STIEBEL ELTRON HSBC 300 cool Instruction Manual

OPERATION AND INSTALLATION
Integral cylinder
» HSBC 300 cool (AU)

2| HSBC 300 cool (AU) www.stiebel-eltron.com
CONTENTS | SPECIAL INFORMATION
SPECIAL INFORMATION
- The appliance may be used by children over 8
years of age and persons with reduced physi-
cal, sensory or mental capabilities or a lack of
experience and expertise, provided that they
are supervised or they have been instructed
on how to use the appliance safely and have
understood the potential risks. Children must
never play with the appliance. Children must
never clean the appliance or perform user
maintenance unless they are supervised.
- The connection to the power supply must
be in the form of a permanent connection.
Ensure the appliance can be separated from
the power supply by an isolator that discon-
nects all poles with at least 3mm contact
separation.
- Observe all applicable national and regional
regulations and instructions.
- Observe minimum distances (see chapter "In-
stallation/ Preparations/ Installation site").
- Only a qualified contractor should carry out
installation, commissioning, maintenance and
repair of the appliance.
DHW cylinders
- Drain the appliance as described in chapter
"Installation/ Maintenance/ Draining the
DHW cylinder".
- Observe the maximum permissible pressure
(see chapter "Installation/ Specification/ Data
table").
SPECIAL INFORMATION
OPERATION
1. General information �����������������������������������������3
1.1 Relevant documents_____________________________________________ 3
1.2 Safety instructions_______________________________________________ 3
1.3 Other symbols in this documentation _______________________ 3
1.4 Information on the appliance _________________________________ 3
1.5 Units of measurement __________________________________________ 3
2. Safety����������������������������������������������������������4
2.1 Intended use______________________________________________________ 4
2.2 General safety instructions ____________________________________ 4
2.3 Test symbols ______________________________________________________ 4
3. Appliance compatibility �������������������������������������4
4. Appliance description ���������������������������������������4
5. Cleaning, care and maintenance ���������������������������5
6. Troubleshooting ����������������������������������������������5
INSTALLATION
7. Safety����������������������������������������������������������6
7.1 General safety instructions ____________________________________ 6
7.2 Instructions, standards and regulations ____________________ 6
8. Appliance description ���������������������������������������6
8.1 Standard delivery________________________________________________ 6
8.2 Accessories________________________________________________________ 6
9. Preparation ���������������������������������������������������6
9.1 Installation site___________________________________________________ 6
9.2 Transport and handling ________________________________________ 7
10. Installation�������������������������������������������������� 12
10.1 Positioning the appliance _____________________________________ 12
10.2 Heating water connection and safety valve _______________ 12
10.3 DHW connection and safety assembly______________________ 16
10.4 Filling the system_______________________________________________ 16
10.5 Venting the appliance__________________________________________ 17
11. Electrical connection��������������������������������������� 17
11.1 Control voltage __________________________________________________ 18
11.2 Safety extra low voltage_______________________________________ 19
11.3 Sensor installation______________________________________________ 19
12. Commissioning ��������������������������������������������� 20
12.1 Wilo-Para .../Sc circulation pumps__________________________ 20
12.2 Appliance handover ____________________________________________ 21
13. Appliance shutdown ��������������������������������������� 21
14. Maintenance ������������������������������������������������ 21
15. Specification ������������������������������������������������ 22
15.1 Dimensions and connections_________________________________ 22
15.2 Wiring diagram _________________________________________________ 24
15.3 Hydraulic diagrams_____________________________________________ 26
15.4 Data table ________________________________________________________ 26
15.5 Accessories_______________________________________________________ 27
GUARANTEE
ENVIRONMENT AND RECYCLING
OPERATION AND INSTALLATION
Integral cylinders

