A2l Refrigerant UANJ

The classification of an A2L Refrigerant means:

• Non Toxic

  Non Flammable

• Non Toxic

  Highly Flammable

• Non Toxic

  Mildly Flammable

• Toxic

  Mildly Flammable

Can A2L refrigerant (R32 or 454B) be used to REPLACE and existing 410A refrigerant charge.

• NO

• YES

When using a recovery machine on an A2L how deep of a vacuums should the system be recovered?

• 15" HG

• 10" HG

• 0" HG

• Never Pull Sub Atmospheric - Stay at a slight positive + pressure not to introduce air

When Recovering A2L Refrigerants?

Pick all the correct answers

• Add a grounding wire to the recovery tank

• Use a A2L approved Recovery Machine & Tank

  White with Red Band

• Follow Best Recovery Techniques purging all equipment and hoses of air

• Do not recover into a vacuum and do not exceed excessive head pressures with recovery machine

• Always use a scale to weigh refrigerant 80% of WC and do not leave process unattended

A2L Refrigerants will auto propagate (burn) under ambient conditions?

• Yes

• No

After recovering an A2L system, it needs to be:

• Purged with OFD Nitrogen

• Pressure tested

• Nothing further is required

• Non of these answers

A2L tank access will require:

• No additional tools

• Left-hand thread adapters

• Will wait and see

• Should have taken notes

A2L Refrigerant is allowed to be vented because it is a Low GWP refrigerant

• True

• False

• Should have taken notes

• Both True and False

A2L systems will be outfitted with leak detection sensors and mitigation systems that will:

Pick All That Apply

• Start the indoor fan and dilute refrigeration mixture in the AHU

• Pump down refrigerant to outdoor condenser (Manufacture Specific)

• Will be sensing Ref based on their LFL

  Lower Flammability Limit

• Shuts off Heating or Cooling Modes

Striker Plates AKA Nailer Plates are required when concealing A2L line sets in studs or floor joists.

• True

• False