alphainnoTec BWP 303+S User manual

We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
HEAT PUMP
Operating Manual
DOMESTIC HOT WATER
UK
BWP 307+S
BWP 303+S

2We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Please read rst
This operating manual provides important information
on handling the unit. It is an integral part of the product
and must be stored so that it is accessible in the
immediate vicinity of the unit. It must remain available
throughout the entire service life of the unit. It must be
handed over to subsequent owners or users of the unit.
Read the operating manual before working on or
operating the unit. This applies in particular to the
chapter on safety. Always follow all instructions
completely and without restrictions.
It is possible that this operating manual may contain
instructions that seem incomprehensible or unclear. In
the event of any questions or if any details are unclear,
contact the factory customer service department or the
manufacturer’s local partner.
As this operating manual possibly has been written
for several different models, always comply with the
parameters for the respective model.
This operating manual is intended only for persons
assigned to work on or with the unit. Treat all constituent
parts condentially. The information contained herein is
protected by copyright. No part of this manual may be
reproduced, transmitted, copied, stored in electronic
data systems or translated into another language,
either wholly or in part, without the express written
permission of the manufacturer.
Symbols
The following symbols are used in the operating manual.
They have the following meaning:
Information for users.
Information or instructions for qualied
personnel.
DANGER!
Indicates a direct impending danger
resulting in severe injuries or death.
WARNING!
Indicates a potentially dangerous situation
that could result in serious injuries or
death.
CAUTION!
Indicates a potentially dangerous situation
that could result in medium or slight
injuries.
ATTENTION
Indicates a potentially dangerous situation, which
could result in property damage.
NOTE.
Emphasized information.
€ENERGY SAVING TIP
Indicates suggestions that help to save energy,
raw materials and costs.
Reference to other sections of the operating
manual.
Reference to other documents of the
manufacturer.

3
Contents
INFORMATION FOR USERS AND QUALIFIED
PERSONNEL
PLEASE READ FIRST..................................................................2
SYMBOLS .....................................................................................2
INTENDED USE..........................................................................4
DISCLAIMER................................................................................4
EC CONFORMITY .....................................................................4
SAFETY.........................................................................................4
AREA OF USE..............................................................................5
CARE OF THE UNIT..................................................................5
MALFUNCTIONS.......................................................................6
CUSTOMER SERVICE ................................................................6
WARRANTY / GUARANTEE ....................................................6
DISPOSAL ....................................................................................6
DESCRIPTION OF UNIT ..........................................................6
The unit ..................................................................................6
How it works.........................................................................6
Functional Princible ..............................................................7
INSTRUCTIONS FOR QUALIFIED PERSONNEL
SCOPE OF DELIVERY......................................................8
INSTALLATION AND ASSEMBLY...........................................8
COMMISSIONING ...................................................................14
MAINTENANCE OF THE UNIT.............................................14
REMOVING AND ATTACHING THESCREEN ..................17
ACCESS TO THE COOLING CIRCUIT................................18
OPERATION
BWP 307+S - THE CONTROL UNIT....................................20
Operation.............................................................................20
USER MENU .......................................................................20
OPERATING MENU...........................................................21
Setpoints...............................................................................25
DEFROST TABLE................................................................26
FUNCTION ...............................................................................26
POWER ................................................................................26
WATER HEATING..............................................................26
FAN MODE..........................................................................26
DEFROSTING .....................................................................27
ADDITIONAL CAPACITY................................................27
OPERATING SAFETY........................................................27
HIGH-PRESSURE LIMITER ...............................................27
ALARM .................................................................................27
BUILT-IN SAFETY DEVICES...................................................27
SAFETY TEMPERATURE LIMITERS FOR THE HEATING
CARTRIDGE..................................................................27
TROUBLESHOOTING.............................................................28
INSTRUCTIONS FOR QUALIFIED PERSONNEL
TECHNICAL DATA / SCOPE OF DELIVERY..............30
FREE PRESSURE / AIR FLOW RATE.......................................31
BWP 303+S / BWP 307+S..................................................31
DIMENSIONED DRAWING...................................................32
BWP 307+S ...............................................................................32
BWP 303+S.................................................................................33
INSTALLATION PLAN BWP 307+S / BWP 303+S .............34
COOLING CIRCUIT................................................................35
Hydraulic diagram...............................................................36
Integration with external solar system...........................37
Integration with second heat generator .........................38
APPENDIX
OVERVIEW OF THE SET VALUES.........................................41
EC DECLARATION OF CONFORMITY............................. 44
CUSTOMER SERVICE ..............................................................46
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH

4We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Intended use
The unit may be used only for the intended purpose.
This means:
•for domestic water heating.
The unit may be operated only within its technical
parameters.
“Technical data / scope of delivery“.
Disclaimer
The manufacturer is not liable for losses resulting from
any use of the unit which is not its intended use.
The manufacturer’s liability also expires:
•if work is carried out on the unit and its
components contrary to the instructions in this
operating manual.
•if work is improperly carried out on the unit and
its components,
•if work is carried out on the unit which is not
described in this operating manual, and this
work has not been explicitly approved by the
manufacturer in writing.
•if the unit or components in the unit have been
altered, modied or removed without the explicit
written consent of the manufacturer.
EC conformity
The unit bears the CE mark of conformity.
“EC declaration of conformity”.
Safety
The unit is safe to operate for its intended use. The
construction and design of the unit conform to current
state of the art standards, all relevant DIN/VDE
regulations and all relevant safety regulations.
Every person who performs work on the unit must
have read and understood the operating manual prior
to starting any work. This also applies if the respective
person has already worked with such a unit or a similar
unit or has been trained by the manufacturer.
Every person who performs work on the unit must
comply with the applicable accident prevention and
safety regulations. This applies in particular to the
wearing of personal protective equipment.
ATTENTION
Only install the heating pump indoors.
Maintain minimum clearances.
“Dimensioned drawings” and “installation plan”.
ATTENTION
Store unit in packaging and upright, not lled
with water.
Transport unit in packaging and not lled with
water.
Ambient temperature for storage and transport:
-10 °C to +50 °C.
ATTENTION
Do not tilt the unit more than a maximum of 45°
(in any direction).
The unit can be substantially damaged if tilted by
more than 45°!
ATTENTION
Do not drill holes in the shell of the unit (i.e. for
ttings). This could damage the unit to the point
of making it unserviceable.

5
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
DANGER!
Risk of fatal electric shock!
Electrical connection work must be
carried out by qualied electricians only.
– Before working on the unit, disconnect the
power supply, disconnect the unit from
the power supply (unplug!) and secure
against being switched back on again.
Note that the fan may continue to turn
even after the unit has been switched off.
DANGER!
During installation and while carrying out
electrical work, comply with the relevant
EN-, VDE and/or local safety regulations.
DANGER!
Qualied trained personnel only (qualied
heating, cooling system, refrigeration
or refrigerant technician or electrician)
may carry out work on the unit and its
components.
WARNING!
Unit contains refrigerants! Qualied
service personnel must ensure that prior
to maintenance or repairs of parts that
circulate refrigerant, the refrigerant must
be removed to the extent necessary for
carrying out the work safely.
Leaking refrigerant could result in personal
injury or environmental damage. Therefore:
– Switch off system,
– Notify the manufacturer’s authorised
service centre.
WARNING!
Use only water that is suitable for drinking
in accordance with the drinking water
ordinance.
Ensure that all drinking water connections
comply with the local regulations.
Use only suitable materials for the entire
domestic water circuit.
In case of excessive water pressure, install
a suitable pressure reduction valve in the
cold water supply pipe.
Area of use
Taking into account the ambient conditions, use limits
and the relevant regulations, the pump can be used in
new or existing domestic hot water systems.
“Technical data / Scope of delivery”.
Care of the unit
You can clean the outer surfaces of the unit with a damp
cloth and proprietary household cleaning products.
Do not use cleaning or care products that contain
abrasives, acids and/or chlorine. Such products would
destroy the surfaces and could also damage the technical
components of the unit.