OPERATION
General information
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 3
OPERATION
1. General information
The chapters "Special information" and "Operation" are intended
for both users and qualified contractors.
The chapter "Installation" is intended for qualified contractors.
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 Relevant documents
Operating and installation instructions for the connected
heat pump
Operating and installation instructions for all other sys-
tem components
1.2 Safety instructions
1.2.1 Structure of safety instructions
KEYWORD Type of risk
Here, possible consequences are listed that may result
from failure to observe the safety instructions.
 Steps to prevent the risk are listed.
1.2.2 Symbols, type of risk
Symbol Type of risk
Injury
Electrocution
Burns
(burns, scalding)
1.2.3 Keywords
KEYWORD Meaning
DANGER Failure to observe this information will result in serious
injury or death.
WARNING Failure to observe this information may result in serious
injury or death.
CAUTION Failure to observe this information may result in non-seri-
ous or minor injury.
1.3 Other symbols in this documentation
Note
General information is identified by the adjacent symbol.
 Read these texts carefully.
Symbol Meaning
Material losses
(appliance damage, consequential losses and environmen-
tal pollution)
Appliance disposal
 This symbol indicates that you have to do something. The ac-
tion you need to take is described step by step.
1.4 Information on the appliance
Connections
Symbol Meaning
Inlet/ intake Red arrow: Hot
Blue arrow: Cold
Green arrow: Neutral
Drain/ outlet Red arrow: Hot
Blue arrow: Cold
Green arrow: Neutral
Domestic hot water
DHW circulation
Heat pump
Heating
1.5 Units of measurement
Note
All measurements are given in mm unless stated oth-
erwise.

OPERATION
Safety
4| HSBC 300 cool (AU) www.stiebel-eltron.com
2. Safety
2.1 Intended use
This appliance is intended to be used for seasonal heating and
cooling of interiors (7°C/ 12°C) and for DHW heating.
The appliance is intended for domestic use. It can be used safely
by untrained persons. The appliance can also be used in non-do-
mestic environments, e.g. in small businesses, as long as it is
used in the same way.
Any other use beyond that described shall be deemed inappro-
priate. Observation of these instructions and of the instructions
for any accessories used is also part of the correct use of this
appliance.
2.2 General safety instructions
WARNING Burns
There is a risk of scalding at outlet temperatures in ex-
cess of 43°C.
!
WARNING Injury
The appliance may be used by children over 8 years of
age and persons with reduced physical, sensory or men-
tal capabilities or a lack of experience and expertise,
provided that they are supervised or they have been
instructed on how to use the appliance safely and have
understood the potential risks. Children must never play
with the appliance. Children must never clean the ap-
pliance or perform user maintenance unless they are
supervised.
!
WARNING Injury
For safety reasons, only operate the appliance with the
front casing closed.
Note
The DHW cylinder is under supply pressure. During the
heat-up process, expansion water will drip from the safe-
ty valve.
 If water continues to drip when heating is complet-
ed, please inform your qualified contractor.
!
Material losses
The system's active frost protection is not guaranteed if
the power supply is interrupted.
 Never interrupt the power supply even outside the
heating season.
2.3 Test symbols
See type plate on the appliance.
3. Appliance compatibility
The appliance can be operated in conjunction with the following
air | water heat pumps:
- WPL 10 AC
- WPL 15/20/25 AC(S)
- WPL 19/24 I
4. Appliance description
The buffer cylinder and DHW cylinder with indirect coil are ar-
ranged one above the other and can be separated for easier han-
dling.
The appliance has a plastic jacket with foam insulation and is
equipped with a removable front casing. The appliance is connect-
ed hydraulically and electrically to the heat pump. All hydraulic
connections are made at the top (heating) and rear (DHW).
In addition to the DHW cylinder and the buffer cylinder, further
system components are integrated:
- Highly efficient circulation pump for a heating circuit without
mixer
- 3/2-way diverter valve
- Cylinder charging pump
DHW cylinders
The steel cylinder is coated on the inside with special direct enam-
el and is equipped with a signal anode. The anode with consump-
tion indicator protects the cylinder interior from corrosion.
The heating water heated by the heat pump is pumped through an
indirect coil inside the DHW cylinder. The heat channelled through
the indirect coil is thus transferred to the domestic hot water.
Buffer cylinder
The steel cylinder provides hydraulic separation between the flow
rates of heat pump and heating circuit. The heating water heated
by the heat pump is transferred into the buffer cylinder by the
cylinder charging pump. When a demand is issued, the integral
heating circuit pump delivers the heating water to the heating
circuit.

