MAKING MODERN LIVING POSSIBLE

RET BZ Danfoss Heating

Z-Wave Electronic Dial Setting Room Thermostat with LCD

For a large print version of these instructions please call Marketing on 0845 121 7400.

Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

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Installation Instructions Features Contact rating Temperature Accuracy Contact Type Transmitter frequency Transmitter range Power Supply Control Pollution Situation Rated Impulse Voltage Designed to meet Ball Pressure Test Temperature Range Dimensions (mm)

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RET BZ 10 - 230 Vac, 3 (1) ±1°C SPDT Type 1B 868.42 MHz 30m max 2 x AA/MN1500 alkaline batteries Degree 2 2.5 kV BS EN 300220 75°C 5-30°C 85 wide x 86 high x 42 deep

Important note RF products: Ensure that there are no large metal objects, such as boiler cases or other large appliances, in line of sight between the transmitter and receiver as these will prevent communication between thermostat and receiver. Danfoss Heating

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What is Z-Wave? Z-Wave is a networking system and protocol to allow small domestic networks to be created of different manufactures products that comply with the Z-wave rules and interact at a networking level, allowing information to flow between the different products, giving the user an enhanced and smarter living environment.

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What is the RET-BZ? The RET-BZ is a radio frequency (RF) thermostat for domestic applications using the European IMS frequency band of 868.42 MHz, which is designed to be used in Danfoss heating and third party networks using the Z-wave networking protocol. The RET-BZ has the capability to perform the control of either a heating or cooling system and has the control methods of ON/ OFF and Chrono-proportional available to the installer. 4

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Within a Z-wave network, the RET-BZ is classified as a battery slave device that can control the status of a relay once included into a network.

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To conserve battery life the RET-BZ spends the majority of the time in a, none communicating low power mode and only wakes-up to change the relay state or when the user changes the required temperature.

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Chrono-Proportional Control What is it and what use it...

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Chrono-Proportional control is an energy saving feature which fires the boiler at regular intervals to maintain a set temperature, achieving a constant ambient environment for the user. The use of an electronic thermostat with chrono-proportional capability provides closer temperature control plus possible reductions of 10% in both fuel cost and carbon emissions.

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Control

Energy Cost (£)

Energy Savings (£)

Carbon Emissions (kg CO2)

Carbon Savings (%)

Mechanical On/Off

2.39

-

13.56

-

Electronic On/Off

2.34

2.10

13.25

2.31

ChronoProportional

2.14

10.35

12.11

10.71 RETBZ

Mounting

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Fix at a height of 1.5m approx from the floor, away from draughts or heat sources such as radiators, open fires or direct sunlight. Danfoss Heating

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DIL Switch Settings Slide the DIL switches to the settings required (see below).

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Heating selection COOL

HEAT

ON/OFF

CHRONO

6 (OR 12)

3 (OR 6)

6 & 12

3&6

Cooling selection COOL NO DELAY 4 MIN DELAY NOT USED

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HEAT COMPRESSOR DELAY

2 MIN DELAY NOT USED

ON/OFF - boiler switches ON when below set temperature and OFF when above CHRONO - energy saving feature which fires the boiler at regular intervals to maintain a set temperature, achieving a constant ambient environment for the user. See page 4 information.

for more RETBZ

Locking & Limiting

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Receiver Wiring RXZ1

RXZ2 and RXZ3

ELECTRONICS

ELECTRONICS

TERMINAL 6 RX3 ONLY

N L 1 2 3 4 COM

ZONE 1 ON

ZONE 1 OFF

A B C 1 2 3 4 5 6 N

L

COM

ZONE 1 ON

ZONE 1 OFF

ZONE 2 ON

ZONE 3 ON

Note: 1) For mains voltage operated systems, link terminal 2 to mains live supply. 2) Power supply to unit must not be switched by timeswitch. Danfoss Heating

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Connecting (binding) RET-BZ to the Danfoss RXZ

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To initiate a connection with another Z-Wave enabled unit (i.e. RET BZ), the RXZ must be placed into PROGRAMME MODE. Once the RXZ is in PROGRAMME MODE, each channel will present whether it has an existing binding in the following way: Channel LED RED = unbound/no device present. Channel LED OFF = Channel successfully bound/ device located and communication established. Channel LED flashing RED = a device is bound to the channel but the RXZ has received no communication since being powered on. To establish communication and bind a device to the relay output of the RXZ: 10

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1.

