Written to match the course specification with chapter names, matching the units within the specifications, and chapter outcomes mirroring the specification outcomes, this book uses step-by-step photos to engage learners and ease understanding. Margin notes and FAQs stimulate interest and reinforce basic information.Grey Htg valve HW valve Supply to system Double pole switch or socket outlet with 3 amp fuse HW HTG Q 0 0 O N Programmer Figure 5.41 Full wiring diagram for 2 x 2 port valves Wea#39;ll remove the neutral and earth connections for you, as by anbsp;...
|Title||:||Plumbing NVQ and Technical Certificate Level 3|
|Author||:||Mike Phoenix, John Thompson|
|Publisher||:||Heinemann - 2005|