The document provides information about the Industrial Refrigeration Users & Research Industry Association (IIAR). It discusses that IIAR is a membership-based technical society for natural refrigerants that develops ANSI standards and provides educational resources. It lists IIAR's current suite of ANSI standards for ammonia refrigeration systems and standards that are under development for carbon dioxide and natural hydrocarbon refrigeration. It provides background on the development of IIAR's draft CO2 refrigeration standard, including the demand from industry for such a standard, the pre-public review comment process, and the upcoming public review period.

1. Eric M. Smith, P.E. – Vice President
and Technical Director, IIAR

2. Who We are and What We Do
➢ Membership Based Technical Society for
Natural Refrigerants
➢ ANSI Approved Standards Developer
➢ Publisher of Technical and Educational
Resource Material
➢ Comprised of design engineers,
contractors, manufacturers, end users,
students, scientists, and trainers

3. 48th Annual Conference
Online Certificate
Programs

4. Industrial
Systems:
What They
Look Like

5. Commercial
Systems:
What They
Look Like

6. IIAR 1 – 2017: Definitions and Terminology Used in IIAR Standards
IIAR 2 – 2014: Safe Design of Closed-Circuit Ammonia Refrigeration Systems.
IIAR 3 – 2017: Ammonia Refrigeration Valves
IIAR 4 – 2015: Installation of Closed-Circuit Ammonia Refrigeration Systems
IIAR 5 – 2013: Start-up and Commissioning of Closed-Circuit
Ammonia Refrigeration Systems
IIAR 6 – 2019: Inspection, Testing and Maintenance of Closed-Circuit
Ammonia Refrigeration Systems
IIAR 7 – 2019: Developing Operating Procedures for Closed-Circuit Ammonia
Mechanical Refrigerating Systems
IIAR 8 – 2015: Decommissioning of Closed-Circuit Ammonia Refrigeration
Systems
IIAR Suite of Standards
Approved ANSI Standards

7. IIAR Suite of Standards
Under development
IIAR 9 – 20xx: Working Title:
Application of Recognized and Generally Accepted Good Engineering Practices for
Closed-Circuit Ammonia Refrigeration Systems
IIAR C2 – 20xx: Working Title: CO2 Refrigeration
IIAR H2 – 20xx: Working Title: Natural Hydrocarbons Refrigeration

8. IIAR Members 1st to use CO2 in Modern Era
• Greater Efficiency at very low temperatures in Industrial
• Reduction of Ammonia Charge, use as a volatile brine
• 1st Guideline Published
The Worldwide Push for Low GWP Alternatives Grew
• Both Industrial and Commercial Applications
• Designers and Manufacturers Requested more Information
IIAR Seminars - Well Attended and Produced Observations
• Comments Received that CO2 Design Information was
minimal
• Big Question: Was ASHRAE 15 Adequate?
• Nothing for Installation, Operation, Maintenance
BSR/IIAR CO2-20xx – Intro

9. BSR/IIAR CO2-20xx – Intro
More Observations:
• Most Experience was in “Freon” or Ammonia Systems
• Standard would Ease the Transition
Demand for a Standard
• End-User, Manufacturer and Designer Requests for Development
• IIAR Experience in ANSI Standards Development
• Quick and Efficient, Dedicated Staff, Nimble Committees
• Fair and Open
• Promoter of Natural Refrigerant Use for Reliability, Efficiency

10. BSR/IIAR CO2-20xx – Intro
Why a Standard?
• Consistency in Design
• Basic Minimum Level of Quality
• Protection of Owners’ Investments
• Safety of End-Users and Technicians
And Then What?
• Commentary, Outreach from End Users, Manufacturers and Designers
Persuaded IIAR BOD to Embrace the Idea and Dedicate Resources
• Standards Development is Hard, and Never Done
• Consensus Required
• New Technology and Experience
• Revision is Normal

11. BSR/IIAR CO2-20xx
Safety Standard for Carbon Dioxide Closed-Circuit
Refrigeration Systems
PURPOSE: Specify minimum requirements:
• Safe Design
• Safe Installation
• Start-up
• Inspection, Testing, & Maintenance
ANSI Project Initiation Notification (PIN) submitted
and ANSI acknowledgement received

12. BSR/IIAR CO2-20xx
Pre-Public Review Comment Samples
Sample 5:
• 10.5.1.2 For CO2 transcritical systems, all highside
valves shall contain 1500 psig (10,3402 kPa gauge;
100103.4 Bar gauge) over the temperature range
-60°F (-51.1 °C) through 240 °F (115.6 °C).
Not all valves in a transcritical system need to be rated at such high
pressures, only highside valves exposed to those pressures. Design
working pressures are addressed in other portions of the standard, if
a minimum valve pressure design standard is desired, requiring 1500
psig anywhere other than the highside would drive unnecessary
additional costs in the system.

13. BSR/IIAR CO2-20xx
Public Review – Initial (1st)
• “Public Review #1 Draft” full document:
✓ About 160 Comments Received
✓ Each Comment to be Addressed
✓ Draft to be Prepared for next Public Review

14. Final Approvals
✓ Consensus Body (CB) Reviews & Votes
• Standard Content
• ANSI Process was met
✓ Standards Committee (SC) Reviews & Votes
• Standard Content
• Submit Request to IIAR Board of Directors
✓ IIAR Board of Directors (BOD) Votes
• Approve for Publication
✓ ANSI Board of Standards Review (BSR)
• Reviews & Approves as ANSI Standard
➢ Publish Standard

15. IIAR Members Familiar with Large Scale Propane Systems
• Used in industrial applications
• Used in some “appliance-type” refrigeration systems
• Used as high side refrigeration for cascade systems
IIAR Natural Hydrocarbon Standard Scope & Purpose
• Augment existing design standards
• Will NOT cover listed equipment
• Will include design, operation, inspection, testing and
maintenance
• Applicable mainly for industrial and indirect commercial
systems
BSR/IIAR H2-20xx – Intro