oventrop Regudis W-HTE User manual

Regudis W-HTE
Produktabbildung
Operating instructions
EN

Page
Regudis W-HTE
Contents
1. General information ............................................................................................................7
1.1 Validity of the instructions...................................................................................................................... 7
1.2 Type plate............................................................................................................................................... 7
1.3 Scope of delivery .................................................................................................................................... 7
1.4 Contact................................................................................................................................................... 7
1.5 Symbols used.......................................................................................................................................... 7
2. Safety-related information ..................................................................................................7
2.1 Normative directives............................................................................................................................... 7
2.2 Intended use........................................................................................................................................... 7
2.3 Modifications to the product................................................................................................................... 8
2.4 Warnings ................................................................................................................................................ 8
2.5 Safety devices......................................................................................................................................... 8
2.5.1 Automatic closing mechanism for the control valve.................................................................................... 8
2.6 Safety notes............................................................................................................................................ 8
2.6.1 Danger due to insufficient personnel qualification ...................................................................................... 8
2.6.2 Danger to life due to electric current............................................................................................................ 9
2.6.3 Danger to life due to legionella formation.................................................................................................... 9
2.6.4 Risk of scalding due to hot water ................................................................................................................. 9
2.6.5 Risk of injury from pressurised components................................................................................................ 9
2.6.6 Risk of burns due to unintentionally escaping hot media ............................................................................ 9
2.6.7 Risk of burns on hot components and surfaces ........................................................................................... 9
2.6.8 Risk of injury due to weight of the product .................................................................................................. 9
2.6.9 Risk of injury from improper work................................................................................................................ 9
2.6.10 Damage to property due to unsuitable location........................................................................................... 9
2.6.11 Availability of the operating instructions ....................................................................................................10
3. Technical description .........................................................................................................11
3.1 Design ................................................................................................................................................... 11
3.2 Functional description ........................................................................................................................... 11
3.3 System example with cabinet ................................................................................................................12
3.4 Actuator with integrated potable water temperature control.................................................................13
3.4.1 Service mode...............................................................................................................................................13
3.5 Installation scheme................................................................................................................................13
3.6 Technical data........................................................................................................................................15
4. Accessories and spare parts .............................................................................................. 18
4.1 Accessories............................................................................................................................................18
4.2 Spare parts ............................................................................................................................................18
4.3 Ball valve connection set....................................................................................................................... 20
4.4 Ball valve connection set with Flypass connection fitting ..................................................................... 20
4.5 Ball valve connection set for the potable water circulation module....................................................... 20
4.6 Potable water circulation module...........................................................................................................21
4.7 Derivative temperature control set ........................................................................................................21
4.8 Flow temperature control module (only for surface heating systems) .................................................. 22
4.9 Heating circuit connection fittings........................................................................................................ 22
4.10 Stainless steel spacer............................................................................................................................ 22
4.11 Front insulation shell ............................................................................................................................ 22
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Contents
5. Transport and storage ....................................................................................................... 22
6. Installation........................................................................................................................ 23
6.1 Notes on mounting............................................................................................................................... 23
6.2 Mounting options ................................................................................................................................. 23
6.3 Mounting of the station and accessories in a cabinet ............................................................................ 23
6.3.1 Mounting of the cabinet ............................................................................................................................. 23
6.3.2 Mounting of the ball valve connection set.................................................................................................. 24
6.3.3 Mounting of heating circuit connection fittings for an additional direct heating circuit............................ 24
6.3.4 Mounting of the station.............................................................................................................................. 24
6.3.5 Mounting of the flow temperature control module.................................................................................... 25
6.4 Wall attachment of the station ............................................................................................................. 25
6.4.1 Wall attachment of the station................................................................................................................... 26
6.5 Mounting of the heat meter .................................................................................................................. 27
6.6 Mounting of the water meter ................................................................................................................ 28
6.7 Mounting of the potable water circulation module (optional) ............................................................... 29
