c heating Flashcards
What is the main purpose of central heating?
To maintain thermal comfort
What system would have a three port valve?
Y Plan system
What System would have 2 x Two Port Valves?
S Plan system
Which central heating system is most likely to have a filling loop as part of the system?
Sealed
What Building Regulation Documents the energy efficiency requirements for the installation of a
domestic central heating system?
Approved document L1
What does a air separator do?
Separate the air from water
In what significant way is selective heating, or zoned heating, different to full central heating?
Only heats up part of the property
What is background heating and why is it different to full central heating?
Heats up property at a lower temperature
What type of central heating system would have a combi boiler?
Sealed
What material is commonly used as domestic heating pipework insulation material?
Expanded nitrile rubber
What tool would you use to attach radiator valves to the radiator?
Radiator Valve Spanner
What type of central heating system would have a separate flow and return pipe running to each
radiator?
A two pipe system
What plastic would be used to manufacture plastic pressure pipe used for a central heating system?
Polybutylene
Which material is used for the manufacture of panel radiators, commonly used in domestic
installations?
Pressed steel
What would be the a main advantage of using plastic pressure barrier pipe in heating systems?
Speed of installation
In which location of a house is it normally an essential requirement to insulate central heating pipework?
Where positioned underneath a timber suspended ground floor
Panel radiators mainly use which heat transfer principles?
Convection
Which type of heat emitter is often used in a kitchen where space to hang a radiator is limited?
Kick space heater
Which British Standard states the European Standard for the manufacture of radiators?
BS EN 442
In relation to central heating systems, Delta T refers to the difference between the mean water
temperature in the radiator (water inside) and the?
Ambient air temperature.
What would be the main advantage of underfloor heating?
There is even heat distribution
When the TRVs or zone valves on a system close, what is the purpose of the automatic by-pass valve?
To ensure water can flow through the boiler
A new central heating is being commissioned. What should be completed prior to the water tightness
test?
All TRV’s are set to maximum and lockshield radiator valves are open
Which radiator valve is intended for maintenance purposes and not for use by the occupier?
Lockshield valve
