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- PSH500A – Enclosed Power Supply from Functional Devices ow.ly/EGEwE 6 days ago
- Blog: #Lighting And #HVAC Controls #Integration wp.me/p2H5ZC-ny 1 week ago
In many buildings, HVAC and lighting are separate systems, but it doesn’t need to be that way. In fact, lighting and HVAC systems integration is an excellent way for facility managers to improve their building’s performance and comfort. The integration can decrease a facility’s energy consumption and environmental footprint.
Today’s Facility Manager recently published an article about integrating lighting and HVAC controls and suggest starting the process with an energy audit. The article mentions that audits can help reveal places to decrease energy consumption through lighting technology upgrades (i.e., replacing older technology lighting fixtures, ballasts, and lamps with LED technologies). We recently upgraded inside and outside lighting here at CCI, and will blogging about it soon!
Read TFM’s article Benefits Of Integrating Lighting And HVAC Controls.
If you are interested in learning more about integrating lighting controls into your BAS, contact CCI. You can also check out our blog post from a few weeks ago about Blue Ridge Technologies and their lighting controls solutions.
Functional Devices makes an enclosed 500VA power supply with five 100VA Class 2 Outputs (480/277/240/120 Vac to 24 Vac) – it’s the PSH500A. There’s also an open style 500VA power supply – it’s the PSMN500A.
Functional Devices recently prepared a white paper (pdf) on the PSH500A enclosed power supply. It’s a fantastic resource filled with detailed information about the PSH500A. It explains that this prepackaged solution can be used for the following applications:
• Providing distributed power to Variable Air Volume (VAV) controllers
• Providing distributed power to various control panels
• Providing distributed power to controllers in critical controlled environments
It also covers the PSH500A-LVC – a version of the PSH500A that has a low-voltage wiring compartment. The PSH500A-LVC power supply isolates the high-voltage compartment and the low-voltage compartment to prevent possible electrical hazard, eliminating the need for Personal Protective Equipment (PPE) when dealing with control power.
Register today to reserve your seat in a free Belimo 101 Training on air damper actuators and control valves. CCI will be hosting the training here in our training facility in the Boston area on October 29, 2014.
Students attending this training:
- take part in a hands-on mounting and wiring lab,
- learn how to size air damper actuators and control valves,
- receive advice straight from the experts – the Belimo training team.
Specific topics covered during the Belimo 101 Training include:
- How to size an actuator based on damper torque requirements
- The differences between spring return and non-spring return actuators
- The control signals commonly used today in commercial HVAC
- How to select control signals based upon application
- How to identify the features and properties of Belimo actuators from the model number
- How to mount and wire spring and non-spring return actuators
- Basic troubleshooting on the mounting and wiring of Belimo actuators
- The programming options available on Belimo Multi Function Technology (MFT) products
- The key differences between 2-way and 3-way valves
- The difference between mixing and diverting valves
- How to calculate the required Cv rating for a valve from GPM and ?P over the valve
- What the different valve flow characteristics mean
- Where to find information pertaining to valve limitations using Belimo resources
- How to identify valves by type (i.e. ball valve, globe valve etc.)
- How the Belimo pressure independent valve (PICCV) works
- The purpose of the lights and switches within the NV actuator and how to respond to these signals
The challenge with monitoring variable frequency drives (VFDs) is the necessity to monitor both amperage and frequency ensure the drive is operating normally. To monitor this ratio, a current sensor must learn the VFD curve and
alarm the controller when the relationship is outside the normal operating range. VFD current sensors are installed on the load side of the variable frequency drive and use a microprocessor to set the proper threshold. The sensor will
detect motor undercurrent conditions such as belt loss, coupling shear, and mechanical failure on fans and pumps.
How is the current sensor trip point calibrated for VFDs?
In order to detect belt loss/coupling shear on variable frequency drives, the current sensor trip point is set by a microprocessor that establishes a proper threshold between current and frequency at one or multiple frequency
bands. The current sensor then alarms the controller with a change in state when the ratio between amperage and hertz is outside of the learned load, indicating belt loss or other mechanical failure. So, how does a technician calibrate a current sensor to monitor mechanical failure on a VFD? Some VFD current sensors require manual calibration from a field technician by running the VFD at different bands for 2 minutes each, taking a minimum of 10 minutes per sensor to install. To save time and money on install, a Senva VFD current sensor self-calibrates in 10 seconds of the VFD operating above 50Hz.
Selecting the correct VFD current sensor
The biggest constraint when working with VFD sensors is ensuring the VFD will be operating within the amperage requirements. Standard VFD current sensors require a minimum of 3.5amps on the lowest frequency. Most issues stem from having insufficient amperage to power the microprocessor in the current sensor. For example, for a Senva C-2350VFD current sensor, if the minimum amperage is not present in the 20Hz range, the sensor will not operate properly. The options at this point are to wrap the wire to double the current present, or to select a VFD current sensor that can operate with a lower amperage range, such as Senva’s C-2350VFD-L (0.5-15 A range).
Need help calculating the amperage for your specific VFD? Use Senva’s motor amperage calculator.
Honeywell’s characterized control ball valves feature a parabolic flow insert that’s integral to the ball. Its unique construction enables a smoother flow curve and greater degree of rotation responsiveness. The result: more accurate flow rate with less wear and tear. Honeywell has simplified the ball valve selection process, too. Their control ball valves use the same actuator mounting bracket for all 1⁄2″ – 3″ valves, whether spring or non-spring return actuators. And, Honeywell’s Cv ratings are similar to globe valve Cv ratings, making it easier to design your system using a ball valve.
CCI assembles Honeywell VBN Ball Valves and MVN Actuator in our warehouse. We carry the components necessary to assemble 100’s of modulating, floating, or two position 1/2″ through 1 1/4″ 2-way and 3-way characterized ball valves. Whether you need one or 1,000 – you’ll receive your actuators and valves quickly and conveniently.We provide same-day shipping for orders received by 1:00pm ET.
Visit our online store or call CCI at 781-335-8353 to place an order.
DGLux’s Project Assist is a “drag and drop” wizard that can be used to design and develop a data-driven applications. It helps you create a graphic interface for your building data – and you don’t need programming or design skills to use it. It’s made up of four main menu components that walk you through the design and development experience.
- Project Navigation
- Manage Templates
- Style Manager
- Launch Viewer
Project Assist is simple and manageable – see how it works in this video.