Rehau RE.GUARD User manual

RE.GUARD WATER CONTROL DEVICE
Installation and operating instructions

These ‘RE.GUARD Water Control Device’ installation and operating
instructions are valid from July 2020.
With its publication the previous Technical Information 410600 (dated
December 2019) becomes invalid.
Our current technical documents can be downloaded from
www.rehau.com/ti or via the QR code.
This document is protected by copyright. Any rights conferred therein,
in particular those relating to the translation, reprinting, extraction of
illustrations, electronic transmissions, reproduction by photomechanical or
similar means and storage on data processing systems, are reserved.
All dimensions and weights are reference values. Subject to technical
changes.

CONTENTS
1 Information and safety instructions 6
1.1 On this documentation 6
1.2 Intended use 6
1.3 Safety instructions 7
2 Product description 8
2.1 Operating principle 8
2.2 Range of application 9
2.3 Controls and indicators 10
2.4 Accessories 10
2.4.1 RE.HUB gateway 10
2.4.2 RE.GUARD water sensor 11
2.4.3 Other accessories 11
2.5 RE.GUARD water control device technical data 12
3 Installation 14
3.1 Delivery contents 14
3.2 Transport and storage 14
3.3 Networking components 15
3.3.1 Networking prior to installation 15
3.3.2 Z-Wave®– fundamentals 15
3.4 Connecting to the plumbing system 16
3.4.1 General requirements 16
3.4.2 Installation-side requirements 16
3.4.3 Permissible installation positions 18
3.4.4 Installing the RE.GUARD water control device 20
3.5 Rotate the top of the housing 25
3.6 Power supply 27
3.6.1 Connect to the mains supply 27
3.6.2 Backup power 28
3.7 Commissioning 28

4 Operating modes 29
4.1 Commissioning mode 29
4.2 Standard mode 30
4.3 ‘Present’ and ‘absent’ modes 30
4.4 Custom mode 31
4.5 Deactivation 31
5 Operation 32
5.1 Operation and status indicators on the device 32
5.1.1 Pairing device with Z-Wave (including/adding) 33
5.1.2 Unpairing device from Z-Wave (exclusion) 34
5.1.3 Closing/opening the valve manually 35
5.1.4 Acknowledging a burst pipe (macro leak) 35
5.1.5 Acknowledging drip leak (micro leak) 36
5.1.6 Acknowledging detected water spillage (via optional RE.GUARD water sensor) 37
5.1.7 Activating/deactivating custom mode 38
5.1.8 Deactivation 39
5.1.9 Reactivation 40
5.1.10 Resetting the device to factory settings 41
5.2 Operation using the RE.GUARD app 42
5.2.1 Screens and navigation 44
5.2.2 Adjusting thresholds 45
5.2.3 Switching modes 45
5.2.4 Specifying the time of the drip leak check 45
6 Servicing 47
6.1 Inspection and maintenance 47
6.2 Inserting/changing emergency batteries 47
6.3 Updates 51
6.4 Care 51
6.5 Spare parts 52
6.6 Disposal 52
7 Malfunctions 53
7.1 Notifications 53
7.2 Corrective measures 55
7.3 Emergency release (emergency open function) 58

8 Z-wave®: relevant data 61
8.1 Associations 61
8.2 Notifications 62
8.3 Konfigurationsparameter Z-Wave®63
8.4 Command classes 66
Appendix 67
Table of Threshold Values 67

