STIEBEL ELTRON SOL 29 Premium S User manual

OPERATION AND INSTALLATION
Solar Thermal Collector
» SOL 29 Premium S
» SOL 29 Premium W

2| SOL 29 Premium www.stiebel-eltron-usa.com
OPERATION
General Instructions
OPERATION
1. General Instructions
This manual includes important information regarding the safe and
efficient handling of the water heater. Keep this manual with the
water heater at all times.
Work must only be carried out by a licensed installer who has read
and understands these instructions. All federal, state and local codes
must be followed. Failure to do so may result in equipment failure,
serious injury, or death.
While working on the water heater, disconnect the power supply.
Illustrations in these instructions are designed to aid a general un-
derstanding and may deviate from the actual water heater version.
No claims can be derived from such installations.
Limited liability:
We have collated all details and information in this manual in due
consideration of applicable standards and regulations, the state of
the art and our long-term know-how and experience.
Losses due to the following are excluded from our liability:
- Non-observance of these instructions
- Incorrect use
- Installation of water heater by unqualified personnel
- Unauthorized modifications
- Use of unauthorized spare parts
For more information on liability, see the warranty section at the
back of this manual.
NOTE:
Read these instructions carefully before using the appli-
ance and retain them for future reference.
Pass on the instructions to a new user if required.
1.1 Safety instructions
1.1.1 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
Fire
!
OPERATION
1. General Instructions ___________________________________________ 2
1.1 Safety instructions__________________________________________________ 2
1.2 Other symbols in this documentation __________________________ 3
2. Safety____________________________________________________________ 3
2.1 Intended use_________________________________________________________ 3
2.2 General safety _______________________________________________________ 3
2.3 Mandatory equipment _____________________________________________ 3
2.4 Emergency shut-down_____________________________________________ 3
2.5 Licenses/certificates________________________________________________ 3
3. Register your product _________________________________________ 4
4. General product information _________________________________ 4
INSTALLATION
5. Safety____________________________________________________________ 4
5.1 Regulations, codes, and standards _____________________________ 4
6. Installation______________________________________________________ 4
6.1 Planning and installation _________________________________________ 4
6.2 Determining array size ____________________________________________ 5
6.3 Determining mounting hardware quantity____________________ 5
6.4 Mounting hardware spacing _____________________________________ 5
6.5 Mounting hardware installation_________________________________ 6
6.6 Collector frame installation_______________________________________ 6
6.7 Collector installation _______________________________________________ 7
6.8 Collector connection _______________________________________________ 8
6.9 Temperature sensor installation_________________________________ 9
6.10 Pipework installation _____________________________________________10
6.11 Thermal insulation ________________________________________________10
7. Commissioning ________________________________________________10
7.1 Pressure and leak test ____________________________________________10
7.2 Expansion tank pre-charge pressure __________________________10
7.3 Charging & venting________________________________________________10
7.4 More information__________________________________________________11
8. Maintenance & care___________________________________________11
9. Technical data _________________________________________________12
9.1 Dimensions__________________________________________________________12
9.2 Data table ___________________________________________________________12
9.3 Propylene glycol specifications _________________________________13
10. Commissioning guide _________________________________________ 14
11. Warranty _______________________________________________________15

