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WorksheetsA2l Refrigerant UANJ
Total questions: 10
Worksheet time: 6mins
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