you might need commissioning if
DESCRIPTION
Presentation by Jeff Watson, CCP, CEM, Director of Technical Services, AramarkTRANSCRIPT
You Might Need Commissioning If...
Presented to the Illinois Chapter ASHRAETuesday, March 9, 2010
By Jeff Watson, CCP, CEMDirector, Technical Services
Aaramark
You Might Need Commissioning If... – �
Case Studies
Jeff Watson CCP - Immediate Past President Director Technical Services ARAMARK
You might need Commissioning if…
You might need Commissioning if…
� – You Might Need Commissioning If...
IAQ Nightmare
As Found Conditions due to Lack of clear direction
Bard Units w/OA damper always openDiffusers Dripping on students
Partially loaded roomsSolution
Modify damper setup
Chill Water System Design
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You Might Need Commissioning If... – �
Chill Water System Design
Application – Serving MuseumDesign Intent
100% redundant System42 degree chill water supply
Air handlers expected to de-humidify
Chill Water System Design
As Found Conditions Installed per CD’s
Chill Water Supply between 47-58Space Humidity between 65% - 82%
SolutionInstall automatic chiller isolation valves
Chill Water System Design
� – You Might Need Commissioning If...
You might need Commissioning if…
You might need Commissioning if…
FunctionalPerformanceVerification
FunctionalPerformanceVerification
Progress TowardDesign System
Turndown
$60,000 Impact
Exhaust System Unoccupied Airflow(90% higher than design)
150,000CFM
25%July2000
40%Sept.2000
30%Aug.2000
50%Nov.2000
55%Jan2001
120,000CFM
103,000CFM
89,000CFM
84,000CFM
82,000CFM
ExhaustFan Staging
1
150,000 cfm
2
3
4
5
6
78,000 cfm
Systemis unableto achieve
UnoccupiedMode
Settings
“Design”ExhaustAirflow(2 fans)
MeasuredExhaustAirflow(5 fans)
AllowedLeakage
Init
ial
Fin
al
Des
ign
Leakage Leakage
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Closed Loop Heating System
Closed Loop Heating System
Closed Loop Heating System
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Closed Loop Heating System
As Found Conditions due toIncomplete work by subcontractor
Closed loop system installed and started upChemicals delivered but not put into system
SolutionCompletely drain and flush system, install
dispersant and cleaner, and then final biocide treatment.
Discharge Air Supply Duct
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You Might Need Commissioning If... – �
Discharge Air Supply Duct
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Discharge Air Supply Duct
As Found Conditions issue was aCode clarification – access was providedFire damper access very limited creating an
unsafe maintenance access issueSolution
Install portholes on all four sides of duct
� – You Might Need Commissioning If...
Mystery Electrical Problems
Building occupied three months14 overhead projectors failed
Fire alarm panel failed 2 times requiring new control boards
Intercom system failed 2 times requiring new power supplies
Intermittent phone system failures
Mystery Electrical Problems
Mystery Electrical Problems
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Mystery Electrical Problems
As Found Conditions due toWork damaged by other trade and Incomplete work by subcontractor
Main service ground located under main parking lot.
Main building transformers had grounding conductor running through cabinet but not
terminated.
Mystery Electrical Problems
Mystery Electrical Problems
SolutionInstall new Main service ground
Bond grounding conductor at main building transformers.
�0 – You Might Need Commissioning If...
Mystery Electrical Problems
You might need Commissioning if…
Mystery Electrical Problems
You Might Need Commissioning If... – ��
Fire Safety Issue
Fire Safety Issue
As Found Conditions due toPoor coordination between trades
Smoke detector installed by electrical sub not realizing installation defeated fire damper
operation.Solution
Move smoke detector 6 inches.
Fire Safety Issue
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You might need Commissioning if…
Stuffy Office
Stuffy Office
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Stuffy Office Area
As Found Conditions due toUn-trained Maintenance staff
No one could explain why the cardboard was bolted down to the return air
transfer grill.Solution
Remove cardboard and duct tape and balance system.
Photo-electric Temperature Gauge
Family Slide Show
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Materials Storage
Point to Point Complete?
Sometimes closed equals open!
Materials Storage
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Hey Slim..are you sure the power is off to this fan?
What’s wrong with this picture
Can we upgrade to pressure treated wood?
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When did OSHA start requiring wire mesh gloves as standard PPE equipment?
You might not need Commissioning if…
On This Project!
You Might Need Commissioning If... – ��
Assumption = Perception Issue
Perception Issue
As Found Conditions due toPerceived incomplete work
Outside air damper not open when running on five different units
Controller not wired to powerPerceived solution
Wire 24 volts to controller and set up outside air damper
Assumption = Perception Issue
�� – You Might Need Commissioning If...
Perception Issue
True As Found ConditionOutside air dampers were not open when running
Controller was wired to powerDamper motor was failed on five units – casualties of
the missing ground example aboveTrue solution
Replace damper motor and set up outside air damper
Jeff [email protected]
678-492-5892
You might need Commissioning if…
You’re an Owner that wants to be confident that your building works…. when you move in!You’re an A/E that wants to make sure that the owners building meets your design intent.You’re a contractor that wants help managing the process of subcontracting technical trades and eliminating warranty calls.
�0 – You Might Need Commissioning If...