OPERATION
Safety
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium | 3
1.2 Other symbols in this documentation
NOTE:
Notes are bordered by horizontal lines above and below
the text. General information is identified by the adjacent
symbol.
 Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmental
pollution)
Appliance disposal
Never cover the appliance
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
2. Safety
Observe the following safety information and regulations.
Operate the appliance only when fully installed and with all safety
equipment fitted.
2.1 Intended use
This device is intended to produce hot water for domestic and hea-
ting use by collecting energy radiated from the sun.
Any other use beyond that described shall be deemed inappropriate.
Observation of these instructions and of instructions for any acces-
sories used is also part of the correct use of this appliance.
2.2 General safety
!WARNING:
A solar collector generates heat from sunlight. This
leads to the collectors and their connectors getting
very hot, even when they are not filled. Cover the col-
lectors with opaque material until the installation has
been completed.
!WARNING:
Never install any valves or shut-off devices in the pip-
ing between the collectors and the safety valve. The
safety valve is activated at 87 psi.
Never set the solar loop pressure greater than the dhw
water supply pressure. If the potable water pressure is
too low, a booster pump may be needed to assure that
it exceeds the required solar loop pressure.
WARNING: Scalding
Setting the maximum tank temperature higher than
140°F at the control unit is permissible only with a
thermostatically-controlled DHW mixing valve. Other-
wise there can be a risk of scalding at the tapping
point.
2.3 Mandatory equipment
Check valve
Check valves must be installed on the supply and return piping to
the collectors to prevent heat loss via single-pipe thermosiphoning.
Drain valve
A drain valve must be installed at the lowest point of the solar ther-
mal system to aid in draining for maintenance.
Expansion tank
A diaphragm-type expansion tank must be installed to accept expan-
ding fluid in the solar loop. The expansion tank should be designed
for an operating pressure of 87 psi and are resistant to deterioration
from propylene glycol mixtures.
The air-side inlet pressure should be set equak to the system start-
up (cold) pressure; check it when the system has not been filled or
when the wet side of the expansion tank is open to the atmosphere.
Solar heating fluid
Use only a mixture of food-grade propylene glycol and de-ionized
water in the solar loop. The ratio of glycol to water should provide
sufficient freeze protection below expected cold water temperatures
in the climate of the installation location.
Besides freezing, glycol must be used as a corrosion inhibitor in the
rest of the solar loop piping. See the specifications for the solar fluid
in section 9.3 on page 13.
2.4 Emergency shut-down
Except for repair and/or emergency, the control unit and the pump
must remain powered and activated in order to avoid overheating
the collectors. Prior to shutting down the system for repairs, cover
the solar collectors or work at night.
If emergency shut-down is needed, unplug the control unit and call
for service.
2.5 Licenses/certificates
- SRCC Standard 100-2006-09 (OG-100): 10002015
!

INSTALLATION
Register your product
4| SOL 29 Premium www.stiebel-eltron-usa.com
3. Register your product
You must register this product within 90 days of
purchase on our web site in order to activate the
standard warranty or to be eligible for any extended
warranty. Go to our web site at
www.stiebel-eltron-usa.com and click on register your
product.
Before beginning the registration process, we suggest that you
gather the necessary information which will be as follows:
Model (Example: SOL 29 Premium S):
Serial number (listed after “Nr.”):
Place of Purchase:
Purchase date:
First & last name:
Email address:
Physical address:
Phone number:
If you have any questions concerning the registration process or
warranty options, please contact Stiebel Eltron USA directly at
(800)-582-8423.
4. General product information
The SOL 29 Premium S & SOL 29 Premium W collectors are solar
thermal collectors designed for closed-loop operation. The absorber
plate is a four-port serpentine style designed for a single array with
up to 10 collectors connected together.
The collector converts sunlight into heat. Light penetrates the glass
cover, which is pre-stressed, highly transparent single pane safety
glass. As the light strikes the absorber plate, it is converted to heat.
The highly selective coating of the absorber and the thermal insula-
tion on the back of the absorber keep heat loss to the environment
to a minimum.
The thermal energy produced by the collector is transported by the
heat transfer medium (solar loop fluid), via a circulating pump, to
the storage tank(s).
The inside of the collector can fog up under certain operating condi-
tions (e.g., large tank with low temperature compared to the outdoor
temperature and/or high relative humidity).
INSTALLATION
5. Safety
The installation of solar thermal collectors typically involves installa-
tion on a roof, or otherwise elevated structure. Refer to all relevant
safety codes to ensure that installation can be completed without
injury.
After installation and commissioning, the collectors will be filled
with fluid. During the day, the fluid will become hot due to solar
radiation. Venting the collectors, or performing other working tasks
on the collectors while it is hot may cause you to come into cont-
act with hot solar fluid, which is a scalding risk. Always cover the
collectors with an opaque material if they are filled with fluid and
being worked on.
WARNING: Risk of scalding
To prevent the solar fluid from boiling in the collectors,
the collectrors should be covered with an opaque mate-
rial while working on the system.
!Material losses:
To protect the system against frost and corrosion, fill the
solar system exclusively with the recommended propylene
glycol mixture.
5.1 Regulations, codes, and standards
NOTE:
Observe all federal, state, and local codes when per-
forming electrical, plumbing, or roof work during instal-
lation.
6. Installation
6.1 Planning and installation
!Material losses:
Solar collectors, mounting equipment, and solar heating
fluid will add weight onto a roof. Have a licensed contractor
inspect the roof structure to ensure that the installation
location has sufficient integrity to hold all necessary com-
ponents, with expected snow and winds loads included.
The planned site for the collectors should have maximum sun expo-
sure for the most amount of time as possible. The location should
avoid shading from trees or other objects.
Ground-mount installations have a similar installation procedure to
roof installations, other than the method of securing the array to the
ground. These instructions are for a roof installation, but a ground-
mount installation is very similar. Contact Stiebel Eltron customer
support for more information about a ground-mount installation.