6We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Malfunctions
Malfunctions are indicated by the controller on the unit.
DANGER!
Only customer service personnel
authorised by the manufacturer may carry
out service and repair work on the unit’s
components.
“Customer service”.
Note that no malfunction is displayed if the safety
temperature limiter on the electric heating element has
tripped.
“Installed safety devices”, “Safety temperature
limiter” section.
Customer service
For technical information please contact your local
heating engineer or the manufacturer’s local partner.
“Customer service”.
Warranty / Guarantee
For warranty and guarantee conditions, please refer to
the purchase documents.
NOTE:
Please contact your dealer about all matters con-
cerning warranties and guarantees.
Disposal
If taking the old unit out of service, comply with the
relevant local laws, guidelines, directives and standards
for the recovery, reuse, recycling and disposal of
resources and components of cooling units.
“Dismantling”.
Description of unit
TheuniT
The BWP is a ready-to-connect, domestic water heat
pump. It consists of the housing, the components of
the refrigerant, air and water circuit and all control and
monitoring devices required for automatic operation.
The BWP uses the heat of the extract air to heat
domestic water. During peak load period, extra power
is supplied by an integrated electric heating element of
1.5 kW.
A thermowell is installed in the storage tank, which can
be used for an external storage tank thermostat or a
sensor (diameter 6 mm) of an external control.
The area of application and functional principle of the
heat pump is specied in the operating manual.
howiTworks
The control unit starts the compressor shortly after
hot water has been used. The compressor carries on
running until the whole tank has once again been heated
to the set temperature. In general the BWP can produce
enough hot water to cover the requirements of a
4-person household (user dependent).
If the situation arises that the BWP cannot produce
enough hot water, an electric heating element installed
in the storage tank can be switched on. This enables
more domestic water to be heated. It is possible to set
the required temperature, to which the electric heating
element is to heat the domestic water. Only use the
electric heating element if it is needed, because the
electric heating element consumes more energy than
the compressor. The electric heating element must be
switched on manually at the control.
“Technical data/scope of delivery”.

7
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
FuncTionalPrincible
ThereFriGeranTcircuiT-DescriPTion
The cooling system is used to optimise the heat in the
extracted air. In this way the recovered heat is transfer-
red to the water. This process is only possible by exter-
nal supply of energy into the compressor.
The refrigerant circuit is a closed system, in which the
HCFC-free refrigerant R134a functions as an energy car-
rier.
In the evaporator, heat is extracted from the air at a low
evaporating temperature and is transferred to the refri-
gerant. The vaporous refrigerant is drawn in by a com-
pressor, is compressed to a higher pressure and tempe-
rature level and is transported to the liqueer, which is
attached to the outside of the storage tank. Here the
heat absorbed in the evaporator and part of the absor-
bed compressor energy are transferred to the domestic
hot water.
The high condensing pressure is then relaxed by means
of an expansion device (expansion valve) to the evapora-
tion pressure, and the refrigerant in the evaporator can
then once again absorb heat from the exhaust air
“Cooling circuit”.
ThewaTercircuiT-DescriPTion
The water circuit is set up in compliance with the rele-
vant standards and requirements.
Only water of drinking quality (according to the drinking
water regulations) may be used. Ensure material compa-
tibility in the whole water circuit. A suitable pressure re-
ducer must be used if the water pressures are too high.
waTercircuiTreQuireMenTs
The nominal diameters of the pipes for on site installa-
tion are to be dened on site, taking into account the
available water pressure and the expected pressure los-
ses in the pipe system. The water side installation must
be according to DIN 1988. The water pipes can be xed
or exible pipes.
Attention must be paid to the corrosivity of the mate-
rials used in the pipe system to avoid damage. This re-
quires particular attention if zinc coated components
containing copper are used.
As with all pressure vessels, the domestic hot water tank
of the water pump must be equipped with a type-tested
safety valve and a non-return valve (on site).
The cold water pipe inlet is at the rear, near the oor
(3/4” RG). The maximum operating pressure is 10 bar;
the maximum operating temperature is 65° C. If neces-
sary, a drinking water lter and a pressure reducing valve
should be installed in the supply pipe.
We recommend checking the water connection sockets
for dirt.
Avoid getting dirt in the pipe system when laying the pi-
ping on site (if necessary, ush the pipes before connec-
ting the heat pump)!
If a circulation pipe is not connected to the heat pump
the connection must be appropriately sealed!
DeFrosTinG(bwP307+sonly)
If the temperature difference between the cooling
surface temperature upstream of the cooling surface
and the cooling surface temperature becomes too large,
which happens if ice has formed on the cooling surface,
the system begins to defrost (see diagram). Solenoid
valve MA 4 opens, the exhaust air fans switch off until
the ice has melted and the cooling surface has reached
a temperature of approx. 5°C (depends on the setting),
after which the solenoid valve closes again and the
exhaust air fan restarts.
“Cooling circuit”.
Incidentally:
Your decision to purchase a domestic hot water heat
pump is a long-term contribution to protecting the
environment through low emissions and reduced primary
energy use.
€ENERGY SAVING TIP
Do not set the domestic hot water temperature
higher than necessary. The unit operates
most efciently at low domestic hot water
temperatures (≈ 45°C).
Switch on the electric heating element only if it is
actually needed. Switching on the electric heating
element increases the power consumption of
the unit.

