commissioning for the 2015 iecc code · why? a brief history. 1985 • rocky brings down the ussr...

Commissioning for the 2015 IECC Code

Lunch & Learn Presentation O’Connell Robertson - TEMA March 10, 2016

Learning Objectives

Impact of Statewide Change from IECC 2009 to IECC 2015

At the end of this program, participants will be able to:

• Better informed about the history

• Understand what is driving the need for commissioning (Cx)

– The buildings and systems affected

– What is required, what is voluntary

• Better determine best method for Cx procurement

• Believe!

Why? A brief history.

1982

Why? A brief history.

1982 • ASHRAE convened a committee

to Cx best practices

Why? A brief history.

1982 • ASHRAE convened a committee

to Cx best practices • ET released in summer

Why? A brief history.

1982 • ASHRAE convened a committee

to Cx best practices • ET released in summer • Rocky fights Mr. T

Why? A brief history.

1985 • Rocky brings down the USSR by

defeating Ivan Drago

Why? A brief history.

1985 • Rocky brings down the USSR by

defeating Ivan Drago 1986 • Reagan tells Gorbachev to tear

down the wall

Why? A brief history.

1985 • Rocky brings down the USSR by

defeating Ivan Drago 1986 • Reagan tells Gorbachev to tear

down the wall 1989 • Berlin wall comes down

Why? A brief history.

1985 • Rocky brings down the USSR by

defeating Ivan Drago 1986 • Reagan tells Gorbachev to tear

down the wall 1989 • Berlin wall comes down • You finally start to reconsider your

mullet

Why? A brief history.

1985 • Rocky brings down the USSR by

defeating Ivan Drago 1986 • Reagan tells Gorbachev to tear

down the wall 1989 • Berlin wall comes down • You finally start to reconsider your

mullet • ASHRAE publishes Guideline 0 –

The Commissioning Process

Why? A brief history.

• Guideline 0 – Discusses the process but not

specific systems – Encourages implementing Cx

at Pre-design – Guideline is written around

ensuring that the objectives laid out in the OPR are satisfied

– Cx continues into the occupancy period with surveys

Next stop: Code Implementation • Over next 20+ years other Cx guidelines by:

– AABC – ASHRAE 1.1 – GSA – NEBB – BCxA – ASHE

• In 2009 Cx is required: – LEED 2009 –

• Breaks Cx into mandated Fundamental (construction) & optional Enhanced (pre-design)

– ASHRAE 90.1 – 2010 • Cx of buildings over 50,000sf

– IECC 2012 – • Cx Required for Mech > 40T & Elec

– IECC 2015 – • Cx requirements expand to circ pumps

Why Energy Codes?

2009 IECC to 2015 IECC

• 2009 IECC – April 1, 2011

• 0.25” Thick

2009 IECC to 2015 IECC

• 2015 IECC – Nov. 1, 2016

• 0.45” Thick

2009 IECC to 2015 IECC

• Mechanical

– Min efficiency rise

– R5 to R6 indoor insulation

– Energy recovery on systems > 2500 cfm and >10% OA

• with smaller systems having higher allowable % OA

– Either waterside or airside economizers with few exceptions (DX<5T)

2009 IECC to 2015 IECC

• Controls

– 7-day programmable still allowed but additional features operations required not remotely accessible

– Economizer must be: 1.) fixed dry bulb, 2.) fixed enthalpy/dry bulb, or 3.) diff enthalpy and fixed dry bulb

– DCV for systems serving medium density (>25ppl/1000 SF) rooms over 500 SF

– CHW and HW loop temp resets.

– Variable speed pumping systems > 10HP

– Fans ≥ 7.5HP to vary speed. Low speed NMT 2/3 full speed.

2009 IECC to 2015 IECC

• Electrical

– Most spaces lights on occ sensor with few exceptions for emergency egress

– Increased daylighting responsive auto controls

• Additional Efficiency – Six additional efficiency or controls options for Mechanical and

Electrical (building must comply with 1)

• Plumbing – Circ pumps to be automatically shut off on temp and demand

2009 IECC to 2015 IECC

• Commissioning (New requirement as of 2012 IECC) – Required for buildings with cooling load over 40T – Similar to 2012 IECC but with circ pumps added

Why Cx?

• Systems are getting more complex

– More energy recovery

– More economizers

• Controls schemes are more complex

– Cannot get there on raw efficiency increases

– Want to deliver energy only as much and where needed

• Commissioning can ensure the building operates as intended

Next stop: Owner Implementation

Path 1: • Allow contractor to select

and mange – May be better option if

owner does not have manpower to support CxA efforts

– Required by code and likely to get minimum services

What is required?

• Registered professional provides evidence

• Cx HVAC (select systems only)

• TAB

• O&M

• Functional test lighting controls

• Sampling allowed for identical spaces

• Functional test circ pumps

Cx Payback in… New Buildings: 4.2 years Existing Buildings: 1.1 years

Next stop: Owner Implementation

Next stop: Owner Implementation

What not to expect when doing the minimum code required Cx. • Plan & spec review of milestone design submittals (SD, DD, %CD) • CxA support for writing OPR • Specifications tailored to project • Installation review(s) • Submittal review(s) • System trending • Re-commissioning through warranty • Continuous Commissioning Plan

Next stop: Owner Implementation Path 2: • Owner Provided and/or Selected.

– Can add additional requirements

– CxA acts as an owner advocate

– CxA better understands owner’s expectations

– Owner can make more informed contractor payments as job winds down

– Commissioning specifications better represent the work to be completed on the project

– O&M personnel may be better utilized

Who can commission?

• Registered professional or approved agency for Mech & Plumbing

• For lighting, the registered design professional must provide evidence that systems were tested.

Next stop: Code Implementation

Examples

• VAV boxes simultaneously auto-calibrating

• Causing AHU to shut down on high static pressure

• Critical care AHU in a hospital

Examples

• Relief fan operating on economizer mode

• Setpoint as designed too close to non-economizer mode setpoint

• PID loop not tuned correctly

Examples

Examples

Questions & Answers

Kyle Fisher, PE, CPMP: kfisher@oconnellrobertson.com 512.478.7286