Rehau STAR 30 Service manual

Digital Room Temperature controller for underfloor heating.
Operating and mounting instructions
General
Congratulations on choosing the new REHAU digital room controller. In select-
ing the REHAU Star 30 you have chosen a digital room temperature controller
which oers key advantages over conventional mechanical products:
The control device can be easily operated by means of two buttons on
the front cover. This controller is backlit for ease of operation with a large
numeric display. It also oers you unique control simplicity for heating applica-
tions of all types thanks to the high quality controller electronics. This control-
ler ensures that the set room temperature is maintained without fluctuation
and when required a time signal input automatically activates a reduction in
temperature (night setback).
The controller displays the current room temperature in stand by mode, yet
one touch operates the backlight facility. For extra protection its inbuilt frost
protection gives total protection for the client.
Building regulations and the environment
REHAU have a commitment to assist building owners and occupiers to reduce
their carbon footprint. One such way of reducing the energy used, is the
eective control of heating and hot water. One way to reduce this energy is to
only burn fuel when there is a demand for heat from the boiler, either for heat-
ing or hot water. When this demand is satisfied, then the boiler should switch
o again – it should not be able to fire until a new demand is created by the
controls. This is called Boiler Interlock and represents the minimum standard
REHAU STAR CONTROLS
STAR 30 -DIGITAL ROOM CONTROLLER, ART NO: 206028
required under the Building Regulations for new and existing heating systems.
The following characteristics of the REHAU Star 30 guarantees you precise,
comfortable and energy saving operation of you room heating system.
Technical characteristics
Pulse-Width-Modulation (PWM)
Underfloor heating has the basic problem of Temperature overshoot. i.e. the
room continues to be heated even when the valve is closed and the desired
room temperature has been reached. The REHAU Star 30 solves this problem
electronically and extremely eectively using Pulse-Width-Modulation (PWM),
It operates using a constant comparison of desired and actual temperature.
The opening period of the actuators is adjusted as to avoid over and under
shoot, therefore the actual is much closer using PWM to the desired setpoint
temperature. This achieves an exact and comfortable control of the set point
desired temperature.
Please note:- if the REHAU Star 30 is used for radiators or convection
heating systems, the Pulse-Width-Modulation (PWM) can be switched o (see
basic settings section).
Frost protection
The controller can be used for frost protection by activating Its frost protection
the mode. Once selected the preset value Is set at 5°C.
To activate the frost protection mode press both the + and – buttons at the
same time for at least 3 seconds, you will activate or deactivate the frost pro-
tection mode. If the frost protection mode is activated, this will be indicated
by a flashing symbol in the display. In this mode, you will not be able to
modify the desired temperature.
Valve protection feature
In order to ensure that the valves remain movable and functional even after
long periods out of operation - i.e. in summer, the REHAU controller is sup-
plied with a switchable valve exercising operation, this ensures that the valves
remain functional by operating the output each week. This valve protection
feature can be deactivated if required.
Temperature reduction (Night setback)
It is important to reduce energy and today we have the ability to reduce the
room temperature in times of inactive or no occupancy. This can reduce the
energy required in a normal dwelling by up to 30%.
The REHAU Star 30 allows you to automatically reduce the room temperature
by 4K, without the need to adjust the room unit, dependant on timed input i.e
(installed as a complete system).
Building Solutions
Automotive
Industry

Installation
The REHAU room unit is designed as an electronic temperature controller of
warm water heating systems and serves to control electrothermal actuators
or other electrical devices as appropiate. The maximum switching current
indicated in the technical data must be observed! REHAU cannot accept any
liability for any form of misuse.
The electrical installation must be carried out in accordance to the current
wiring regulations in force and must be in accordance with the connection
plan. Only approved certified professionals may carry out the installation.
Further more the installation is always to be carried out with the power supply
disconnected.
Position the room unit such that it is not covered by curtains, pieces of furni-
ture or other objects. The control should not be installed close to heat sources
(i.e. lamps, fireplaces/chimneys, direct sunlight etc.) and positioned away from
draughts. Ensure that it is fitted on a flat, solid surface that is non-conductive
between 1.2 - 1.5m o the ground floor. This allows the room temperature to
be exactly measured and correspondingly precisely controlled.
Wall mounting
Before mounting the wall unit, take o the housing cover from the base plate.
1. Remove the screw on the underside
2. Open the housing by lifting the housing cover on the bottom edge
and then lifting it.
Now firmly mount the base plate on the wall or the flush-mounted socket with
the screws provided.
Connection
Wire the room unit in accordance with the following connection plan:
REHAU Star 30 230 V version
Terminals
temperature Setback
N Neutral conductor supply feed
L 230 V AC supply
Switching output (valve actuator, terminal strip)
Jumper settings
Dierent REHAU Star 30 features can be switched ON or OFF using the jump-
ers shown:
REHAU Star 30 jumpers
Switch Feature ON OFF
VP Valve protection feature
PWM Pulse-Width-Modulation
Temperature reduction
The unit comes factory supplied with all jumpers set to ON. You can change
the settings in accordance with your requirements, by moving the jumpers
onto contact pins as above, ensure that jumpers are fitted i.e. in the correct
notation, and not removed.
Replace the cover in the reverse order to above.
Operation
The REHAU Star 30 Digital room controller is used for regulating the tem-
perature in dry, enclosed rooms with a normal environment and maximum
humidity of 95% (non condensing).
The desired temperature can be quickly and easily adjusted with the push
buttons. This electronic control system ensures that the set room tempera-
ture is maintained without fluctuation and when required a time signal input
automatically activates a reduction in temperature (night setback).
Each time you press any button, the display’s illumination will automatically
switch on. If there is no adjustment made then after 5 seconds, the illumina-
tion will switch o again automatically.
Pressing the + or – buttons this will take you to the display of the desired
temperature setpoint. Here you can modify this temperature by pressing
the + or – button repeatedly, in steps of 0.5K, until you reach your desired
setpoint temperature.
Note:- It is not possible to set temperatures of below 10°C or above
35°C.
If there is no activity for more than 5 seconds, the controller will automati-
cally adopt the amended desired temperature and will revert to the standard
display.
If a timer is connected and temperature set back is active, this will be dis-
played by a symbol in the display. If the controller calls for heat because
the actual temperature is below the desired temperature set,
this will be indicated by symbol in the display.
REHAU Star 30 Symbol Meaning
Temperature setback active
Heat required
blinking Frost protection mode active
Cleaning
Never use anything other than a soft, dry cloth to clean the unit. Never use
any cleaning agents containing solvents or any sharp objects to clean the
unit.
Technical Data 230V
Article No: 206028
Operating Voltage: 230VAC / 50Hz
Max. switching current: 10 (3) A
Hysteresis: 0.5K
Protection Rating: IP 30
Dimensions W/H/D: 75mm/75mm/30.5mm
Temperature range: 10°C to 35°C
Storage temperature: -25°C to 65°C
CE Approved
UK & IRELAND SALES OFFICES
London, REHAU Ltd, The Building Centre, 25 Store Street, London WC1E 7BT Slough, Units 5 J & K, Langley Business Centre, Station Road, Langley, Slough SL3 8DS Phone:
01753 588500 Fax: [phone] Glasgow, Phoenix House, Phoenix Crescent, Strathclyde Business Park, Bellshill, North Lanarkshire ML4 3NJ Phone: [phone] Fax:
01698 503701 Dublin, 9 St. Johns Court, Business Park, Swords Road, Santry, Dublin 9 Phone: 00353 (0)1 8165020 Fax: 00353 (0)1 8165021