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Motors & Drives

Improve Pump Operations with VFD Network Multiplexing

From setting up node addresses to the nuances of lead and lag pump operation, explore the opportunities for tailored, more efficient performance and increased redundancy.
Single VFDs are often integrated into new and existing applications due to the huge amount of energy savings and programming benefits.
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BUILDING AUTOMATION

Impact Of ASHRAE 90.1 On Controls And BAS Design

As states adopt more stringent energy codes, here is what you need to know.
In an effort to improve energy efficiency for commercial buildings, ASHRAE, IES, ANSI, and the DOE have been working diligently to increase the stringency of state energy codes.
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Motor Selection HVAC Design

Who actually specified that motor? Did they keep the entire system in mind or were they simply specifying one component at a time? And will that spec require over-speeding the motor?
Often, an HVAC system is designed by the selection of individual components and not by a whole-system approach
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VFD Serial Communications: Which Points Should I Use And Why?

The available LEED credits and most obvious energy-saving possibilities are one thing. The potential for a ripple effect of system-wide savings by deploying VFDs as part of better overall monitoring are another.
Variable frequency drives (VFDs) have become omnipresent in the building automation world.
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Bridging Schools And Eras with HVAC

With literal and figurative tight spaces handled, now new boilers, hydronics, pumping systems, and DDC all work together to impress and serve.
In today’s world, so-called “high-performance, sustainable” facilities are a dime a dozen. But many of these buildings rely on overly complex mechanical systems to carry out their mission.
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Good Practices For Mechanical Repair Of Electric Motors

Motor problem documentation, grease compatability, fits for bearings … these are just three aspects covered in ANSI/EASA AR100. Whether you maintain your own motors or simply own them and require proper maintenance, understanding the concerns, resources, and recommendations of AR100 will encourage proper repairs and longer service life.


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Critical Care: IAQ For Isolation

There’s nothing simple about the design, construction, and maintenance of a hospital’s protective environment and airborne infection isolation spaces. However, if you pay careful attention to recommended ventilation and filtration strategies for the rooms and adjacent areas, you can handle the pressure (so to speak) and deliver a healing environment.


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Motors & Drives Rebate Update

How often do you get paid to save money through improved system performance? Utilities have their own reasons for seeing you lower your bills, so don’t get started on that next retrofit until you’re sure your organization isn’t leaving money on the table.
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Motors For Use With VFDs

The questions can pile up quickly when it’s time to specify a motor to pair with a variable drive. The information available sometimes leaves one wondering just as much about the information that is unavailable. Will a decision hold up not only in the actual application but also possibly in court? Wade into compatibility, spec terms, partial loads, and more as we try to get this motor running.
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Calculating Life-Cycle Cost

Detailed calculations can unearth hidden savings.
Whether at work or in our personal lives, we all try to be smart shoppers. We’ll go that extra mile to save a few percent on upfront purchase costs but every so often miss the big picture by not taking total cost of ownership (TCO) into account.
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2014 December

Check out the December 2014 issue of Engineered Systems.
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