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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