Central Heating Systems QuizL3P2U7,1.12

What effect can trapped air have on a heating system?

• Causing cavitation leading to pump failure, excessive noise and corrosion

• Causing leaks in the system

• Reducing the water pressure

• Increasing the system efficiency

Why should we remove the pump before filling the system?

• To replace the pump with a new one

• To clean the pump

• To check for pump damage

• To prevent debris from entering the pump

Which radiator should be filled with water first?

• The nearest radiator on the top floor

• The furthest radiator on the top floor

• The furthest radiator on the ground floor

• The nearest radiator on the ground floor

What should be checked before filling open vented systems?

• The pressure gauge

• The pressure relief valve

• The water level in the F&E cistern

• The pressure in the expansion vessel

What is the purpose of the cold flush in the filling process?

• To increase the system water pressure

• To remove any debris that entered the system during installation

• To check for leaks in the system

• To adjust the pressure in the expansion vessel

What should be done if the pressure in the sealed system falls towards zero pressure during filling?

• Continue filling without any action

• Stop filling and call for professional help

• Go back to the filling loop and fill back up to 1 bar pressure

• Open the pressure relief valve to release excess pressure

What should be visually checked after the system is full?

• The water level in the F&E cistern

• The pressure in the expansion vessel

• Leaks across the system

• The pressure gauge

What is the purpose of opening manually all motorised valves and zone valves before filling the system?

• To increase the system water pressure

• To prevent air from entering the system

• To allow the system to fill properly

• To check for leaks in the system

What should be done after draining down the entire system at each downstairs radiator?

• Refit the pump and turn on the pump valves

• Open the pressure relief valve to ensure water discharges

• Replace the pump with a short piece of tubing

• Check the pressure in the expansion vessel

What is the purpose of the temporary filling loop in the sealed system?

• To increase the system water pressure

• To prevent air from entering the system

• To check the pressure in the expansion vessel

• To allow the system to fill to 1bar pressure