STIEBEL ELTRON SEFLOWSTARPUMPSTATION User Manual

OPERATION AND INSTALLATION

RESIDENTIAL SOLAR PUMP STATION

» SE FLOWSTAR PUMP STATION

INSTALLATION INSTRUCTIONS

SE FLOWSTAR PUMP STATION - 221337

Simply the Best

Table of Contents

1 For your safety

1.1 About this manual

1.2 Designated use

1.3 Qualifi cation of the installer

1.4 Hand-over of the system (specialist)

1.5 General safety instructions

1.6 General instructions regarding solar fl uid

1.7 Frost damage

2 Description of the product

3 Assembly and installation

3.1 Wall-mounted confi guration

3.2 Tank-mounted confi guration

3.3 Wiring the pump

4 Commissioning

4.1 Flushing and fi lling the solar circuit

4.2 Preparation for fl ushing

4.3 Flushing the system

4.4 Filling the system

4.5 Setting the solar thermal system

1 For your safety

1.1 About the manual

This manual describes the function, installation,
commissioning adn operation of a Stiebel Eltron SE
Flowstar pump station. For other components of the solar
installation, such as collectors, storage tanks, expansion
tanks, controllers, and any other components, please refer
to the specifi c manuals for those parts.

1.2 Designated use

The solar station is a pre-assembled fi tting assembly
checked for tightness and used for recirculating the solar
fl uid in the solar circuit. The solar station must only be
used in solar thermal systems as pumping station. It must
be mounted in the return line of the solar circuit, taking into
consideration the technical limit values indicated in this
manual. The station may only be assembled indoors. The
station must be assembled and operated as described in
this manual!

1.3 Qualifi cation of the installer

5 Cleaning

6 Maintenance and decommissioning

6.1 Draining the solar system

6.2 Replacing the pump

7 Spare parts

8 Technical data and pressure drop characterisics

9 Commissioning log

CAUTION: READ ALL INSTRUCTIONS BEFORE

!



INSTALLING THIS PUMP STATION. ADDITIONAL

ITEMS WILL BE NEEDED TO MOUNT THIS ASSEMBLY.

17 West St., W. Ha tfi el d, MA 01088

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Installation and commissioning of this equipment should
be done by qualifi ed installers [specialist] in accordance
with local, state and federal codes which may be
applicable.

The following must also be observed during installation and
commissioning:

» Relevant regional and national regulations
» Relevant accident prevention regulations
» Instructions and safety instructions mentioned in

this manual

1.4 Hand-over of the system

After installation and commissioning, the installer is
responsible for familiarizing the end user with the functions
of the system and the basic safety measures.

INSTALLATION INSTRUCTIONS

SE FLOWSTAR PUMP STATION - 221337

Simply the Best

» After commissioning, fi ll in the log on the last

page of this manual.

» Hand the manual over to the end user. Instruct

the end user to keep the manual in close
proximity to the system.

» Instruct the end user to have the solar station

serviced and repaired by a specialist only. The
controller settings must not be changed by the
end user.

» Explain to the end user the function of the system

and of the safety devices. Point out to the end
user that the shell must remain mounted during
operation and that the check valve with temperature
gauge and the ball valve in the fl owmeter must be
open.

1.5 General safety instructions

Before installing and commissioning the product, you must
read and observe the following safety instructions:

A. Danger of scalding due to escaping vapor

If the system pressure is too high, hot solar fl uid will escape
from the pressure relief valves and can result in scalding.
Flush and fl l the system only if the collector temperatures
are below 150F (70C).

Connect a discharge line to the safety assembly. Observe the
instructions regarding the pressure relief valve.

damage and personal injury.

In operation, the ball valve with temperature gauge and the
ball valve at the fl owmeter must always be open.

Close the ball valve only when service is required.

1.6 General instructions regarding solar fl uid

Propylene glycol is hazardous in the case of ingestion. It is
an irritant when it comes into contact witht he eyes or skin.

Always wear chemically resistant protective gloves and
safety glasses with side-shields when handling propylene
glycol mixtures.

1.7 Frost damage

Observe the instructions and specifi cations of the antifreeze
from the manufacturer.

