Hot water revision level 2

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Across
  1. 2. What is the primary function of the open vent on a domestic hot water system?
  2. 4. picture 6
  3. 13. A rigid pipework hot water system has a working pressure of 4bar. At what pressure should the pipework be tested for soundness?
  4. 16. component that the pressure and temperature relief valves discharges into
  5. 18. all boilers that are installed are required to be what?
  6. 20. Picture 2 type of localised hot water heater
  7. 22. what type of heat exchanger does a double feed indirect cylinder contain?
  8. 23. Picture 1
  9. 24. what does image 8 measure?
  10. 29. what type of pump should be used on secondary circulation
  11. 30. To prevent electrolytic corrosion taking place in a system, where can the magnesium rod be placed?
  12. 32. a renewebale enery source that produces electricity or hot water
  13. 35. picture 4 Type of hot water cylinder
  14. 36. If hard water is allowed to be heated above 65 degrees centigrade, what could be the consequence in the system?
  15. 37. a renewable source that produces hot water using compressed wood pellets
Down
  1. 1. the length insulation is required to be on a hot water cylinder
  2. 3. Building regulation that deals with hot water safety
  3. 5. name for cheaper priced electricity during the night time
  4. 6. A 450mm off set on the hot water draw-off point on a cylinder prevents what?
  5. 7. picture 7
  6. 8. type of boiler that is mains fed and supply’s hot water instantaneously
  7. 9. To overcome a dead leg for a hot water draw-off point, what could be installed?
  8. 10. another method of heating hot water directly in a cylinder
  9. 11. another term for a water jacket tube heater
  10. 12. component that protects against category 2 water
  11. 14. Which hot boosterpump Which hot water component should be fixed using flexible connections
  12. 15. picture 9
  13. 17. Under Building Regulations part G, what is a new or replacement immersion heater thermostat required to have?
  14. 19. Which of the following appliances is most likely to offer the customer low pressure at a hot water outlet?
  15. 21. tool used to take flow rates
  16. 24. Building regulation that deals with energy efficiency
  17. 25. the name given to the layers of hot water in the hot water cylinder
  18. 26. component that protects against category 3 water
  19. 27. component that takes the expanded water on a unvented system
  20. 28. what does secondary return prevent?
  21. 31. A customer has intermittent flow of hot water from their bath tap – what is the most likely cause of the problem?
  22. 33. picture 5 Type of hot water cylinder
  23. 34. Picture 3 Type of hot water cylinder