If your RET BZ is not included in the network, the LCD will cycle between showing the current temperature and LE on the display. On the RXZ, press and release PROG button. The PROG LED will light up RED.

2.

Any channel with no devices bound will show a RED LED.

3.

Press the button for the channel you wish to bind, the LED will flash RED slowly.

4.

On the RET BZ press the ‘include initiator’ button for at least 5 seconds. When binding is successful the LCD will show:

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include / exclude initiator Button

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5.

Once binding has finished the LED for the channel just bound will go out indicating success. If there was an error in the binding process the PROG LED on the RXZ will flash orange rapidly. If this occurs, press PROG to acknowledge the error and then return to step 1 to begin the process again.

6.

To continue installing devices to other channels (RX2Z and RX3Z only) repeat steps 3 to 5.

7.

Press PROGRAMME on the RXZ to return to normal operating mode (PROGRAMME LED shows GREEN).

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Removing (Un-binding) the RET BZ from RXZ Occasionally you may need to remove the RET BZ thermostat or other Z-Wave device from the RXZ receiver i.e. if the thermostat is bound to the wrong channel. To do this, follow the procedure below: 1.

Press PROGRAMME on the RXZ to set it into PROGRAMME mode (PROG LED turns RED)

2.

Press the button for the associated channel to be unbound/disconnected.

3.

On the RET BZ press the ‘exclude initiator’ button for at least 5 seconds. When unbinding is successful the LCD will show:

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include / exclude initiator Button

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4.

When the device has been removed, the red LED for that channel on the RXZ will illuminate continuously.

5.

To continue removing devices from other channels (RX2Z and RX3Z only) repeat steps 2 to 4.

6.

Press PROGRAMME on the RXZ to return to normal operating mode.

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Including (binding) the RET-BZ into a Danfoss network

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To install the RET-BZ, the installation needs to be started by a controller device in the network (See documentation of network controller device i.e. FP715Z). If the RET- BZ is not included in the network, the RET-BZ units LCD display will alternate between the currently measured temperature and LE. To install the unit, perform the following: 1. Start network inclusion process with controller device (see documentation provided with controller device for instructions). Danfoss Heating

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2.

On the RET BZ press the button under the setting dial for at least 5 seconds.

3.

Successful inclusion and association to a relay channel is indicated by the LCD display flashing ‘In’ for 2 seconds and then starts to function correctly by displaying the currently measured temperature.

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include / exclude initiator Button

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Including (binding) the RET-BZ into a Third party network

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Note! The device that the RET-BZ is to be associated to in the network needs to be included into the network before attempting to link the RET-BZ to it. The steps to include and associate the RET-BZ to a device are the same as those outlined for including the device into a Danfoss network.

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Removing (Un-binding) the RET BZ from a 3rd party network

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Occasionally you may need to remove the RET BZ thermostat from a network. To do this, follow the procedure below: 1.

Follow instructions with the 3rd party device to initiate disconnection from the network

2.

On the RET BZ press the ‘exclude initiator’ button for at least 5 seconds. When unbinding is successful the LCD will show: include / exclude initiator Button

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Troubleshooting the inclusion process (status codes)

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Should the network connection fail the RET-BZ will display one of the following status codes: • LE – RET is not a part of the network. • L1 – RET included into network, but the association process to a node has failed. • L2 – RET inclusion and association occurred correctly, but the associated device does not support one of the required classes to be fully functional.

Overriding L2 condition If incorporating the RET-BZ into a network which does not support the full functionality of the RET-BZ, but you still wish to continue using it, you can override the L2 error status and continue to use the RET-BZ by doing the following: Danfoss Heating

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1.

Press include/exclude button for at least 5 seconds.

2.

L2 is removed and RET-BZ will transmit all reports and set parameters.

Advanced Features The below features are mainly of interest to software and system integrators involved with setting up Z-Wave networks.