6.8 Mounting of the derivative temperature control set (optional) ............................................................. 30
6.9 Electrical connection of the station........................................................................................................31
6.9.1 Connection of equipotential bonding..........................................................................................................31
6.9.2 Electrical connection of the actuators and of the pump for the surface heating system (if available) .......31
6.9.3 Electrical connection of the circulation pump (if available)........................................................................ 32
6.9.4 Electrical connection of the station............................................................................................................ 32
7. Commissioning ................................................................................................................. 32
7.1 Filling and venting of the heating circuit ............................................................................................... 32
7.2 Filling of the potable water circuit......................................................................................................... 33
7.3 Venting of the circulation pipe (if available) .......................................................................................... 34
7.4 Setting of the ball valves and valves for operation ................................................................................ 34
7.5 Setting of the hot water temperature.................................................................................................... 35
7.5.1 Sliding hot water temperature control ....................................................................................................... 36
7.6 Setting of the derivative temperature control set (if available).............................................................. 36
7.7 Setting of the heating circuit temperature (if a flow temperature control module is available) ............. 37
7.8 Teach-in of the actuator........................................................................................................................ 37
7.9 Instruction of the operator.................................................................................................................... 37
8. Troubleshooting................................................................................................................38
8.1 Troubleshooting table........................................................................................................................... 38
8.2 Status messages and error messages ................................................................................................... 38
8.2.1 Status messages......................................................................................................................................... 39
8.2.2 Error messages........................................................................................................................................... 39
8.2.3 Fail-safe mode ............................................................................................................................................ 39
8.2.4 Error reset................................................................................................................................................... 39
8.3 Calcification of the heat exchanger....................................................................................................... 39
8.3.1 Detection of a calcification.........................................................................................................................40
8.3.2 Removal and cleaning of the heat exchanger.............................................................................................40
8.4 Inspection and cleaning of the volume flow sensor............................................................................... 41
8.4.1 Inspection of the flow sensor ..................................................................................................................... 41
8.4.2 Cleaning of the volume flow sensor........................................................................................................... 41
8.5 Cleaning of the filter insert ................................................................................................................... 43
9. Maintenance .....................................................................................................................43
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Contents
9.1 Functional test of the check valve of the potable water circulation module ..........................................44
9.2 Leakage test (visual inspection)............................................................................................................44
9.3 Inspection of the electrical components and plug-in connections.........................................................44
9.4 Performance test of the heat exchanger ............................................................................................... 45
10. Advice for the operator .....................................................................................................46
10.1 Setting of the hot water temperature....................................................................................................46
10.2 Legionella prevention ...........................................................................................................................46
11. Removal and disposal........................................................................................................47
11.1 Removal................................................................................................................................................ 47
11.1.1 Disconnection of the station from the power supply................................................................................. 47
11.1.2 Removal of the station ............................................................................................................................... 47
11.2 Disposal................................................................................................................................................48
12. Appendix ..........................................................................................................................48
12.1 Characteristic line for heating mode .....................................................................................................48
12.2 Characteristic lines for potable water mode.......................................................................................... 49
12.3 Characteristic lines for performance range 1..........................................................................................51
12.4 Characteristic lines for performance range 2 ........................................................................................ 54
12.5 Characteristic lines for performance range 3 ........................................................................................ 58
12.6 Advice regarding corrosion protection.................................................................................................. 62
12.7 EU Declaration of conformity................................................................................................................ 64
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Regudis W-HTE
General information
1. General information
The original operating instructions are written in German.
The operating instructions in other languages have been
translated from German.
1.1 Validity of the instructions
These instructions are valid for the Regudis W-HTE
dwelling station.
Performance range 
Heat exchanger copper
brazed Item no. 
Heat exchanger copper
brazed,
Sealix® protective layer
Item no. 
Performance range 
Heat exchanger copper
brazed Item no.
Heat exchanger copper
brazed,
Sealix® protective layer
Item no. 
Performance range 
Heat exchanger copper
brazed Item no. 
Heat exchanger copper
brazed,
Sealix® protective layer
Item no. 
1.2 Type plate
The type plate (1) is located at the top left hand side of the
rear insulation shell.
1
Fig. 1: Position of the type plate
1Type plate
1.3 Scope of delivery
Check your delivery for transport damage and
completeness.
The scope of delivery includes:
• Regudis W-HTE dwelling station
• Operating instructions
• Fixing material
• Seal set
1.4 Contact
OVENTROP GmbH & Co. KG
Paul-Oventrop-Straße 1
59939 Olsberg
GERMANY
www.oventrop.com
Technical service
Phone: [phone]
1.5 Symbols used
Highlights important information and further
additions.
fAction required
• List


Fixed order. Steps  to X.
ZResult of action
2. Safety-related information
2.1 Normative directives
Observe the legal framework conditions applicable at the
installation site.
The currently valid standards, rules and guidelines apply.
