STIEBEL ELTRON SB 300 E, SB 400 E Operation And Installation
OPERATION AND INSTALLATION
FUNCIONAMIENTO E INSTALACIÓN
MODE D’EMPLOI ET INSTALLATION
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» SB 300 E
» SB 400 E
Conforms to ANSI/UL Std. 174
Certified to CAN/CSA Std. C22.2 No. 110-94
Conforme a ANSI/UL Std. 174
Certificación con CAN/CSA Std. C22.2 No. 110-94
Conforme à la norme ANSI/UL Std. 174
Certifié à la norme CAN/CSA Std. C22.2 No. 110-94
Tested and certified by WQA to NSF/ANSI372
for lead free compliance.
Probado y certificado por WQA NSF/ANSI 372 para
el cumplimiento de las regulaciones sin plomo.
Testé et certifié par WQA à la NSF/ANSI 372 pour
une utilisation sans plomb.
CONTENTS
SPECIAL INFORMATION
OPERATION
1. General information ____________________________________3
2. Safety _____________________________________________________3
2.1 Intended use _________________________________________________3
2.2 Incorrect use _________________________________________________ 3
2.3 General safety instructions _______________________________3
2.4 Heat exchanger loop _______________________________________ 3
2.5 Test symbols _________________________________________________3
3. Register your product __________________________________4
4. Appliance description __________________________________4
4.1 Heating the DHW tank _____________________________________4
5. Using the electric heating element ____________________4
6. Maintenance and care __________________________________4
6.1 Temperature / pressure relief valve _____________________5
6.2 Decalcification _______________________________________________ 5
6.3 Replacement of the sacrificial anode ___________________ 5
7. Plumbing troubleshooting _____________________________5
7.1 Notifying a qualified contractor _________________________5
7.2 Safety label __________________________________________________6
8. Safety _____________________________________________________6
8.1 General safety instructions _______________________________6
8.2 Instructions, standards and regulations _______________6
9. Preparations _____________________________________________6
9.1 Transport _____________________________________________________6
9.2 Storage ________________________________________________________ 7
9.3 Delivery configuration _____________________________________7
9.4 Installation site ______________________________________________7
9.5 Siting the appliance ________________________________________7
10. Installation _______________________________________________8
10.1 Water connection ___________________________________________8
10.2 Heating connection _________________________________________9
10.3 Power supply ________________________________________________ 9
11. Commissioning ________________________________________ 10
11.1 Commissioning ____________________________________________ 10
11.2 Recommissioning _________________________________________ 10
12. Shutting down _________________________________________ 10
13. Electrical Troubleshooting ___________________________ 10
13.1 Resetting the high limit safety cut-out _______________ 11
14. Maintenance and cleaning ___________________________ 11
14.1 Removing the heating element cover _________________ 11
14.2 Draining the tank _________________________________________ 11
14.3 Descaling the electric element _________________________ 11
14.4 Valves _______________________________________________________ 11
14.5 Replacing the electric element cover _________________ 11
15. Specifications __________________________________________ 12
15.1 Dimensions _________________________________________________ 12
15.2 Features ____________________________________________________ 13
15.3 Data table ___________________________________________________14
15.4 Spare parts_________________________________________________ 15
15.5 Spare parts list ____________________________________________ 15
15.6 Wiring diagram _________________________________________________ 16
16. Environment and Recycling _______________________________ 16
17. Warranty ____________________________________________________ 17
SPECIAL INFORMATION
- Observe all applicable national and regional regulations and instructions during installation.
- The appliance is not approved for outdoor
installation.
- If the appliance is permanently connected to the
power supply, ensure that the appliance can be
separated from the power supply by an isolator
that disconnects all poles with at least 1/8˝/4 mm
contact gap. Contactors, disconnect switches or
circuit breakers can be used for this.
- Observe the safety regulation to prevent contact
with dangerous ‘live’ currents.
- The appliance is pressurized. During the heat-up
process, expansion water will drip from the safety
valve.
- Regularly activate the safety valve to prevent
it from becoming blocked, e.g. by limescale
deposits.
- Install a type-tested safety valve in the cold water
supply line.
- The maximum pressure in the cold water supply
line must be at least 20% below the response
pressure the safety valve. If the maximum pressure in the cold water supply line is higher, install
a pressure reducing valve.
- Size the drain so that water can drain off unimpeded when the safety valve is fully opened.
- Fit the discharge pipe of the safety valve with a
constant downward slope and in a room without
risk of frost.
- The safety valve discharge aperture must remain
open to atmosphere.
- Never set the heat exchanger loop pressure
greater than the potable (domestic) water supply
pressure. If potable water pressure is too low, a
booster pump may be needed to assure that it exceeds the required heat exchanger loop pressure.