8We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Scope of delivery
Compact unit with
•integrated domestic hot water tank,
•integrated controller, including control unit with
LCD display,
•operating manual.
Complete the following rst:
Check the delivery for outwardly visible signs of
damage…
Check to make sure that the delivery is complete.
Report defects or incorrect deliveries immediately.
NOTE.
On delivery, always check the (2) tilt indicators
attached to the packaging rst!
If either of the tilt indicators is red, this indicates
improper transport (unit was tilted more than
45°) and acceptance of the unit can be refused.
Installation and assembly
The following applies to all work to be done:
NOTE.
Always comply with applicable accident pre-
vention regulations, statutory regulations, ordi-
nances and directives.
NOTE.
Observe the sound levels of the respective mo-
del.
“Technical data / scope of delivery”, “Sound”
section.
insTallaTionlocaTion
ATTENTION
Install the unit only inside buildings in a frost-
free area.
The installation room must be frost-free and dry. It must
full the requirements of EN 378. It must also full the
regulations which apply locally.
Further requirements:
•Room temperature or air intake temperature:
BWP 303+S 8°C to 35°C
BWP 307+S -5°C to 35°C
•no excessive dust,
•rm, load-bearing oor (≈ 500 kg/m² per unit),
•socket outlet with earthing contact (230V/ 50Hz),
•cold / domestic hot water connection,
•wastewater connection for condensate discharge
•In recirculation mode:
volume of installation room ≥ 20 m
“Dimensioned drawings” and “installation plan”.

9
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
TransPorTToinsTallaTionlocaTion
Always comply with the following safety information
during transport:
DANGER!
Several people are required to transport
the unit. Do not underestimate the weight
of the unit.
“Technical data / Scope of delivery”, “General
unit data” section.
DANGER!
Danger of tipping over during transport!
This can result in personal injury and
damage to the unit.
– Take suitable precautions to prevent
the risk of tipping over.
ATTENTION
Never use components and hydraulic connec-
tions on the unit for transport purposes.
The top part of the unit (upper sheet metal ja-
cket) is not suitable for lifting.
ATTENTION
Do not damage the hydraulic connections under
any circumstances.
ATTENTION
Do not tilt the unit more than a maximum of 45°
(in any direction).
The unit can be substantially damaged if tilted by
more than 45°.
To avoid damage during transport, you should transport
the unit to its nal installation location in its original
packaging (on the wooden pallet) using a forklift or pallet
truck.
If it is not possible to transport the unit to its nal
installation location using a forklift or pallet truck, you
can also transport the heat pump using a hand truck.
TransPorTwiThahanDTruck
Proceed as follows:
Push hand truck under the unit and transport carefully
to installation location.
ATTENTION
Transport unit with the hand truck only on the
corresponding transport pallet. This also applies
to carrying up and down steps.
Tilting heights
(minimum dimensions in mm) BWP 307+S BWP 303+S
with transport pallet 2080 2100
without transport pallet 1960 2000
Moving dimensions (minimum dimensions in mm)
with transport pallet 1977x820 2000x820