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium| 5
6.1.1 Mounting location
The collectors must be installed in a location such that they are not
shaded for 6 hours per day on average over the course of a year.
Evaluating the site for optimal sun exposure is recommended.
6.2 Determining array size
Once the number of collectors in the array is known, you need to
determine if the collectors should be connected into one or more
sub-arrays. If there are more than 10 collectors in the array, at least
2 sub-arrays are needed since the maximum for one array is 10.
Generally it is a good idea to have an equal number of collectors
in each sub-array along with a reverse-return pipe configuration
to ensure adequate and even flow through each sub-array. If it is
not possible to make the arrays even, then balancing valves must
be installed on the supply to each sub-array to ensure the proper
flow rates.
6.3 Determining mounting hardware quantity
To determine the number of mounting hardware assemblies in each
sub-array, add 1 to the number of collectors. For example: in a
sub-array with 2 collectors, use 3 mounting hardware assemblies
for proper installation.
6.4 Mounting hardware spacing
6.4.1 Tilt mount racking
Finding the on center distance between mounting points
Consult the table below for the rafters that will need to be secured
to. This is a minimum specification. It may be possible or necessary
to add more mounting racks per array if needed to spread out the
roof load.
On-center rafter-mount spacing
# of collectors SOL 29 Premium S SOL 29 Premium W
10’, 4’ 0, 5’-4”
2 0’, 4’, 8’ 0, 6’-8”, 8’, 13’-4”
3 0’, 4’, 8’, 12’ 0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’”
40’, 4’, 8’, 12’, 16’ 0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”
50’, 4’, 8’, 12’, 16’, 20’ 0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”
60’, 4’, 8’, 12’, 16’, 20’, 24’ 0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”, 34’-
8”, 41’-4”
70’, 4’, 8’, 12’, 16’, 20’, 24’, 28’ 0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”, 34’-
8”, 41’-4”, 42’-8”, 48’
80’, 4’, 8’, 12’, 16’, 20’, 24’, 28’,
33’-4”
0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”, 34’-
8”, 41’-4”, 42’-8”, 48’, 49’-4”,
54’-8”
90’, 4’, 8’, 12’, 16’, 20’, 24’, 28’,
33’-4”, 37’-4”
0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”, 34’-
8”, 41’-4”, 42’-8”, 48’, 49’-4”,
54’-8”, 56’, 61’-4”
10 0’, 4’, 8’, 12’, 16’, 20’, 24’, 28’,
33’-4”, 37’-4”, 41’-4”
0, 6’-8”, 8’, 13’-4”, 14’-8”, 20’,
21’-4”, 26’-8”, 28’, 33’-4”, 34’-
8”, 41’-4”, 42’-8”, 48’, 49’-4”,
54’-8”, 56’, 61’-4”, 62’-8”, 68’
Finding the distance between front and back mount points
For the distance between the front and back mounting points on the
20° and 35-50° mounting racks use the table below.
Front-back mounting point distance
Mounting type SOL 29 Premium S SOL 29 Premium W
20° tilt rack 70⅞” / 1800 mm 1020 mm
35-50° tilt rack 63¾” / 1620 mm 1020 mm
6.4.2 Flush mount racking
For the distance between the front and back mounting points on the
flush mount racks use the table below.
Front-back mounting point distance
Mounting type SOL 29 Premium S SOL 29 Premium W
Flush mount 77⅝” / 1971 mm 449 /16” / 1132 mm