OPERATION
Cleaning, care and maintenance
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 5
5. Cleaning, care and maintenance
 Have the electrical safety of the appliance and the function
of the safety assembly regularly checked by a qualified
contractor.
 Never use abrasive or corrosive cleaning agents. A damp
cloth is sufficient for cleaning the appliance.
Signal anode with consumption indicator
!
Material losses
If the consumption indicator changes colour from white
to red, have the signal anode checked by a qualified con-
tractor and if necessary replaced.
D0000085886
1 White = Anode OK
2 Red = Requires checking by qualified contractor
Scaling
Almost every type of water will deposit limescale at high temper-
atures. This settles inside the appliance and affects both perfor-
mance and service life. A qualified contractor who knows the local
water quality will tell you when the next service is due.
 Check the taps regularly. Limescale deposits at the tap out-
lets can be removed using commercially available descaling
agents.
 Regularly activate the safety valve to prevent it from becom-
ing blocked, e.g. by limescale deposits.
6. Troubleshooting
Problem Cause Remedy
The water does not heat
up. The heating does not
work.
There is no power. Check the fuses/MCBs in
your fuse box/distribu-
tion board.
If you cannot remedy the fault, contact your qualified contractor.
To facilitate and speed up your enquiry, please provide the serial
number from the type plate (000000-0000-000000).
No.: 000000-0000-000000
Made in Germany
D0000085887

INSTALLATION
Safety
6| HSBC 300 cool (AU) www.stiebel-eltron.com
INSTALLATION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability only
if original accessories and spare parts intended for the appliance
are used.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
8. Appliance description
8.1 Standard delivery
The following are delivered with the appliance:
- 4 adjustable feet
8.2 Accessories
8.2.1 Required accessories
Safety assemblies and pressure reducing valves are available
to suit the prevailing supply pressure. These type-tested safety
assemblies protect the appliance against impermissible excess
pressure.
8.2.2 Additional accessories
- Pump assembly for a heating circuit with mixer HSBC3-HKM
- Pressure hoses
- Water softening fitting HZEA
- Temperature sensor for cooling
Pipe assembly RBS-SBC
The hydraulic connections can be routed upwards at the rear of
the DHW cylinder using the RBS-SBC pipe assembly available as
an accessory.
9. Preparation
9.1 Installation site
!
Material losses
Never install the appliance in wet rooms.
Install the appliance near the draw-off point in a dry room free
from the risk of frost. To reduce line losses, keep the distance short
between the appliance and the heat pump.
Ensure the floor has sufficient load bearing capacity and evenness
(for weight, see chapter "Specification/ Data table").
The room must not be subject to a risk of explosions arising from
dust, gases or vapours.
If you are installing the appliance in a boiler room together with
other heating equipment, ensure that the operation of the other
heating equipment will not be impaired.
Minimum clearances
≥250 ≥250
≥800
≥100
≥500
≥100
≥500
D0000085888
The minimum side clearances can be swapped between left and
right.

INSTALLATION
Preparation
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 7
9.2 Transport and handling
!
Material losses
Store and transport the appliance at temperatures be-
tween -20°C and +60°C.
Handling
 Undo the 4screws from the non-returnable pallet.
D0000055519
 Tilt the appliance and screw the 4adjustable feet into the
appliance.
 Lift the appliance off the pallet.
If narrow doors or hallways hinder handling, you can separate
the upper and lower sections of the appliance as described in the
following chapters.
9.2.1 Removing/fitting the front casing
D0000085889
 Remove the 2locking screws on the top of the front casing.
 Unhook the front casing towards the top.
 Remove the earth cable from the front casing.
 Fit the front casing in reverse order.

