3 Type II: High-Pressure Appliances Free Online FlashCards

What appliances does Type II certification cover?

Type II covers servicing or disposing of stationary high- and very-high-pressure appliances, excluding small appliances and motor-vehicle air conditioners.

What does refrigerant recovery mean?

Recovering removes refrigerant from an appliance and stores it in an external container; it does not necessarily clean or process the refrigerant.

Why recover liquid refrigerant first when practical?

Recover liquid refrigerant first when practical; removing liquid before vapor can speed up recovery.

How should a recovery cylinder be filled safely?

Use a scale and never exceed the recovery cylinder’s rated fill limit.

What is the rule on venting refrigerant during service?

Do not intentionally vent refrigerant during service. Only limited, de minimis releases during good-faith recovery efforts, such as some hose-connection losses, are allowed.

When must recovered refrigerant be reclaimed?

Recovered refrigerant may generally return to the same appliance or another appliance owned by the same person. If ownership changes, an EPA-certified reclaimer must reclaim it.

What evacuation level applies to very-high-pressure or under-200-lb high-pressure appliances?

The table requires 0 in. Hg vacuum for very-high-pressure appliances and for high-pressure appliances charged with under 200 lb, regardless of recovery-equipment age.

When may a technician evacuate only the section being serviced?

For an appliance with more than 5 lb of refrigerant, recover refrigerant, including liquid, before opening. You may isolate and evacuate only the section being serviced if its refrigerant can be isolated to a system receiver.

How should a leaking appliance be evacuated if the table level cannot be reached?

If a leak prevents reaching the table level, isolate leaking and non-leaking sections where possible. Evacuate non-leaking sections to the table level; evacuate leaking sections to the lowest attainable level without substantial contamination, but not above 0 psig.

What pressure is required before a qualifying non-major repair?

For a non-major repair with no evacuation to the atmosphere afterward, bring a high- or very-high-pressure appliance to 0 psig or lower before opening. This differs from the table’s vacuum levels.

When is system-dependent recovery equipment restricted?

System-dependent recovery equipment generally cannot be used on appliances with a full charge over 15 lb unless it is permanently attached as a pump-out unit.

What ODS leak rates trigger corrective action?

For covered ODS appliances charged with at least 50 lb, corrective action is triggered when the 12-month leak rate exceeds 30% for industrial process refrigeration, 20% for commercial refrigeration, or 10% for comfort cooling and other covered appliances.