10 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Pull lower part of the pallet away while the unit is
kept supported at an inclined angle of < 45°…
Slowly and carefully tip the unit back onto the oor.
Tilt unit slightly backward in order to pull out the
front board from under the bottom of the unit.
Remove the rear board in the same manner.
Place unit at nal installation location. Compensate
for minor unevenness using the four adjusting
screws on the bottom of the unit.
ATTENTION
Maintain minimum clearances in order to ensure
correct air inlet and air outlet, in addition to ac-
cess to the unit for servicing.
“Installation plan”.
reMovaloFTheuniTFroMTheTransPorTPalleT
Proceed as follows:
Place pallet with the unit on a level, at and solid
surface.
Remove packaging, transport ttings and all screw
connections from the pallet boards.
Slide unit carefully on the loosened boards to one
side of the pallet.
DANGER!
Work with several people present. Do not
underestimate the weight of the unit.
DANGER!
Danger of tipping over!
– Provide sufcient support for the side
of the unit tilting forward.
CAUTION!
Hands and ngers could be crushed during
the following tasks!

11
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
insTallaTion/connecTionToThe
DoMesTicwaTercircuiT
DANGER!
Risk of fatal electric shock!
Before working on the unit, disconnect the
power supply, disconnect the unit from the
power supply (unplug!) and secure against
being switched back on again. Note that
the fan may continue to turn even after
the unit has been switched off.
Connect the domestic hot water tank according to
DIN1988 and DIN 4753, Part 1 (or the applicable local
standards, guidelines and directives).
ATTENTION
Connect the unit to the hot water circuit accor-
ding to the hydraulic diagram.
“Hydraulic diagram”.
NOTE.
The installation must be sufciently dimensioned
in connection with the existing water pressure
and the expected pressure loss, in order to en-
sure sufcient water pressure and a sufcient
water supply to the tap.
Do not exceed the operating pressures specied on the
rating plate.
Install a pressure reduction valve and a water lter in the
supply pipe, if necessary.
ATTENTION
When installing the connections, always secure
the connections on the unit from twisting, in or-
der to prevent damage to the copper pipes in
the interior of the unit.
Flush water circuit thoroughly before connecting
the unit.
NOTE:
Contamination and deposits in the water circuit
can cause malfunctions.
Install domestic hot water connection to the upper
connection at the rear of the unit…
1 Connection for domestic
hot water connection
2 Connection for circulation
pipe connection
3 Connection for heat
exchanger connection
4 Connection for cold
water connection
“Dimensioned drawings”.
ATTENTION
Do not remove the plastic grommets in all the
domestic water connections.
Install connection for return circulation pipe on the
middle connection at the rear of the unit…
NOTE:
If the system is operated without hot water cir-
culation, close the middle connecting pipe on
the unit.
Mount supply pipe for cold water on the lower
connecting pipe on the rear of the unit.

12 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
conDensaTeDischarGe
The condensation water that accumulates from the
air during operation of the unit must be drained in
accordance with the local standards and guidelines. For
this purpose, connect the connection on the outside of
the unit with a water drain.
1 Condensate outlet = connection
for condensate hose (next to
domestic hot water connection
at the rear of the unit)
NOTE:
Use a reinforced water hose with 3⁄4
”
diameter
(not included).
Do not use a textile hose (risk of kinking)!
Install the water hose, using a hose strap to form
a secure and tight seal at the condensate socket of
the unit…
Feed the water hose into the sewer system via the
funnel trap.
NOTE.
The funnel trap acts as an odour trap and must
have a water column ≥100 mm.
ATTENTION
Failure to install the condensate hose or incor-
rect installation can result in water damage in
the installation room or damage to the unit.
airinleTanDairouTleT
ATTENTION
Do not close or cover the air inlet and air outlet
openings at the top of the unit.
Ensure the minimum clearances.
“Installation plan” BWP 303+S
1 Air intake openings
(rear of the unit)
2 Air outlet openings
(front of the unit)
“Installation plan” BWP 307+S
1 Air intake openings
(rear of the unit)
2 Air outlet openings
(front of the unit)

