Appendix Y - Appendix Y to Subpart G of Part 82—Substitutes Listed in the June 13, 2024, Final Rule, Effective July 15, 2024
Refrigerants—Acceptable Subject to Use Conditions
| End-use | Substitute | Decision | Use conditions | Further information | 1. Retail Food Refrigeration—Stand-alone units and refrigerated food processing and dispensing equipment, excluding refrigerated food processing and dispensing equipment that is within the scope of UL 621 (Ice Cream Makers) (New only) | HFO-1234yf, HFO-1234ze(E), R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in stand-alone units and refrigerated food processing and dispensing equipment if and only if such equipment meets requirements listed in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 1 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 1. This listing 1 does not apply to refrigerated food processing and dispensing equipment that is within the scope of UL 621 (Ice Cream Makers). In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 1 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 1. The following markings must be attached at the locations provided and must be permanent: | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
It is the obligation of regulated entitles to inform themselves of and comply with any other applicable legal obligations or restrictions. Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants. | (a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.”
(b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. | Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely.
Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 60355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from retail food refrigeration appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.”
(g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border) as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition
1 8 9 on the following three locations:
• Outside of the equipment (label (a)); • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | 2. Retail Food Refrigeration—Refrigerated food processing and dispensing equipment (New only)—excluding refrigerated food processing and dispensing equipment that is within the scope of UL 621 (Ice Cream Makers) | Propane (R-290) | Acceptable subject to use conditions | This refrigerant may be used only in new equipment specifically designed and clearly identified for the refrigerant ( This refrigerant may be used in refrigerated food processing and dispensing equipment if and only if such equipment meets requirements listed in ASHRAE 15-2022. 1 4 5 In cases where this listing 2 includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 2 in place of requirements in the ASHRAE Standard. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 2. This listing 2 does not apply to refrigerated food processing and dispensing equipment that is within the scope of UL 621 (Ice Cream Makers). In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 2 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 2. The following markings must be attached at the locations provided and must be permanent: | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
It is the obligation of regulated entitles to inform themselves of and comply with any other applicable legal obligations or restrictions. Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants. | (a) On the outside of the equipment: “DANGER—Risk of Fire Or Explosion. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.”
(b) On the outside of the equipment: “WARNING—Risk of Fire Or Explosion. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “DANGER—Risk Of Fire Or Explosion. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “DANGER—Risk of Fire or Explosion due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. | Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely.
Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from retail food refrigeration appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” | (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire or Explosion—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” | (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. | The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition 1 8 9 on the following three locations: | • Outside of the equipment (label (a));
• on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | 3. Retail Food Refrigeration—Remote condensing units and supermarket systems (New only) | HFO-1234yf, HFO-1234ze(E), R-454A, R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in remote condensing units and supermarket systems if and only if such equipment meets requirements listed in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 3 in place of requirements in the ASHRAE Standard. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 3. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 3 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 3. The following markings must be attached at the locations provided and must be permanent: | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
It is the obligation of regulated entitles to inform themselves of and comply with any other applicable legal obligations or restrictions. Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. | (a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.”
(b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. | Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants.
Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely. Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from retail food refrigeration appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” | (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” | (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. | The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25 mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition, 1 8 9 on the following three locations: | • Outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label) | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | The substitute R-454A may only be used in equipment with a refrigerant charge capacity less than 200 pounds, or in the high-temperature side of a cascade system. | 4. Commercial Ice Machines (New only) | HFO-1234yf, R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in new commercial ice machines if and only if such equipment meets requirements listed in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 4 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 4. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 4 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 4. condition shall apply unless superseded by this listing 4. The following markings must be attached at the locations provided and must be permanent: | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
It is the obligation of regulated entitles to inform themselves of and comply with any other applicable legal obligations or restrictions. Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants. | (a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.”
(b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” | Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely.
Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. | a. If the equipment is delivered packaged, this label shall be applied on the packaging.
b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. | Flammable refrigerants being recovered or otherwise disposed of from commercial ice machine appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” | (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” | (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. | The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed.
In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition, 1 8 9 on the following three locations: | • Outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | 5. Commercial Ice Machines (New only)—as of 7/15/2024, for commercial ice machines with a remote compressor, for batch-type self-contained automatic commercial ice machines with a harvest rate above 1,000 lb ice per 24 hours and for continuous type self-contained automatic commercial ice machines with a harvest rate above 1,200 lb ice per 24 hours; for other types, as of [date reserved] | HFC-32, R-454A, R-454B | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in new commercial ice machines if and only if such equipment meets requirements in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 5 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 5. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 5 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 5. The following markings must be attached at the locations provided and must be permanent: | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
It is the obligation of regulated entitles to inform themselves of and comply with any other applicable legal obligations or restrictions. Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. | (a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.”
(b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. | Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants.
Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely. Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from commercial ice machine appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” | (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” | (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. | The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition 1 8 9 on the following three locations: | • Outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | 6. Industrial Process Refrigeration (New only) | HFC-32, HFO-1234yf, HFO-1234ze(E), R-454A, R-454B, R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in industrial process refrigeration equipment if and only if such equipment meets requirements in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 6 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 6. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 6 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 6. | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. | The following markings must be attached at the locations provided and must be permanent:
(a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.” (b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. (e) On the equipment near the nameplate: a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” | Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants.
Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely. Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from industrial process refrigeration appliances are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” | (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. | The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition, 1 8 9 on the following three locations: | • Outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | The substitute R-454A may only be used in chillers for industrial process refrigeration, in equipment with the refrigerant temperature entering the evaporator less than or equal to − °C, in equipment with a refrigerant charge capacity less than 200 pounds and with the refrigerant temperature entering the evaporator higher than −30 °C, and in the high-temperature side of a cascade system with the refrigerant temperature entering the evaporator higher than −30 °C. | The substitutes HFC-32 and R-454B may only be used in chillers for industrial process refrigeration, or in equipment with the refrigerant temperature entering the evaporator less than or equal to −30 °C. | 7. Cold Storage Warehouses (New only) | HFO-1234yf, HFO-1234ze(E), R-454A, R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in cold storage warehouses if and only if such equipment meets requirements in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 7 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 7. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 7 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 7. | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. | The following markings must be attached at the locations provided and must be permanent:
(a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.” (b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. | Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants.
Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely. Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 1 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from cold storage warehouses are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (e) On the equipment near the nameplate:
a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the GHS warning symbol for hazard category 1 flammable gases (black flame on a white background in a diamond with equal length sides with a red border), as defined in Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables, of ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition, 1 8 9 on the following three locations: | • Outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. | The substitute R-454A may only be used either in equipment with a refrigerant charge capacity less than 200 pounds or in the high-temperature side of a cascade system. | 8. Ice Skating Rinks (New only; Equipment with remote compressors) | HFO-1234yf, HFO-1234ze(E), R-454C, R-455A, R-457A, and R-516A | Acceptable subject to use conditions | These refrigerants may be used only in new equipment specifically designed and clearly identified for the refrigerant ( These refrigerants may be used in ice skating rinks with remote compressors if and only if such equipment meets requirements in ASHRAE 15-2022. 1 4 5 In cases where this listing includes requirements different than those of ASHRAE 15-2022, the appliance would need to meet the requirements of this listing 8 in place of the requirements in ASHRAE 15-2022. These refrigerants may only be used in refrigeration equipment that meets all requirements in UL 60335-2-89, 1 2 3 except as provided otherwise in UL 60335-2-89, in ASHRAE 15-2022, or in this listing 8. In cases where this listing includes requirements more stringent than those of UL 60335-2-89, the appliance must meet the requirements of this listing 8 in place of the requirements in UL 60335-2-89. Where similar requirements of ASHRAE 15-2022 and UL 60335-2-89 differ, the more stringent or conservative condition shall apply unless superseded by this listing 8. | Applicable OSHA requirements at 29 CFR part 1910 must be followed, including those at 29 CFR 1910.94 (ventilation) and 1910.106 (flammable and combustible liquids), 1910.110 (storage and handling of liquefied petroleum gases), and 1910.1000 (toxic and hazardous substances).
Proper ventilation should be maintained at all times during the manufacture and storage of equipment containing flammable refrigerants through adherence to good manufacturing practices as per 29 CFR 1910.106. If refrigerant levels in the air surrounding the equipment rise above one-fourth of the lower flammability limit, the space should be evacuated, and reentry should occur only after the space has been properly ventilated. Technicians and equipment manufacturers should wear appropriate personal protective equipment, including chemical goggles and protective gloves, when handling flammable refrigerants. Special care should be taken to avoid contact with the skin which, like many refrigerants, can cause freeze burns on the skin. A class B dry powder type fire extinguisher should be kept nearby. | The following markings must be attached at the locations provided and must be permanent:
(a) On the outside of the equipment: “WARNING—Risk of Fire. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.” (b) On the outside of the equipment: “WARNING—Risk of Fire. Dispose of Properly In Accordance With Federal Or Local Regulations. Flammable Refrigerant Used.” (c) On the inside of the equipment near the compressor: “WARNING—Risk of Fire. Flammable Refrigerant Used. Consult Repair Manual/Owner's Guide Before Attempting to Service This Product. All Safety Precautions Must be Followed.” (d) For any equipment pre-charged at the factory, on the equipment packaging or on the outside of the equipment: “WARNING—Risk of Fire due to Flammable Refrigerant Used. Follow Handling Instructions Carefully in Compliance with National Regulations” a. If the equipment is delivered packaged, this label shall be applied on the packaging. b. If the equipment is not delivered packaged, this label shall be applied on the outside of the equipment near the control panel or nameplate. | Technicians should only use spark-proof tools when working on air conditioning equipment with flammable refrigerants.