1 INFORMATION AND SAFETY
INSTRUCTIONS
1.1 On this documentation
- Please read these instructions carefully before
installing or operating the RE.GUARD water
control device.
- Keep the instructions safe and on hand at the
installation site.
- Pass these instructions on to subsequent users.
Scope
These installation instructions are valid for
Germany.
Pictograms and logos
The following pictograms and logos are used in
these instructions:
Safety notice
Legal notice
Important information
Validity of the instructions
To ensure your own safety and the correct use
of our products, please check at regular intervals
whether a newer version of these instructions is
available. The issue date of these instructions is
printed on the bottom right-hand side of the back
page.
You can view and download the most recent
instructions as well as further instructions at
www.rehau.com/ti.
1.2 Intended use
The RE.GUARD water control device may only
be installed and operated as described in these
instructions. Compliance with these instructions
is part of intended use.
Installation and maintenance may only be
carried out by qualified and trained personnel.
This means personnel who, through training
and experience, are permitted and capable
of carrying out the relevant installation work,
identifying and avoiding potential hazards as
well as observing relevant applicable regulations
(e.g. regulations regarding work safety, electrical
safety etc.)
6

1.3 Safety instructions
- Failure to follow these instructions can result
in damage or injury.
We accept no liability for damage caused by
non-compliance with these instructions.
- If you have not understood the safety
instructions or individual operating steps or they
are unclear, please contact REHAU. The contact
details for your region or country can be found
on the back cover page.
Accident prevention
Observe all applicable national and international
regulations relating to installation, prevention of
accidents and safety warnings when installing
pipe systems and components of drinking water
installations, as well as the information in these
instructions.
Laws, standards and regulations
Please observe the currently valid laws,
standards, instructions, regulations (e.g. DIN,
EN, ISO, DVGW, NEN, VDE and VDI) as well as
regulations regarding environmental protection,
trade association regulations and regulations
from local utility companies.
Electrical safety
Work on electrical systems may only be carried
out by personnel trained and authorised to do
so. There is a risk of electric shock in the case of
unauthorised and improper work.
7

2 PRODUCT DESCRIPTION
2.1 Operating principle
Fig. 2-1 RE.GUARD water control device
The RE.GUARD water control device is a device
to install in the drinking water supply pipe, which
permanently monitors the flow rate, pressure and
temperature of the drinking water system with
built-in sensors at the place of installation. If the
predefined threshold values are exceeded, the
RE.GUARD water control device isolates the pipe
work with an integrated, motorised ball valve,
displays a warning message and transmits it
wirelessly.
Fundamentally it is only possible to protect the
downstream part of the installation after the
RE.GUARD.
The sensors are suitable for detecting the
following leaks at an early stage:
- Larger leaks in the water pipes,
e.g. a burst pipe, hereinafter also referred to as
macro leaks.
- Very small water leaks,
e.g. a drip leaks, hereinafter also referred to as
micro leaks.
The RE.GUARD water control device’s leak
prevention function does not oer complete
protection against water damage and does not
prevent the occurrence of leaks itself. However,
through correctly setting the parameters and
thresholds, based on the respective appliances
and number of people in the building, leaks can
be detected at an early stage, thereby reducing
the likelihood of a larger water damage and
minimizing any follow-up costs.
8

For the reliable detection of leaks,
in particular for the detection of
micro leaks, all installed check valves (after
the domestic water meter, after the branch
o for any water treatment, on any taps
and/or any appliances) must work
correctly. Ensure their correct function
through regular maintenance.
Expansion vessels installed in the drinking
water system, e.g. in the supply to the
boiler, can cover up any micro leaks
and therefore reduce the likelihood of
detection.
2.2 Range of application
The RE.GUARD water control device is suitable
for use in drinking water installations within
buildings. It is designed for detached and
semi-detached houses as well as individual
apartments.
The correct function of the device during
operation is generally ensured at ambient
temperatures of 5°C to 40°C and for short
periods in exceptional cases between 0 °C and
50 °C. The device must always be kept frostfree.
Installation is carried out in a horizontal or
vertical orientation in consideration of the flow
direction and exclusively in cold water pipes with
a temperature of between 5°C and 25°C. It is
preferable to install the RE.GUARD water control
device in the incoming mains pipe section,
but always after the pressure reducer. When
installing the RE.GUARD water control device
before the pressure reducer, false detections of
micro leaks are possible.
Installing the device in hot water
pipes, circulation pipes and all
non-drinking water pipes is prohibited.
The water pressure (static pressure) at the place
of installation must be at least 0.2MPa (2bar)
and maximum 1.0 MPa (10 bar). If the network
pressure is higher than 1.0 MPa (10 bar), the
RE.GUARD water control device must only be
operated downstream after a pressure reducer
which is set at maximum 1.0 MPa (10 bar).
The place of installation must be dry and free of
frost. Exposing the device to direct sunlight is to
be avoided.
If any disinfection measures or
chemical dosing of the drinking
water is present (e.g. hardness
stabilisation) or any water softeners or
demineralisation devices are installed that
also reach the installation location of the
RE.GUARD water control device, a
consultation must be held with the
manufacturer of the device or substance
and with REHAU.
9

