Navien NCB-150E Installation & Operation Manual page 29

3.6.2 System Application - Zone System with Zone Valves
Zone #2
Zone #1
Zone Valve
System Circulator
(Typical)
Air Separator
Expansion Tank
Additional Zone
Not to exceed 4 pipe Dia or Max. 12 in
System application drawings are intended
Note
to explain the system piping concept only.
Refer to 3.4 System Fill Connection on
page 26 for make-up fill connections
and refer to the requirements of your local
codes to ensure compliance.
Wiring Diagram
CN23 CN10
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S
<Zone Controller>
Zone1 Valve Zone2 Valve Zone3 Valve Zone4 Valve
<NCB-E>
CN24 CN25
Common Hot
Zone5 T/S Zone6 T/S
Zone5 Valve Zone6 Valve T/T
Installing the System Piping 29