2.2 Intended use
Operational safety is only guaranteed if the product is
used as intended.The station is an electronically
controlled product assembly with heat exchanger for use
in domestic areas (e.g. rental units in residential, business
and commercial buildings).The product assembly provides
heated potable water (hot water) within a residential unit
and distributes the heating water (max. 90 °C). Only use
the product as intended:
• In technically perfect condition.
• Within the scope of the prescribed conditions of use.
• When all safety devices are fully functional.
• Following all instructions.
• Safety- and hazard-conscious.
At locations directly connected to the public low-voltage
grid.
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Safety-related information
Any use beyond and/or different from this is considered
improper use.
Claims of any kind against the manufacturer and/or his
authorised representatives for damage resulting from
improper use cannot be recognised.
Proper use also includes correct compliance with these
instructions.
2.3 Modifications to the product
Modifications to the product are not permitted. In case of
modifications to the product, the warranty will become
void.The manufacturer will not accept liability for damage
and breakdowns caused by modifications to the product.
2.4 Warnings
Each warning contains the following elements:
Warning symbo
SIGNAL WORD
Type and source of danger
Possible consequences if the danger occurs or the
warning is ignored.
!
Ways to avoid the danger.
Signal words define the severity of the danger posed by a
situation.
DANGER
Indicates an imminent danger with high risk. If the
situation is not avoided, death or most serious bodily
injuries will result.
WARNING
Indicates a possible danger with moderate risk. If the
situation is not avoided, death or serious bodily injuries
may result.
CAUTION
Indicates a possible danger with lower risk. If the
situation is not avoided, minor and reversible bodily
injuries will result.
NOTICE
Indicates a situation that can potentially result in damage
to property if not avoided.
2.5 Safety devices
2.5.1 Automatic closing mechanism for the
control valve
Fig. 2: Control valve closes in case of power failure
If the power supply is interrupted (230 V failure), then the
control valve closes permanently to completely cut off the
heating water supply to the heat exchanger.This excludes
the possibility of uncontrolled heating of the potable
water.
2.6 Safety notes
We have developed this product in accordance with
current safety requirements.
Please observe the following notes concerning safe use.
2.6.1 Danger due to insufficient personnel
qualification
Work on this product may only be carried out by suitably
qualified specialist tradespeople.
Due to their professional training and experience as well
as knowledge of the relevant legal regulations, qualified
specialist tradespeople are able to carry out work on the
described product in a professional manner.
Specialist electricians
The following work may only be carried out by specialist
electricians:
• Connection of the product to the power supply.
Due to their professional training and experience as well
as knowledge of the relevant standards, specialist
electricians are able to carry out work on electrical
installations and connections. He must be able to
recognise possible dangers independently.
Specialist sanitary, heating and air-conditioning
tradespeople
The following work may only be carried out by specialist
sanitary, heating and air-conditioning tradespeople:
• Installation
• Commissioning
• Troubleshooting
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Safety-related information
• Maintenance
• Removal and disposal
Due to their professional training and experience as well
as knowledge of the relevant standards, specialist sanitary,
heating and air-conditioning tradespeople are able to carry
out work on heating, cooling and potable water
installations.They must be able to recognise possible
dangers independently.
Operator
The following work may be carried out by the operator:
• Operation of the product
The operator must be instructed in the operation of the
product by specialist tradespeople.
2.6.2 Danger to life due to electric current
Work on the power supply may only be carried out by a
specialist electrician. Opening the connection box is only
necessary for installing accessories.
!
Disconnect the station from the power supply at
all poles and secure it against being switched on
again.
!
Check that no voltage is present.
!
Only install the product in dry indoor areas.
2.6.3 Danger to life due to legionella
formation
!
Ensure the following:
• The temperature of the potable water in the cold
water pipe must not exceed 25 °C.
• The water in the potable water circuit must be
completely replaced after 72 hours at the latest.
• When using the potable water circulation module, the
hot water temperature must be at least 60 °C.The
temperature difference between the hot water outlet
of the heat exchanger and the return of the circulation
pipe at the station must not exceed 5°C.
Observe the relevant regulations (e.g. DVGW
worksheet W).
2.6.4 Risk of scalding due to hot water
Due to adjustment or defect of the actuator, the hot water
temperature at the draw-off points can rise up to the
heating water temperature in the buffer storage cylinder.
!
If there is a risk of scalding in accordance with
DIN EN 806 and DIN 1988 due to high heating
water temperature in the buffer storage cylinder,
you must install scald protection at all draw-off
points.
!