INSTALLATION
Installation
6| SOL 29 Premium www.stiebel-eltron-usa.com
6.5 Mounting hardware installation
NOTE:
The installation surface should have as little height vari-
ation as possible to ensure the proper installation of the
collectors. A surface height variation larger than ¼be-
tween each mounting point is not permitted. Stress dam-
age to installed components caused by inattention to
surface height variation is cause for a voided warranty.
!Material losses:
Penetrating a roof with mounting hardware leaves it suc-
septible to permanent leaks if not installed properly. In-
stallers must be properly trained and certified for rooftop
work.
Once the number of mounting points and their distances are deter-
mined, mount the flashing kit to the roof at the appropriate spacing.
Consult the installation instructions for your particular mounting kit
for more detailed mounting and fastening instructions.
6.5.1 Installation of flashing and mounting hardware
Mount the flashing or mounting hardware on the roof so that the
bolts sticking up from the roof are spaced as described in section
6.4.1 on page 5.
Uproof
2
1
1 Mounting point spacing between rafters
2 Front and back mounting spacing
Repeat the mounting process for all flashing kits in the array. Pay
attention to vertical variation in the roof surface. A vertical variation
over ¼(6mm) between the mounting points will result in improper
installation and possibly damage the collectors.
6.5.2 Installation of tilt mount racking
For a tilt mount system, consult the installation manual for the tilt
mount racking to pre-assemble the racking kits. Once assembled,
fasten the tilt mount racking to the flashing hardware.
Fasten the racking securely to the mounting bolts. Secure racking is
critical to a safe installation of the solar thermal array.
6.5.3 Installation of flush mount racking
This manual shows an extended installation procedure for this col-
lector with tilt-mount racking. Other than the elevated nature of the
install with tilt mount racking, the installation process is identical
for flush mount racks. For a flush mount rack install, observe the
spacing requirements outlined in section 6.4.2 on page 5, and
read the dedicated installation manual for flush mount racking.
6.6 Collector frame installation
1
1 ⅜ carriage bolts
Insert carriage bolts into the slot on the underside of the collector
frame.

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium | 7
2
2 Fastening nut
Secure the collector frame by fastening a nut to the carriage bolt.
3
3 Splice connector
If joining two frames together for a larger sub-array of collectors,
slide the splice connector into the groove of the first frame. Slide
the next frame onto the splice connector.
4
4 Sheet metal screws
6.7 Collector installation
NOTE:
The collector has a sensor well near one of the four con-
nection points. This sensor well must be oriented so that
a sensor can measure the temperature of the solar fluid
as it exits the array. Do not orient the collector so that
the sensor well is located at the bottom of the collector.
For more information see section 6.9 on page 9.
!Material losses:
While carrying out work on the installation site, the col-
lectors are susceptible to damage from heavy equipment
or large objects.
To protect the collectors, do not remove the collector insu-
lation until the mounting hardware is completely installed
and ready for collector insulation.
Remove the protective insulation from the collector.

