Rehau NEA H 24 V User manual

NEA H 24 V & NEA H 230 V
REHAU ROOM THERMOSTAT
USER INSTRUCTIONS AND QUICK INSTALLATION GUIDE
www.rehau.co.uk
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Safety
Important info
Your benefit
Scope of supply
Thermostat (1 pc) Anchors & Screws (2 pcs) Manual (1 pc)
Contents
Scope of supply . . . . . . . . . . . . 30
Introduction . . . . . . . . . . . . . . 31
Product compliance and safety . . . . 31
Safety information . . . . . . . . . . . 31
Installer parameter settings, expert level 32
Mounting position and installation . . . 33
Removing cover from the Nea . . . . . 39
Thermostat control and display . . . . 40
Adjusting set temperature . . . . . . . 42
Operational modes. . . . . . . . . . . 42
Display messages . . . . . . . . . . . 43
General function information . . . . . . 43
Technical data . . . . . . . . . . . . . 44
30

Introduction
Thank you for purchasing the REHAU room
thermostat Nea. The Nea H is a parameter-
izable digital room thermostat which is
available in 24 V and 230 V versions and
oers simple temperature adjustment of
your heating system.
By purchasing one of the REHAU room
thermostats Nea you have decided on an
electronic thermostat that allows you to
adjust surface heating applications
individually, such as underfloor, wall or
panel heating. Tailor-made single room
control can be implemented depending on
system design. A clear energy saving is
possible by reducing temperature.
We hope you enjoy this product.
Product compliance and safety
Product compliance
This product is CE compliant and meets the
following EC Directives
- Electro-Magnetic Compatibility Directive
2004/108/EC
- Low Voltage Directive 2006/95/EC
Safety information
Use in accordance with the
regulations.
The room thermostat Nea H is to be used
for the room control of hot water surface
systems inside the house and not
considered for flow control or flow control
supervision in case of heating or cooling. In
this context the Nea H must be used
exclusively to drive thermal actuators. The
manufacturer is not liable for improper use.
Authorized specialists
The electrical installation must be
performed according to the current national
regulations as well as according to the
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regulations of your local electric power
utility company. These instructions require
special knowledge corresponding to an
ocially acknowledged degree in one of the
following professions:
- Electrical Equipment Installer or
Electronics Engineer
According to international regulations, as
well as according to comparable profes-
sions within your specific country law.
Sources of danger
The thermostat must be discon-
nected from the mains supply or fuse
before removing the cover.
Emergency
Switch o the voltage to the
complete individual room temperature
control system.
Installer parameter settings, expert level
The thermostat Nea is equipped with
various parameters. These parameters can
easily be modified for your specific
application. See the Nea Service and Expert
Parameters section at www.rehau.com/nea
Please note that the parameter
sections must only be entered by an
installer or competent person. Changing
these parameters can have a serious eect
on the heating system.
Please enter any parameter changes
in the installer notes section.
32

Mounting position and installation
To ensure trouble free operation and
ecient control. The room
thermostat Nea is best positioned in a draft
- free area and at 130 cm from the floor. Do
not position the thermostat near any heat
source, behind curtains, direct sunlight or in
an area of high humidity.
- Not to be positioned on exterior wall
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
For your benefit symbol
To ensure trouble free operation and efficient control. the room thermostat Nea
is best positioned behind a door and at 130cm from the floor.
(Pic)
Do not position the thermostat:
1. Near any heat source (pics)
2. Behind curtains(pic)
3. Direct Sunlight(pic)
4. In a bathroom or area of high humidity(pic)
Info symbol
· Not to be positioned on exterior wall
· Do not install the remote sensor (if applicable) in an empty tube
· Only the temperature at the position of remote sensor (if applicable) is measured
130cm
130cm
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Installation
1Wall mounting
For wall mounting, mark and mount the rear
case to the wall. The Nea is suitable for wall
boxes with a center hole distance of
60mm.
* screw head maximum size
2Wiring connections
Solid and stranded wire
max 1.5 mm² square
A55 mm
B8 mm
7 mm*
60 mm
19 mm
75 mm
88 mm A
B
Wiring connection Nea H 24 V & 230 V
34

Nea H wiring
* Room thermostat Nea H 230 V and 24 V are separate models
Optional External Time Switch
Max. 5 Thermal Actuators
L/L1 N/L2
L1
L2
L
N
24 V230 V
230 V AC
L N
24 V AC
L1 L2
230 V AC / 0.2 A
Resistive Load
24 V AC / 1 A
Resistive Load
24 V230 V
H* H*
H* H*
L
N
External time switch (Phase balance)
Load (Thermal Actuators)
Neutral
Phase
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* Room thermostat Nea H 230 V and 24 V are separate models
Max. 5 Thermal Actuators
Max. 5 Thermal Actuators
Optional External Time Switch L/L1 N/L2
L1
L2
L1
L2
L
N
L
N
230 V AC
L N
24 V AC
L1 L2
230 V AC / 0.2 A
Resistive Load
24 V AC / 1 A
Resistive Load
24 V230 V
24 V230 V
H* H*
H* H*
L
N
External time switch, phase balance
Load (Thermal Actuators)
Neutral
Phase
36

