Unit 317 Central Heating Systems – Design, Controls & Efficiency

​Central Heating Systems – Planning and Design assignment

​Learning Outcomes:

• Understand the function and design of sealed and zoned heating systems.

• Evaluate the role of controls in improving system efficiency.

• Explore the principles and benefits of underfloor heating systems.

​Part A: Knowledge Check

Use the 2 links below to open the Heating text to help with this assignment

The_City_and_Guilds_Textbook_Plumbing_Book_2_for_t..._----_(3_Central_heating_systems_planning_and_design).pdf

Doc L1A.pdf

Multiple Choice

What is the main purpose of a low loss header in a multiple boiler installation?

• To increase the temperature of the water

• To balance water flow between boilers and the heating system

• To reduce the size of the boiler

• To add chemicals to the water

Multiple Choice

What is thermal shock in boilers?

• Sudden cooling or heating that damages the heat exchanger

• A type of electrical fault

• A method of cleaning boilers

• A way to start the boiler quickly

Multiple Choice

Which of the following is an effect of thermal shock on boiler heat exchangers?

• Improved efficiency

• Cracking or damage to the heat exchanger

• Lower water pressure

• Increased water flow

Multiple Choice

Which of these is an example of an advanced heating control?

• Manual thermostat

• Weather compensation control

• On/off switch

• Radiator valve

Multiple Choice

What does a boiler interlock do?

• Stops the boiler from working

• Ensures the boiler only runs when heat is needed

• Increases the water temperature

• Makes the boiler run all the time

Multiple Choice

Why is boiler interlock important for system efficiency?

• It uses more energy

• It prevents unnecessary boiler operation

• It makes the system louder

• It increases water pressure

Multiple Choice

Which of the following is NOT a type of advanced heating control?

• Load compensation

• Weather compensation

• Manual switch

• Optimising control

Multiple Choice

What is the difference between good practice and best practice heating controls according to CHeSS CE51?

• Good practice uses basic controls, best practice uses advanced controls

• Good practice is more expensive

• Best practice is less efficient

• There is no difference

Multiple Choice

Which control helps the heating system adjust to changes in outside temperature?

• Weather compensation

• Manual thermostat

• Boiler interlock

• Timer switch

Multiple Choice

Which control adjusts the boiler output based on the temperature inside the building?

• Load compensation

• Weather compensation

• Manual switch

• Radiator valve

Multiple Choice

What is the main function of an optimising control in a heating system?

• To start and stop heating at the best times for comfort and efficiency

• To increase water pressure

• To make the system louder

• To add chemicals to the water

Multiple Choice

Which of the following is a sign of thermal shock in a boiler?

• Cracks in the heat exchanger

• Increased water flow

• Lower temperature

• No effect

Multiple Choice

Why should thermal shock be avoided in boiler systems?

• It makes the system more efficient

• It can damage the heat exchanger

• It increases water pressure

• It reduces noise

Multiple Choice

Which of these is a benefit of using advanced heating controls?

• Improved energy efficiency

• Increased noise

• Lower water pressure

• More manual work

Multiple Choice

What does CHeSS CE51 recommend for best practice heating controls?

• Use advanced controls like weather and load compensation

• Use only manual switches

• Ignore outside temperature

• Run the boiler all the time

Multiple Choice

Which of the following is NOT a function of a low loss header?

• Balancing water flow

• Preventing thermal shock

• Increasing water temperature

• Separating boiler and system circuits

Multiple Choice

What is the main goal of heating controls in a boiler system?

• To use energy efficiently and keep rooms comfortable

• To make the system louder

• To increase water pressure

• To add chemicals to the water

Multiple Choice

Which of these is a good practice heating control?

• Room thermostat and timer

• Weather compensation

• Load compensation

• Optimising control

Multiple Choice

What does a weather compensation control do?

• Adjusts heating based on outside temperature

• Increases water pressure

• Adds chemicals to the water

• Makes the system louder

Multiple Choice

Which of the following is a reason to use boiler interlock?

• To prevent the boiler from running when heat is not needed

• To increase water temperature

• To add chemicals to the water

• To make the system louder

​Part B: Application Task – System Design Scenario

You are tasked with designing a heating system for a five-bedroom detached house (floor area: 210 m²). The client wants:

• Zoned heating (upstairs/downstairs)

• Energy-efficient controls

• Underfloor heating in the kitchen and bathrooms

Task: On the floorplan provided:

1. Sketch the layout of the heating system, include positional information and labels for:

   • Boiler type

   • Zoning arrangement

   • Control devices (e.g., TRVs, thermostats, programmers)

   • Underfloor heating integration

Task 2: On the next slides, Justify your design choices by referencing:

• Energy efficiency

• Comfort

• Compliance with Building Regulations (Document L1A/B)

Open Ended

How does you system design comply with energy efficiency regulations as set out in Building regulation Par L1A

​Part C: Research & Reflection

Research one smart heating control system (e.g., Hive, Nest, Tado, or any of your choice) and on the next slides answer:

• How does it improve energy efficiency compared to traditional controls?

• What features make it suitable for modern domestic heating systems?

• Reflect: Would you recommend this system to a client? Why or why not?

Open Ended

Which smart control system have you chosen ?

Open Ended

Research one smart heating control system (e.g., Hive, Nest, Tado, or any of your choice) and answer:

1. How does it improve energy efficiency compared to traditional controls?

Open Ended

Research one smart heating control system (e.g., Hive, Nest, Tado, or any of your choice) and answer:

2. What features make it suitable for modern domestic heating systems?

Open Ended

Research one smart heating control system (e.g., Hive, Nest, Tado, or any of your choice) and answer:

3. Reflect: Would you recommend this system to a client? Why or why not?

​END

The next 2 slides showing the floorplan of the 5 bed house can be printed to assist with the assignment.

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