INSTALLATION
Preparation
8| HSBC 300 cool (AU) www.stiebel-eltron.com
9.2.2 Overview of insulation segments
D0000085890
1
24
3
1 Insulation segment1
2 Insulation segment2
3 Insulation material screw
4 Insulation segment3

INSTALLATION
Preparation
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 9
9.2.3 Separating/ joining the appliance sections
Separating the appliance sections
Material losses
Unscrewing the fastening screws destroys the threads in
the insulation segment.
 To open the 3 fixing tabs, loosen the fastening
screws slightly but do not unscrew them completely.
D0000085891
Note
To make removal simpler, the insulation segments have
labelled recessed grips on the left and right.
D0000085892
 Remove insulation segment1.
 Remove insulation segment2.
D0000080287
 Pull the "heating sensor" out of the buffer cylinder.
D0000080288
 Release the sensor lead from the guide groove.
D0000080289
 Disconnect the push-fit connectors of the 4hydraulic con-
nections. To do this, pull the spring clips fully out with a
screwdriver.
 Pull the hydraulic connectors as indicated.

INSTALLATION
Preparation
10 | HSBC 300 cool (AU) www.stiebel-eltron.com
D0000080293
 Remove the 4hydraulic hoses.
 Remove the 2insulation material screws.
 Remove insulation segment3.
D0000085893
 Undo the 2 locking screws on the side profile strips.
 Lift up and unhook the side profile strips.
D0000080343
 Release the 4screws on the tabs at the front of the appliance.
D0000074613
 Pull the upper section of the appliance towards the front.
D0000080345
1
1 Handle
 Tip the upper section of the appliance backwards. Use the
handle for improved grip.
D0000085894
 Place the upper section of the appliance on a base to prevent
damage.

INSTALLATION
Preparation
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 11
Joining appliance sections
Material losses
To prevent condensation forming, the insulation seg-
ments must fit closely against the lower section with no
gaps.
 When inserting the insulation segments, ensure that
the joint grooves are kept clear
 Tap the insulation segments down with your hand.
Rejoin the appliance sections in reverse order.
The positioning aids and the dotted line marking provide assis-
tance when positioning and inserting the upper appliance section
into the guide groove on the lower section:
D0000080346
1
5
4
3
2
1 Handle
2 Guide pin
3 Dotted line (perforation in the panel)
4 Guide groove
5 Positioning aid
D0000057300
1
1 Dotted line (perforation in the panel)
 Place the upper appliance section onto the lower appliance
section along the dotted line.
D0000074614
 Slide the upper appliance section to the back until it is flush
with the lower appliance section. If the appliance sections
are joined correctly, the final position is determined by the
guide groove and guide pin.
 Secure the tabs on the appliance front.
 Fit the side profile strips.
 Fit insulation segment 3 and the 4 hydraulic hoses.
 Connect the push-fit connectors of the 4hydraulic connec-
tions. Ensure that the spring clips click into place.
 Insert the "heating sensor" into the buffer cylinder.
 Lay the sensor lead in the guide groove provided for this
purpose.
 Fit insulation segment2.
 Fit insulation segment1.
 Fit the front casing.

