EPA 608 Type III · Leak Detection · Medium
What is the recommended method to leak-test a low-pressure chiller without exceeding rupture disc limits?
Answer: B. Circulate warm water through the chiller tubes.
- APressurize the system with nitrogen up to 50 psig.
- BCirculate warm water through the chiller tubes.✓ Correct
- CUse compressed air to raise pressure to 30 psig.
- DPull a deep vacuum and use a halide torch.
Why B is right
Raising the system pressure by circulating warm water through the tubes is safe and prevents the rupture disc from bursting, which typically happens at 15 psig.
More Type III questions
- What indicates a tube leak in a low-pressure centrifugal chiller?
- How do you find a leak in the water tubes of a low-pressure chiller?
- What is the maximum safe test pressure for a low-pressure centrifugal chiller?
- What is the primary purpose of a purge unit on a low-pressure centrifugal chiller system?
- Where does the purge unit take its suction from?
Go deeper with the study guide AIM Act 2026: The HFC Leak Repair Rules for HVAC Techs, 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.