central heating combis

A combi boiler pressure should be set at what

• above 2 bar

• below 1 bar

• between 1 bar and 1.5 bar

• 3 bar

At what pressure will the PRV open

• 3 bar

• 2.8 Bar

• 2.5 Bar

• 3.2 bar

A combi boilers filler loop is best fitted to which inlet or out let pipe

• flow pipe

• return pipe

• gas pipe

• hot supply out

Which of the pipes connected to the boiler does not have a on/off service valve

• hot outlet

• cold inlet

• gas supply

• flow outlet

• return inlet

A magna clean filter is connected to what pipe (best practise)

• Flow pipe

• return pipe

• cold supply

• hot outlet

looking at the plan what is pipe number one(left hand pipe)

look at the arrows

• gas

• return

• flow

• cold

If a boiler flue

allows air in, and the products of combustion out side the building

• this called an ROOM SEALED APPLIANCE

• this is called an OPEN FLUED APPLIANCE

• this called an SPANNISH FLUED APPLIANCE

1. The boiler position can be higher than the hot water cylinder in a:

• a. System with microbore heating with gravity primaries

• Fully pumped sealed or open vent system.

• One pipe gravity system

• Gravity or semi gravity system

1. Which Building Regulation covers the energy efficiency requirements for central heating systems?

• L1a

• P1

• Doc H

• BS 6700

1. In which of the following situations is it important to insulate central heating pipework?

• a. Bathroom and north facing kitchen

• Any run of pipework over 3 metres in length, as per BS 12828.

• The loft area and under the suspended floors downstairs

• From the boiler to the index radiator