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Chiller - Controls
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Chiller - Controls

Introduction to Chair Controls

In this section, the speaker introduces the controls of a chair and explains the purpose of the control box mounted on the chiller. The control box is responsible for taking measurements from various parts of the machine to control and protect it.

Chair Controls Overview

  • The controls box is mounted on the chiller and consists of a controller, cables, and wires.
  • It allows remote control and access via the BMS (Building Management System).
  • The control box takes measurements from different parts of the machine to control and protect it.

Importance of Control Box on Chiller

This section discusses why the controls box is necessary for a chiller. It explains that the controls box collects measurements from various points in order to monitor and protect the machine.

Purpose of Control Box

  • The controls box collects measurements from all over the machine.
  • These measurements help in controlling and protecting the machine.
  • Logs are kept to diagnose any faults or issues with the machine.
  • Service engineers can use these logs to ensure proper functioning of the machine.

Monitoring Machine Performance

This section focuses on how temperature and pressure measurements are used to monitor and evaluate chiller performance. It also mentions how display units provide real-time data for analysis.

Temperature and Pressure Measurements

  • Display units show live data such as temperatures, pressures, states, load amps, etc.
  • Temperature measurements include flow and return temperatures in chilled water loop and condenser water loop.
  • Pressure measurements include evaporator pressure and condenser pressure.
  • These temperature and pressure readings help plot performance charts for analysis.

Flow Sensors for Water Loops

This section explains the importance of flow sensors in the chiller's water loops and how they ensure adequate flow to prevent freezing and damage.

Flow Sensors for Water Loops

  • Flow sensors are connected to the evaporator and condenser water loops.
  • They detect if there is adequate flow before allowing the chiller to start.
  • Inadequate flow can lead to freezing and bursting of heat exchanger tubes.

Refrigerant Behavior Monitoring

This section discusses how the chiller monitors refrigerant behavior by measuring pressure and temperature at different points in the system.

Monitoring Refrigerant Behavior

  • The chiller monitors evaporator and condenser pressure.
  • It also measures suction line, discharge line, and liquid line temperatures.
  • These measurements help analyze performance using pressure enthalpy charts and refrigerant tables.

Vane Guide Control Loop

This section introduces vane guides as a means of controlling chiller capacity. It mentions that vane guide actuators need to be measured and controlled.

Vane Guide Control Loop

  • Vane guides are used to control the capacity of the chiller.
  • Actuators for vane guides need to be measured and controlled.

Monitoring Induction Motor

This section highlights the importance of monitoring the induction motor mounted on the back of the compressor. It explains that temperature, current, and voltage measurements are taken to protect against motor burnout.

Monitoring Induction Motor

  • Temperature of windings is monitored to prevent overheating.
  • Current per phase is measured to avoid excessive load on the motor.
  • Voltage is monitored for any abnormalities that could damage the motor.

Monitoring Lubrication Circuit

This section discusses the monitoring of the lubrication circuit, which is responsible for pushing lubricating oil to protect the motor and gears from overheating.

Monitoring Lubrication Circuit

  • Temperature and pressure of the lubrication circuit are monitored.
  • Lubricating oil prevents overheating of motor and gears.

Machine Protection Mechanisms

This section explains that temperature and pressure measurements around the chiller are not only used to run the machine but also to protect it. The machine has built-in programs that can stop or raise awareness about abnormal conditions.

Machine Protection Mechanisms

  • Temperature and pressure measurements help protect the machine from exceeding safe thresholds.
  • Built-in programs can stop or raise awareness about abnormal conditions.
  • High pressure can cause the chiller to trip and cease running for a certain amount of time.
  • Motor control panel records run hours, starts, and run time since last service.

Timestamps have been associated with relevant bullet points as per instructions.

New Section

This section provides an overview of the different measurements and data recorded by a chiller system.

Measurements in the Chiller System

  • The chiller system records live data, measuring pressure in kiloPascals and temperature in degrees Celsius.
  • The temperatures of different water loops are measured to detect flow.
  • Voltage and amps from the motor circuit are monitored.
  • Pressure and temperature sensors measure the refrigerant around the system.
  • The oil pump temperatures, pressures, and motor winding temperatures are also monitored.
  • The position of vane guides is recorded as a percentage.
  • The system tracks the number of hours the compressor has run for and since its last service.

New Section

This section concludes the video with a call to action for viewers.