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Stay-Awake Function If required, it is possible to make the RET-BZ go into a mode by which the RET-BZ will stay awake and listen for commands from the controlling device to allow application specific testing to occur.

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This feature is enabled by the installer and available after the RETBZ is full included in the network, and is activated by: 1.

On the RET-BZ press the include/exclude button under the setting dial for 1 second and then release, if the button is pressed for over 5 seconds, the RET-BZ will detect this as a install/uninstall command).

Warning! This will run your battery down if used repeatedly.

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Basic Class Mapping The RET-BZ supports the mapping of the thermostat set-point to the basic command class to allow third party devices to control the units’ set-point using the basic set. For details of the supported and controlled classes see below:

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Class Multi* Binary switch Multi instance association Battery Vn1 Thermostat set point Multi-level sensor Vn1 Wake-up Association Manufacturer Proprietary Manufacturer Specific Version Basic Multi Instance 22

Supported/Controlled Support & Control Control Support Control Support & Control Support & Control Support & Control Support Support & Control Support Support Support Control RETBZ

* This device should only be associated to products that support the Multi Command-Class, Should you wish to associate this device to a product that does not use this class using the L2 override; this is acceptable, but the battery drain is significantly increased as each message is sent independently and only a limited amount of information is transmitted.

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The limited messages are: Currently measured temperature Currently defined set-point Wake-up notification (transmitted every 2 hours or when the user changes the set-point via the dial).

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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. How quickly the room heats up depends on the design of the heating system, for example, the size of boiler and radiators. Neither does the setting affect how quickly the room cools down. Turning a room thermostat to a lower setting will result in the room being controlled at a lower temperature, and saves energy. 24

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The heating system will not work if a timeswitch or programmer has switched it off. The way to set and use your room thermostat is to find the lowest temperature setting that you are comfortable with, and then leave it alone to do its job. The best way to do this is to set the room thermostat to a low temperature – say 18°C – and then turn it up by one degree each day until you are comfortable with the temperature. You won’t have to adjust the thermostat further. Any adjustment above this setting will waste energy and cost you more money. If your heating system is a boiler with radiators, there will usually be only one room thermostat to control the whole house. But you can have different temperatures in individual rooms by installing thermostatic radiator valves (TRVs) on individual radiators. If you don’t have TRVs, you should choose a temperature that is reasonable for the whole house. If you do have TRVs, you can choose a slightly higher setting to make sure that even the coldest room is comfortable, then prevent any overheating in other rooms by adjusting the TRVs. Room thermostats need a free flow of air to sense the temperature, so they must not be covered by curtains or blocked by furniture. Nearby electric fires, televisions, wall or table lamps may prevent the thermostat from working properly. Danfoss Heating

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User Instructions Display

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The LCD displays actual room temperature until the setting dial is moved.

Setting the temperature Turn setting dial to required temperature. The selected temperature will flash in the LCD to signify it is showing set temperature. After a short period the display stops flashing and shows actual room temperature.

Thermostat status (heat mode only) A flame symbol will be lit whenever the thermostat is calling for heat. 26

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Thermostat status (cool mode only) A snowflake symbol will be lit whenever the thermostat is calling for cooling. If this is seen to flash, the thermostat output is delayed for a short period to prevent compressor damage.

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Low battery indication A battery symbol will flash in the display when batteries require replacement. Batteries should be replaced within 15 days, after which the thermostat will turn off the load it is controlling. When this happens “Of” will be displayed. IMPORTANT: alkaline batteries must be used.

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Glossary

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Binding

The act of linking a remote wireless unit (i.e. thermostat or time controller) to a network.

Include / Exclude On every Z-Wave product there will be initiator button a button or process to tell the device to send out a request to join or leave an existing or new network.

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LED

Light Emitting Diode

Z-Wave

A wireless communication protocol designed for low-power and lowbandwidth appliances, such as home automation and sensor networks.

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Danfoss Randall Ltd. Ampthill Road Bedford MK42 9ER Tel: 0845 1217 400 Fax: 0845 1217 515 Email: [email protected] Website: www.danfoss-randall.co.uk Part No 25331v01s1-00 09/09