2 |SB 300-400 E www.stiebel-eltron-usa.com
OPERATION
General information
OPERATION
1. General information
The chapters “Special information” and "Operation" are intended
for appliance users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
Note
Read these instructions carefully before using the appliance and retain them for future reference.
Pass on the instructions to a new user if required.
2. Safety
2.1 Intended use
The appliance is intended for DHW heating within the application
limits. See 15.3, “Data table”, pg. 14.
The appliance is intended for domestic use, i.e. it can be used
safely by untrained persons. The appliance can also be used in a
non-domestic environment, e.g. in a small business, as long as it
is used in the same way.
Any other use beyond that described shall be deemed inappropriate. Observation of these instructions and of instructions for any
accessories used is also part of the correct use of this appliance.
WARNING Scalding
The water in the DHW tank can be heated to temperatures in excess of 149 °F (65 °C). T here is a risk of scalding
at outlet temperatures in excess of 110 °F (43 °C).
f Ensure you do not come into contact with the water
when discharged.
WARNING Burns
Touching hot components can lead to burns.
When working on hot components, always wear protective working clothing and safety gloves.
The pipework connected to the DHW outlet of the appliance can reach temperatures in excess of 149 °F (65 °C).
CAUTION
!
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. T his value must be marked with a
maximum set pressure not to exceed the marked maximum working pressure of the water heater. Install the
valve into 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.
ENGLISH
2.2 Incorrect use
The following are not permitted:
- Heating liquids other than potable water
- Operating the appliance with an empty DHW tank
- Operating the appliance outside the application limits (See
15.3, “Data table”, pg. 14)
- Interrupting the power supply
2.3 General safety instructions
Only qualified contractors should carry out the electrical work and
installation of this appliance. Qualified contractors are responsible
for adherence to all applicable regulations.
Operate the appliance only when fully installed and with all safety
equipment fitted.
WARNING
Contact with live components presents a threat to life.
Damage to the electric insulation or to individual components may result in a threat to life.
f If there is damage to the insulation, disconnect the
power supply and arrange a repair.
All work on the electrical installation must be carried
out by a qualified contractor.
Caution
!
Only operate the appliance when the DHW tank has been
filled.
Caution
!
Keep the appliance installation room free from air contaminated with oil or salt and corrosive or explosive substances.
2.4 Heat exchanger loop
The SB E tanks have an indirectly fired heat exchanger loop. This
may be used in a variety of scenarios which include boiler loops,
geothermal systems, radiant floor loops, etc. Since the interior
of the heat exchanger is uncoated carbon steel, they must be
configured in a closed loop.
Use only a mixture of inhibited propylene glycol and de-ionized
water. The percentage of the glycol in the mixture depends upon
the climate. Some areas require that the propylene glycol be
GRAS, which is a food grade liquid (Heat exchanger type SW,
AWWA Fluid Class II - see MSDS for handling instructions).
2.5 Test symbols
See 7.1.1, “Sample type plate”, pg. 5.
www.stiebel-eltron-usa.com SB 300-400 E | 3
OPERATION
Register your product
3. Register your product
NOTE:
You must register this product within 90 days of purchase on our web site in order to activate any standard
warranty or to be eligible for the extended warranty.
Go to our website 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 as follows:
Model, Example: SB 300 E (from the label that is on the side of
the unit)
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.
If either of the last two heating methods require a temperature
sensor, 2 ports are provided on the opposite side of the tank from
the auxiliary and heat exchanger connections.
5. Using the electric heating element
A 3 kW electric heating element comes standard with this product.
The element has a built-in temperature probe that detects the tank
water temperature.
The appliance’s 3 kW electric resistance heating element is factory
preset at 125 °F (52 °C). The setpoint of the heating element can
be changed easily. A knob is located under the heating element
and can change the level of comfort to meet the needs of the user.
The heating element can be either unplugged during a period of
disuse or removed entirely.
For convenience, the heating element can be removed from the
tank without draining it.
Thermostat knob
Setpoint notch
4. Appliance description
The appliance is designed for indoor installation. The appliance
is equipped to heat water through a number of different heating
methods.
There are three ways that this unit can heat water:
- 3 kW electric resistance heating element
- Indirect heat via internal coil heat exchanger
- Indirect heat via auxiliary inlet/outlet ports
The entire heater and hot water system must be filled with water
and have adequate air ventilation. If used, please refer to the solar
collectors and the boilers installation instructions.
4.1 Heating the DHW tank
The first method of heating is by the 3 kW electric resistance heating element. This is the appliances most basic mode of operation.
An integral temperature sensor detects the thermal energy content
of the amount of heat in the DHW tank. The water in the DHW
tank is heated if the amount of heat is lower than that required to
achieve the set temperature.