13
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
insTallaTionoFairDucTs-bwP307+sonly
ATTENTION
The ambient and supply air must not contain any
aggressive substances (ammonia, sulphur, chlo-
rine or similar) or excessive dust or grease
Example:
1 Exhaust air (air delivery side)
2 Extract air (air intake opening)
3 Extract air (air intake opening)
4 Extract air (air intake opening)
NOTE
In exhaust air mode, ensure that sufcient fresh
air can ow into the respective exhaust air
spaces at all times.
Grille cover (KDUL) available as accessory (BWP 307+S
only) for use of the unit with recirculating air:
NOTE.
Installation of the grille cover (BWP 307+S only)
increases the total height of the unit by 9 mm to
1946 mm.
ATTENTION
The ambient and supply air must not contain any
aggressive substances (ammonia, chlorine or si-
milar), or excessive dust or grease.

14 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Then the version number of the control software appears
briey on the screen, before the screen switches to the
default display, which shows the current temperature of
the water in the hot water tank.
Maintenance of the unit
DANGER!
Risk of fatal electric shock! All electrical
connections must be carried out by
qualied electricians only.
– Before working on the unit, disconnect
the power supply, disconnect the unit
from the power supply (unplug!) and
secure against being switched back on
again. Note that the fan may continue
to turn even after the unit has been
switched off.
ATTENTION
After the initial installation and at intervals of se-
veral days, conduct a visual inspection for any
leaks in the domestic water circuit. Check regu-
larly to ensure that the condensate drain is not
blocked.
DoMesTicwaTercircuiTanD
DoMesTichoTwaTerTank
saFeTyvalve
ATTENTION
Ensure that the safety valve is in working order.
Inspect the safety valve several times each year
to ensure that it is functioning properly and re-
place, if necessary.
NOTE.
The manufacturer will assume no liability for da-
mage resulting from a defective or inoperable sa-
fety valve.
Commissioning
DoMesTichoTwaTercircuiT
Open cold water inlet and ll the unit’s domestic
hot water tank.
Open the highest domestic hot water tap in
the house or apartment and leave open under
supervision until no more air escapes from the tap,
and only water ows out…
Check the domestic hot water circuit for leaks, as
soon as the domestic hot water tank is completely
lled.
elecTricalconnecTions
The unit is wired ready for connection at the time of
delivery. Plug the unit’s power plug into a socket outlet
with earthing contact.
coolinGcircuiT
The unit’s cooling circuit is ready for operation at
the time of delivery. No work may be performed on
the cooling circuit. The unit’s electronic control unit
automatically controls all functions related to operation
of the compressor and the fan.
You only have to set the required domestic hot water
temperature (factory setting: 50 °C).
“Operation”.
€ENERGY SAVING TIP
Do not set the domestic hot water temperature
higher than necessary. The unit operates most ef-
ciently at low domestic hot water temperatures
(≈ 45 °C).
swiTchinGonTheuniT
When the unit is supplied with electricity (by plugging in
the power plug), the display lights up and counts upward
5 seconds.

15
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83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
sacriFicialanoDe/sensorPockeT
To prevent corrosion of the especially enamelled
domestic hot water tank, it is equipped with a magnesium
anode, which has been installed in the domestic hot
water tank with a 11⁄4” pipe plug.
1 Anode at front of unit
(view with screen removed)
2 Sensor pocket in the ange
cover of the service opening
NOTE.
In the ange cover of the domestic hot water
tank’s service opening there is a sensor pocket,
which is provided for an external boiler thermo-
stat or for a sensor (for example, for an external
solar controller) with maximum 6 mm diameter.
ATTENTION
Ensure that the anode is always intact.
Check the anode every year and it is essential
to replace if it is corroded and has a diameter of
only 6 – 10 mm.
The anode can be checked with a suitable measuring
instrument (multimeter). If the testing current is < 1 mA,
it is essential to replace the anode. In this case, the hot
water tank must be drained down to the level of the
anode.
If you have not yet done so, remove the screen at
the front of the unit…
“Removing and attaching the screen”.
Shut off cold water supply…
Screw hose onto the drain valve of the unit and lay
up to the sewer system…
Open the drain valve at the unit and (to prevent
negative pressure in the domestic hot water tank)
open a domestic hot water tap in the domestic
water circuit…
After emptying the domestic hot water tank, close
the drain valve and the domestic hot water tap…
Remove anode from the unit and inspect. Replace, if
necessary…
Insert inspected or new anode in the unit and screw
in…
Open cold water inlet and ll the unit’s domestic
hot water tank…
Open the highest domestic hot water tap in
the house or apartment and leave open under
supervision until no more air escapes from the tap,
and only water ows out…
If no further work is to be done, attach the screen
back onto the front of the unit.
“Removing and attaching the screen”.