2.3 Controls and indicators
Fig. 2-2 Controls and indicators
Burst pipe button (macro leaks)
Drip leak button (micro leaks)
Wireless connection button (pairing)
Shut-o button (valve open/closed)
All-round light ring
The basic functions of the device are accessed
using four buttons. The buttons also serve as
display indicators and signal a change within the
control or monitoring area with colour changes
(see Chapter “5.1 Operation and status indicators
on the device”, page32).
An all-round light ring shows the overall status of
the RE.GUARD water control device.
Extended functionality including adjusting the
thresholds, setting notifications, schedules
and other actions can be accessed through
the RE.GUARD app and are only possible in
combination with the RE.HUB Gateway (see
Chapter “5.2 Operation using the RE.GUARD
app”, page42).
2.4 Accessories
The following accessories are optional and
are not included in the delivery contents of the
RE.GUARD water control device.
2.4.1 RE.HUB gateway
Fig. 2-3 RE.HUB gateway
The RE.HUB gateway is required for accessing
all extended functions of the RE.GUARD water
control device (changing the thresholds, setting
the parameters, integrating it into a Z-wave®
network, pairing additional Z-wave®components,
remote controlling, recording and accessing
historical data, etc.) which can be accessed via
the RE.GUARD app (Android Version 7 and above
and iOS Version 11 and above).
Other Z-wave®gateways or similar smart home
systems with Z-wave®functionality can be
used as an alternative to the RE.HUB gateway.
However, in this case, advanced knowledge of
wireless standards, smart home etc. is necessary,
operation via the RE.GUARD app is not possible
and REHAU cannot accept any liability regarding
the overall functionality. If you have any questions
regarding integration and pairing, please contact
the manufacturer of the respective device.
10

2.4.2 RE.GUARD water sensor
Fig. 2-4 RE.GUARD water sensor
The RE.GUARD water sensor can be used to
detect and report escaping water even faster.
It also measures the ambient temperature and
provides frost warnings.
Areas that can be additionally covered with the
RE.GUARD water sensor include, for example,
household appliances and sanitary fixtures (under
the bathtub, dishwasher, washing machine etc.)
Up to 10 RE.GUARD water sensors can be linked
to a RE.GUARD water control device.
Other Z-wave®floor sensors or other sensors
with Z-wave®functionality can be used as an
alternative to the RE.GUARD water sensor.
In this case, however, integration and display
via the RE.GUARD app is not possible. If you
have any questions regarding integration and
pairing, please contact the manufacturer of the
respective device.
2.4.3 Other accessories
The Z-Wave ®wireless standard transmits at
a frequency of 868.42MHz and has a range
of up to 30m within buildings. The range is
significantly reduced by heavy and solid building
parts, especially by ceilings with a lot of steel
reinforcement and by solid walls.
If the radio signal between the RE.HUB Gateway
and RE.GUARD water control device is not strong
enough, any network-connected Z-Wave®device
can be used as a repeater, but the ‘AEOTEC
Range Extender 6’ was specifically tested.
However, please note the additional “3
Installation”, page14 as well as the fact that
in the event of a defect or other failure of the
Z-Wave®device serving as a repeater, the radio
connection between the RE.GUARD components
may also be impaired.
11

