WORKING WITH FLAMMABLE REFRIGERANTS
QUESTIONS WITH ACCURATE ANSWERS
A2L class types. Class 1 correct answer all mechanical components and equipment
is housed in occupied spaces.
A2L class types. Class 2 correct answer compressors are in outside areas or
separate plant rooms.
A2L class types. Class 3 correct answer all refrigerant equipment is sited outside,
or in a plant room
A2L class types. Class 4 correct answer all refrigeration containing parts are
located in a ventilated enclosure
DSEAR meaning. correct answer Dangerous substances and explosive
atmospheres regulations.
For A2L refrigerants what additional equipment should be used in confined
spaces. correct answer Ventilation equipment - additional fans or extract is
recommended for R32
Key design considerations for A2-A2L-A3 systems correct answer Low refrigerant
charge - components with small internal volume and eliminate the ignition source
- Pipework which reduces leakage -
, List the potential hazards if exposed to high volumes of refrigerant vapour.
correct answer Oxygen deprivation - damage to nervous system - Cardia
sensitivity
Name 4 higher toxicity refrigerants. correct answer B1(non flammable)-B2L-B2-B3
Name 4 lower toxicity refrigerants. correct answer A1 (non flammable)-A2L-A2-A3
what additional measures in case of a leak for alarms correct answer separate
power supply- be audible and visible - automatic communication, where
supervised facilities exist.
what additional measures in case of a leak for lower level vent correct answer
Natural ventilation - with a sufficient opening area at high and low level with low
level vent being less than 0.2m
what additional measures in case of a leak for safety valves correct answer safety
shut off valves must be in appropriate positions with manufacturers specs - any
amount released must be below QLMV (RCL for lowest underground level)
what additional measures in case of a leak for ventilation correct answer must be
an area of sufficient space by mechanical means openings and with good airflow
what additional measures in case of leak for indoor units less than 1.8m from
floor correct answer Require mechanical ventilation and transfer opening -
Protection of pipework
What are A2 & A3 refrigerants correct answer Flammable refrigerants.
QUESTIONS WITH ACCURATE ANSWERS
A2L class types. Class 1 correct answer all mechanical components and equipment
is housed in occupied spaces.
A2L class types. Class 2 correct answer compressors are in outside areas or
separate plant rooms.
A2L class types. Class 3 correct answer all refrigerant equipment is sited outside,
or in a plant room
A2L class types. Class 4 correct answer all refrigeration containing parts are
located in a ventilated enclosure
DSEAR meaning. correct answer Dangerous substances and explosive
atmospheres regulations.
For A2L refrigerants what additional equipment should be used in confined
spaces. correct answer Ventilation equipment - additional fans or extract is
recommended for R32
Key design considerations for A2-A2L-A3 systems correct answer Low refrigerant
charge - components with small internal volume and eliminate the ignition source
- Pipework which reduces leakage -
, List the potential hazards if exposed to high volumes of refrigerant vapour.
correct answer Oxygen deprivation - damage to nervous system - Cardia
sensitivity
Name 4 higher toxicity refrigerants. correct answer B1(non flammable)-B2L-B2-B3
Name 4 lower toxicity refrigerants. correct answer A1 (non flammable)-A2L-A2-A3
what additional measures in case of a leak for alarms correct answer separate
power supply- be audible and visible - automatic communication, where
supervised facilities exist.
what additional measures in case of a leak for lower level vent correct answer
Natural ventilation - with a sufficient opening area at high and low level with low
level vent being less than 0.2m
what additional measures in case of a leak for safety valves correct answer safety
shut off valves must be in appropriate positions with manufacturers specs - any
amount released must be below QLMV (RCL for lowest underground level)
what additional measures in case of a leak for ventilation correct answer must be
an area of sufficient space by mechanical means openings and with good airflow
what additional measures in case of leak for indoor units less than 1.8m from
floor correct answer Require mechanical ventilation and transfer opening -
Protection of pipework
What are A2 & A3 refrigerants correct answer Flammable refrigerants.
