Distributor Introduction to

Walker Wireless

• Since all wireless modules communicate together in a ZIGBEE mesh network the assignment of modules to a WZ_MicroSAC31 is arbitrary and not dependant on location or wiring.

• In many cases, for convenience, all wireless control panels (WZ_MicroSAC31) can be located in a single central location with all communication to external systems and devices via the wireless network.

• Alternately, wireless control panels can be located in mechanical rooms near the units they are controlling. In fact, more that one autonomous wireless network can be created.

Walker’s wireless product line is based on Walker’s IOBUS using EasySTAT products with ZIGBEE radios on board – it is a wireless IOBUS with some significant advantages over a wired one.

What is a Walker Wireless system

Simple System Architecture

The Walker Wireless Controllers then command the connected building infrastructure, such as roof-top units, baseboard heaters, solar panels or lights.

Operator Computer

Internet

Main control panel

Wireless Data

Walker Wireless Controllers

Wired Connectionsto Building Systems

On a computer with Connect-IMS installed, settings are adjusted over the internet within the main control panel installed in a central mechanical room.

Wireless information is then passed to the Walker Wireless controllers installed throughout the building.

CENTRAL CONTROL PANEL

These are the control panels for the 135 zone rooftop system at Lawson Mall in Saskatoon Canada.

Consists of:WS1500Bridge 2004Static IP Internet Bridge10 WZ_MicroSAC3110 WZ_ZCOORD mounted on the outside of the panel box.

135 Walker Wireless WZ_ROOFPTAC’S throughout the facility

Simple System Architecture

Inside the Control Panel:

• Within the control panel each WZ_MicroSAC31 is connected to the WS15xx or WS16xx via SmartLAN in a standard Walker network.

• The WZ_MicroSAC31 is then connected to a ZCOORD (Wireless coordinator) mounted on the outside of the panel box so that it is able to communicate with the wireless network. Connected to the WZ_MicroSAC31 by conventional wired IOBUS, the ZCOORD maps wireless packets to and from the WZ_MicroSAC31.

• As with wired IOBUS, each WZ_MicroSAC31 can have 20 wireless controllers mapped into its database as addresses 3 through 22 (ZCOORD is adr. 23).

Simple System Architecture

To Wireless Network

WZ_MicoSAC31

Wired IOBUS

WZ_ZCOORD

Architecture in the Building Space

Each wireless controller communicates with its assigned WZ_MicroSAC31 via the ZIGBEE wireless network. The radio in each controller “joins” the wireless network and also routes packets to and from other radios in the network.

The Zigbee Mesh Network is a Self-Healing dynamic wireless protocol which finds and maintains a path (route) to the destination. If the route becomes obstructed, an alternate route is quickly discovered.

Controllers decode only packets destined for themselves.Time information is transmitted globally to all controllers.

Strength and Reliability

In a Walker Wireless system each controller acts as a transmitter and router of information.

Main Control Box

Strength and Reliability

Self-Healing - If a controller looses communication, or there is an obstruction, the mesh network will automatically find a new route for the data.

Main Control Box

The Zigbee Radios

The standard radios installed in all Walker Wireless products operate at 2.4GHz and allow for up to 30 meters (unobstructed) between devices. In testing, the radios communicate at 100% signal within 20 meters between radios on the same floor and 6 meters (2 floors) vertically in a concrete/steel building.

Greater Distances:

High Power Radios. If needed, High Power radios can replace the standard radios within Walker Wireless controllers at a minimal cost. These may be an option in situations where there is strong interference or large distances between controllers.

Repeaters. Where there is a great distance between buildings, and there are no controllers nearby, low cost repeaters can be added to bridge communications.

The built in motion detector in each Walker Wireless controller allows the system to turn down the Setpoint when no motion is detected in the zone. The motion detector has a range of 10 meters at a viewing angle of 150 degrees. In situations where motion does not always mean occupancy (zones with animals or street facing windows) the motion sensitivity can be adjusted or disabled.

Motion Detector

Network architecture and wireless communication removes the need for distributing control system physically throughout the facility. All control panels can be mounted in a single location.Stand alone unitary programming in each device minimizes or removes GCL programming time.All unitary controllers operate stand alone in case of loss of wireless communicationsFull duplex communication used between SAC and remote units guarantees data gets passed with feedback confirmation where required.Each external controller passes values, status and runtime information back to its host MicroSAC on a regular basis – usually every 30 seconds. The host MicroSAC sends supervisory data at roughly the same rate.Where required, packet communication frequency can be increased by adjustment in the wireless controller and GCL.

Wireless Advantages

Degree day calculations for any area quickly show your Customer expected savings that can be achieved with an aggressive turn down strategy.Accurate measurement and control ensure your ability to maintain any setpoint at minimum cost and impress new Customers with a more come comfortable environment.Real time usage calculations allow you to show your Customers his savings after a few months and in a concise manner.Product offering is unique in many new and untapped marketplaces where DDC was previously too expensive.Malls, Smaller Hotels and Motels, Aircraft hangers, private homes and small offices are among several new target audiences.Installation is hassle free – just involves changing the thermostats in many cases. Does not need to interfere with current occupants.Strategies for Hydronic buildings ensure maximum tenant comfort on all floors while saving energy.