Conclusion and Call to Action

  • Viewers are thanked for watching the video.
  • They are encouraged to subscribe for more videos like this one.
  • If the video was helpful, viewers are asked to like it, share it with others who might benefit, and leave any questions in the comment section below.
  • Viewers are reminded to visit the website "the engineering mindset com" for more information.
Video description

In this video we take a look at the controls of a typical centrifugal chiller. We look at how these work in order to learn HVAC and building services. LEARN MORE HERE: https://theengineeringmindset.com/chiller-control-basics/ Sign up for our FREE engineers newsletter for updates, competitions, news and offers 🎁 Link: http://engmind.info/Engineers-Report ⚡🛠️ TOOLS YOU NEED 🛠️⚡ ************************************** Get this HVACR book ➡️ https://amzn.to/3XFCaKC Professional Multimeter -➡️ https://amzn.to/3xu2Vaw Good multimeter -➡️ https://amzn.to/3xrbuTd Professional clamp meter ➡️ https://amzn.to/4140FnK Good Clamp meter ➡️ https://amzn.to/3xqt2is Outlet tester ➡️- https://amzn.to/3kavg2l Energy monitoring plug ➡️ https://amzn.to/3SkfPl7 Battery tester -➡️ https://amzn.to/3S3fHWI Basic electronics kit ➡️ https://amzn.to/3xuLiqS MY FAVOURITE GEAR 🎥 My camera - https://amzn.to/3YCZ7Q9 🎤 My Microphone - https://amzn.to/3YYXsUC ⌨️ My Keyboard - https://amzn.to/3lBsl33 🖥️ My monitor - https://amzn.to/415BGjW 🎧 My headphones - https://amzn.to/3lN7R7u 😎 Get your Engineers T-shirts, Hoodies, Cups & stickers here: ******************************* https://goo.gl/M1PGrx ☕ Buy Paul a coffee to say thanks ******************************* PayPal: https://www.paypal.me/TheEngineerinMindset 🙏 Support us on Patreon ******************************* https://www.patreon.com/theengineeringmindset 🕵️ Check out our website! ******************************* http://TheEngineeringMindset.com 👥 Socialise with us ******************************* FACEBOOK: https://www.facebook.com/theengineeringmindset TWITTER: https://twitter.com/TheEngMindset Instagram: https://www.instagram.com/engineeringmindset/ Google+: http://www.google.com/+Theengineeringmindset YouTube: http://www.youtube.com/theengineeringmindset 👀 Links - MUST WATCH!! 👀 ******************************* How water cooled chiller works Prt1 - https://youtu.be/0rzQhSXVq60 How water cooled chiller works Prt2 - https://youtu.be/3ZpE3vCjNqM How Air cooled chiller works - https://youtu.be/0R84hLprO5s How Absorption Chiller works - https://youtu.be/Ic5a9E2ykjo How Heat Pump works: https://youtu.be/G53tTKoakcY Primary & Secondary system: https://youtu.be/KU_AypZ-BnU Fan Coil Units: https://youtu.be/MqM-U8bftCI VAV Systems: https://youtu.be/HBmOyeWtpHg CAV Systems: https://youtu.be/XgQ3v6lvoZQ VRF Units: https://youtu.be/hzFOCuAho_4 HVAC Basics: https://youtu.be/klggop60vlM Heat Exchangers: https://youtu.be/br3gkrXTmdY Pumps: https://youtu.be/TxqPAPg4nb4 How a Chiller, Cooling Tower and Air Handling Unit work together - https://youtu.be/1cvFlBLo4u0 🔧🔨 Tools you need 🔧🔨 ******************************* VDE Screwdriver set: http://amzn.to/2jd4lQc Ratchet Screwdriver set: http://amzn.to/2iDLRsC Tape Measure: http://amzn.to/2zbqq8z Drill: http://amzn.to/2iFj3Qy Drill bits: http://amzn.to/2hK4BG1 Angle finder: http://amzn.to/2za6N0s Multi set square: http://amzn.to/2hIpWiY Level: http://amzn.to/2BaHSLJ T handle hex allen key: http://amzn.to/2z9OEjs Digital vernier: http://amzn.to/2hI5K0D Hammer: http://amzn.to/2hJj0lw Calculator: http://amzn.to/2z99yPx Multimeter: http://amzn.to/2Bbq5no Head torch: http://amzn.to/2z84sD7 Pocket torch: http://amzn.to/2zWfCyB Magnetic wristband: http://amzn.to/2iEnA5z Laser distance finder: http://amzn.to/2hL4KsM Gorilla tape: http://amzn.to/2zqxiTm #HVAC #refrigeration #engineering