INSTALLATION
Installation
12 | HSBC 300 cool (AU) www.stiebel-eltron.com
10. Installation
10.1 Positioning the appliance
 When positioning the appliance, observe minimum clearanc-
es (see chapter "Preparations/ Installation site").
 Use the adjustable feet to compensate for any unevenness in
the floor.
10.2 Heating water connection and safety valve
10.2.1 Safety instructions
!
Material losses
The heating system to which the appliance is connected
must be installed by a qualified contractor in accord-
ance with the water installation drawings in the technical
guides.
!
Material losses
When fitting additional shut-off valves, install a further
safety valve in an accessible location on the heat gen-
erator itself or in the flow line in close proximity to the
heat generator.
There must be no shut-off valve between the heat gen-
erator and the safety valve.
Oxygen diffusion
!
Material losses
Avoid open vented heating systems and underfloor
heating systems with plastic pipes that are permeable
to oxygen.
In underfloor heating systems with plastic pipes that are per-
meable to oxygen and in open vented heating systems, oxygen
diffusion may lead to corrosion on the steel components of the
heating system (e.g. on the indirect coil of the DHW cylinder, on
buffer cylinders, steel radiators or steel pipes).
!
Material losses
The products of corrosion (e.g. rusty sludge) can set-
tle in the heating system components, which may re-
sult in a lower output or fault shutdowns due to reduced
cross-sections.
Supply lines
 The maximum permissible line length between the appli-
ance and the heat pump will vary, depending on the version
of the heating system (pressure drop). As a standard value,
assume a maximum line length of 10m and a pipe diameter
of 22-28mm.
 Insulate the flow and return lines in accordance with regional
regulations.
 Connect the hydraulic connections with flat gaskets.
Pressure hoses against structure-borne sound transmission:
The appliance and the heat pump are connected to each other
hydraulically via pipes carrying heating water. To reduce the trans-
mission of structure-borne sound on the water side, connect the
appliance to the heat pump with pressure hoses if these are not
already installed in the heat pump.
Pressure differential:
If the available external pressure difference is exceeded, the pres-
sure drop in the heating system could result in a reduced heating
output.
 When sizing the pipes, ensure that the available external
pressure differential is not exceeded (see chapter "Specifica-
tion/ Data table").
 When calculating the pressure drop, take account of the flow
and return lines and the pressure drop of the heat pump.
The pressure drop must be covered by the available pressure
differential.

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 13
10.2.2 Fitting the pump assembly (accessory) if required
WARNING Electrocution
Before starting work on the appliance, disconnect all
poles from the power supply and drain the heating circuit
via the drain valve on the buffer cylinder.
To extend the appliance with a heating circuit with mixer, you can
install pump assembly HSBC 3-HKM (available as an accessory).
Standard delivery HSBC 3-HKM
D0000080357
8
2
4
6
7
1
3
9
5
1 Pipe insulation
2 Connection pipes (*)
3 Temperature sensor
4 Heating circuit pump (*)
5 3-way mixer (*)
6 Insulation mat for 3-way mixer
7 Flat gaskets
8 Servomotor for 3-way mixer (*)
9 Insulation mat for 3-way mixer and heating circuit pump
(*)Pipe assembly
Preparation for installation of HSBC3-HKM
 Remove the front casing and insulation segment1 (see chap-
ter "Installation/ Preparations/ Transport and handling").
The following components are prefitted on the HSBC side at the
pump assembly installation site:
D0000080375
10
11
12 13
10 Insulation plugs
11 Profiles for 3-way mixer
12 Insulation mat, closed
13 Adaptor with dummy cap screwed on
 Remove the insulation plugs.
 Remove the closed insulation mat and profiles for the 3-way
mixer and the heating circuit pump.
 Counterhold and unscrew the dummy caps from the
adaptors.

