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ASHRAE STD 15 & 34

Safety Standard for Refrigeration Systems

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Organization: ASHRAE
Publication Date: 23 June 2017
Status: active
Page Count: 6
scope:

FOREWORD

Addendum b makes several relatively small changes to the standard.

• Removes a restriction on higher-flammability refrigerants where used in small, portable-unit systems. The use of higher-flammability refrigerants is restricted only by the total refrigerant charge in the self-contained system (limited to 0.331 lb [150 g] of Group A3 refrigerants).

• Defines "low-probability pumps" and provides requirements pertaining to their use. Recognition of low-probability pumps acknowledges the superior leak resistance of these pumps and encourages their use to increase safety. The approach is modeled after current allowances for low-probability systems. Because low-probability systems are inherently more resistant to atmospheric releases than high-probability systems, Standard 15 permits more widespread use of low-probability systems. With respect to pumps, experience has shown that pump leaks are typically associated with failed seals on rotating (dynamic) parts, which can result in events ranging from a simple nuisance release to a hazardous condition requiring an emergency response. This addendum encourages the use of liquid pumps that are hermetically sealed or similar in lieu of pumps that rely on dynamic seals to contain refrigerant. This change is consistent with the 2018 IMC (changes proposed) and with IIAR 2.

• Eliminates a requirement for industrial occupancies and refrigerated rooms pertaining to floor area per occupant While the requirement has been in place for some time, upon re-examination by the committee, there is no logical reason for this section to establish a maximum occupancy limit based on providing a minimum floor area per occupant simply because someone is in a refrigerated area. This change is consistent with the 2018 IMC (changes proposed) and IIAR 2.

Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and strikethrough (for deletions)

Document History

August 20, 2019
Safety Standard for Refrigeration Systems
A description is not available for this item.
January 12, 2019
Designation and Safety Classification of Refrigerants
A description is not available for this item.
January 12, 2019
Designation and Safety Classification of Refrigerants
A description is not available for this item.
January 12, 2019
Designation and Safety Classification of Refrigerants
A description is not available for this item.
January 12, 2019
Designation and Safety Classification of Refrigerants
A description is not available for this item.
15
January 1, 2019
Safety Standard for Refrigeration Systems
This standard establishes safeguards for life, limb, health, and property and prescribes safety requirements. This standard applies to a. the design, construction, test, installation, operation,...
34
January 1, 2019
Designation and Safety Classification of Refrigerants
This standard provides an unambiguous system for numbering refrigerants and assigning composition designating prefixes for refrigerants. Safety classifications based on toxicity and flammability data...
June 23, 2018
Safety Standard for Refrigeration Systems
A description is not available for this item.
June 23, 2018
Safety Standard for Refrigeration Systems
A description is not available for this item.
January 21, 2018
SAFETY STANDARD FOR REFRIGERATION SYSTEMS
A description is not available for this item.
January 20, 2018
Designation and Safety Classification of Refrigerants
FOREWORD Addendum n makes several changes with the purpose of aligning the toxicity classification procedure to be based on the nominal formulation of the blend. Note: In this addendum, changes to...
January 20, 2018
Designation and Safety Classification of Refrigerants
FOREWORD Addendum j adds the zeotropic refrigerant blend R-460C to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 20, 2018
Designation and Safety Classification of Refrigerants
FOREWORD Addendum l adds the zeotropic refrigerant blend R-407I to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 20, 2018
Designation and Safety Classification of Refrigerants
FOREWORD Addendum m adds the zeotropic refrigerant blend R-464A to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 20, 2018
Designation and Safety Classification of Refrigerants
FOREWORD Addendum k adds the zeotropic refrigerant blend R-464A to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
October 3, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the single-component refrigerant R- 1132a to Tables 4-1, D-1, and E-1. Note: In this addendum, changes to the current standard are indicated in the text by underlining...
October 3, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the single-component refrigerant R- 1224yd(Z) to Tables 4-1, D-1, and E-1. Note: In this addendum, changes to the current standard are indicated in the text by...
ASHRAE STD 15 & 34
June 23, 2017
Safety Standard for Refrigeration Systems
FOREWORD Addendum b makes several relatively small changes to the standard. • Removes a restriction on higher-flammability refrigerants where used in small, portable-unit systems. The use of...
June 23, 2017
Safety Standard for Refrigeration Systems
FOREWORD ASHRAE Standard 34-2010 revised the toxicity classification definition to use “Occupational Exposure Limit” (OEL) in place of “Threshold Limit Value-Time-Weighted Average” (TLV-TWA) and...
January 29, 2017
Safety Standard for Refrigeration Systems
Background: The refrigerant concentration as described in Section 7.2 “shall not exceed” the ANSI/ASHRAE Standard 34 Refrigerant Concentration Limits (RCLs). The total leaked refrigerant mass...
January 28, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the zeotropic refrigerant blend R-460B to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 28, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the zeotropic refrigerant blend R-460B to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 28, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the zeotropic refrigerant blend R-460A to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
January 28, 2017
Safety Standard for Refrigeration Systems
A description is not available for this item.
January 28, 2017
Designation and Safety Classification of Refrigerants
FOREWORD This addendum adds the zeotropic refrigerant blend R-460A to Tables 4-2 and D-2. Note: In this addendum, changes to the current standard are indicated in the text by underlining (for...
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