Cool Stuff

We produce a range of written material which is aimed at a variety of readers including apprentices, engineers, mangers and end users. Cool Stuff documents have been written at the request of customers or simply because we felt the subject needed a short simple explanation!

Click on the links below to view the PDFs.

• Cool Stuff index
  Download an overview of all articles as a reference.
   
• CS1 Connect then Purge
  How to avoid contaminating a system with air (or other contaminants) when connecting gauge line toa system.
• CS2 - How to Use Your Comparator
  A comparator gives the pressure temperature relationship at saturation conditions for common refrigerants and is useful for setting up systems and diagnosing faults.
• CS3 - Pressure Testing for Strength and Leak Tightness
  Why systems are pressure tested, and how to safely pressure test using nitrogen. How to calculate the test pressures in accordance with EN378.
• CS4 - Effective Evacuation
  Evacuation of systems to remove contamination prior to charging with refrigerant.
• CS5 - Setting TEV Superheat
  How to measure and adjust the superheat setting on thermostatic expansion valves.
• CS6 - HP Switch Setting
  How you decide what the high pressure (HP) switch setting should be. How you check and adjust HP switches.
• CS7 - LP Switch Setting
  How you decide what the low pressure (LP) switch setting should be. How you check and adjust the LP switch.
• CS8 - Subcooling
  What subcooling is, why it is important to the performance of a system and how to measure it.
• CS9 - Recovery Cylinders
  Recovery cylinders used for refrigerant removed from a system during service or decommissioning.
• CS10 - Recovery of Hydrocarbon Refrigerants
  Key points you should follow to ensure you recover hydrocarbon (HC) refrigerant safely.
• CS11 - Schrader Torque Tool
  Why it is important to use a torque tool when tightening Schrader valves.
• CS12 - Replacement Certificates
  How to obtain replacement City and Guilds certificates.
• CS13 - Revised F Gas Regulation
  The key changes in the revised Fluorinated Gas regulation.
• CS14 - Electrical Safe Isolation (Working Dead to Stay Alive)
  How to safely isolate electrical working (working dead).
• CS15 - Coming Soon
  Useful basics - Maths
• CS16 - Coming Soon
  Useful basics - Physics
• CS17 - Gas laws and pressure testing
  The gas laws and how they affect Strength and Tightness Testing
• CS18 - Temperature Glide Implications for Design Engineers
  Zeotropic refrigerants with high glide, guidance for applications engineers.
• CS19 - Temperature Glide Implications for Service Engineers
  Zeotropic refrigerants with high glide, guidance for service & commissioning engineers.
• CS20 - Basic Science for Refrigeration Engineers
  An explanation of the rules which are the basis of how refrigeration works
• CS21 - Maximum allowed pressure
  An explanation of PS and calculating system test pressures
• CS22 - Control Definitions
  A list of common control definitions with basic explanations
• CS23 - Pressure Equipment Directive (PED)
  General overview of the PED / PER
• CS24 - A2L Refrigerants and the Pressure Equipment Directive (PED)
  The implications of using an A2L refrigerant on the PED category of a system
• CS25 - R32 and the PED
  The implications of using A2L R32 in split air conditioning / heat pump systems on the PED category of a system

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