The second method of heating is by the internal coil heat exchanger. This heat exchanger is designed to have a heat transfer
fluid circulate through it from an indirect heater. This indirect
heater can be a closed loop solar thermal system, boiler or other
traditional appliance that generates heat and transfers it through
a corrosion inhibited heat transfer fluid.
The third method of heating is by auxiliary ports located on the
side of the unit. These auxiliary ports offer direct access to the
domestic water in the tank. A flat plate heat exchanger should be
used to exchange heat between an indirect heater and the water
in the tank.
6. Maintenance and care
Routine care and maintenance extends the life expectancy and
operating safety of the hot water storage unit. The outer casing
should be cleaned with a slightly damp cloth and commercially
available neutral cleaning agent. This should be done on a regular
basis.
WARNING
Never spray the appliance with water.
Never spray water into the appliance.
WARNING Injury
!
Maintenance work, such as checking the electrical safety, must only be carried out by a qualified contractor.
4 |SB 300-400 E www.stiebel-eltron-usa.com
OPERATION
Plumbing troubleshooting
Appliance compo-
Care and maintenance tips
nents
Casing Use a damp cloth to clean the casing sections. Never
use abrasive or corrosive cleaning agents.
DHW tank
The DHW tank is equipped with a sacrificial anode
and wear indicator to safeguard it against corrosion.
The wear indicator should be checked regularly. Otherwise there is a risk of corrosion.
Electric resistance
heater
Check the condition of the electric resistance heater.
This will extend the expected life of the element.
6.1 Temperature / pressure relief valve
WARNING: The T&P relief valve is designed to relieve
!
built up pressure in the water heater. Fluid may be
discharged at high temperature and/or pressure. Scalding hot
water injuries can occur.
The proper function of the Temperature / Pressure (T&P) relief
valve is required to prevent damage to the hot water storage unit.
The T&P valve needs to be open during cold-water filling of the
unit. When water flows from the relief line at full stream, the tank
is filled, and the T&P valve can be returned to its normal position.
6.2 Decalcification
With hard tap water, a deposit of scale will form on the inside of
the storage unit. Based on professional experience, it is necessary
to decalcify with commercially available solvents at timely intervals. Follow the manufacturers instructions for solvent use. The
hot water storage unit needs to be emptied to do this process. The
clean-out port cover must be removed and sediments on the tank
bottom must be flushed.
6.3 Replacement of the sacrificial anode
Depending on the composition of the tap water, an inspection of
the sacrificial anode at timely intervals is recommended. With
heavy wear, an original equipment replacement anode must be
installed to protect the inner container from corrosion. An inspection should be performed at least once per year.
7. Plumbing troubleshooting
Problem Cause Remedy
Inadequate
water pressure
Hot water flow
inadequate
Hot water
storage tank not
being heated
Faucet flow rate
inadequate
Hot water supply exhausted
too quickly
7.1
If you cannot remedy a failure, notify your qualified contractor. To
facilitate and speed up your request, provide the serial number
from the type plate (000000-0000-00000). The type plate can be
found on the left, above the "DHW outlet" connection.
7.1.1 Sample type plate
Shut-off valve is not completely open.
OR
Cold or hot water line is ob-
Open shut-off valve. Clean or
replace pipes.
structed.
Indirect boiler setpoint tem-
perature is too low.
Recommended 176–185 °F
(80–85 °C).
OR
Heat exchanger is calcified.
Program selection at the
heater control is not properly
Set boiler to recommended
temperature
OR
Clean heat exchanger.
Select and set program per
instructions.
selected.
Aerator at the extraction
Unscrew aerator and clean.
point is blocked.
Flow rate is too high. Rec-
ommended 2.6–3.9 gpm
Restrict spigot valve rate.
(9.8–14.7 l/min).