INSTALLATION
Installation
14 | HSBC 300 cool (AU) www.stiebel-eltron.com
HSBC3-HKM installation
1-2 Nm
D0000081576
 Check the position of the 3-way mixer shaft. Adjust the posi-
tion if necessary.
D0000085895
68
11
(*)
(*)Pipe assembly inserted
6 Insulation mat for 3-way mixer
8 Servomotor for 3-way mixer
11 Profiles for 3-way mixer
 Insert the pipe assembly.
 Insert the flat gaskets into the union nuts for the connection
pipes.
 Counterhold and secure the union nuts to the adaptors.
 Check the alignment of the pipes and functional elements of
the pump assembly. Retighten all fittings.
 Install the profiles for the 3-way mixer over the mixing valve
body and above the pump.
 Place the insulation mat for the 3-way mixer on the valve
body.
 Install the servomotor for the 3-way mixer
D0000085474
!
Material losses
To prevent condensation from forming, do not lay any
cables in the joint grooves of the EPP parts.
 Route the pump assembly connecting cable to the control
panel as shown.
 Slide the pipe insulation over the connection pipe connectors
from above.

INSTALLATION
Installation
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 15
D0000085896
9
(*)
11
(*)Pipe assembly inserted
9 Insulation mat for 3-way mixer and heating circuit pump
11 Profiles for 3-way mixer
 Insert the insulation mat on the HKM side for the 3-way
mixer and the heating circuit pump.
Electrical connection HSBC3-HKM
MA19
M
1~
XD03.2 XD03.3
MA11
L N
“+” “-”
T (MK)
(X1.6)
BT13
MKP (X2.4)
6
5
MISCHER (X2.14)
N
2
L
1
4
3
2
N
LA
LZ
L
M
1~
N
7 8 9
10
XD04
9
BK BU BNBK BU GNYE
D0000081761
 Wire up the heating circuit pump and 3-way mixer (see chap-
ter "Installation/ Electrical connection/ Control voltage").

INSTALLATION
Installation
16 | HSBC 300 cool (AU) www.stiebel-eltron.com
10.2.3 Hydraulic connection
Note
 Observe the details specified in the chapter "Installa-
tion/ Specification/ Hydraulic diagrams".
 Thoroughly flush the pipes before connecting the heat pump.
Foreign bodies (e.g. welding pearls, rust, sand, sealant, etc.)
can impair the operational reliability of the heat pump.
 Install the heating water pipes (see chapter "Specification/
Dimensions and connections").
10.3 DHW connection and safety assembly
10.3.1 Safety instructions
!
Material losses
The maximum permissible pressure must not be exceed-
ed (see chapter "Specification/ Data table").
!
Material losses
Operate the appliance only with pressure-tested taps.
!
Material losses
Install the T&P valve.
!
Material losses
The tundish and the discharge pipe should be installed
away from electrical devices.
Note
If secondary return circuits are used then an additional
expansion vessel may be required.
Cold water line
Galvanised steel, stainless steel, copper and plastic are approved
materials.
!
Material losses
A safety valve is required.
DHW line, DHW circulation line
Stainless steel, copper and plastic are approved materials.
10.3.2 Installing the DHW circulation line, if applicable
A DHW circulation line with external DHW circulation pump can
be fitted to the DHW circulation connection (see chapter "Specifi-
cation/ Dimensions and connections").
 Remove the sealing cap from the DHW circulation connection
(see chapter "Specification/ Dimensions and connections").
 Connect the DHW circulation line.
10.3.3 DHW connection and safety assembly
 Flush the pipes thoroughly.
 Install the DHW outlet line and the cold water inlet line (see
chapter "Specification/ Dimensions and connections"). Con-
nect the hydraulic connections with flat gaskets.
 Install a type-tested safety valve in the cold water inlet line.
Please note that, depending on the supply pressure, you may
also need a pressure reducing valve.
 Size the drain pipe so that water can drain off unimpeded
when the safety valve is fully opened.
 The safety valve drain aperture must remain open to
atmosphere.
 Install the safety valve drain pipe with a constant fall to the
drain.
10.4 Filling the system
Heating circuit water quality
Carry out a fill water analysis before filling the system. This analy-
sis may, for example, be requested from the relevant water supply
utility.
To avoid damage as a result of scaling, it may be necessary to
soften or desalinate the fill water. The fill water limits specified
in chapter "Specification/ Data table" must always be observed.
 Recheck these limits 8-12weeks after commissioning and
during the annual system service.
Note
With a conductivity >1000μS/cm, desalination treatment
is recommended in order to avoid corrosion.
Note
If you treat the fill water with inhibitors or additives, the
same limits apply as for desalination.
Note
Suitable appliances for water softening, as well as for
filling and flushing heating systems, can be obtained via
trade suppliers.
!
Material losses
Never switch on the power before filling the system.

