Central heating components parts 1-3

Open-vented systems contain a feed and expansion (F&E) cistern, which fulfils two important functions, what are they?

• The means by which water enters the system for filling and top-up

• Feed to hot water cylinder

• Separates air from system water

• It allows space for the system water to expand when it is heated.

What are you not allowed to fit on either the open vent pipe or the feed and expansion pipe?

• Service valve

• Gate valve

• Tank connector

• Stop valve

Which FOV type is this?

BS____

How high should the open vent pipe be above the water level?

• 250mm

• 400mm

• 450mm

• 500mm

What can occur if the pump speed is set too high?

_______ ____

The preferred pump position for an open vented system is one which:

creates a ________ system pressure – a system with mostly ‘negative’ pressure gives the opportunity for micro-leaks to pull air into the system

The point where the cold feed connects. This is known as the _______ point.

Which is the correct pipework configuration?

• I,P,V

• V,I,P

• P,V,I

• P,I,V

With the H frame configuration, how far apart should the vent and inlet pipe be?

• 250mm

• 100mm

• 150mm

• 200mm

If port B on a mid position valve was open, which part of the system is being heated?

• Heating

• Hot water

• Both