9189PH1CHPPT2Q2

What controls the flow of water to the hot water cylinder and heating circuit in modern heating systems?

• Three-port mid-position valve

• Cylinder thermostat

• Room thermostat

• Programmer

Which type of fuel usually powers the boilers in these modern heating systems?

• Coal

• Natural gas

• Electricity

• Wood pellets

Where is the automatic bypass valve in the heating system?

• Regulates the water pressure

• Controls the room temperature

• Connects the primary flow and return pipe

• Activates the zone valve

What is the purpose of the automatic bypass?

• To allow water to circulate when the valves close the flow down

• To make the rads heat up faster

• To slow the pump down with ther eis too much pressure

• It serves no purpose on a Y plan other then to validate the boiler warranty

In the Y plan system, what does the three-port mid-position valve control the flow of water to?

• Both heating and hot water circuits

• Heating circuit only

• Hot water only

• Boiler and cylinder

What is the main function of the W plan system in these heating systems?

• Provides hot water and heating simultaneously

• Regulates the water pressure

• Provides hot water or heating, but never both simultaneously

• Controls the room temperature

In the fully pumped S plan system, what activates the zone valve to control the hot water?

• Three-port mid-position valve

• Room thermostat

• Cylinder thermostat

• Programmer

What is the purpose of fitting an additional heating zone valve in a property over 150m2?

• To control the room temperature

• To regulate the water pressure

• To comply with Part L building regs

• To allow independent control of two heating zones

What is the function of the two-port motorised valves in the S plan system?

• Control the room thermostat

• Activate the bypass valve

• Control the hot water and heating circuits separately

• Regulate the water pressure

What happens when there is a call for heat in the S plan system?

• The two port motorised valve opens

• The thermostat opens

• The thermostat sends a signal to the 2 port

• The programmer sends a signal to the thermostat