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Timeswitch specification 
CentaurPlus ZW

Contact Rating 3 (1) Amps 230V AC

Contact Type Micro-disconnection changeover

Voltage free

Supply 230V AC 50Hz only

Pollution Degree 2

Impulse Voltage Rating 2500V

Class A Software Type 1 Control

Operating Temperature Range 0 °C to +40 °C

Battery  Life  10  months  continuous  operation 
(minimum)

Case Material Thermoplastic, flame retardant

Ball Pressure Test Temperature 75 °C

Dimensions 84mm x 150mm x 29mm

Display Back lit liquid crystal

Clock 12 hour AM/PM

Auto BST/GMT changeover

Displayed  Time  adjustments  1  minute  steps 
Switched Time adjustments

Operating periods per day - 3 per day(Separate 
programmes possible for each day of the week) 
10 minute steps

Override  1  hour  boost,  1  hour  extension  to  On 
period, instant advance

Mounting Industry standard 6 terminal plug in wall 
plate

Transmitter Frequency 868MHz

Design Standard EN60730-2-7 

IP30

EN300-220 R & TTE Directive

EN301-489 

Thermostat specification
HRT4-ZW

Power supply 2 x AAA alkaline batteries

Temperature ac/- 0.5°C

Transmitter frequency 868MHz

Dimensions 86mm x 86mm x36.25mm

Pollution control Degree2

Design standard EN60730 - 2-9

Temperature range 5°C – 30°C

Enclosure protection IP30

Operating temperature range 0-40°C

Case material Thermoplastic, flame retardant

For further replacement timeswitch exchange

information, please see the ‘Programmer

Wiring and Replacement Guide’ at

www.horstmann.co.uk

Use the categories shown under

CentaurPlus C11 and C17.

12

Secure Controls (UK) Limited

South Bristol Business Park

Roman Farm Road, Bristol, BS4 1UP

E-mail: [email protected]

Web Site: www.horstmann.co.uk

Leaflet number P84372 – Issue 3 

Summary of Contents for CentaurPlus ZW

Page 1: ...g timeswitch with the CentaurPlus ZW will allow the room thermostat to be connected wirelessly producing immediate energy savings in houses where no previous room thermostat has been fitted The device...

Page 2: ...le circuit diagram for a typical combi boiler installation is shown below This diagram is schematic and should be used for guidance only N N E L L 1 2 3 4 For precise terminal connection information p...

Page 3: ...mounted remembering that the backplate fits to the left hand end of the control Mark the fixing positions through the slots on the backplate fixing centres of 60 3mm drill and plug the wall then secu...

Page 4: ...ty must be maintained and all bare earth connectors must be sleeved Ensure no earth conductors are left protruding outside the central space enclosed by the backplate Internal diagram C17 ZW The Centa...

Page 5: ...of the unit locate into the terminal slots in the backplate Tighten the two captive retaining screws to fix the unit securely Then switch on the mains supply On completion of the installation please r...

Page 6: ...IT During power interruptions the display will be blank after 3 days the current time of day will be lost These measures are to prolong the battery life SERVICEAND REPAIR This timeswitch is NOTuser se...

Page 7: ...ide optimum comfort with close control of the energy used to heat the home without the need for additional wiring or unsightly cable runs The HRT4 ZW will only operate when 2 x AAA batteries have been...

Page 8: ...o make the boiler switch on and off N B There is a half second delay in switching On and Off on receipt of the commands There is no click from the thermostat which is silent in operation but there wil...

Page 9: ...ollowing the procedure shown under Stage 1 of the pairing instructions Only use Stage 2 if a radio link cannot be successfully established between the two devices Stage 2 only used if above procedure...

Page 10: ...l far more efficiently than any traditional thermostat When used with a condensing boiler the TPI thermostat will help to save energy as the control algorithm allows the boiler to operate in condensin...

Page 11: ...Ensure that there will be enough space to allow easy access to the two retaining screws located at the base of the wall plate Before fixing the wall plate in position check to see that the thermostat...

Page 12: ...xtension to On period instant advance Mounting Industry standard 6 terminal plug in wall plate Transmitter Frequency 868MHz Design Standard EN60730 2 7 IP30 EN300 220 R TTE Directive EN301 489 Thermos...

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