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TABLE OF CONTENTS
CHAPTER 4 - BOILER PIPING ........................................................................................... 15
4.1. General Piping Requirements ...................................................................................................... 15
4.2. Pressure Relief Valve ....................................................................................................................15
4.3. Boiler Air Vent ................................................................................................................................ 16
4.4. Low Water Cutoff Device .............................................................................................................. 16
4.5. Additional Limit Control ................................................................................................................ 17
4.6. Backflow Preventer ....................................................................................................................... 17
4.7. EXALT Solo Boiler System Piping ................................................................................................ 17
4.7.1 Expansion Tank and Makeup Water ................................................................................... 18
4.7.2 Diaphragm Expansion Tank ................................................................................................ 18
4.7.3 Closed-Type Expansion Tank .............................................................................................. 18
4.7.4 Circulator .............................................................................................................................. 19
4.7.5 Sizing Primary Piping .......................................................................................................... 19
4.7.6 Domestic Hot Water System Piping ................................................................................... 19
4.7.7 System Piping – Zone Circulators ...................................................................................... 19
4.7.8 System Piping – Zone Valves ............................................................................................. 19
4.7.9 System Piping – Through Boiler ........................................................................................ 19
4.7.10 System Piping – Radiant Heating ...................................................................................... 19
4.7.11 System Piping – Special Application ................................................................................. 21
4.7.12 System Piping – Multiple Units Installation ...................................................................... 21
4.8. EXALT Combi Boiler System Piping ............................................................................................ 21
4.8.1 Expansion Tank and Makeup Water ...................................................................................22
4.8.2 Diaphragm Expansion Tank ................................................................................................22
4.8.3 Circulator ..............................................................................................................................22
4.8.4 Sizing Primary Piping ..........................................................................................................23
4.8.5 System Piping – Zone Circulators ......................................................................................23
4.8.6 System Piping – Zone Valves .............................................................................................23
4.8.7 System Piping – Through Boiler ........................................................................................23
4.8.8 System Piping – Radiant Heating ......................................................................................23
4.8.9 System Piping – Special Application .................................................................................23
4.9. Optional System Piping and Cascading ..................................................................................... 23