INSTALLATION
Electrical connection
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 17
10.4.1 Filling the heating system
D0000080425
 Fill the heating system via the drain valve.
 Vent the pipework.
10.4.2 DHW cylinder filling
 Filling the DHW cylinder via the cold water inlet connection.
 Open all downstream draw-off valves until the appliance is
full and the pipework is free of air.
 Adjust the flow rate. For this, observe the maximum permis-
sible flow rate with a fully opened tap (see chapter "Specifi-
cation/ Data table"). If necessary reduce the flow rate at the
butterfly valve of the safety assembly.
 Carry out a tightness check.
 Check the safety valve.
10.5 Venting the appliance
D0000080451
1
2
3
1 Air vent valve
2 Vent hose
3 Hose attachment
 Detach the vent hose from the hose attachment.
 Hang the free end of the vent hose in a container.
 To ventilate, open the air vent valve.
 After ventilation, close the air vent valve.
 Secure the vent hose.
11. Electrical connection
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with relevant regulations.
Before any work on the appliance, disconnect all poles
from the power supply.
WARNING Electrocution
The connection to the power supply must be in the form
of a permanent connection. Ensure the appliance can be
separated from the power supply by an isolator that dis-
connects all poles with at least 3mm contact separation.
This requirement can be met by using contactors, circuit
breakers, fuses/MCBs, etc.
!
Material losses
Provide separate fuses for the two power circuits of the
appliance and the control unit.
!
Material losses
Observe the type plate. The specified voltage must match
the mains voltage.
Note
Leakage currents of up to 5 mA may occur.
Note
You must have permission to connect the appliance from
the relevant power supply utility.
The terminal box of the appliance is located behind the front casing
(see chapter "Preparations/ Transport and handling/ Removing/
fitting the front casing").

INSTALLATION
Electrical connection
18 | HSBC 300 cool (AU) www.stiebel-eltron.com
D0000085898
 Route all power cables and sensor leads into the appliance
through the cable entry.
 Connect the power cables and sensor leads as detailed
below.
Install cables with the following cross-sections in accordance with
the respective fuse protection:
Fuse protection Assignment Cable cross-section
B 16 A Control 1.5mm²
11.1 Control voltage
!
Material losses
 Only connect energy efficient circulation pumps ap-
proved by us to the pump connections.
D0000080432
XD03.1 Control terminal
XD03.2 Control terminal
XD03.3 Control terminal
XE03 Earth terminal, control unit
XD03.1 Control terminal
Power supply
220-240V
Mains buffer charging pump
XD03.2 Control terminal
HKP Heating circuit pump
MKP Mixer circuit pump, heating circuit 2
Note
At terminals XD03.2HKP/MKP, you can install a tempera-
ture limiter for the underfloor heating system by remov-
ing the jumper between L and 2.
XD03.3 Control terminal
Mixer Mixer, servomotor, heating circuit 2
UV Diverter valve, heating/DHW

