HRT4-ZW and ASR-ZW User and Installation Instructions Wireless Z–Wave Battery Operated Electronic Room Thermostat with LC (Load Compensation) temperature control software and ASR-ZW receiver unit. The HRT4-ZW is a wireless electronic battery powered room thermostat that uses interoperable two-way RF mesh networking technology to provide optimum comfort with close control of the energy used to heat thehome without the need for additional wiring or unsightlycable runs.
For the user What is a room thermostat? ... an explanation for householders A room thermostat simply switches the heating system on and off as necessary. It works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. Turning a room thermostat to a higher setting will not make the room heat up any faster.
User Instructions The HRT4-ZW thermostat uses the latest control technology to provide extremely accurate temperature control which will help to keep your energy usage as low as possible without affecting your comfort levels. In fact comfort levels may well be improved as the control accuracy should ensure that the room does not 'overheat' before switching off. The display will show the required temperature setting and can be adjusted in increments of 1°C.
Battery replacement The HRT4-ZW runs on 2 x type AAA (Alkaline) non rechargeable batteries and is designed to give a battery life of approximately two years. When the batteries are nearing the end of their life a low battery symbol will appear in the display and the batteries should be changed within a few days. If the batteries are not changed at this point eventually a 'LO' battery message flashes intermittently in the display and if this happens the batteries should be changed immediately.
ASR–ZW receiver unit The ASR–ZW receiver unit receives the Z-Wave radio signals from the HRT4–ZW room thermostat. In the unlikely event of a communication failure it is possible to override the system and switch On and Off using the On/Off buttons on the ASR-ZW receiver as a local override. If the override is used to override the HRT4-ZW thermostat when it is functioning correctly then the override will be cancelled by the next switching operation of the thermostat and normal operation will be resumed.
Installation Instructions Installing the ASR-ZW Receiver The ASR-ZW receiver should be located as near as is practical to the boiler or zone valve to be controlled, as well as a convenient mains electricity supply. To remove the wall plate from the ASR-ZW, undo the two retaining screws located on the underside, the wall plate should now be easily removed. Once the wall plate has been removed from the packaging please ensure the ASR-ZW is re-sealed to prevent damage from dust, debris etc.
Electrical Connections WARNING: ISOLATE THE MAINS SUPPLY BEFORE COMMENCING INSTALLATION As the HRT4-ZW is a wireless product with no electrical connections all electrical wiring will be made to the ASR-ZW receiver. All necessary electrical connections should now be made. Flush wiring can enter from the rear through the aperture in the backplate. The mains supply terminals are intended to be connected to the supply by means of fixed wiring. The receiver is mains powered and requires a 3 Amp fused spur.
Typical combi boiler system with built in timer This diagram shows a typical receiver and combination boiler installation, where the external boiler control is connected via switching terminals (a link may have to be removed on the boiler switching control terminals). Mains supplies to both the receiver and the boiler are omitted for clarity. Please consult the boiler manufacturers installation handbook before commencing any installation work.
Fitting the HRT4-ZW Room Thermostat Before final installation it is advisable to commission the product and ensure that the Thermostat and Receiver are communicating satisfactorily. First install the 2 x type AAA batteries provided making sure that they are fitted correctly as indicated by the markings in the battery compartment. Once the thermostat and receiver are successfully 'paired' the thermostat can be installed in its correct location. Please see Z-Wave pairing instructions on page 10.
DIL switch settings - LC temperature control software Thermostats using LC control algorithms will reduce the temperature swing that normally occurs when using traditional bellows or thermally operated thermostats. As a consequence, an LC regulating thermostat will maintain the comfort level far more efficiently than any traditional thermostat.
Stage 1 1) Set the number 1 DIL switch on the back of the HRT4-ZW thermostat to the On (Up) position and the display on the HRT4-ZW will change to show the letter 'I'. If the letter 'L' appears, carry out stage 1A opposite. CYCLE 2) Power up the ASR-ZW receiver unit 3) The network LED on the ASR-ZW receiver should be flashing. 4) Press the dial on the front of the HRT4-ZW thermostat once so that the 'I' in the display flashes.
Under normal circumstances the HRT4-ZW thermostat and ASR-ZW receiver will be 'paired' easily by following 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 1A – Only used if 'L' is displayed instead of 'I' 1) Turn the dial of the HRT4-ZW until the letter P appears in the display. 2) Press the dial twice. 3) A second P should appear in the display which now shows `PP'.
Thermostat Specification Electrical Purpose of Control HRT4-ZW Supply Software Class Electronic Room Thermostat RF (Independently Mounted) 3V dc. (2 x AAA Alkaline Batteries) Class A Radio Compliance RF Frequency Receiver Category Power Class RF Range Zwave compliant 868.42MHz (EU) Category 3 Class B >100 m line of sight Mechanical Dimensions Case Material Ball Pressure Test Mounting 86mm x 86mm x 36.
Receiver Specification Electrical Purpose of Control ASR-ZW Contact Rating Contact Type Supply Control Action Operating Time Limitation Software Class Electronic Multi Purpose Control (Independently Mounted) 3(1)A 230V AC Micro-Interruption 230V AC 50Hz only Type 1B Intermittent Class A Radio Compliance RF Frequency Receiver Category Power Class RF Range Zwave compliant 868.
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Secure Meters (UK) Ltd Secure House, Lulworth Close, Chandler's Ford, Eastleigh, SO53 3TL, UK t: +44 1962 840048 f: +44 1962 841046 www.securemeters.
