A2L Refrigerant Cylinder Handling, Storage, and Transportation 2

Question 1

What color coding identifies A2L refrigerant cylinders?

Accepted Answer

There is no universal color — cylinders are now painted light grey/silver per AHRI guidelines, with the refrigerant identified by label

Answer

AHRI Guideline N changed cylinder colors to uniform light grey/silver (RAL 7044) for all refrigerants, ending the color-coding system. Refrigerant identification is by label only.

Question 2

How must A2L refrigerant cylinders be stored at a job site?

Accepted Answer

Upright, in a well-ventilated area, away from heat sources and ignition sources, secured to prevent tipping

Answer

A2L cylinders require the same careful storage as any pressurized flammable gas: upright position, ventilated area, away from heat/ignition, and secured against falling.

Question 3

What is the maximum fill level for A2L refrigerant recovery cylinders?

Accepted Answer

80% of the cylinder's water capacity by weight

Answer

DOT regulations limit recovery cylinder fill to 80% of water capacity to allow for liquid expansion with temperature changes. Overfilling can cause catastrophic cylinder failure.

Question 4

During transportation, A2L refrigerant cylinders must comply with which regulations?

Accepted Answer

DOT Hazardous Materials Regulations (49 CFR), including proper labeling, placarding for quantity thresholds, and securing in the vehicle

Answer

A2L refrigerants are classified as DOT hazardous materials (Class 2.2 — non-flammable gas, despite being A2L) and must be transported according to 49 CFR regulations.

Question 5

A technician notices frost on an A2L refrigerant cylinder that was recently used. What does this indicate?

Accepted Answer

Rapid refrigerant withdrawal has cooled the cylinder below the dew point — this is normal but the cylinder should not be heated with an open flame

Answer

Frost forms when rapid liquid withdrawal absorbs heat from the cylinder, cooling its surface below the ambient dew point. This is normal but means the cylinder needs time to warm naturally — never use a torch.

(A2L) A2L Low GWP Flammable Refrigerant Safety Certification Practice Test

(A2L) A2L Low GWP Flammable Refrigerant Safety Certification Practice Test

A2L Refrigerant Cylinder Handling, Storage, and Transportation 2