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Central Heating

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Pipework

System Layout

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Maintenance

Commissioning

Heating system water analysis

Servicing

Controls

Circulating Pump

Heating System Controls

Minimum Requirements

Room Thermostats

Regulations

Regulations

Heat Emitters

Heat Loss Calculation

Radiator Sizing

Types

Pipework

Fully Pumped Hot Water and Central Heating

Gravity Hot Water and Pumped Central Heating

Gravity System

Open-vented System

Pipework Sizing

Pipework Systems

Sealed Systems

System Layout

Underfloor Heating

Boilers

Boiler Sizing

Flue Types

Gas Boilers

Heat Pumps

Oil Fired Boilers

SEDBUK Rating

Solid Fuel Boilers

Bonding

  • 10mm - The minimum size of earthing cable used to bond the main services
  • 3A switched fuse spur - correct size for protecting a domestic central heating circuit
< Go Back2013-04-19

Most Common Systems

  • Fully pumped system using a 2-position 3-port diverting valve
  • One of the first fully pumped systems
  • Three port valve and timing device is different from three-port mid-position valve
  • Fully pumped system using 3-port mid-position valve
    • Y-Plan system
    • Time control via programmer and TRVs
    • For dwellings up to 150m2
  • Fully pumped system using 2x2 port valves
    S-plan system with 2 separate 2-port valves
    • S-Plan system
    • For dwellings greater than 150m2
    • Extra 2-port Valve and Room Thermostat required for each extra Heating Zone
< Go Back2013-04-19