Don’t question commissioning when it comes to lighting controls

Commissioning and testing are as critical for lighting controls as they are for building management systems.

11/16/2011


Pop Quiz: What is the biggest heat load in a building that we can control? If you guessed lighting, you’re absolutely correct. To justify lighting controls as a value investment for a property, it’s crucial that lighting controls systems are calibrated, adjusted, programmed, and…

Can you guess the next word? If you said “commissioned,” you’re correct again!

Lighting controls are one of the last pieces installed in any building and the last to get programmed and commissioned. Many times the start-up and commissioning process can be rushed, leaving the lighting controls system and components in a functional but not optimal operation. The recently published ASHRAE 90.1-2010 energy code will require a third party to perform functional testing of the lighting controls to verify the performance meets or exceeds all documented performance criteria. This energy code is likely to be adopted quickly by state regulated energy codes and green initiative design criteria.

Functional testing and follow-up after start-up and commissioning are performed help ensure the designed energy savings are realized. If you’re nearing project completion, persuading the owner to adopt this practice will mean he’ll enjoy a return on investment on current projects rather than waiting for future renovations or new construction. Skipping the start-up and commission, however, can lead to an underperforming system, unused features, and a loss of energy savings.

After all, like many other moving parts in the MEP/FP discipline, you can’t just “build it and walk away,” expecting the system to function efficiently. Commissioning and testing are as critical for lighting controls as they are for building management systems.

Why you should never question commissioning

Most lighting controls equipment available today requires careful tuning once installed and should be tuned up again after installation. From the simplest stand-alone occupancy sensor to the most elaborate building-wide control system, all need some calibration. In a recent product discussion with an occupancy sensor manufacturer, we were informed that sensors have an automatic learning feature that takes about 1 to 2 weeks to capture the use of a room. “Auto-commissioning” sounds great, but there is a catch: if sensors are functioning prior to the final user occupancy, then the sensors will learn the wrong behavior. This causes the sensors to take even longer to adjust, leading to final user frustration, a fixed override of the system, and taking the sensors out of commission. By resetting the occupancy sensors just before the user arrives to the space, a normal cycle of auto learning can be achieved. Tiny nuances such as this example will be slightly different for every manufacturer, but one thing is for certain: it’s critical to have a trained professional involved in the final project start-up and programming to ensure the system is working at its highest level.

We typically design buildings for facilities with a long lifecycle and want all of the initial investments to pay back as they are designed. The energy savings gained by a fully functioning lighting controls system pays back so quickly that the start-up and commissioning should never be questioned. The additional expense of start-up and commissioning of lighting controls is only 6% to 7%, which is worth every penny when it allows 7%-13% of yearly energy cost savings. See the case study in the sidebar, comparing two buildings’ performance over one year and the money lost by not implementing a control method as simple as an automatic time schedule.

 

 

Figure 1: The lighting controls cost comparison illustrates that owners should get what they pay for—and accountability can help. Courtesy: Primera Engineers Ltd.

The question of responsibility

Whose responsibility is it to connect the owner, manufacturer, and commissioning agent? One could argue two sides of this coin. First, the owner should always make sure he is getting what he paid for by following up and asking questions. But sometimes owners are not aware of the resources available. They are accustomed to calling a local electrician who might not be familiar with one of the 10 different lighting controls manufacturers whose products could have been installed. At this stage, the owner likely needs the quickest solution to make the system or space function. Often times this means disabling the controls to make the space ready and usable immediately. In reality we should reconnect our contractors, manufacturer field technicians, and installers with the end user. Following up on the system performance and holding all parties to the construction specifications is in the best interest of the owner. The systems should function as designed, allowing the owner to get what he paid for: to save energy and earn some return on the investment.

Given the two examples of cost savings in the sidebar, it is evident that commissioning lighting controls can generate a very quick payback when systems are designed effectively. The practice of third-party functional testing for lighting controls outlined in ASHRAE 90.1-2010 should be adopted now. As lighting controls become more complex in response to tighter energy regulations, the added cost of controls can only be justified to an end user by the energy savings generated when the system works optimally.

Fimek is an award-winning lighting designer at Primera Engineers Ltd. She is Lighting Certified by the NCQLP and is well versed in lighting calculation and rendering software.

Helpful links:

 

Advanced Lighting Guidelines 

ComCheck 

eLADwiki 

IECC Codes 

Lighting Controls Assn.

National Lighting Bureau 

Status of Energy Codes

U.S. Green Building Council 



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Your leaks start here: Take a disciplined approach with your hydraulic system; U.S. presence at Hannover Messe a rousing success
Hannover Messe 2016: Taking hold of the future - Partner Country status spotlights U.S. manufacturing; Honoring manufacturing excellence: The 2015 Product of the Year Winners
Inside IIoT: How technology, strategy can improve your operation; Dry media or web scrubber?; Six steps to design a PM program
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
Warehouse winter comfort: The HTHV solution; Cooling with natural gas; Plastics industry booming
Managing automation upgrades, retrofits; Making technical, business sense; Ensuring network cyber security
Designing generator systems; Using online commissioning tools; Selective coordination best practices

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
This article collection contains several articles on the vital role that compressed air plays in manufacturing plants.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
This article collection contains several articles on strategic maintenance and understanding all the parts of your plant.
click me