Notifying a qualified contractor
Made in EU
Hecho en EU
Fabriqué en EU
SB 300 E
M-NO.: 234110
S-NO.:
Technical data
Datos técnicos
Données techniques
Volume:
Volumen:
Volume:
293 l / 77.4 gal
Supply:
Alimentación:
Alimentation:
220-240 V AC, 60 Hz
SINGLE PHASE L-L ONLY
Power:
Potencia:
Puissance:
3 kW / 10,239 BTU/h
Max. pressure:
Presión máxima:
Pression max:
1 MPa / 145 PSI
Testing pressure:
Presión de prueba:
Pression d'essai:
1.5 MPa / 217 PSI
Standby loss:
Pérdida de calor:
Pertes en mode de veille:
2.8 kWh/24h
Heat exchanger
Intercambiador de calor
Échangeur de chaleur
Max. pressure:
Presión máxima:
Pression max.:
1 MPa / 145 PSI
Heating surface:
Superficie de calefacción:
Surface de chauffe:
2
1.5 m
Volume:
Volumen:
Volume:
Max. temp.:
Temperatura máxima:
Temp. max.:
/ 16.1 ft
9.5 l / 2.37 gal
95 °C / 203 °F
4010487
Conforms to UL STD. 174
Certified to CAN/CSA STD. C22.2 No.110-94
2
315277-38053
ENGLISH
www.stiebel-eltron-usa.com SB 300-400 E | 5
INSTALLATION
Safety
M-NO.: 234111
S-NO.:
Technical data
Datos técnicos
Données techniques
Volume:
Volumen:
Volume:
413 l / 109.1 gal
Supply:
Alimentación:
Alimentation:
220-240 V AC, 60 Hz
SINGLE PHASE L-L ONLY
Power:
Potencia:
Puissance:
3 kW / 10,239 BTU/h
Max. pressure:
Presión máxima:
Pression max:
1 MPa / 145 PSI
Testing pressure:
Presión de prueba:
Pression d'essai:
1.5 MPa / 217 PSI
Standby loss:
Pérdida de calor:
Pertes en mode de veille:
3.0 kWh/24h
SB 400 E
Made in EU
Hecho en EU
Fabriqué en EU
Heat exchanger
Intercambiador de calor
Échangeur de chaleur
Max. pressure:
Presión máxima:
Pression max.:
1 MPa / 145 PSI
Heating surface:
Superficie de calefacción:
Surface de chauffe:
Volume:
Volumen:
Volume:
Max. temp.:
Temperatura máxima:
Temp. max.:
Conforms to UL STD. 174
Certified to CAN/CSA STD. C22.2 No.110-94
2
1.92 m
/ 20.6 ft
11.1 l / 2.9 gal
95 °C / 203 °F
4010487
2
315298-38054
INSTALLATION
8. Safety
Only a qualified contractor should carry out the installation, commissioning, maintenance and repair of the appliance.
8.1 General safety instructions
To prevent the necessity of a warranty claim, use only original accessories and spare parts. If you need spare parts, call
800.582.8423.
8.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
Take note of the appliance type plate and See 15, “Specifications”,
pg. 12.
7.2 Safety label
CAUTION
To reduce the risk of electric shock or fire use only on a utility supply
having a maximum 250 volt, three wire system.
CAUTION
Risk of Electric Shock. Connect branch circuit equipment grounding
means to water heater. For detailed information, refer to instructions.
CAUTION
Risk of Electric Shock and Fire Hazard. Do not connect to supply
by extension cord.
FOR INSTALLED RATING SEE ELEMENT MARKING
Install temperature and pressure protective equipment required by
local codes, but not less than a combination temperature and
pressure relief valve certified as meeting the requirements for Relief
Valves and Automatic Gas Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22, by a nationally recognized testing laboratory
that maintains periodic inspection of production of listed equipment
or materials. The valve must be oriented, provided with tubing, or
otherwise installed so that discharge can exit only within 6 inches
(15 cm) above, or at any distance below, the structural floor, and
cannot contact any live electrical part.
CAUTION
If the water heater is retrofitted with supplemental heating
equipment, you must adjust both the thermostat controlling the
supplemental heat source (located in the water piping) and the
thermostat on the water heater (behind the access panel) to the
same temperature. Failure to adjust both thermostats to the same
temperature can cause loss of proper temperature control.
When a supplemental heat source is connected to the
appliance, a provision must be made to limit the heat
source temperature not to exceed that of the water heater
thermostat setting.
9. Preparations
9.1 Transport
CAUTION Injury
!
f Take note of the weight of the appliance.
f Use suitable transport aids (e.g. a hand truck) and
enough personnel for transportation.
Caution
!
The appliance is top heavy.
f Make sure the unit is not tilted.
f Only set the appliance down on an even base.
Do not unpack the appliance until it has arrived in the final installation room.
Leave the appliance in its packaging and on the pallet. This enables
horizontal transport and provides places to rest during transport.
Vehicular transport
Caution
!
The appliance must generally be stored and transported
vertically.
f Observe the information on the packaging.
Safety label on the appliance
6 |SB 300-400 E www.stiebel-eltron-usa.com
INSTALLATION
Preparations
1
1 Recessed grips
Transport from vehicle to installation room
The cardboard box has reinforced recessed grips along the top of
the appliance. You can use these recessed grips, as well as the
pallet at the lower end, to carry the appliance into the installation
room. Take note of the weight of the appliance and ensure a sufficient number of personnel is available for handling the appliance.
9.2 Storage
If it is necessary to store the appliance for a prolonged period
before installation, observe the following information:
- Only store the appliance in a vertical position. Never store
the appliance horizontally.
- Store the appliance in a location that is dry and largely
dust-free.
- Protect the appliance from coming into contact with corrosive
substances.
