• Auto mechanic turned industrial refrigeration service tech
• 8-month HVAC training certifications
  • 40-hour days at night
  • Invest in yourself and your future will be bright
• RETA CIRO Certification Holder
  • Preparing for test
    • Taking a test and what I do I work at are much different
  • RETA Review Course
  • Pass Rates
  • Online Training
  • Hard work pays off
• Best part of working for a contractor? – Start-Ups vs. Operations vs. Maintenance vs. Modifications vs Installations
  • Operators have one plant to learn, we have to learn many plants
  • Frustrations of a service tech
  • Confidence with experience
• Go to tools needed for every service tech?
• Accident with NH3 – Three to the hospital
• Close Call #1
• Close Call #2

The post Safety Is a Resource – Life as a Service Tech first appeared on Ammonia Refrigeration Training Solutions - ARTS - PSM / RMP.

• Ventilation requirements of engine/machinery rooms 
  • B2L and A2L refrigerants
  • How much ammonia must be released for ignition?
  • Ventilation Rates from Bulletin 111 to IIAR 2
  • Worst Case Scenario Leaks
    • Shearing off a 1/2” pipe
  • 4% = 25% of the LEL (Lower Explosive Limit)
  • 30 Air Changes per Hour (ACH)
    • (Length X Width X Height) / 2
• Acceptable ammonia loss rates
  • Expect to lose your inventory due to normal operations and Maintenace
  • Rule of thumb for refrigerants (10% to 20%)
  • Rule for thumb for ammonia (5% – 10%)
  • 2,000 lbs. a year or 5% of system charge you should start to look deeper into the leaks
  • New Technical paper from the IRC
  • Bagging Valves?
  • Tally all residual losses due to maintenance
  • Should IIAR publish in a standard a definite release rate for the industry? 
• Existing system maintenance – pump down, pump out, LOTO, line break, and welding on the existing system with residual ammonia and oil.  
  • Written procedure must be used
  • Tightening closed isolation valves
  • Should IIAR publish in a standard a definite welding procedure for practices of systems with residual ammonia and/or oil?
• Testing compressor’s high-pressure cut-out switch.
  • 4 ways applicable is using a pressure transducer
    • Can’t remove switch and test on bench.
    • Can’t turn off, isolate compressor, and pressurize with a gas. 
    • Can manipulate high side pressure by
      • Choking discharge stop valve with machine unloaded
      • Cycle off condenser fans/water with compressors unloaded
      • Reduce cut-out number for a functional test
      • Check valve / block and bleed for new manufactures designs. 
• Low-Side Vessel High Level Protection
  • Testing High Level Floats
  • Regulators want to see that the test is functional and work under the conditions expected to work under
  • 1/2 tests
    • Lifting the float canister
    • Hitting the closing switch
    • Magnets
    • Taking off closing switch
• If any of the critical safeties trip (activate) during a normal operation due to the system being outside of normal parameters, can a facility take credit for it working and move back the next annual test a year from that time period? Of course, they would want to look into why the system was so far out of normal and do what they can to keep this from becoming norm.  

ARTS is booking classes and audit for 2022.  We wish you the best and thank you for trusting us as your preferred training partner. 

The post IIAR – Ammonia Refrigeration Technical RAGAGEP Questions first appeared on Ammonia Refrigeration Training Solutions - ARTS - PSM / RMP.

Discussions in today’s podcast include:

• Installation of ammonia systems globally
• The need of good ammonia operators
• Hot Gas Defrost and efficiencies
• The CK2 valve
• What happens if we are in gas defrost and the system loses electricity
• What if the CK2 opens and there is no bleed
• Installing the CK2 backwards
• The CK5
• Gas defrosts with downstream pressure control with automatic float expansion valves
• How can defrosts be done more efficient. 

At this link you can download a training document on gas defrosts. Ammonia Refrigeration – Parker Hot Gas Defrost

We have welcomed Simon back to the R-717 Show to discuss the application, uses, efficiency, and opportunities with ammonia heat pumps!

You can contact Simon at 978.409.5226 or email at sclarke@arc.cool

The post The Passion of Ammonia Refrigeration and Hot Gas Defrosts first appeared on Ammonia Refrigeration Training Solutions - ARTS - PSM / RMP.

In this podcast we discuss

• Where are we going to find ammonia techs
• It is time for existing techs to step up for that chance of advancement
• The legacy of Tim Korhs
• Advancement of the Northern Plains RETA Chapter
• Mineral Oil, Hydrotreated Oil, and Synthetic Oil
• Excessive temperatures with oil
• Water and Oil
• Ammonia Safety Considerations

Below are PDFs of Data sheets of the various oils discussed in the show.  

• R1-361 717-LTSC New PDS
• R1-321 717-SC New PDS
• R1-301 717-HT New PDS

The post Ammonia Refrigeration Training Solutions – NH3 Operators: Where are they & Refrigeration Oil first appeared on Ammonia Refrigeration Training Solutions - ARTS - PSM / RMP.