It often happens that solar thermal systems cannot be
completely drained after fl ushing. Thus, there is a risk of
frost damage when fl ushing with water. Therefore, the solar
thermal system should only be fl ushed and fi lled with the
solar fl uid used later on.

Strictly follow the instructions of the antifreeze manufacturer
for operating a solar thermal system. All components in
the solar station are resistant to a percentage of propylene
glycol of up to 50%.

B. Risk of burns

The valves, fi ttings and the pump may heat up to more
than 212 °F (100 °C) during operation.

C. Personal injry and material damage caused by excess
pressure

Closing the ball valves both in the return and supply line of
the solar circuit, will disconnect the safety assembly from
the heat exchanger. Heating the storage tank can result in
the formation of high pressures, which may lead to material

17 West St., W. Ha tfi el d, MA 01088

| 800.582.8423 | 413.247.3380 | fax [phone] | [e-mail] | www.stiebel-eltron-usa.com

Determine quantity according to system volume. See
instructions of the collectors, storage tank and expansion
tank.

2 Description of the product

This solar pump station is designed to be mounted in one
of two ways. Both mounting options are discussed in the
manual. It can be mounted either on a wall support and
held by clip springs, or on a Stiebel Eltron solar storage tank
using a tank mounting kit.

INSTALLATION INSTRUCTIONS

SE FLOWSTAR PUMP STATION - 221337

Simply the Best

The pump station contains important valves, fi ttings, and
safety equipment to ensure the proper operation of the solar
thermal system.

Below is a brief overview of the pump station components:

To prevent thermosiphoning of the system, a check valve
must be installed on the supply line of the solar circuit.
Stiebel Eltron provides a check valve as part of our tank
mounting kits.

3 Assembly and installation

The solar station may only be installed indoors with a power
supply of 120 V / 60 Hz. The installation site must be dry,
stable and frost-free.

NOTE: Since the solar fl uid may be very hot near the
collector, the pump station must be
installed at a suffi cient distance from the collector fi eld.
A system pre-cooling vessel may be need to protect the
expansion tank from excessively high temperatures.

3.1 Wall-mounted confi guration

1. Remove the pump station from the packaging.

2. Pull off the front shell.

3. Copy the mounting holes next to the temperature gauges
of the pump station to the mounting surface.

4. Drill the holes and fasten the pump station to the wall
using the enclosed screws and, if required, the enclosed
wall anchors.

17 West St., W. Ha tfi el d, MA 01088

| 800.582.8423 | 413.247.3380 | fax [phone] | [e-mail] | www.stiebel-eltron-usa.com

INSTALLATION INSTRUCTIONS

SE FLOWSTAR PUMP STATION - 221337

Simply the Best

5. Connect the pump station to the system by means of the
top and bottom connections. The bottom connection should
be piped to the heat exchanger outlet of the storage tank.
The top connection should be piped to return to the collector
fi eld. It is recommended to ensure the seal of all threaded
connections by using tefl on tape and pipe dope.

6. To prevent thermosiphoning, install a check valve in the
supply line of the solar circuit.

8. Connect the expansion tank at the connection below
the pressure gauge. Stiebel Eltron provides kits for quick
connection of the expansion tank, but it is sold separately.

9. Adapt the initial pressure of the expansion tank to
the system and connect the expansion tank. For more
information regarding the installation of the expansion tank,
please see the installation manual for that expansion tank.

10. Check all threaded connections and retighten them.

3.2 Tank-mounted confi guration

This section describes how to mount an SE Flowstar pump
station onto an SBB tank using a low tank mounting kit.
These components are sold separately.

1. Remove the pump station from the packaging.

2. Pull off the front shell.

7. Connect the discharge line to the pressure relief valve
connection. Pipe this discharge line to a heat-resistant
container.

3. Observe the lower connector of the pump station.
Remove the ¾˝ NPT adapter, revealing a ¾˝ BSP threaded
connection.

4. Inspect the threads of the tank to make sure they are
clean and free of debris.

17 West St., W. Ha tfi el d, MA 01088

| 800.582.8423 | 413.247.3380 | fax [phone] | [e-mail] | www.stiebel-eltron-usa.com