Wireless Marketing Advantages

Uses a IEEE 802.15.4 wireless network with a ZIGBEE layer on top which includes Mesh Networking, Security, and Applications control. Allows up to 300 wireless devices to be connected per ZIGBEE network. If more than 300 wireless controllers are needed, then 2 or more networks can co-exist, each with up to 300 devices.Full network and controller diagnostics lets you see the status of all wireless communication, and identify and correct any communication issues.Low cost repeaters or higher powered radios can easily be used to bridge any wireless communication gaps.Network routing and other information is stored in EEPROM so the network recovers instantly after a power failure.

How Zigbee Wireless Works

Communication DiagnosticsFigure shows last transmit times in minutes in left hand column.Note that LVS_20 shows 7 minutes since last transmission indicating a poor link. This high powered radio link is mounted on the outside of a building and is currently under 10 feet of snow. The distance to the next link is about 500 feet.

LVS20This link connects sporadically every 10 or 15 minutes, but still results in correct operation. Rather than digging it out or relocating, Walker is using the poor link to tune the operation of controls when wireless commands are sporadic.LVS15This controller is disconnected and shows 240 minutes (at least) since last transmission. Communication alarms can be generated based on time since last transmission

Wireless (WZ) Product Line-up

LEGEND – see next pageAll Easy-Stat strategies are available – Custom if required

Wireless (WZ) Product Line-up

T

Temperature

K Knob

M Motion

D Digital

U Universal

H

Heat

C

Cool

L

LCD

LEGEND

All Easy-Stat strategies are available – Custom if required

A large number of strategies have been developed for the Easy-STAT product line over the last several years. They are posted on our Web site and can be downloaded to the controllers with an inexpensive dongle.These applications are unitary, but can be modified easily with Walker’s Easy-STAT tool and with many adjustable features.All strategies can be converted for use with the Wireless product line if requested.

Cindy Lee at Walker is our applications expert for EasySTAT and WZ products – please contact her for any discussion.

Heating/Cooling Fan Coil Control Heat PumpRadiation Control Multiple zones VAV controlVVT strategies Rooftop control AHU / EconomizerLighting Control Pressure Humidity Duty-cycle

EasySTAT Algorithms can be converted for Wireless use

At Lawson Mall (135 WZ_ROOFPTAC’S), a number of global commands are calculated in the main panel (in this case PA101). These are transmitted regularly to all panels. Typically, the GCL required per zone is just to map those global values.

Typical GCL required per zone

The Wireless Demo contains one of each wireless controller complete with setup guides, marketing documentation and 4 hours over the phone or in site training.The databases for several installed sites are also available along with Demo access to the Mt. Washington site mock-up at Walker’s shop.The demo controllers are set up for “plug and play”.

Wireless Demo Kit

WZ_MicroSAC31WZ_ZCOORDWZ_LVS250WZ_STAT25WZ_ROOFPTACWZ_ROOMPTACW_RTUCONNECT_IMS

Wireless Installations

Mount Washington Community Wireless Installation.

On Mt. Washington in Courtenay BC, many Chalets have installed Walker Wireless. In our first “Community Network”.. Building owners in this environment are seeing up to 70% energy savings. Deep snow, distances between chalets and high interference put wireless communications to the test with excellent results.

Mall at Lawson Heights Saskatoon, Canada

The Mall at Lawson Heights has 135 rooftop units that had poor control , no central control system, and no setback strategy.The estimated savings – (up to 50%) are expected to result in a payback of less that one year.

Best Western hotel and Convention Center, Courtenay is now appreciating more comfort and reduced costs with a Walker Wireless system recently installed and is looking forward to further expansions being installed later this year.Installation is proceeding, working around a busy operational schedule for the Hotel with no “down time” allowed.

Westerly Hotel and Convention Center, Courtenay B.C.

The Courtenay RCMP Detachment will begin to appreciate maximum energy efficiency with their Walker Wireless/Heat Pump system currently being installed.In this system, maintenance mangers like the idea that if they were to relocate, the controls are easily disconnected and transferred to a new location.

Courtenay RCMP Detachment, Courtenay B.C.

Air Canada will save energy with Walker controls in their hanger at YVR. Existing, stand-alone Easy-STAT controllers are being replaced by their wireless equivalents.In March, Walker representatives went to the hanger to determine possible interferences within the structure. Tests confirmed radio communication will be strong through metal firewalls and several concrete floors without the use of repeaters or high powered radios.

Air Canada hanger Vancouver B.C.

Why Choose Walker Wireless

Saving up to 40% or more on your heating/cooling bills gives a short return on investment while reducing your carbon footprint.

Your heating or cooling is automatically adjusted based on room occupancy.

Leading edge Wireless technology allows for non-invasive set up and dramatic cost savings on the initial installation.

Individualized software gives you complete control of your building from anywhere in the world, with continuous and accurate tracking of heating expenses.

www.Walkersys.com/wirelessystems.html