INSTALLATION
Installation
8| SOL 29 Premium www.stiebel-eltron-usa.com
1
1 M8 x 20mm bolt
Place the collector into the collector frames and fasten the bolt th-
rough the collector frame into the collector. There are four fastening
points on each collector that must be secured. Two bolts secure into
the top of the collector, and two secure into the bottom.
6.8 Collector connection
6.8.1 Connection between collectors
1
1 Inter-panel connector
Push the inter-panel connectors completely into the collector
connection. Do this for both connector ports on the side where the
next collector will be installed.
Sit the next collector into the frames and slide the inter-panel
connectors into the connections of the next collector.
Secure each collector with the M8 x 20mm bolts as each one is in-
stalled. Repeat the process with any additional collectors.
6.8.2 Connection at end of array
Cold inlet
1
2
1 Vent plug connector
2 1 male connector
On the connection side where the cold fluid will enter the collector
array, install a vent plug connector in the top collector connection
and a threaded connector in the bottom collector connection.

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium | 9
3
3 Collector connection clip
Secure all external connectors with the collector connection clip.
!Material losses:
All external connectors must be secured with a collector
connection clip. Failure to do so will cause rapid depres-
surization of the solar loop during the charging procedure
and require repair and reconnection of the connectors.
Hot outlet
4
5
4 1 male connector
5 Plug connector
On the connection side where the hot fluid exits the collector array,
install a threaded connector in the top collector connection and a
plug connector in the bottom collector connection.
WARNING: Burns
Once the collectors are installed, they will begin to heat
up even during cloudy days. Covering the collectors with
an opaque material will make working around and with
the collectors easier during the installation.
6.9 Temperature sensor installation
Install a temperature sensor into the sensor well of the collector
where the fluid exits the array and returns to the system heat exch-
anger. Secure the temperature sensor so that it will not become
dislodged from the sensor well accidentally.
2
1
1 Temperature sensor
2 Sensor well