16 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
coMPonenTsoFThecoolinGcircuiT
Remove screen, plastic cover and upper sheet metal
jacket from unit, in order to access the components
of the cooling circuit…
After completing work on the components of the
cooling circuit, re-attach the screen, plastic cover
and the upper sheet metal jacket onto the unit.
“Removing and mounting the screen” and
“Access to the cooling circuit”.
evaPoraTor
The maintenance work is limited to cleaning the
evaporator periodically or as needed.
CAUTION!
Risk of injury due to sharp-edged ns.
ATTENTION
Do not damage ns.
Check to ensure that the ns of the evaporator are
clean. Clean ns if necessary…
Fan
Clean the fan periodically or as needed, using a brush or
bottle cleaner, etc.
ATTENTION
Ensure that the balancing weights on the fan
wheel are not removed, as this could cause un-
balance and therefore increased noise and wear
of the fan.
conDensaTechannelanDDrain
Inspect condensate channel and drain to ensure that
they are clean.
Proceed as follows:
Pour water into the condensate channel and check
whether it drains freely…
If the water does not drain freely, clean the
condensate drain.
cleaninGTheDoMesTichoTwaTerTank
The domestic hot water tank should be cleaned once
each year by qualied personnel (heating or cooling
system technicians).
Follow the instructions – in the preceding
section…
After completely emptying the domestic hot water
tank, close the domestic hot water tap and unscrew
the ange cover of the service opening…
1 Flange cover of service opening
Clean the domestic hot water tank…
Close the drain valve and screw the ange cover
onto the service opening…
Follow the instructions – in the preceding
section.

17
We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Insert the screen from above into the grooves
provided at the front of the unit and allow it to
snap into place by lightly knocking with your open
hand on both sides and continuously from top to
bottom…
ATTENTION
Do not use any striking tools (hammer).
Once the screen is tted correctly in the grooves,
tighten the screws.
Removing and attaching
thescreen
reMovinGThescreen
Undo the retaining screws of the screen…
From above, carefully pull the screen downwards
and out of the groove on the left and right and set
aside in a safe place.
aTTachinGThescreen
NOTE.
Ensure that the wiring is attached in such
a way that it cannot be pinched by the
screen.

18 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
ATTENTION
When releasing the controller unit from the
grooves of the upper sheet metal jacket, ensure
you do not damage any cable connections (e.g.
by pulling).
1 Upper sheet metal jacket
2 Plastic ring
3 Controller unit
1 Plastic cover
2 Upper sheet metal jacket
3 Plastic ring
4 Controller unit (tilted downwards)
Lift upper sheet metal jacket together with the
plastic cover completely off the unit and set aside.
The components of the cooling circuit, the fan and
the condensate channel are now accessible.
Access to the cooling circuit
reMovinGThePlasTiccoveranD
uPPersheeTMeTaljackeT
DANGER!
Risk of fatal electric shock! All electrical
connections must be carried out by
qualied electricians only.
– Before working on the unit, disconnect
the power supply, disconnect the unit
from the power supply (unplug!) and
secure against being switched back on
again. Note that the fan may continue
to turn even after the unit has been
switched off.
If you have not yet done so, remove the screen at the
front of the unit…
“Removing and attaching the screen”.
Proceed as follows:
Undo the retaining screws of the plastic ring at the
front of unit…
Lift upper sheet metal jacket together with the
plastic cover upward and out of the groove of the
plastic ring, while at the same time, turning it slightly
(bayonet fastening) Carefully remove the controller
unit from the grooves of the sheet metal jacket and
then tilt downward…