* Room thermostat Nea H 230 V and 24 V are separate models
L/L1 N/L2
L1
L2
L1
L2
L
N
L
N
230 V AC
L N
24 V AC
L1 L2
230 V AC / 0.2 A
Resistive Load
24 V AC / 1 A
Resistive Load
24 V230 V
24 V230 V
H* H*
H* H*
L
N
External time switch (Phase balance)
Load (Thermal Actuators)
Neutral
Phase
WIRING CENTRE
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Ensure that the cable is contained
within the shaded area.
3Locate the front cover on rear case,
ensuring that the hinged clips are located
first.
Ensure that the two arrows are
aligned properly before closing.
4Locate hinge first
20 mm
25 mm
38

5Gently locate the cover locking clip in
rear case location and close it.
Ensure cover locking clip is secure in
the rear case.
Removing cover from the Nea
1Use tool to gently push the cover
locking clip vertically.
Recommended width 5 mm for tool.
2Pull the base of the cover assembly
away from rear case.
3Remove cover and put in safe place.
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Thermostat control and display
Powering up for the first time
AAfter power up, all LCD segments are turned on
for two seconds.
BAfter initialization the room thermostat will show
the standard display.
The room thermostat is powering up with
the factory default settings. After a power
failure the thermostat will continue the
operation mode as it was before the power
failure. This will be up to 15 hours if the
unit has been fully powered for 24 hours.
Installers parameter settings are
permanently stored on power failure.
Key assignment
Decrease temperature. Also back in
menu settings
Increase temperature. Also forward in
menu settings
Enter / Exit
Flashing symbols or numbers are
changeable
A
B
AM PM
1234567 RSF
R
+-
PM
R
40

LCD icon
Indicator Description Explanation
Temperature Shows the actual room (R) temperature or the set (S) point temperature.
The set point temperature is your required room temperature
RRoom temperature The displayed temperature is the current room temperature
SSet point temperature The displayed temperature is the required room temperature
Heating active Heating mode is active
Normal mode Operation mode normal is active
Reduced mode Operation mode reduced is active
Time switch program The thermostat will automatically select operation mode normal and reduced
based on the external time switch
Lock mode Protect the room thermostat against unauthorized access
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Adjusting set temperature
Reducing set temperature
To view the set point temperature only press once
Operational modes
Selection - Standard thermostat
1Normal operation: Default set point 22ºC
2Reduced operation: Default set point 18ºC
3Auto operation: Only with external time switch
4Operational mode o (optional)
When the Nea is set to OFF there is
automatic frost protection active. If the
R
S
S
R
1
2
3
4
or
or
R
2
3
4
R
R
1
or
or
or
or
42

temperature falls below 5 ºC the heating
valve will be activated.
If an external time switch is activated
and the clock is displayed then the
change in set temperature is temporary.
The set point will return to normal / reduced
on next time switch program change. To
accept changes, press .
Auto - Standard thermostat
ATime switch program activ; normal mode
BTime switch program activ; reduced mode
Display messages
AFrost protection is active
BRoom temperature out of sensor range
Frost protection display will remain
until any key is pressed.
General function information
Valve protection
To protect the valves the output is turned on
for 5 minutes in every week. This function
stops the valve from getting stuck due to
long periods of inactivity.
Pulse width modulation
Room temperature control is achieved by
A
B
R
R
R
A
B
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opening and closing the circuit control
valves for defined times. The opening time
of the valves is determined by the required
energy supply.
PI control
The PI control adjusts the control signal
gradually to the demand of the system, in
order to optimize the control result. This
optimization must be applied very cautiously
in case of surface heating and cooling.
Cleaning your Nea
Only use a soft, dry, solvent-free cloth for
cleaning.
A blown fuse can indicate an error
within your system. Before replacing
the fuse, the system must be checked by
an authorized specialist.
Technical data
Nea H 230 V Nea H 24 V
Operating voltage 230V-AC+/-10% 24V-AC+20%-10%
Max. switch current 0.2 A* 1 A*
Fuse 0.63 A T 1 A T
Safety Class II Class III
Max no. of actuators 5 x 3 W
Degree of protection IP30
Anfi freeze operation 5 °C
Valveprotectionfunction 5 min/week
Dimensions frontside 88 x 88 (mm)
Dimensions backside 75 x 75 (mm)
Depth 26 (mm)
Storage temperature -20 to 60 °C
Ambient temperature 0 to 50 °C
Relative humidity Max. 80 %, non condensing
* Resistive load
Insofar as the intended application deviates from that described in the relevant Technical Information brochure, the user must
consult REHAU and must receive express written consent from REHAU before commencing this utilization. If the user fails to
do so, the sole responsibility for the utilization shall lie with the individual user. In this case, the application, use and processing
of products are beyond our control. Should a case of liability arise, however, this shall be limited to the value of the goods
delivered by us and used by you in all cases of damage. Claims arising from granted guarantees shall become invalid in the
case of intended applications that are not described in the Technical Information brochures.
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REHAU AG + Co, Otto Hahn Str. 2, 95111 Rehau, Germany