INSTALLATION
Commissioning
10 | SOL 29 Premium www.stiebel-eltron-usa.com
6.10 Pipework installation
Use copper or stainless steel pipes or corrugated stainless steel
hoses for the supply and return lines. Pipe diameter is dependent on
the length of the run and expected flow rates. Recommended pipe
diameter for systems of up to eight collectors is ¾˝. If the pipe run
is longer than 60 feet (18 m), a larger pipe diameter may be needed.
Flashing is recommended for pipe run penetrations into the roof. On
flat roofs and roofs with shallow pitches, passing the pipes through
an external wall is recommended to avoid water leaks. Pipe hangers
must provide correct support and angle and must meet building
codes. Hangers must not compress insulation and should allow for
thermal contraction and expansion of the pipework. Installers must
comply with all local, state and national codes.
We recommend trimming pipes with pipe cutters to avoid creating
metal filings. Electrically ground the pipework in accordance with
electrical codes. Connect all pipework to the building’s ground over
the shortest possible distance.
All piping in the solar thermal loop must be properly supported
for the expected loads of the system. The piping supports must not
compress the pipe insulation.
The piping is to be run in such a way that the performance of any
fire rated assembly is not reduced.
6.10.1 Soldered pipe
Soldered pipe must be hard-soldered using 95/5 lead-free solder.
6.10.2 Alternative piping
Piping made with locking ring fittings, press fittings, and corrugated
hoses must be sealed using suitable sealants. Seals must be resistant
to propylene glycol and temperatures up to 356°F (180°C).
6.11 Thermal insulation
All exterior piping also requires UV and moisture protection. Insu-
lation must be resistant to temperatures up to 356°F (180°C).
A rigid aluminum sheath is recommended as protection for the
mineral wool. The EPDM hose can be finished with UV-resistant
paint. Where required, protect the thermal insulation against birds
or rodents. Insulate all lines of the solar loop. Apply the thermal
insulation after pressure testing and checking the system for leaks.
Extremely cold climates that experience nighttime winter temperatu-
res below -30°F (-34.4°C) may need thicker pipe insulation to prevent
pipe freeze-ups or slushing of the antifreeze mixture.
Minimum Insulation Thickness
Diameter of Pipe Minimum thickness of insulation layer
Less than ¾˝ ¾˝
¾˝ to 1 ¼˝ 1˝
1 ¼˝ to 4˝ Identical to pipe diameter
Greater than 4˝ 4˝
7. Commissioning
7.1 Pressure and leak test
After the pipe work has been installed and the collectors have been
connected it will be necessary to pressure-test the system to detect
leaks before filling the solar loop with heat transfer fluid. Propylene
glycol solutions can leak from much smaller gaps than can water; so
such testing is critical to assuring a successful installation. Recom-
mended test pressure is 80 psi. Thermal pipe insulation should be
installed only after the leak test has been successfully completed.
It is recommended that compressed air be used to test the system
for leaks, as it is very easy to make repairs and it will prevent loss of
solar medium, spills, property damage, and messy clean-up prob-
lems. Air is also capable of revealing very small leaks that water may
not reveal, through which propylene glycol will often leak. Leaks will
be evident from the sound of escaping air, observation of bubbles
emanating from fittings and other leak-prone components that are
coated with soapy water, and watching the pressure gauge over
time. Bear in mind that the pressure gauge will vary some based
on temperature of the air, so one must try to read the pressure
at nights when the system cools down to ambient temperature or
when covered.
7.2 Expansion tank pre-charge pressure
While the leak testing is being performed, the installer should set
the expansion tank’s pre-charge pressure. Make sure that the “wet”
side of the expansion tank (pipe connection) is vented to atmosphere.
Using a compressor, pre-charge the tank with air (or use pressurized
nitrogen) to a final pressure of 5 psi (350 mbar) less than the target
system pressure. For example, if the final target system (solar loop)
pressure is to be 50 psig (3.45 bar), fill the expansion tank to 45 psig
(3.1 bar), which is the recommended default value. When complete,
cap the Schrader valve fitting and reattach the tank to the pump
station. Make sure the expansion tank always faces up (the Schrader
valve must bepointed down).
7.3 Charging & venting
!WARNING:
Freeze tolerance limits are based upon an assumed set
of environmental conditions. This manual assumes prod-
uct installation in North America and the reasonable
range of weather conditions encountered there. Extend-
ed periods of cold weather, including ambient air tem-
peratures above the specified limit, may cause freezing
in exposed parts of the system. It is the owner’s respon-
sibility to protect the system in accordance with Stiebel
Eltron’s instructions if the air temperature is anticipated
to approach the specified freeze tolerance limit.
The solar heating system must be filled exclusively with the pre-
mixed propylene glycol heat transfer medium. Stiebel Eltron glycol
containers have been premixed and require no further treatment.
Never mix water with the heat transfer fluid, otherwise the essential
characteristics and corrosion protection can no longer be guaran-
teed.

INSTALLATION
Maintenance & care
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium | 11
The system must not be topped off with water. Consult the manual
or technical data sheet of the glycol mixture before using.
7.3.1 Freeze limit
Glycol provided by Stiebel Eltron provides freeze protection to -30°F
(-34°C). Weather conditions beyond this point may damage the sys-
tem.
7.4 More information
For more detailed instructions on how to fill, flush & charge the solar
loop, consult the pump station manual.
8. Maintenance & care
Specialists should carry out an annual inspection of the solar he-
ating system to ensure proper functioning of the system and its
components, including the control unit, safety equipment, and tank.
System components (fittings, thermal insulation, mounting hard-
ware, fasteners, etc.) exposed to the weather must also be checked
periodically for their condition. Look for signs of abrasion, wear,
corrosion, contamination, or damage. Check the pH value (> 7) and
frost protection level (< -20°F / -29°C) of the heat transfer medium
annually.

