30 Installing the System Piping
3.5.2 System Application - Zone System with Zone Valves (Primary/Secondary Piping)
Make-up Water
Backflow preventer
Pressure reducing valve
Additional Zone
Zone #2
Zone #1
System Pump
Air Separator
Expansion Tank
Not to exceed 4 pipe Dia or Max. 12"
Zone Valve
(Typical)
Return filter
Boiler Pump
Note
●
System application drawings are intended to explain the system piping concept only.
●
Install a filter in the system return to remove foreign objects from the system. Foreign objects inside the system may result in
abnormal system operation.
●
Refer to “3.3 Filling the System” on page 27 for make-up water connections and refer to the requirements of your local codes
to ensure compliance.
●
Use a pump with an integral check valve or install a check valve at the pump outlet.
●
Refer to “3.6.5 Wiring Diagram - Zone Valve System” on page 39 for wiring connections.
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