19
We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Dismantling the unit
DANGER!
Risk of fatal electric shock! All electrical
connections must be carried out by
qualied electricians only.
–Before dismantling the unit, disconnect
the power supply, disconnect the unit
from the power supply (unplug the
unit!).
DANGER!
Only qualied heating or cooling system
personnel are allowed to remove the unit
from the system.
ATTENTION
Recycle or ensure proper disposal of unit com-
ponents, refrigerants and oil according to the re-
levant regulations, standards and guidelines.
Before removing the unit, shut off the cold water supply
and completely empty the domestic hot water tank.
“Maintenance of the unit”, “Domestic water
circuit and domestic hot water tank”, “Sacricial
anode”, instructions – .
aTTachinGThePlasTiccoveranD
uPPersheeTMeTaljackeT
Lift the upper sheet metal jacket together with the
plastic cover above the unit and lower carefully, Fit
them into the groove of the plastic ring…
1 Plastic cover
2 Upper sheet metal jacket
3 Plastic ring
4 Controller unit (tilted downwards)
ATTENTION
Ensure you do not damage any cable
connections.
Tilt controller unit up and t upper sheet metal
jacket into the grooves of the controller unit. To
do so, again lift the upper sheet metal jacket slightly
and then t it into the required position…
Insert the retaining screws of the plastic ring in the
front of the unit and screw tight, x the upper sheet
metal jacket in the bayonet fastening with a slight
turning movement.
Attach screen back onto the front of the unit.
“Removing and attaching the screen”.

20 We reserve the right to modify technical specications without prior notice.
83025000bUK – translation of the operating manual © Alpha-InnoTec GmbH
Operation
The unit is delivered from the factory with default
settings (= factory settings). It can be started up with no
further conguration.
The factory settings are basic settings, which you
can adapt to individual preferences and operating
requirements, to optimise operation and maximise
efciency.
BWP 307+S - the control unit
oPeraTion
userMenu
The value of the corresponding menu item is shown if
the button/button combination listed in the following is
pressed.
The value can be changed using the arrow buttons whilst
at the same time keeping the button/button combination
pressed.
P1:level
(If the “Level” button is kept pressed the setting can be
changed using the arrow buttons). This button can be
used to switch the function between: standby, automatic
operation, continuous operation and timer-controlled
continuous operation (Level 0, 1, 2, 3).
• Level 0: The heat pump is deactivated. Only the control
is activated. The heat pump is not activated if there is a
heat requirement.
• Level 1: The fan is only activated to heat the domestic
water. The required fan speed can be set from 0-100 %
in menu item E25.
• Level 2: The fan runs even if the compressor is switched
off. This function is also called: continuous air extraction
in the home.
The required fan speed can be set from 0-100 % in menu
item E25.
• Level 3: The fan runs during a selected period, even
if the compressor is switched off, before it returns to
normal operation.
The required fan speed can be set from 0-100 % in menu
item E26.
Menu item E17 is used to select whether “Level 3” is
to be continued until the next manual change (E17=0)
or whether “Level 3” is to be used for a specic period
(E17=1 and E18: 0-10 hours), and then returns to “Level
2”.
Setting option: 0-3
Factory setting: 1
P2:conTroluniToFTheheaTinGcarTriDGe 
(If the “Heating cartridge” button is kept pressed, the
setting can be changed using the arrow buttons.) The
heat pump is supplied with a heating cartridge for heating
domestic water. If the outdoor temperature is below 0
°C it is advantageous to use the heating cartridge to heat
domestic water.
1 = the heating cartridge is switched on as and when
necessary (see setpoint P5).
0 = the electric cartridge is not switched on, even when
needed.
Setting option: 0-1
Factory setting: 0
P3:oPeraTinGTherMosTaT 
(If the “Operating thermostat” button is kept pressed
the setting can be changed using the arrow buttons.)
The domestic water is heated by the heat pump.
The compressor starts if the T8 temperature (tank,
bottom) is less than setpoint P3 minus 5 °C, and stops
again when the T8 temperature equals the setpoint P3.
Setting option: 0-55 °C
Factory setting: 52 °C