INSTALLATION
Technical data
12 | SOL 29 Premium www.stiebel-eltron-usa.com
9. Technical data
9.1 Dimensions
SOL 29 Premium S
A
BC
SOL 29 Premium W
A
B
C
9.2 Data table
SOL 29 Premium S SOL 29 Premium W
Item Number 290016 290017
Type Standard / Vertical Wide / Horizontal
Height (A) 82 / 2083 mm 49 / 1245 mm
Width (B) 49 / 1245 mm 82 / 2083 mm
Depth (C) 3¾˝ / 95 mm
Weight 84 lbs / 38.1 kg
Housing material deep-drawn aluminum tray
Glass cover Tempered solar safety glass
Glass thickness 1/8˝/ 3 mm
Glass transmittance >89%
Thermal insulation 2˝ / 50.8 mm mineral wool
Collector connection 1˝ BSPP thread (ships with ¾˝ adapters)
Max. idle temperature 345°F / 174°C
Min. operating pressure 145 psi / 10 bar
Test medium 50/50 propylene glycol/water mixture
Fluid capacity 0.4 gal / 1.5 l
Angle of inclination 15°-90°
Total area 27.66 ft² / 2.57m²
Aperture area 24.33 ft² / 2.26m²
Absorber area 24.65 ft² / 2.29m²
Absorber material selectively coated aluminum
Absorption level α 95%
Emission level ε 5%
SRCC OG-100 High Radiation C
Rating
30,600 Btu/panel/day /
8.97 kWh/panel/day
SRCC OG-100 Medium Radiation
D Rating
12,100 Btu/panel/day
3.55 kWh/panel/day

INSTALLATION
Technical data
ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium | 13
9.3 Propylene glycol specifications
This solar thermal system should be filled only with propylene glycol
approved by Stiebel Eltron.
DOWFROST HD
Item Number 074300
Contents of container
Volume of Mixture 5 gal / 18.9 l
Weight % Propylene Glycol 50
Volume % Propylene Glycol 50
Mixture color Bright Yellow
Mixture properties
Freezing Point -28.3°F / -33.5°C
Boiling Point @ 1 bar 222°F / 105.6°C
Freeze protection temperature -60°F / -51°C
Burst protection temperature -100°F / -73°C
DOWFROST fluid properties
Weight % Propylene Glycol 94
Weight % performance additives 6
Specific gravity (60 °F / 15 °C) 1.053 - 1.062
pH of Solution 9.5 - 10.5
Reserve alkalinity 15.0 ml
Vapor pressure over operating range 2.2 mmHg
Flash point 219°F / 104°C
Auto-ignition temperature 700°F / 371°C
Collector yield >525 kWh / (m²) per year
Dispose of in accordance with all applicable local, state and federal regulations.
Empty containers should be taken to an approved waste handling site for recycling
or disposal.
In event of accidental release, wipe up with absorbent material. Wear eye and skin
protection when handling.
In case of skin contact, wash off with plenty of water.
In case of eye contact, contact a physician. If inhaled or swallowed, contact a phy-
sician.
For more safety information, contact Stiebel Eltron for more information.

INSTALLATION
Commissioning guide
14 | SOL 29 Premium www.stiebel-eltron-usa.com
10. Commissioning guide
The installer should fill out this sheet at the end of the installation,
and leave it at the installation site.
Site:
System operator:
Installation site:
Collectors:
Collectors (number / type):
Collector surface area:
System specifications:
System height:
Pipe run length:
Ventilation:
Solar fluid (type / concentration):
Max. flow rate:
Pump station:
Pump setting (low/med high):
System pressure (cold):
System pressure (hot):
Expansion tank:
Checklist:
Mark for condition (checked, closed, open, etc.)
Pressure relief valve:
Check valves:
Ball valves:
Serial numbers:
Pump station:
Controller:
Software version:
Installation company:
Signature: Date:

