central heating 3

Name this component

• BS 1212 part 1 FOV

• BS 1212 part 2 FOV

• BS 1212 part 3 FOV

• BS 1212 part 4 FOV

What is the purpose of this component in a central heating system

• Fills hot water cylinder

• Controls water level in cold water storage cistern

• Fills combination boiler

• Controls water level in feed and expansion cistern

Answer explanation

This is a bs-1212 part 2 float valve used in F&E tanks to control the water level.. the water level only needs to be set just above the cold feed pipe to allow for system expansion (4%). no valves are to be fitted on the cold feed and vent pipe as this could create a dangerous situation within the system of pressure build up.

Name this component

• Room thermostat

• Programmer

• Cylinder thermostat

• Remote sensor

Answer explanation

A cylinder thermostat is specifically designed to control the temperature of hot water cylinders, making it the correct choice. The other options serve different functions in heating systems.

Identify this component

• Pressure relief valve

• Radiator valve

• Lockshield valve

• Automatic air vent

Answer explanation

The pressure relief valve is designed to release excess pressure from a system, preventing potential damage. It is crucial in maintaining safe operating conditions, distinguishing it from other valves like radiator or lockshield valves.

What is this component?

• Feed and expansion cistern

• Cold water storage cistern

Answer explanation

The correct answer is 'Feed and expansion cistern' as it is specifically designed to maintain water levels in heating systems, allowing for expansion and contraction, unlike a cold water storage cistern which serves a different purpose.

What is the normal capacity of this component?

• 4 Litres

• 10 Litres

• 18 Litres

• 24 Litres

Answer explanation

The normal capacity of this component is 18 Litres, which is the most common size for similar components, providing a balance between usability and efficiency.

Which systems of control could this item be used with?

• C plan

• C plan +

• S plan

• Y plan

Answer explanation

The item is compatible with S plan, C plan, and C plan + systems of control, as they share similar functionalities and requirements, making them suitable for integration.

What is this component used for?

• Filling a low pressure heating system

• Filling a high pressure heating system

Answer explanation

This component is specifically designed for filling a high pressure heating system, ensuring it operates efficiently and safely under elevated pressure conditions.

Why does this component need to have a double check valve included?

• To protect from contamination by category 2 water

• To protect from contamination by category 3 water

• To protect from contamination by category 4 water

• To protect from contamination by category 5 water

Answer explanation

A double check valve is essential to protect against contamination by category 3 water, which includes harmful pathogens. This ensures that any backflow does not introduce unsafe water into the system.

This is an underfloor heating manifold

• True

• False

Answer explanation

The statement is true because the image or description provided clearly identifies the object as an underfloor heating manifold, which is used to distribute heated water in underfloor heating systems.