- The floor of the installation room must be level and have sufficient load bearing capacity. Take note of the weight of the
appliance with a full DHW tank (See 15.3, “Data table”, pg.
14). A floor with insufficient weight capacity is in danger of
collapse. If the appliance is not evenly balanced, there may
be a risk of appliance damage.
- Always leave sufficient distance to provide access for installation, maintenance and cleaning. Observe the required minimum clearances (See 9.5, “Siting the appliance”, pg. 7).
- Ensure that the operation of other equipment in the installation room is not impaired.
- To reduce the required plumbed tube length, install the unit
very close to the point.
D0000034797
The following installation locations are not permissible, due to
risk of appliance damage:
- Locations where the air is contaminated with oil or salt
- Saline environments
- Areas in proximity to high frequency machines
- Places where the air contains ammonia (e.g.sewage works)
- Places where the air contains chlorine (e.g.swimming pools)
- Generally places where the air is strongly contaminated, e.g.
due to dust, or contains aggressive substances
9.5 Siting the appliance
f Carefully undo the cardboard packaging at the clips.
1
ENGLISH
9.3 Delivery configuration
The hot water storage tank arrives with the following equipment:
-Storage unit
- Welded steel plain-ended pipe heat exchanger
- Hot water corrosion protection with special enamel coating
- Three immersion sleeves for housing of temperature probes
- Magnesium sacrificial anode
-Circulation port
- Two auxiliary heating ports
- Attached flange inspection cover
- PU foam insulation 2 in. thick
- Steel outer cover
9.4 Installation site
The appliance is not approved for outdoor installation except for
garages.
Further requirements regarding the installation room and appliance positioning, to prevent appliance damage:
- The installation location must be free from flammable, highly
combustible gases and substances, as well as high levels of
dust.
- The installation room must be free from the risk of frost.
D0000034797
1 Cardboard packaging clips
The appliance is secured to the pallet with metal brackets and
screws. The metal brackets are hooked on to the feet underneath
the floor plate of the appliance.
www.stiebel-eltron-usa.com SB 300-400 E | 7
INSTALLATION
Installation
1 Metal bracket fixing screw
f Remove the fixing screw of the metal bracket from the pallet.
f Tilt the appliance to the side for each foot. Screw out the
adjustable tank foot, remove the brackets, and screw in the
adjustable tank foot.
Caution
!
Take note of the appliance's weight and top-heaviness.
f Slightly tip the appliance and carefully roll the appliance off
the pallet.
f Bring the appliance in its final location.
Minimum clearances
f Maintain the minimum clearances.
Caution
!
The appliance must be straightened vertically to avoid
appliance damage.
The feet under the floor plate of the appliance are
height-adjustable.
f Level the appliance horizontally using the height-ad-
justable feet.
10. Installation
WARNING Injury
!
Incorrect installation can lead to serious personal injury.
Before any work, ensure sufficient clearances for the
installation.
Handle sharp-edged components carefully.
10.1 Water connection
Caution
!
Carry out all water connection and installation work in
accordance with local plumbing regulations.
The following material combinations are approved for metal pipework installations:
Cold water inlet DHW outlet
Copper pipe Copper pipe
Steel pipe Steel pipe or copper pipe
f Thoroughly flush the pipework before connecting the ap-
pliance. Foreign bodies, such as welding pearls, rust, sand
or sealant can impair the operational reliability of the
appliance.
Caution
!
To protect the stubs against corrosion the water tube connection must be made with flat gaskets. The use of hemp
on stub threads is not permissible.
Safety valve
The appliance is a sealed unvented DHW tank. Provide the
appliance with a pressure relief valve.
f Install a type-tested safety valve in the T&P port on the side
of the unit. The response pressure of the safety valve must be
below or equal to the permissible operating pressure of the
DHW tank.
The safety valve protects the appliance against unacceptable excess pressure.
f Ensure that the expansion water escaping from the safety
valve can drip into a drain, e.g. a tank or sink.
Ensure the drain cannot be shut off.
f Size the drain in a way that water can drain off unimpeded
when the safety valve is fully opened.
f Ensure that the discharge pipe of the safety valve is open to
atmosphere.
f Fit the discharge pipe of the safety valve with a constant
downward slope and in a room free from the risk of frost.
Pressure reducing valve
The maximum pressure in the cold water supply line must be at
least 20% below the response pressure the safety valve. If the
maximum pressure in the cold water supply line is higher, install
a pressure reducing valve.
Drain valve
f Install a suitable drain valve at the lowest point in the cold
water inlet line.
8 |SB 300-400 E www.stiebel-eltron-usa.com
INSTALLATION
Installation
DHW circulation
The heat losses incurred in the DHW circulation line and the electrical power consumption of the circulation pump reduce the efficiency of the system. The cooled water in the circulation line mixes
with the tank content. Where possible, avoid installing a DHW
circulation line. Where that is not possible, the DHW circulation
pump must be controlled thermally or by time switch.
