EPA 608 Type III · Recovery Techniques · Hard
Why must evaporator and condenser water pumps run when recovering refrigerant from a low-pressure chiller?
Answer: D. To prevent the water inside the tubes from freezing.
- ATo flush oil out of the compressor bearings.
- BTo keep the purge unit from overheating.
- CTo increase the discharge pressure to 50 psig.
- DTo prevent the water inside the tubes from freezing.✓ Correct
Why D is right
As refrigerant is removed, the internal pressure drops, causing the remaining refrigerant to boil and lower the temperature. Running the water pumps prevents the tube water from freezing and rupturing.
More Type III questions
- What is the most efficient way to begin recovering refrigerant from a low-pressure chiller?
- What must be done after recovering the liquid from a low-pressure chiller?
- How should compressor oil be prepared before removal from a low-pressure chiller?
- What is the standard evacuation level for a low-pressure appliance?
- The Type III evacuation level of 25 mm Hg absolute equals about how many microns?
Go deeper with the study guide EPA 608 Evacuation Levels: The Required Vacuum by Appliance, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.