Energy Savings Using Wireless Products

Energy savings in a building is beneficial to the environment and the wallet. In addition, many jurisdictions have requirements for energy-saving controls to meet building codes. The main targets for energy savings in a building are HVAC and Lighting.

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Functional Devices, Inc. manufactures EnOcean, wireless products that can make these energy-saving applications a reality. These wireless products can offer a lower entry cost than a wired solution, since a substantial portion of the cost for such projects is running power and signaling conductors. The following are common applications that we get requests and technical support questions about.

Occupancy Based Lighting Control

Problem: Leaving lights on in an unoccupied office or meeting room can be a big waste of electricity. No one remembers to turn them off every time.

Solution: Our EnOcean wireless Lighting products can pair with an occupancy sensor to control lighting in two different modes.

The first mode, Auto ON, allows control of the lighting by the sensor alone. When occupancy detection occurs, the lighting load turns ON and remains ON until thirty minutes after the last motion detection. The other mode, Manual ON-Auto OFF, allows a wireless rocker switch to also link to the control device. In this mode, the rocker switch can control the ON/OFF function of the light load. The occupancy sensor will turn the lighting load OFF thirty minutes after the last motion detection. The table below lists our EnOcean wireless lighting products that work for the above application. The EnOcean Equipment Profiles (EEP) are in the last column of the table.

Functional Devices, Inc. Wireless Lighting Products

902 MHz ModelDescriptionPower InputContact Rating (Amps)Transmission SourceEEP
FDLR20AWireless Relay24 Vac/dc20TransceiverA5-30-02
FDLR20BWireless Relay120 Vac20TransceiverA5-30-02
FDLR20CWireless Relay208 Vac20TransceiverA5-30-02
FDLR20DWireless Relay240 Vac20TransceiverA5-30-02
FDLR20EWireless Relay277 Vac20TransceiverA5-30-02
FDLR05BWireless Relay120 Vac5ReceiverA5-30-02
FDLR05FWireless Relay208-277 Vac5ReceiverA5-30-02
FDLTS2Wireless Rocker SwitchKineticN/ATransmitterF6-02-02
FDLTVCWireless Occupancy Sensor – Ceiling MountSolarN/ATransmitterA5-07-01
FDLTVWWireless Occupancy Sensor – Wall MountSolarN/ATransmitterA5-07-01

Controlling Hotel Room HVAC

Problem: Another application that I am receiving more frequent inquiries about is hotel room energy management. The concern is that a guest would unknowingly leave a hotel room window or patio door open while the HVAC is running and leave the room. This would, at the least, waste energy, and at the worst, potentially damage the HVAC system.

Solution: Fortunately, we have a solution using an EnOcean enabled RIB® relay and one or more wireless door/window sensors (WDWS2-EN3). When linked with any of our EnOcean relay devices, the door/window sensor sends a CLOSE command when the window or door closes and an OPEN command when the window or door opens.

This application can also utilize our product’s Alarm Mode and/or Delay Mode. The Alarm Mode allows multiple sensors to control one device. In this mode, all linked sensors would need to send a CLOSE command for the load to turn ON. The delay mode adds a ten second delay before the relay will turn ON and a ninety second delay before the relay will turn OFF. The ninety second delay allows door/window sensors to temporarily open and close without affecting the load, and it will prevent the HVAC unit from short cycling. The image below shows a hotel room utilizing our EnOcean products for maximum energy savings.

Hotel Room Energy Savings Applications RIB EnOcean products
Hotel Room Energy Savings Applications

Controlling Hotel Room Lighting

Problem: Another waste of energy in a hotel room is lights left on when the room is unoccupied.

Solution: To prevent this, use a keycard switch, like our WKC-EN3, in the room instead of a traditional light switch.

The keycard switch links to one of our EnOcean relays controlling the room lighting and paired in Momentary mode. With this setup, the patron’s hotel room keycard would have to insert into the keycard switch for the lights to turn ON. Upon removal of the keycard, as the patron exits, the lighting would turn OFF. The table below shows our EnOcean wireless products used in the two previous applications.

Functional Devices, Inc. Wireless BAS Products

902 MHz ModelDescriptionPower InputContact Rating (Amps)Transmission SourceEEP
RIBW24B-EN3Wireless Relay24 Vac/dc20TransceiverA5-30-02
RIBW01B-EN3Wireless Relay120 Vac20TransceiverA5-30-02
RIBW208B-EN3Wireless Relay208 Vac20TransceiverA5-30-02
RIBW240B-EN3Wireless Relay240 Vac20TransceiverA5-30-02
RIBW277B-EN3Wireless Relay277 Vac20TransceiverA5-30-02
RIBW01C-EN3Wireless Relay120 Vac5ReceiverA5-30-02
RIBW02C-EN3Wireless Relay208-277 Vac5ReceiverA5-30-02
WDWS2-EN3Wireless Window/Door SensorNoneN/ATransmitterD5-00-01
WWS2-EN3Wireless Rocker SwitchNoneN/ATransmitterF6-02-02
WKC-EN3Wireless Keycard SwitchNoneN/ATransmitterF6-04-01

If you are interested in learning more about these applications or products, review the Application Manual available on our website, or call or email our technical support team.

Henry Smith
Henry Smith

Henry Smith is the Product Design Manager at Functional Devices, Inc. He has a BS in EET obtained from Purdue University in 2014 and a lifelong interest in electronics. As an engineer at Functional Devices, he gets to provide Technical Support to our customers, from distributors to specifying engineers and installers.

Henry enjoys providing tech support, as it allows our company to assist at every level of our product’s lifecycle and exposes us to interesting and unique applications. While not every technical question is unique, even answering a simple question or providing someone with the information in a timely manner can go a long way to helping them meet a deadline.

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