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You Might Need Commissioning If... Presented to the Illinois Chapter ASHRAE Tuesday, March 9, 2010 By Jeff Watson, CCP, CEM Director, Technical Services Aaramark

You Might Need Commissioning if

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Presentation by Jeff Watson, CCP, CEM, Director of Technical Services, Aramark

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Page 1: You Might Need Commissioning if

You Might Need Commissioning If...

Presented to the Illinois Chapter ASHRAETuesday, March 9, 2010

By Jeff Watson, CCP, CEMDirector, Technical Services

Aaramark

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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…

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� – 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

You might need Commissioning if…

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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

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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

You might need Commissioning if…

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You Might Need Commissioning If... – �

Discharge Air Supply Duct

You might need Commissioning if…

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

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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.

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Mystery Electrical Problems

You might need Commissioning if…

Mystery Electrical Problems

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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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You Might Need Commissioning If... – ��

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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You Might Need Commissioning If... – ��

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!

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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

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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.

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