If the heating water temperature in the buffer
storage cylinder is low, resulting in a low hot
water temperature without risk of scalding
at the draw-off points,you must instruct the
system operator to ensure the low heating water
temperature in the buffer storage cylinder all year
round.
2.6.5 Risk of injury from pressurised
components
!
Only carry out work on the heating circuit or
the potable water circuit when the system is
depressurised.
!
Adhere to the permissible operating pressures
during operation.
!
Install a safety valve that cannot be shut off in
the potable water heating installation (regulation
according to DIN EN 806-2).
2.6.6 Risk of burns due to unintentionally
escaping hot media
!
Only carry out work on the heating circuit or
the potable water circuit when the system is
depressurised.
!
Allow the product to cool down before working
on it.
!
Check that the product is not leaking after work
is complete.
!
Wear safety goggles.
2.6.7 Risk of burns on hot components and
surfaces
!
Allow the product to cool down before working
on it.
!
Wear suitable protective clothing to avoid
unprotected contact with hot fittings and plant
components.
2.6.8 Risk of injury due to weight of the
product
!
Always wear safety shoes during installation.
2.6.9 Risk of injury from improper work
Stored energy, angular components, points and corners on
and in the product can cause injuries.
!
Ensure there is sufficient space before starting
work.
!
Handle open or hard-edged components with
care.
!
Keep the working area tidy and clean to avoid
sources of accidents.
2.6.10 Damage to property due to unsuitable
location
!
Do not install the product in rooms prone to
frost.
!
Do not install the product in rooms with
corrosion-enhancing ambient air.
!
Observe the notes on corrosion protection in the
appendix.
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Regudis W-HTE
Safety-related information
2.6.11 Availability of the operating instructions
Every person who works with this product must have read
and apply this manual and all applicable instructions (e.g.
accessories instructions).
The instructions must be available at the place of use of
the product.
!
Pass on these instructions and all applicable
instructions (e.g.accessories instructions) to the
operator.
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Technical description
3. Technical description
3.1 Design
1
10
23
4
5
6
7
89
10
11
12
13
14
15
16
17 18 19
Fig. 3: Overview of the Regudis W-HTE dwelling station
1Type plate
2Angled wall bracket
3Thermally insulated rear insulation shell
4Connection for the circulation pipe
5Volume flow sensor
6Spacer for water meter
7Drain valve in the primary circuit
8Connection for the derivative temperature control
set
9Filter insert in the primary supply
10 Connection in the primary supply for the
temperature sensor of the heat meter
11 Spacer for heat meter
12 Zone valve for heating circuit control
13 Hot water temperature sensor
14 Heat exchanger
15 Control valve with integrated differential pressure
and volume flow control
16 Vent valve in the heating circuit
17 Actuator with integrated potable water temperature
control
18 Rotary knob
19 Connection box for the power supply
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Technical description
3.2 Functional description
The Regudis W-HTE station is an electronically controlled
product assembly intended for use in domestic areas.The
product assembly provides heated potable water (hot
water) within a residential unit and distributes the heating
water (max. 90°C) to radiators.With an optional flow
temperature control module, heating water distribution to
a surface heating system (e.g. underfloor heating) is also
possible.
The decentralised hot water preparation of the station
makes the storage of hot potable water unnecessary.
In the heat exchanger (14), potable water is heated
according to the continuous flow principle only when it is
needed.The demand for hot water is detected by the
volume flow sensor (5).
The setpoint temperature for the hot water is adjusted
with the rotary knob (18) on the actuator (17). During
operation, the temperature sensor continuously measures
the temperature of the hot water at the hot water outlet of
the heat exchanger. The temperature sensor forwards this
information to the electronic control.
The information from the volume flow sensor and the
temperature sensor is passed on to the actuator by the
electronic control.
The actuator opens and closes the control valve (15).
Depending on the position of the control valve, more or
less hot heating water flows from the primary supply into
the heat exchanger as required.
In addition, the control valve keeps the necessary
differential pressure in the system constant.
The heat output transferred to the potable water depends
on the heating water quantity and the heating water
temperature supplied to the heat exchanger.
The control valve features a potable water priority function
ensuring the supply of the required hot water quantity
even in heating mode.
Optionally, an actuator can be mounted on the zone valve
(12).This offers you the possibility to close the zone valve
time-controlled.
The Regudis W-HTE dwelling station is available in
different performance ranges.The performance ranges
differ in the size of the heat exchanger (see charts in the
appendix).
