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Worksheetscentral heating combis
Total questions: 12
Worksheet time: 9mins
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
1. Out of the following locations, where would the air vents be located on a central heating Radiator
Immediately above the circulator
Just prior to each zone valve
Not needed
At the top of each radiator (either side)
Customer states that the radiator is hot at the bottom but cold at the top
Air in the Radiator,requires bleeding
Air in the radiator, turn up cirulator pump speed
Fill with Inhibitor
Flog the custom new TRVS