2.5 RE.GUARD water control device technical data
Dimensions
Length of casing (excluding thread connections) b 141 mm
Total length of device (including thread connections) l 190 mm
Height of bottom edge– thread axis h1 76 mm
Height of top edge– thread axis h2 113 mm
Total height h1 + h2 189 mm
Width t 77 mm
h1 h2
b
l
t
12

Product features
Dimensions and connections
Nominal diameter DN 20
Screw connections G1" external thread as per ISO 228 (flat-sealing)
Spanner size SW27
Materials
Base body Lead-free gunmetal as per DIN specification 2701
Casing Acrylonitrile styrene acrylate copolymer (ASA)
Control panel Plexiglas (PMMA– polymethyl methacrylate)
Flow rate/pressure loss (with built-in ball valve and sensors)
Nominal flow rate 2.5 m³/h
Pressure loss at nominal flow rate 10.5kPa (105mbar)
Maximum flow rate 5.0 m³/h
Pressure loss at maximum flow rate 36.0kPa (360mbar)
Flow rate coefficient CV8.3m³/h
Nominal pressure level PN16
Maximum operating pressure 1 MPa (10 bar)
Operating temperatures
Drinking water temperature in use 5°C–25°C
Ambient temperature
Short-term in exceptional case
5 °C–40 °C
0 °C–50 °C (frost-free)
Noise characteristics incl. ball and sensors Fitting class I as per DIN EN 13828
Electrical data
Electrical connection 110 – 230 V / 50 – 60 Hz
Mains adapter voltage 12 V DC
Power consumption (in use) 10 W
Protection rating IP 44
Protection class Water control device III
Mains adapter II
Length of connecting cable Approx. 1.2m
Emergency power supply batteries 1) 4 x AA
Weight (without mains adapter) 1545g
Wireless protocol/radio frequency Z-wave®Plus/868.42MHz
Approval compliant with DIN 3553 (issue 03-2019)
1) not included in the delivery contents
13

3 INSTALLATION
3.1 Delivery contents
The following components are included in the
delivery contents of the RE.GUARD water control
device:
Fig. 3-1 RE.GUARD water control device
Fig. 3-2 Mains adapter
Fig. 3-3 Installation and operating instructions (short version)
Fig. 3-4 Safety instructions
3.2 Transport and storage
The RE.GUARD water control device is delivered
in transport packaging which oers good but
not complete protection from environmental
influences.
Always transport and store the RE.GUARD
water control device in this closed packaging
and only remove the device immediately before
installation.
During transport and storage, the device must
not be exposed to frost or reach temperatures
above 50°C.
RE.GUARD
* Des solutions polymères à l’infini
*
RE.GUARD
DE Sicherheitshinweise
EN Safety warnings
FR Consignes de sécurité
IT Indicazioni di sicurezza
ES Indicaciones de seguridad
NL Veiligheidsaanwijzingen
RU Указания по б езопасности
CZ Bezpečnostní pokyny
UA Вказівки з техніки безпеки
RO Indicaţii de securitate
SK Bezpečnostné upozornenia
PL Zalecenia bezpieczeńst wa
RS Bezbednosne napomene
HR Sigurnosne napomene
BA Sigurnosne napomene
GR Υποδείξεις ασφαλείας
HU Biztonsági utasítások
MK Безбедносни напомени
AL Udhëzimet e sigurisë
BG Указания за безопасно ст
* Des solutions polymères à l’infini
**
14