Thermal insulation
f Insulate the DHW line against heat loss in accordance with
locally applicable regulations.
10.2 Heating connection
The heating system can be configured in a variety of ways. The
methods described here are for the most common installation
method. For more questions on installation and configuration of
the heating system, contact Stiebel Eltron.
10.2.1 Connecting to the internal coil heat exchanger
The internal coil heat exchanger connections are 1˝ NPT female.
A common use of this coil is for closed-loop solar thermal applications, like in the below image.
To solar
10.2.2 Connecting to the auxiliary ports
The auxiliary ports can be used to add another heating source,
or to supply heat stored in the tank to another location. If the
auxiliary ports are unused for heating, they can be used for a
DHW recirculation loop.
From aux.
heat source
To aux.
heat source
ENGLISH
From solar
V
Ball valve
Flow meter
Check valve
Temp. gauge
T
T&P valve
Pres. gauge
A few necessary features of this system include:
- Corrosion inhibiting propylene glycol
- Air separator/eliminator
- Circulation pump
T
V
Air separator
Expansion tank
Circulation pump
Air/dirt separator
Check valve
Circulation pump
Flat-plate HX
It is necessary for both sides of the heat exchanger to have circulation pumps and air/dirt separators. A check valve is also recommended to prevent thermosiphoning.
Consult your local plumbing code for requirements regarding heat
exchanger properties (double wall, brazed, stainless steel, etc.)
10.3 Power supply
WARNING
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
If the appliance is permanently connected to the power supply,
ensure that the appliance can be separated from the power supply by an isolator that disconnects double terminal with at least
3mm contact gap. Contactors, mains isolators or fuses can be
used for this.
Disconnect the appliance from the power supply before carrying
out work on the control panel. Prevent the power supply from
being switched on while you are working on the system.
Ensure the appliance is earthed according to locally applicable
requirements.
www.stiebel-eltron-usa.com SB 300-400 E | 9
INSTALLATION
Commissioning
10.3.1 Installing the power cable
Caution
!
Never connect the appliance to the power supply before
the DHW tank is filled.
The power to this appliance is delivered with a power cable with
a mains plug.
f Use minimum 14/2 (with ground) AWG copper wire for in-
stallation. For long wire lengths, you may need to increase
the gauge size. Always install in accordance with all national
and local electrical codes.
f Unit shall be connected to a 15 A dual pole breaker.
f Using the 14/2 wire (or larger if the code calls for it), connect
the 14/2 wire to the 3 wires in the junction box as shown.
f Use the proper strain relief grommet where the wire enters
the junction box.
See 15.6, “Wiring diagram”, pg. 16.
11. Commissioning
11.1 Commissioning
Caution
!
Never connect the appliance to the power supply before
the DHW tank is filled.
11.1.1 Filling the DHW tank
Fill the DHW tank and vent the pipework by following the procedure below:
f Close the drain valve.
f Open all DHW tap points and the shut-off valve in the cold
water supply.
f Close the DHW tap points as soon as water starts to emerge
from them.
11.1.2 Appliance handover
f Explain the appliance function to users and familiarize them
with its operation.
f Make users aware of potential dangers, especially the risk of
scalding.
f Make users aware of critical environmental factors and re-
quirements concerning the installation location.
f Inform users that water may drip from the safety valve
during the heating operation.
f Hand over these operating and installation instructions to
users for safe-keeping.
12. Shutting down
Caution
!
If the appliance is disconnected from the power supply,
it is no longer protected against frost.
f Only disconnect the appliance from the power sup-
ply for longer periods if you are also draining the
DHW tank.
If there is no usage of hot water for a long period of time, always
drain the DHW tank. See 14.2, “Draining the tank”, pg. 11.
The appliance can only be switched off by interrupting the power
supply.
f Pull the mains plug from the socket or disconnect the appli-
ance from the mains in the fuse box.
13. Electrical Troubleshooting
WARNING Risk of Electric Shock
Prior to all work on the appliance, isolate it from the
power supply.
Caution
!
If you disconnect the appliance from the power supply, it
is no longer protected against frost.
f Only disconnect the appliance from the power sup-
ply for longer periods if you are also draining the
DHW tank.
f For work on the electric heating element, remove the heating
element cover (See 14.1, “Removing the heating element
cover”, pg. 11).
If the unit does not provide hot water, then the heating element
is likely not heating the water.
1 Check that the circuit breaker is in the on position. Reset if
necessary.
2 Inspect the connections inside the junction box. Repair if
necessary.
3 Check the voltage at the junction box connections. The volt-
age should be 240 VAC.