ENGLISH
www.stiebel-eltron-usa.com SOL 29 Premium| 15
GARANTIE | UMWELT UND RECYCLING
Subject to the terms and conditions set forth in this limited
warranty, Stiebel Eltron, Inc. (the “Manufacturer”) hereby
warrants to the original purchaser (the “Owner”) that
each Solar Thermal Collector (the “Collector”) shall not
(i) leak due to defects in the Manufacturer’s materials or
workmanship for a period of ten (10) years from the date
of purchase. As Owner’s sole and exclusive remedy for
breach of the above warranty, Manufacturer shall, at the
Manufacturer’s discretion, send replacement parts for
local repair; retrieve the unit for factory repair, or replace
the defective Collector with a replacement unit with
comparable operating features. Manufacturer’s maximum
liability under all circumstances shall be limited to the
Owner’s purchase price for the Collector.
This limited warranty shall be the exclusive warranty
made by the Manufacturer and is made in lieu of all other
warranties, express or implied, whether written or oral,
including, but not limited to warranties of merchantability
and fitness for a particular purpose. Manufacturer shall
not be liable for incidental, consequential or contingent
damages or expenses arising directly or indirectly from
any defect in the Heater or the use of the Collector.
Manufacturer shall not be liable for any water damage
or other damage to property of Owner arising, directly or
indirectly, from any defect in the Collector or the use of
the Collector. Manufacturer alone is authorized to make
all warranties on Manufacturer’s behalf and no statement,
warranty or guarantee made by any other party shall be
binding on Manufacturer.
This warranty does not apply:
1. To conditions resulting from a failed component or part
that is not part of the solar collector or absorber plate;
2. to freeze damage;
3. to conditions resulting from misuse, abuse, neglect,
accident, or alteration;
4. to minor discoloration of the collector frame wall or
absorber plate;
5. to glass breakage;
6. to conditions resulting from the introduction of
harmful chemicals, caustic fluids, or liquids deleterious
to copper tubing, including improperly applied or
maintained heat transfer fluids;
7. to propylene glycol ph levels above 10 or below 8;
8. to periods of stagnation in excess of 60 days;
9. to excessive pressure;
10. to clouding or similar occurrence resulting from the
normal intrusion of moisture into;
11. to conditions resulting from floods, earthquakes,
winds, fire, lightning, or circumstances beyond the
manufacturer‘s control;
12. to installation methods which do not conform to
relevant national, state or local codes.
Should owner wish to return the Collector to manufacturer
for repair or replacement under this warranty, Owner
must first secure written authorization from Manufacturer.
Owner shall demonstrate proof of purchase, including a
purchase date, and shall be responsible for all removal
and transportation costs. If Owner cannot demonstrate a
purchase date this warranty shall be limited to the period
beginning from the date of manufacture stamped on the
Collector. Manufacturer reserves the right to deny warranty
coverage upon Manufacturer’s examination of Collector.
This warranty is restricted to the Owner and cannot be
assigned.
Some States and Provinces do not allow the exclusion
or limitation of certain warranties. In such cases, the
limitations set forth herein may not apply to the Owner. In
such cases this warranty shall be limited to the shortest
period and lowest damage amounts allowed by law. This
warranty gives you specific legal rights and you may also
have other rights which vary from State to State or Province
to Province.
Owner shall be responsible for all labor and other charges
incurred in the removal or repair of the Collector in the
field. Please also note that the Collector must be installed
in such a manner that if any leak does occur, the flow of
water from any leak will not damage the area in which it is
installed.
Environment and recycling
Please help us to protect the environment by disposing of the
packaging in accordance with the national regulations for waste
processing.
This Warranty is valid for U.S.A. & Canada only. Warranties
may vary by country. Please consult your local Stiebel Eltron
Representative for the Warranty for your country.
!The installation and first operation of this appliance
should be carried out by a qualified installer.
!The company does not accept liability for failure of
any goods supplied which have not been installed
and operated in accordance with the manufacturer’s
instructions.
11. Warranty

Due to our continuous process of engineering and technological
advancement, specifications may change without notice.
Stand 8643
STIEBEL ELTRON, Inc.
17 West Street | West HatfieldMA ''
Tel. [phone] | Fax [phone]
[email protected]
www.stiebel-eltron-usa.com
4<AMHCMO=bcajhb>
A 330772-40358-9271