Across
- 3. operated by the fan to prove applance integrity so ignition sequence can begin.
- 4. in a system boiler heated system water is accommodated in the?
- 8. Water heaters and central heating boilers have the same job which is?
- 11. should the expansion vessel loose its charge this valve will lift?
- 13. heating water is prevented from reentering the potable cold water supply by?
- 14. wall mounted appliance providing mains fed hot water to bath, basin, shower, and kitchen sink is known as a?
- 18. device to prevent excessive water temperature?
- 19. heat is created in this area of the appliance by burning gas.
- 20. a gas circulator heats a direct cylinder by this method without the use of a circulating pump.
- 21. A standalone over sink prevision of instant hot water
Down
- 1. older standalone appliance which heats an indirect open vented cylinder to provide hot water to multiple appliances?
- 2. 1nd stage where the heated POC gather velocity
- 5. A room sealed boiler, containing pump, expansion vessel, and PRV having five pipes out the boiler case is a?
- 6. component of a room sealed used to remove the products of combustion by force operating the APS proving case integrity.
- 7. 2rd stage allows downdraughts in the secondary flue and products to be diluted
- 9. 3rd stage removes the POC safely from the property.
- 10. A heat only system boiler contains these water carrying components?
- 12. Has six pipes emanating from the case, producing heat and hot water
- 15. 4th stage assist in expelling PO, minimise downdraught and help prevent entry from debris and rain.
- 16. A room sealed boiler, with flow, return, gas & condensate is known as?
- 17. is designed to lower the the water pressure downstream of the diaphragm housing to activate the burner.