3.3 Networking components
3.3.1 Networking prior to installation
The initial networking process between the
RE.GUARD water control device and the RE.HUB
gateway requires a high level of data exchange
and a highly stable wireless connection. Even
minor interference in the wireless connection can
lead to the termination of the initial networking
process.
We therefore strongly advise to carry out
networking in close proximity to each other prior
to installing the RE.GUARD into the plumbing
system. Alternatively, the RE.HUB gateway can
also be placed in the immediate vicinity of an
already installed RE.GUARD water control device
(e.g., by means of a longer LAN cable, closer
LAN connection or Powerline network adapters).
Initial networking via a Z-Wave-based repeater is
not possible.
3.3.2 Z-Wave®– fundamentals
The following conditions ensure the
best possible wireless connection:
- Do not install the devices in any cabinets
- Min. 50cm distance from
- Metal objects
- Walls and ceilings with metal
reinforcement (e.g. basement ceilings)
- Cables
- Other wireless sources
The RE.HUB gateway (accessory) is required
for accessing the extended functionality of the
RE.GUARD water control device (changing the
thresholds, setting the parameters, integrating
it into a Z-wave®network, pairing additional
Z-wave®components, remote controlling,
recording and accessing historical data etc.)
through the RE.GUARD app. The RE.GUARD app
runs on smartphones with Android (version 7 and
higher) and iOS (version 11 and higher).
The integration (pairing) of the RE.GUARD water
control device is described in Chapter “5.1.1
Pairing device with Z-Wave (including/adding)“,
page33.
The RE.GUARD gateway set-up is described in
the section “Setting up the RE.GUARD app“,
page42.
Communication between the RE.GUARD water
control device and the RE.HUB gateway as
well as between the external components (e.g.
RE.GUARD water sensor) occurs via the open
wireless standard Z-wave®.
The wireless standard transmits at a frequency
of 868.42MHz and has a range of up to 30m
within buildings. This range is significantly
reduced by solid components, particularly
ceilings with a very high steel reinforcement and
solid walls.
Other Z-wave®gateways or similar smart home
centres with Z-wave®functionality can be
used as an alternative to the RE.HUB gateway.
However, in this case, advanced knowledge
of wireless standards, smart home etc. is
necessary, operation via the RE.GUARD app
is not possible and REHAU cannot accept any
liability regarding the overall functionality. If you
have any questions regarding integration and
coupling, please contact the manufacturer of the
respective device with regards to this.
15

3.4 Connecting to the plumbing system
3.4.1 General requirements
The installation of the RE.GUARD
water control device is a significant
modification to the drinking water
installation. According to most national
regulations, such modifications may only
be carried out by an installation company
registered in the plumbing directory of the
water supply company. Please find out
about these national regulations before
installation.
Please observe the notes in
Chapter“1 Information and safety
instructions”, page6.
3.4.2 Installation-side requirements
Installation of the device is not
permitted in:
- Hot water pipes
- Circulation pipes
- Non-drinking water systems
Before installing the RE.GUARD water control
device, check that the dimensions of the drinking
water installation are sucient.
It is recommended to install the RE.GUARD water
control device in the drinking water installation
immediately after the domestic water meter, i.e.
directly after the isolation valve with check valve,
right behind the water meter, however behind
an optionally installed pressure reducer. When
installing the RE.GUARD water control device
before the pressure reducer, false detections of
micro leaks are possible.
The following conditions must be
fulfilled:
- The mains pressure must not exceed
1.0MPa (10bar). In the case of higher
mains pressure, the RE.GUARD water
control device should only be installed
after a pressure reducer, which is set to
a maximum of 1.0MPa (10bar).
- If drinking water consumers are installed
on the property, which may under
no circumstances be shut o by the
RE.GUARD water control device, the pipe
works must be branched o beforehand.
These might be:
- Any type of fire-fighting water system,
such as a wall hydrant for self-help,
backfire protection in the case of solid
fuel boilers, sprinkler systems
- Any type of emergency cooling device,
such as thermal flow protection
- Any type of re-feeding equipment
for relevant systems which have the
potential to cause more damage
than leaking water if they are not
operational, such as the cooling
system in a server room or heating in a
greenhouse
16