INSTALLATION
Electrical connection
ENGLISH
www.stiebel-eltron.com HSBC 300 cool (AU) | 19
11.2 Safety extra low voltage
D0000080433
XD04 Terminal, safety extra low voltage
T(MK) Mixer circuit temperature sensor for HSBC3-HKM
(optional)
T(KUE) Temperature sensor for area cooling (optional)
T(WW) DHW temperature sensor
T(Puffer) Temperature sensor, buffer cylinder
PWM Control by WPM
Control by WPM via PWM signal
 Observe the information in the operating and installation in-
structions of the WPM heat pump manager.
11.3 Sensor installation
11.3.1 Temperature sensor for cooling (accessory), if required
Cooling requires the fitting of a temperature sensor, available as
an accessory.
 Remove the front casing (see chapter "Preparations/ Trans-
port and handling/ Removing/fitting the front casing").
D0000080426
 Insert the temperature sensor into the sensor well "Sensor
heat pump cooling, optional".
D0000080288
 Lay the sensor lead in the guide groove provided for this pur-
pose in the insulation segment.
 Connect the temperature sensor to T(KUE) of terminalXD04
of the appliance.

INSTALLATION
Commissioning
20 | HSBC 300 cool (AU) www.stiebel-eltron.com
12. Commissioning
Our customer support can assist with commissioning, which is a
chargeable service.
If the appliance is intended for commercial use, observe the rules
of the relevant Health & Safety at Work Act during commissioning.
For further details, check with your local authorising body (in
Germany, for example, this is the TÜV).
12.1 Wilo-Para .../Sc circulation pumps
LED indicators
Operation indicator:
LED illuminates green in normal operation
LED illuminates/flashes when there is a fault
Display of selected control mode
∆p-v, ∆p-c and constant speed
Display of selected curve (I, II, III) within the control
mode
Combinations of LED displays for venting function, man-
ual re-start and key lock
Operating button
Press
To select control mode
To select curve (I, II, III) within the control mode
Press and hold
To activate venting function (press for 3seconds)
For manual restart (press for 5seconds)
To lock/unlock keys (press for 8seconds)
Control modes and functions
Variable differential
pressure ∆p-v
(I, II, III)
Recommended for two-pipe heating systems with radi-
ators to reduce flow noise at thermostatic valves
The pump reduces the delivery head by a half when the
flow rate drops in pipework.
Saves energy by matching the delivery head to the flow
rate demand and the lower flow velocities.
Choice of three pre-defined curves (I, II, III).
Constant pressure
differential ∆p-c
(I, II, III)
Recommended for underfloor heating systems or with
large-diameter pipework and for all applications with
a non-varying pipework curve (e.g. cylinder charging
pumps) and single-pipe heating systems with radiators
The control system keeps the set delivery head con-
stant, irrespective of delivered flow rate.
Choice of three pre-defined curves (I, II, III).
Constant speed (I,
II, III)
Recommended for systems with unchanging system
resistance which require a constant throughput.
The pump runs at three preset fixed speed levels (I, II,
III).
Note
Factory setting:
Constant speed, curve III
Venting
Fill the system properly and ventilate it
If the pump is not ventilated automatically:
Activate the venting function via the operating button,
press button for 3seconds, then release it.
Venting function starts (duration 10minutes).
The top and bottom rows of LEDs flash alternately every
second.
To cancel, press the operating button for 3seconds.
Note
After venting, the LED indicator displays
the previously set pump values.
Setting control modes
Selecting the control
mode The LEDs for the control modes and associated curves
illuminate one after the other.
Briefly press the operating button (for approx.1sec-
ond).
LEDs indicate the current selected control mode and
curve (see following table).
Operating
button
LED indicator Control mode Curve
1x Constant speed II
2x Constant speed I
3x Variable differential pressure
∆p-v
III
4x Variable differential pressure
∆p-v
II
5x Variable differential pressure
∆p-v
I
6x Constant differential pressure
∆p-c
III
7x Constant differential pressure
∆p-c
II
8x Constant differential pressure
∆p-c
I
*9x Constant speed III
(*)Pressing the button for the 9thtime in succession returns the
system to the factory setting (constant speed, curveIII).
II
III
I
H/m
Q/m³/
h
III
I
II
H/m
Q/m³/
h
I
III
II
H/m
Q/m³/
h
sec3
min10