Sustaining Together
Making Your BAS System Work for You
FM – Energy Management
Talking Points
 Background  Scheduling
 Timeline
 Alarm Management
 Equipment Warnings
Northrup Auditorium – Built 1928
FM – Energy Management
Background
Nils Hasselmo Hall –
Built 1996
Nils Hasselmo
President from 1988-1997
Known for commitment to
undergraduate education.
 220 Buildings
 24 million square feet
 $50 million annual utility budget
 900+ BACnet/IP controllers
 25,000+ field controllers
 BAS Systems
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Automated Logic
Honeywell
Johnson Controls
Siemens
Tridium
Trane
FM – Energy Management
Timeline
 Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
Jones Hall – Built 1901
Frederick Jones
1889, First Professor of Physics
Dean of College of Engineering
FM – Energy Management
Timeline
 Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
Phillips Wangensteen –
Built 1974
Owen Wangensteen
Chief of Surgery 1930-1967 at
UofM Med School – Pioneered
open heart surgery. Credited
with saving over 1,000,000 lives!
 2003 – 2005 – Emergence of native
BACnet DDC systems
FM – Energy Management
Change to BACnet
2004
FM – Energy Management
Change to BACnet
FM – Energy Management
Timeline
 Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
Pilsbury Hall
Built in 1889
 2003 – 2005 – Emergence of native
BACnet DDC systems
 2006 – 2011 – System Upgrades
John S. Pilsbury
8th Governor of Minnesota
from 1876-1882.
FM – Energy Management
System Upgrades
TCF Bank Stadium - 2009
Medical BioSci Bldg - 2009
Science Teaching & Student
Services - 2010
Translational Research - 2007
FM – Energy Management
System Upgrades
JCI
N2
Honeywell
C-bus
Trane
Legacy
Siemens
P1
FM – Energy Management
Timeline
 Pre-2003 – Proprietary DDC &
Legacy electro-pneumatic systems
Jones Hall – Built 1901
 2003 – 2005 – Emergence of native
BACnet DDC systems
 2006– 2011 – System Upgrades
 2012 – Present – Optimization
FM – Energy Management
Optimization
 2012 – 2013 – Optimization
Weisman Art Museum –
Built 1992
 Scheduling
 Alarm Management
 Equipment Warnings
Frederick Weisman
Philanthropist & art
collector. He donated $3
million dollars to the UofM
to establish this art
museum.
FM – Energy Management
Scheduling
Eddy Hall – Built 1881
Henry Eddy – Math professor,
Civil Engineer and dean of
college of engineering. Eddy Hall
is the oldest Building on campus.
 Over 1700 pieces of HVAC
equipment running on time
schedule.
 Weekly, we track scheduled hours
and compare them to actual
runtime. If there’s a delta, we
investigate.
 If you can’t shut the fans off,
consider reducing the static
pressure or slowing down the fan
by 10-15% over night.
FM – Energy Management
Scheduling
Schedule Variance Report
Looks for fans not running the
amount of hours they are
scheduled.
HP
~8%
VFD Speed
~70%
FM – Energy Management
Scheduling
 Over 1700 pieces of HVAC
equipment running on time
schedule.
 Weekly, we track scheduled hours
and compare them to actual
runtime. If there’s a delta, we
investigate.
 If you can’t shut the fans off,
consider reducing the static
pressure or slowing down the fan
by 10-15% over night.
FM – Energy Management
Scheduling
Fan Speed Reduction Schedules
Static Pressure Reset Schedule
Static Pressure Setpoint
Should see bell W
curves every day.
FM – Energy Management
Scheduling
Fan Speed Reduction Schedules
Static Pressure Reset Schedule
Static Pressure Setpoint
No bell W curve.
Flat-line.
FM – Energy Management
Scheduling
Fan Speed Reduction Schedules
Static Pressure Schedule
Eddy Hall – Built 1881
~80%
VFD Speed
~70%
Savings will
vary based on
the fan size,
but there will
be savings.
FM – Energy Management
Alarming
Smart Alarming
CRITICAL ALARMS
-Alarms that require immediate alert & action.
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
WARNING ALARMS
-Alarms that indicate maximum analog effort.
FM – Energy Management
Alarming
Smart Alarming
CRITICAL ALARMS
Donhowe Building –
Built 1924
-Alarms that require immediate alert & action.
Safety trips, command/status mismatches,
critical temperature limits, etc.
FM – Energy Management
Alarming
Smart Alarming
HVAC ALARMS
-Alarms that can be prioritized & backlogged.
Folwell Hall – Built 1906
Cost to build: $416,000
2012 cost to remodel:
$34,500,000
Unreliable points, setpoint drift, all room
temps deemed ‘non-critical’ spaces, other
points that do not require immediate dispatch.
FM – Energy Management
Alarming
Smart Alarming
HVAC ALARMS
SE Steam Plant
-Alarms that can be prioritized & backlogged.
Built in 1902
Provides steam to all
of Minneapolis
campus buildings.
High Alarm
Alarm Limit
Limit =
= 65˚
70˚
High
10˚ bracket
bracket
10˚
Discharge Air
Air Temp-Setpoint
Temp-Setpoint =
= 55˚
60˚
Discharge
Low Alarm
Alarm Limit
Limit =
= 45˚
50˚
Low
10 minute Alarm Delay
10-10 Rule!
FM – Energy Management
Alarming
Smart Alarming
HVAC ALARMS
Washington Ave. Bridge
-Alarms that can be prioritized & backlogged.
Pedestrian bridge will have
light rail trains running
across it in 2014.
High Alarm Limit = 1.3 in wc
Static Pressure Setpoint = 1.0 in wc
Low Alarm Limit = 0.7 in wc
0.3” bracket
FM – Energy Management
Alarming
Smart Alarming
WARNING ALARMS
Mariucci Arena
-Alarms that indicate maximum analog output effort.
Built in 1993 – Home of
Gopher Hockey
VFDs, VAV dampers, heating & cooling
valves that are at 100% command.
Reheat Valves not
working properly
Unattainable
airflow settings
Smart Alarming
FM – Energy Management
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
VFD at 100%
No Static
Pressure
Static Pressure
Alarm Limits
Smart Alarming
FM – Energy Management
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
~1000 cfm short of
setpoint.
VAV Damper is at
100%
Smart Alarming
FM – Energy Management
VFDs, VAV dampers, heating & cooling valves that are at 100% command.
Just Data!
FM – Energy Management
Alarming
Focus Lists
Using database queries on the alarm
database, alarm statistics can be pulled to
provide a targeted list of unhealthy
behaviors.
Heating valves should
not fully open 700-800
times per week during
July.
FM – Energy Management
Review
Consulting Firms
Moos Tower
Built in 1970 Costs
nearly $500K per
month to operate!
2003
Proprietary
Pneumatics
2011
Open Protocol
DDC Controls
Integrate
Optimize
FM – Energy Management
Continuous Commissioning
 Keep fans running at or below scheduled hours.
 Reduce fan speeds &/or widen setpoints for a few hours every
night.
 Only get alerted for really important critical alarms.
 Run reports to collect high frequency non-critical alarms & plan to
address a couple items per week.
 Keep track of analog outputs that are often at 100% effort.
FM – Energy Management
QUESTIONS ?