4 Check for proper resistance of the heating element.
f Turn off circuit breaker.
f Disconnect wire nuts on L1 and L2 and separate wires.
f Measure the resistance between the two black wires going
into the conduit of the tank. It should measure 17.6 Ω ±10%.
f If the measurement is off, there may be an internal wiring
problem or a faulty heating element. Call Stiebel Eltron for
technical support.
11.2 Recommissioning
If the appliance is switched off due to an interruption to the power
supply, no specific measures for restarting are required once the
power supply has been restored.
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Note
Refit the heating element cover after completing your
work. See 14, “Maintenance and cleaning”, pg. 11).
INSTALLATION
Maintenance and cleaning
13.1 Resetting the high limit safety cut-out
The high limit safety cut-out protects the appliance from overheating. The cut-out switches off the electric element when the tank
water temperature exceeds 199–208 °F (93–98 °C).
Once the cause of the failure has been removed, press the reset
button of the high limit safety cut-out on the rod thermostat. To
do so, remove the appliance cover.
Thermal safety
cut-out
14. Maintenance and cleaning
WARNING
Prior to all work on the appliance, isolate it from the
power supply.
14.1 Removing the heating element cover
f Undo the screws that fasten the heating element cover to the
appliance.
f Pull off the cover.
14.2 Draining the tank
WARNING Burns
Hot water may escape when draining the DHW tank.
To drain the DHW tank, e.g. when shutting the appliance down,
proceed as follows:
f Unplug the appliance from the power supply.
f Close the shut-off valve in the cold water supply line.
The DHW tank is drained via the cold water supply line.
f Open the drain valve installed in the cold water supply line
(See 10.1, “Water connection”, pg. 8). If no drain valve
has been installed, undo the cold water supply line at the
"cold water inlet" connection.
f Open one tap in one sink.
Some residual water will remain in the lower section of the DHW
tank.
14.3 Descaling the electric element
Only descale the flange of the electric booster heater after removing it, and never treat the interior of the DHW tank and the
sacrificial anode with descaling agents.
14.4 Valves
Regularly check the system's valves (safety valve, pressure reducing valve, drain valve, vacuum breaker, mixing valve), to ensure the
operational reliability of the appliance. The amount of limescale
deposits depends on the local water quality.
f Check all valves in the system and remove limescale deposits.
f Replace the valves if necessary.
f Check the function of the valves.
f Whether a sand filter is installed.
14.5 Replacing the electric element cover
ENGLISH
Note
Refit the heating element cover after completing your
work.
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WARNING
f Reconnect the earth cable to the appliance cover.
f Place cover back in its original position.
f Secure the screws holding the cover onto the appliance.
INSTALLATION
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15. Specifications
15.1 Dimensions
Type SB 300 E SB 400 E Connection
A Height of tank with insulation 59.1˝ (1501 mm) 59˝ (1500 mm)
B Height of tank without insulation 57.3˝ (1456 mm) 57˝ (1448 mm)
C Height to thermometer 44.4˝ (1128 mm) 45.1˝ (1145 mm)
D Height to upper temperature sensor sleeve 40.5˝ (1028 mm) 42.7˝ (1085 mm) 9 mm
E Height to electric element opening 32.5˝ (825 mm) 34.9˝ (887 mm)
F Height to lower temperature sensor sleeve 23.4˝ (518 mm) 19.6˝ (498 mm) 9 mm
G Height to clean-out port 13.2˝ (335 mm) 12.4˝ (315 mm) 115 mm
H Height to cold water inlet 5.1˝ (129 mm) 4.3˝ (110 mm) 1˝ NPT male
I Height to heat exchanger lower port 10.8˝ (275 mm) 11˝ (280 mm) 1˝ NPT female
J Height to auxiliary heat source lower port 14.8˝ (375 mm) 15˝ (380 mm) 1˝ NP T male
K Height to auxiliary heat source upper port 25.8˝ (655 mm) 28˝ (710 mm) 1˝ NP T male
L Height to heat exchanger upper port 30.5˝ (775 mm) 32.7˝ (830 mm) 1˝ NPT female
M Height to hot water outlet (overall height) 61.1˝ (1552 mm) 60.8˝ (1544 mm) 1˝ NPT male
N Height to T&P valve port 48.3˝ (1228 mm) 48.3˝ (1228 mm) ¾˝ NPT female
O Tank diameter without 21.7˝ (550 mm) 25.6˝ (650 mm)
