EPA 608 Type 3 Already Rated A
1. How does moisture typically enter the refrigerant system on low-pressure chillers? - ️ Air leaks from areas with gaskets or fittings.
2. What is the maximum test pressure for leak testing a low-pressure centrifugal chiller? - ️ 10 psig.
3. What action sho...
1. How does moisture typically enter the refrigerant system on low-pressure chillers?
- ✔️ Air leaks from areas with gaskets or fittings.
2. What is the maximum test pressure for leak testing a low-pressure centrifugal chiller?
- ✔️ 10 psig.
3. What action should be taken regarding leak testing and repairing a CFC-11 chiller?
- ✔️ Leak test and repair the chiller to reduce refrigerant loss from a purge unit.
4. What is the purpose of a hydrostatic tube test kit?
- ✔️ To determine if a tube leaks.
5. What is the required action when the leak rate exceeds a certain percentage in commercial and
industrial process refrigeration systems?
- ✔️ Systems must be repaired when the leak rate exceeds 35% of the charge per year.
6. What is the typical starting method for refrigerant recovery?
- ✔️ Start with liquid recovery as it is faster.
7. At what pressure does a rupture disc on a recovery vessel for low-pressure refrigerants relieve?
- ✔️ 15 psig.
8. According to ASHRAE Guideline 3-1996, at what pressure level should a system be checked for leaks
during a standing vacuum test?
- ✔️ If the pressure rises from 1 mm Hg to above 2.5 mm Hg.
, 9. What is the primary water source for a recovery unit condensing coil?
- ✔️ Local municipal water supply.
10. What vapor pressure is necessary in the shells before charging with liquid refrigerant when
recharging a refrigeration system with R-11?
- ✔️ 16.9" Hg vacuum.
11. What must be done after recovering the liquid refrigerant?
- ✔️ Recover the vapor refrigerant.
12. According to the EPA, how much refrigerant vapor is typically left in an average 350 ton R-11 chiller
at 0 psig pressure after all liquid has been removed?
- ✔️ Approximately 100 pounds.
13. What can happen when charging refrigerant liquid into a refrigeration system under a 29 inch Hg
vacuum?
- ✔️ System water may freeze.
14. When is it acceptable not to evacuate the system to the required level?
- ✔️ When leaks in the appliance make evacuation to the prescribed level unattainable.
15. Which of the following repairs would always be considered "major" under EPA regulations?
- ✔️ Replacement of the evaporator coil.
16. What method is used to pressurize a low-pressure chiller for non-major repairs under EPA
regulations?
- ✔️ Warming the refrigerant.
17. If using a recovery machine manufactured after November 15, 1993, what is the required evacuation
level for a low-pressure appliance before making a major repair?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller bestscores1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.48. You're not tied to anything after your purchase.