Any recovery equipment used should be designed for flammable refrigerants. Only technicians specifically trained in handling flammable refrigerants should service refrigeration equipment containing this refrigerant. Technicians should gain an understanding of minimizing the risk of fire and the steps to use flammable refrigerants safely. Room occupants should evacuate the space immediately following the accidental release of this refrigerant. Personnel commissioning, maintaining, repairing, decommissioning and disposing of appliances with this refrigerant should obtain training and follow practices consistent with Annex 101.DVT of UL 260355-2-89. 2 3 CAA section 608(c)(2) prohibits knowingly venting or otherwise knowingly releasing or disposing of substitute refrigerants in the course of maintaining, servicing, repairing or disposing of an appliance or industrial process refrigeration. Department of Transportation requirements for transport of flammable gases must be followed. Flammable refrigerants being recovered or otherwise disposed of from ice skating rinks are likely to be hazardous waste under the Resource Conservation and Recovery Act (RCRA) (see 40 CFR parts 260 through 270). | (e) On the equipment near the nameplate:
a. At the top of the marking: “Minimum Installation Height, X m (W ft)”. This marking is only required if required by UL 60335-2-89. The terms “X” and “W” shall be replaced by the numeric height as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the height in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. b. Immediately below (a) above or at the top of the marking if (a) is not required: “Minimum room area (operating or storage), Y m 2 (Z ft 2)”. The terms “Y” and “Z” shall be replaced by the numeric area as calculated per the UL Standard. Note that the formatting here is slightly different than the UL Standard; specifically, the area in Inch-Pound units is placed in parentheses and the word “and” has been replaced by the opening parenthesis. (f) For non-fixed equipment, on the outside of the product: “WARNING—Risk of Fire or Explosion—Store in a well-ventilated room without continuously operating flames or other potential ignition.” (g) For fixed equipment that is ducted, near the nameplate: “WARNING—Risk of Fire—Auxiliary devices which may be ignition sources shall not be installed in the ductwork, other than auxiliary devices listed for use with the specific appliance. See instructions.” (h) All of these markings must be in letters no less than 6.4 mm ( 1/4 inch) high. The equipment must have red Pantone® Matching System #185 or RAL 3020 marked service ports, pipes, hoses, or other devices through which the refrigerant passes, to indicate the use of a flammable refrigerant. This color must be applied at all service ports and other parts of the system where service puncturing or other actions creating an opening from the refrigerant circuit to the atmosphere might be expected and must extend a minimum of one (1) inch (25mm) in both directions from such locations and shall be replaced if removed. | In addition to or instead of the markings described in Clause 7.6DV D1 of UL 60335-2-89, the equipment may display the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) warning symbol for hazard category 1 flammable gases 1 7 8 (black flame on a white background in a diamond with equal length sides with a red border) on the following three locations: | • outside of the equipment (label (a)); | • on the appliance packaging for a factory-charged unit or adjacent to the control panel or nameplate of a unit charged in place (label (d)); and | • in a location visible when accessing a service port and where service puncturing or otherwise creating an opening from the refrigerant circuit to the atmosphere might be expected (e.g., process tubes) (service label). | The perpendicular height of the diamond containing the GHS warning symbol for hazard category 1 flammable gases shall be at least 15 mm ( 9/16 in). In addition, next to the GHS warning symbol for hazard category 1 flammable gases must be text of the refrigerant safety class of the refrigerant according to ASHRAE 34-2022, 1 4 6 7 in letters at least one-third the height of the diamond symbol. |
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1 The Director of the Federal Register approves this incorporation by reference (5 U.S.C. 552(a) and 1 CFR part 51). You may inspect a copy at the U.S. EPA or at the National Archives and Records Administration (NARA). Contact the U.S. EPA at: EPA Docket Center, WJC West Building, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20004,
2 You may obtain the UL material from: Underwriters Laboratories Inc. (UL) COMM 2000; 151 Eastern Avenue; Bensenville, IL 60106; phone: 1-888-853-3503 in the U.S. or Canada (other countries +1-415-352-2168); email:
3 UL 60335-2-89, Standard for Safety for Household and Similar Electrical Appliances—Safety—Part 2-89: Particular Requirements for Commercial Refrigerating Appliances, 2nd edition, dated October 27, 2021.
4 You may obtain the ANSI/ASHRAE material from: American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), 180 Technology Parkway NW, Peachtree Corners, Georgia 30092; phone: 1-800-527-4723 or 1-404-636-8400 in the U.S. or Canada; email:
5 ANSI/ASHRAE Standard 15-2022. Safety Standard for Refrigeration Systems, copyright 2022.
6 ANSI/ASHRAE Standard 34-2022. Designation and Safety Classification of Refrigerants, copyright 2022.
7 ANSI/ASHRAE Addendum a to ANSI/ASHRAE Standard 34-2022, Designation and Safety Classification of Refrigerants, ANSI-/ASHRAE-approved December 20, 2022.
8 You may obtain the UN material from the United Nations Publications section at:
9 ST/SG/AC.10/30/Rev.9, Global Harmonized System (GHS) of Classification and Labelling of Chemicals, Ninth revised edition, copyright 2021; Chapter 2.2, Flammable Gasses, and Annex 1, Classification and Labelling Summary Tables.