2345
Fig. 4: Heating mode
14567
1
4567
Fig. 5: Hot water mode
1Hot water outlet
2Heating circuit return
3Heating circuit supply
4Primary supply from the buffer storage cylinder
5Primary return to the buffer storage cylinder
6Cold water outlet
7Cold water inlet from the house connection
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Technical description
3.3 System example with cabinet
2
1
3
4
5
6
7
8
9
10
Fig. 6: System example with cabinet, potable water
circulation and surface heating
1Connecting block for room thermostats and
actuators
2Station
3Potable water circulation module
4Ball valve connection set
5Distributor/collector for the surface heating system
6Actuator for the surface heating system
7Flow temperature control module for the surface
heating system
8Derivative temperature control set
9Zone valve (can optionally be equipped with an
actuator)
10 Actuator with integrated potable water temperature
control
3.4 Actuator with integrated potable
water temperature control
12 3
5678 4
Fig. 7: Actuator with integrated potable water
temperature control
1Two-pole plug (power supply)
2Three-pole socket (volume flow sensor)
3Two-pole socket (hot water temperature sensor)
4Indicator light (LED)
5Error reset index (only for specialist tradespeople)
6Service mode index
(only for specialist tradespeople)
7Rotary knob for hot water temperature,
error reset and service mode
8Temperature scale for hot water temperature in°C
(here:°C, factory setting)
Make sure the polarity is correct (the plugs are
coded).
3.4.1 Service mode
The actuator is closed on delivery.
If you set the rotary knob to the service mode index (6) for
longer than 5 seconds, the actuator opens the control
valve completely.
The service mode facilitates the removal of the actuator
and can be helpful during commissioning to vent the
primary circuit.
The control valve remains completely open until you turn
the rotary knob back to the desired hot water temperature
(< 70 °C).
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Technical description
3.5 Installation scheme
2
7
6
3
2
1
12
13
14
2
4
5
8
9
10
11
1
Fig. 8: Installation scheme: dwelling station
1Radiator (heating circuit)
2Dwelling station
3Ball valves
4Surface heating (heating circuit)
5Flow temperature control module for the surface
heating system
6Primary return
7Primary supply
8Cold water inlet
9Pump group
10 Buffer storage cylinder
11 Heat generator
12 Circulation circuit
13 Hot water
14 Cold water
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Technical description
3.6 Technical data
General information
Max. operating pressure ps bar
Max. operating
temperature ts°C
Ambient temperature T  to °C
Empty weight
Performance range :
. kg
Performance range :
. kg
Performance range :
. kg
Electrical connection: Power pack
Mains input voltage  to  V AC ±%
Mains input frequency  to Hz
Output voltage  V DC +.%, -%
Rated output current max. mA
Protection category:
Connection box IP
Protection class II
Overvoltage category III
Ambient temperature  to °C
Electrical connection: Actuator
Input voltage  V DC +.%, -%
Power consumption . to  W
Protection category IP
Ambient temperature  to °C
Dimensions
Width x Height x Depth  x  x mm
Connections G¾ union nut,
flat sealing
Centre distance between
the connections  mm
Centre distance to the wall . mm
Primary circuit (buffer storage cylinder)
Fluid
Heating water according
to VDI/Ö-Norm H
- (Austrian
standard, fluid category ≤
 according to EN ,
(see Oventrop information
sheet on corrosion
protection in the
appendix)
Min. differential pressure  mbar
Max. differential pressure .bar
Min. flow temperature See charts in the
appendix.
Heating circuit (radiators)
Fluid As in the primary circuit.
Max. volume flow  l/h
Differential pressure
control  mbar
Potable water circuit
Fluid
Potable water (see
Oventrop information
sheet on corrosion
protection in the
appendix).
NOTICE
Damage to the
insertion turbine due
to chemical influences!
Additives for water
treatment in high
concentrations can
damage the insertion
turbine.
!
Ensure that the
permissible limits
for potable water
are not exceeded.
Min. cold water pressure See charts in the
appendix.
Setting range  to  ˚C
Max. hot water
volume flow
See charts in the
appendix.
Material
Heat exchanger copper
brazed
Plates:
Stainless steel .
Connections:
Stainless steel .
Brazing material: Copper
Heat exchanger copper
brazed,
Sealix®-protective layer
Plate material:
Stainless steel .
Connections:
Stainless steel .
Brazing material: Copper
Protective layer: SiO
basis
Pipes Stainless steel .
Valves and fittings Brass and bronze
Temperature sensor Stainless steel .