P Tank diameter with insulation 25.6˝ (650 mm) 29.5˝ (750 mm)
Q Foot height 0.9–1.3˝ (22–34 mm)
P
O
2
5
10
7
A
B
4
11
C
D
8
9
M
E
6
F
G
3
1
I
H
Q
L
K
J
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INSTALLATION
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13 14
12
N
15.2 Features
1 Cold water inlet
2 Hot water outlet
3 Clean-out port
4 Electric heating element
5 Analog thermometer
6 Lower heat exchanger port
7 Upper heat exchanger port
8 Lower auxiliary port
9 Upper auxiliary port
10 Upper temperature sensor sleeve
11 Lower temperature sensor sleeve
12 T&P valve port
13 Junction box
14 Anode replacement indicator
ENGLISH
30°
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INSTALLATION
ZĤ¼êÐ|ŒêĒĉń
15.3 Data table
SB 300 E SB 400 E
234110 234111
Hydraulic data
Nominal capacity 79.3 gal (300 l) 105.6 gal (400 l)
Water volume 77.4 gal (293 l) 109.1 gal (413 l)
Internal coil heat exchanger volume 2.4 gal (9.5 l) 2.9 gal (11.1 l)
Internal coil heat exchanger area 16.1 ft² (1.5 m²) 20.6 ft² (1.9 m²)
Heating element
Heating element voltage 220–240 V
Heating capacity 3.0 kW (10,239 BTU/hr)
Frequency 60 Hz
Rated current 12.5 A
Required circuit breaker 15 A
Heating element type Dome element
Heating element material Ceramic
Temperature control Knob with °F & °C scale under the heating element cover
Set range of thermostat 86–167 °F (30–75 °C)
Miscellaneous
Maximum allowed pressure (tank) 145 psi (10 bar)
Maximum allowed pressure (heat exchanger) 145 psi (10 bar)
Maximum tank temperature 203 °F (95 °C)
Tank heat loss in 24 hours at 149°F / tank temperature 2.8 kWh (9,553 Btu) 3.0 kWh (10,236 Btu)
Empty weight 313 lb (142 kg) 399 lb (181 kg)
Filled weight 1,010 lb (458 kg) 1,334 lb (605 kg)
Type of anode Magnesium with wear indicator
Dimensions
Height
Diameter
Insulation thickness 2 in (50 mm) 2 in (50 mm)
Diameter without insulation
1
61
/ 8 in (1552 mm) 60 13/ 16 in (1544 mm)
9
25
/ 16 in (650 mm)
5
21
/ 8 in (550 mm) 25 9/ 16 in (650 mm)
29 ½ in (750 mm)
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INSTALLATION
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15.4 Spare parts
ENGLISH
15.5 Spare parts list
Name Part #
Pos.
1 Heating element assembly cover 315268
2 Clean-out port cover 315266
3 Flange plate 082357
4 Flange gasket 168662
5 Foam insulation for clean-out port 299891
6 3 kW heating element 296391
7 Segmented sacrificial anode 1¼˝ 143499
8 Anode sleeve 166375
9 Thermostat 269978
10 Thermal safety cut-out 279006
11 Thermostat knob 315423
12 Junction box 4x4˝ 315357
13 Electric element holder 315269
14 Gasket cap 298307
15 Terminal block 309566
16 Connection cable (not shown) 315272
17 Adjustable tank foot 291975
18 Thermometer, 32–248 °F (0–120 °C) 315265
19 Rivets for outer jacket 298745
20 T&P valve 100 psi (6.9 bar) 315664
21 Top cover for SB 300 E 315264
21a Top cover for SB 400 E 315297
22 Washer for thermostat (DIN 6797-A6.4)
23 Junction box holder 315271
24 Nut for thermostat (I4032-M6)
25 Screw for element holder (DIN7981-M4.2x16)
26 M12 12x30-8.8 ISO4017 bolt
27 Cable gland 298306
28 Junction box nut 315287
29 Washer (125-3.2-140HV-ZN)
30 Nut (I4032-M 4-4-A0E)
31 Screw for thermostat (DIN7985-M4x6)
32 Screw for terminal block (I4075-M3-18)
33 Nut for terminal block (I4032-M3-6)
34 Screw (DIN 7500 CE M5x8-Z-AoE)
35 Threaded cap seal 306211
36 Threaded cap 309113
Cable loop 315273
Insulating bushing 315540
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INSTALLATION
Environment and Recycling
15.6 Wiring diagram
L2
L1
240 VAC
15 A Dual Pole
Circuit Breaker
Breaker Box
Outlet (Optional)
Wire Nuts
Black
Black
Green/Yellow
SB E Junction Box
Black
Black
Green/Yellow
Anode
Outer Casing
Wire Nuts
Tank
L1L2
Wiring Terminal
Safety Cutout
Thermostat
SB E Junction Box
The above wiring diagram shows the connection between the
circuit breaker and the SB E junction box.
Heating Element
SB E Heating Element
The above wiring diagram shows the internal pre-wired connection of the SB E.
16. Environment and Recycling
We ask you to help protect the environment. After use, dispose
of the various materials in accordance with national and local
regulations.
16 |SB 300-400 E www.stiebel-eltron-usa.com
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