In general, a section to stabilise the flow on
the inlet is not required for installation of the
RE.GUARD water control device. However,
for installation directly after a deflection (e.g.
a 90° bend/angle), a stabilisation section of
approx. 5xDN is recommended to improve the
measurement results for flow and pressure.
In the shell construction phase, it is possible
to replace the RE.GUARD water control device
with a water meter adapter that is 190mm in
length with G1" external thread connections. This
adapter is not part of the delivery contents and
must be procured on-site.
It is recommended to leave at least 20cm of
free space above the display for operation and
maintenance of the RE.GUARD water control
device. This allows the top of the housing to be
removed without risk of damage.
When selecting the location of installation,
please also refer to Chapter “3.3.2 Z-Wave®–
fundamentals”, page15, page and Chapter
“3.6.1 Connect to the mains supply”, page27,
page.
Also observe the instructions in Chapter
“2.2 Range of application”, page9.
For the reliable detection of leaks,
in particular for the detection of
micro leaks, all installed check valves (after
the domestic water meter, after the branch
for the water provision, on any appliances)
must work correctly. Ensure their function
through regular maintenance.
Expansion vessels installed in the drinking
water system, e.g. in the supply to the
boiler, can cover up any micro leaks
and therefore reduce the likelihood of
detection.
17

3.4.3 Permissible installation positions
Malfunction due to an incorrect
installation orientation is possible.
‘Upside-down’ installation is not permitted,
i.e. with the display facing downwards.
It is to be observed that the device is
installed correctly observing the flow
direction (flow arrows on the device , see
Chapter “3.4.4 Installing the RE.GUARD
water control device”, page20) and
that, if necessary, the top of the housing
including the display panel must be rotated
by 180° depending on the operating
direction (see Chapter “3.5 Rotate the top
of the housing”, page25).
Horizontal installation
The standard installation horizontally of the
RE.GUARD water control device is horizontal with
the display facing upwards.
Fig. 3-5 Horizontal installation
Distance x from wall ≥ 60 mm
The possible wall distance x is minimised with
best possible better access to the display or to
remove the top of the housing, for example, to
replace the battery or perform maintenance.
If a water meter bracket is being used, a greater
distance from the wall may be necessary.
Horizontal installation rotated up to 90°
Alternatively, the RE.GUARD water control device
can be rotated forward up to 90° when installed
horizontally.
Fig. 3-6 Horizontal installation rotated up to 90°
Distance x from the wall at 90° ≥ 85mm
The required wall distance x increases the further
forward the device faces.
Turning the device further than 90°
may cause the device to malfunction.
If the water meter bracket is being used, a
greater distance from the wall may be necessary.
X
X
≤90°
≤90°
18

Vertical installation
Alternatively, the RE.GUARD water control device
can also be installed in vertical pipe sections.
Fig. 3-7 Vertical installation
Distance x from the wall at 90° ≥ 85mm
The orientation of the device, including the
operating panel, depends on the conditions at the
location of installation and the desired operating
direction. It can be adjusted by rotating the
device 90° to the right or left.
If the water meter bracket is being used, a
greater distance from the wall may be necessary.
X
≤ 90°
≤ 90°
19

3.4.4 Installing the RE.GUARD water control device
The RE.GUARD water control device can be
installed in two ways:
- With water meter bracket and water meter
screw connections
- With pipe brackets
Both types of installation are described here and
allow the RE.GUARD water control device to be
integrated into the drinking water network tension
free.
Risk to life due to electric shock
In the case of older buildings,
check whether the metal water pipe is
used as a grounding for the electrical
installation. A domestic water meter
bridged with a cable is a clear indication
of this.
Ensure there is an alternative grounding
before opening the pipe.
Crushing hazard
The device has an electrically
operated shut-o function.
Never insert objects or body parts into
the pipe openings if there is voltage
present from the mains adapter or if the
emergency batteries are inserted.
Damage to property due to
incorrect handling
Do not use the housing or any other parts
of the RE.GUARD water control device
as support when tightening the thread
connections.
To support the device when tightening the
threaded connections, use only the wrench
flats behind the thread connections.
20