date, then the replacement tank will remain warranted for
the remaining one year after the original installation date.

How Do You Get Service Under the Limited Warranty?
In order to be eligible for service under this warranty you MUST return the warranty registration
card attached below within 30 days of purchasing the water heater. You may also fill the register
form and send it by fax to the Technical department at the following number: 718-386-7809.
You must have a copy of the original sales receipt at the time you request service.
To get service under this limited warranty you should contact either the dealer or installer.
If dealer or installer is unknown you can call us Monday through Friday between the hours of
8 o’clock a.m. to 4:30 o’clock p.m. Eastern Time at the following number: 1-718-386-6666/
800-221-1522.
You can also write us at the following address:
Diversified Heat Transfer Inc.
Warranty Support Group
1710 Flushing Avenue
Ridgewood, NY 11385
We will respond not later than ten days after we have received your request for service.
What Does This Limited Warranty NOT Cover?
This limited warranty does not cover water heaters that are or were:
a. Incorrectly installed, especially where the installation violates state or local plumbing,
housing or building codes.
b. Operated at inappropriate settings, excessive pressures or temperatures.
c. Exposed to adverse local conditions and specifically sediment or lime precipitation in
d. the tank or corrosive elements in the atmosphere or unacceptable water quality.
e. Installed outside the United States or Canada.
Accidentally damaged
Also, we will not cover the following charges, costs and losses:
a. Any freight or delivery charges.
b. Any removal or installation charges.
c. Charges to return the water heater or part to the manufacturer.
d. Water damage, loss or damage to property, inconvenience or loss of use.
Page 20