Volume flow sensor Brass and plastic
Spacers for meters Plastic
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Technical description
Seals EPDM and fibre materials
Thermal insulation Expanded polypropylene
Torques
Union nuts G¾  Nm
Union nuts G  Nm
Spacers for meters(()
and () in Fig.  on page
)
 Nm
Temperature sensor(()
in Fig.  on page )  Nm
Volume flow sensor(() in
Fig.  on page )  Nm
Filter insert(() in Fig.  on
page )  Nm
Drain valve(() in Fig.  on
page )  Nm
Vent valve (() in Fig. 
on page )  Nm
110
26.526.5171 6565 65 65 65 65
130 340 130
600
400
455
Fig. 9: Dimensions
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Regudis W-HTE
Technical description
567
4
3
2
1
Fig. 10: Connection assignment
1Hot water outlet
2Heating circuit return
3Heating circuit supply
4Primary supply from the buffer storage
cylinder
5Primary return to the buffer storage cylinder
6Cold water outlet
7Cold water inlet from the house connection
Black Hot water
Grey Cold water
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Accessories and spare parts
4. Accessories and spare parts
4.1 Accessories
Designation Item no.
Ball valve connection set 
Ball valve connection set
with Flypass connection
fitting

Ball valve connection set
for the potable water
circulation module

Potable water circulation
module 
Derivative temperature
control set 
Flow temperature control
module 
Heating circuit connection
fittings 
Stainless steel spacer 
Flush-mounted cabinet



Surface-mounted cabinet



Heating circuit plug 
Front insulation shell 
Regubox exclusive
surface-mounted bonnet 
Connecting block for
room thermostats and
actuators with pump logic
e. g. 
Distributor/collector e. g. 
Actuator e. g. 
4.2 Spare parts
Designation Item no.
Heat exchanger
copper brazed
Performance
range  
Performance
range  
Performance
range  
Heat exchanger
copper brazed,
Sealix®-
protective layer
Performance
range  
Performance
range  
Performance
range  
Actuator with integrated potable
water temperature control 
Temperature sensor 
Volume flow sensor in a housing 
Hall effect sensor for volume flow
sensor 
Insertion turbine for volume flow
sensor 
Filter insert 
Control valve with integrated
differential pressure and volume
flow control

Sealing rings ( pieces for
junctions G¾) 
Sealing rings ( pieces for
junctions G) 
Power pack  -  V,
~ -  Hz 
18 134403082-V09.03.2022

Regudis W-HTE
Accessories and spare parts
12
3
4
5
67
8
Fig. 11: Spare parts
1Actuator with integrated potable water temperature
control
2Power pack  -  V, ~ -  Hz
(in connection box)
3Volume flow sensor in a housing
4Sealing rings ( pieces for junctions G¾)
5Sealing rings ( pieces for junctions G)
6Temperature sensor
7Heat exchanger
8Control valve with integrated differential pressure
and volume flow control
19134403082-V09.03.2022

Regudis W-HTE
Accessories and spare parts
4.3 Ball valve connection set
Fig. 12: Ball valve connection set
The ball valve connection set (item-no.1344480) consists
of ball valves for shutting off all connections of the station,
which are pre-assembled in a bracket for a precise fit.
4.4 Ball valve connection set with
Flypass connection fitting
Fig. 13: Ball valve connection set with Flypass
connection fitting
The ball valve connection set with Flypass connection
fitting (item no.1344485) consists of ball valves for
shutting off all connections of the station and for flushing
the supply pipe,which are pre-assembled in a bracket for a
precise fit.
4.5 Ball valve connection set for the
potable water circulation module
Fig. 14: Ball valve connection set for the potable
water circulation module
The ball valve connection set for the potable water
circulation module (item-no.1344484) consists of a ball
valve for shutting off the circulation pipe,which is pre-
assembled in a bracket for a precise fit.
4.6 Potable water circulation module
Fig. 15: Potable water circulation module
The potable water circulation module (item-no.1344555)
provides hot water immediately, time-controlled, even at
distant draw-off points.
Legal requirements such as the Potable Water
Ordinance and DVGW worksheet W require
large systems to be equipped with a circulation
pipe if there is more than  litres of water volume
in the pipework between the potable water heater
and at least one draw-off point.
4.7 Derivative temperature control set
Fig. 16: Derivative temperature control set
The derivative temperature control set (item no. 1344490)
is used to quickly provide hot potable water outside the
heating mode by means of a thermostatically adjustable
heating bypass.
20 134403082-V09.03.2022