What is the function of the boiler thermostat in the 'Two pipe semi gravity with heat sink' system?

• To regulate the temperature of the boiler

• To control the water flow in the pipes

• To monitor the pressure in the system

• To provide heat to the heat sink

What is one advantage of the 'Two pipe semi gravity with heat sink' system?

• Restricted heat control

• Compliant with Building Regulations part L

• Overheating possible

• Can be expensive

What is used to circulate heated water in fully pumped systems?

What components are installed to control fully pumped systems?

• Pumps and valves

• Thermostats and sensors

• Control panels and timers

• All of the above

What is the C Plan two pipe semi gravity system?

• A type of heating system

• A type of cooling system

• A type of ventilation system

• A type of plumbing system

What does the three-port mid-position valve control in the Y Plan system?

• Heating only

• Hot water only

• Both heating and hot water

• Neither heating nor hot water

True or False: The Y Plan system has an automatic bypass valve that connects the flow and return pipe.

• True

• False

The Y Plan system uses ______ to control the hot water.

• a thermostat

• a timer

• a valve

• a pump

If a property is over 150m², what should be fitted to allow independent control of upstairs and downstairs?

• A single thermostat

• Separate thermostats

• A central heating system

• An air conditioning unit

Which system offers full thermostatic control?

• A) Y Plan

• B) S Plan

• C) Both

• D) None