True Analytics™ - Energy Savings, Comfort, and Operational Efficiency
Cellucci is a principal of Yorkland Controls, an automation controls
distributor in Canada. Yorkland Controls Ltd. began primarily as a
building controls and
automation distributor serving the market place for over 40years.
Recently, representing major control manufacturers such as Johnson
Controls , Honeywell, and KMC, Yorkland has expanded to provide a high
degree of value added product as well as integration services to the
marketplace. Working through qualified contractors, we facilitate
solutions by integrating, Automation, Access, CCTV and most recently,
Integrating Lighting Control
Manufacturers have released lighting control systems to allow control down to individual zones and even fixtures. These systems are BACnet and Niagara Framework “ready”.
Sinclair: What has developed in the Lighting Control Market place that allows the Automation Contractors to facilitate integrating lighting into Building Automation systems?
lighting control manufactures have come a long way from the days of
providing central lighting panels. At best these panels would control
larger “zones” providing on-off control with occupancy scheduling. A
few systems would allow Building Automation networking through a
proprietory network. But again, the only control would be turning the
lights OFF and ON with the occupancy schedule triggered by the
Manufacturers such as Crestron, Encelium and Wattstopper, for example, have released lighting control systems to allow control down to individual zones and even fixtures. These systems are BACnet and Niagara Framework “ready”.
Sinclair: Didn’t the Digital Addressable Lighting Interface (DALI) Systems from some manufacturers allow for control down to the zone or fixture level?
Cellucci: Yes, DALI did allow for such control, but there are advantages by using open communication protocols. First, DALI is a lighting communication standard not necessarily a communication protocol that could be easily, or cost effectively, integrated into new or existing automation systems. Second, many DALI control manufacturers are ballast manufacturers, forcing the use of manufacturer specific ballasts and lighting controls. These DALI ballasts are relatively expensive compared to generic modulating 0-10vdc ballasts. These ballasts allow for more flexible and lower cost use of lighting controls. Since the lighting controls are BACnet controlling 0-10dv ballasts, the automation contractor can cost effectively implement integrated control strategies, from one common user interface using BACnet engineering tools.
Sinclair: Do these integrating strategies always require the use of modulating ballasts?
necessarily. Ideally, modulating 0-10VDC ballasts would allow for more
sophisticated control and energy saving routines such as dimming
strategies, daylight harvesting , load shedding, and occupancy
scheduling down to the fixture level. However, when the budget or
the application doesn’t justify the use of these dimming strategies,
the use of communicating bi-level on-off control with smart occupancy
sensors can certainly provide zone control and substantial energy
savings. Studies have shown that most occupants can do with less
lighting. When dual or multi-mode mode manual light switches are
provided , most users would generally use the first-lower light level
setting. One button on the switch turns on says 50% of the lighting and
another turns on the remainder when required. Using a simple strategy
such as bi-level lighting with a manual on switch with automatic off
via occupancy sensors, can increase energy savings by as much as 70%.
Sinclair: Other than allowing the building automation contractors to implement lighting control integration from connectivity perspective, what are some of the other major advantages?
ready lighting controls, once they are networked, can bring visibility
of not only control to the entire facility, but allows for sharing of
common devices such as occupancy sensors, reducing the hardware costs
and allows for incremental energy savings. For example, sharing the
occupancy sensors between the lighting and HVAC systems can increase
energy savings by allowing the HVAC system temperature setpoints to
drift to a “stand-by” setpoint in unoccupied areas during normal
business hours. In the case of VAV box controllers, not only the
temperatures but even airflow can be reduced for demand control
Sinclair: How can integrated lighting controls benefit the Smart-Grid Initiative?
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