hot water 1-3 revision

What does WRAS stand for?

• Water Regulatory Advisory Society
• Water Regulations Advisory Scheme
• Water Resources Advisory Service
• Water Regulations Assessment System

What are the two things that WRAS does?

• Publishes the Water Regulations Guides and Lists approved fittings
• Manages public transportation systems
• Regulates air quality standards
• Maintains roadways and bridges

Describe the centralised hot water system.

• Centralised: water is heated and/or stored centrally in the building and is distributed from that point to all the hot water outlets
• Centralised: water is not heated centrally but rather at each hot water outlet
• Centralised: water is heated and/or stored in individual units and distributed to each hot water outlet
• Centralised: water is heated and/or stored in a decentralized manner throughout the building

Describe the localised hot water system.

• Water is heated and/or stored in a central location for the entire building.
• Water is heated and/or stored locally to one specific draw-off point area.
• Localised: water is heated and/or stored in a different country.
• Water is heated and/or stored in outer space.

What gives an open vented system its working pressure?

• The temperature of the water
• The head height of the CWSC.
• The material of the pipes
• The color of the pipes

Describe the single feed system

• Relies on a mechanical pump to separate the primary and secondary waters
• Uses a primatic cylinder and relies on an air bubble to separate the primary and secondary waters
• Uses a cylindrical tank with no separation between primary and secondary waters
• Fills the primary and secondary waters through separate feed pipes

Describe the double feed system.

• The primaries are filled from the F&E and the secondaries are filled from the CWSC
• The double feed system uses a single water source for both primaries and secondaries
• The double feed system uses a direct cylinder
• The primaries are filled from the CWSC and the secondaries are filled from the F&E

What are the main advantages of an indirect system?

• The system cannot be fully pumped
• Not Part L compliant
• Only one size of cylinder available
• Part L compliant, Various sizes of cylinders available, The system can be fully pumped

1. The water in a modern direct cylinder is commonly heated by what?

• Immersion heater
• Gas stove
• Wind turbine
• Solar panels

1. The water in a modern indirect cylinder is commonly heated by what?

• Coil heat exchanger
• immersion heater

• Gas burner
• Solar panels