Type II — medium, high and very high-pressure appliances: flashcards

All cards

Pressure classes at 104 F

Low <45 psia · medium 45-170 · high 170-355 · very high >355 psia.

Table 1: high-pressure

Under 200 lb = 0. 200 lb or more = 4 inches (pre-1993) or 10 inches (post-1993).

Table 1: medium-pressure

Under 200 lb = 4/10. 200 lb or more = 4/15.

Leak rates (50 lb or more)

Commercial refrigeration 20% · industrial process 30% · comfort cooling and other 10%.

Non-major repair shortcut

0 psig for medium/high/very high; 5 psig for an oil change.

System-dependent limit

Not above 15 lb of refrigerant.