Navien NHB-055 Installation & Operation Manual page 32

3.6.3 Wiring Diagram - the Navien SmartZone +
When Navien boilers are used with a Navien Smartzone+ zone pump controller, an RS-485 data communication link is established through the
Ready-link connection. This allows the controller and the boiler to share operational information and to control the zones more efficiently by
minimizing unnecessary pump operation. The communication link also provides an optimal control environment for freeze protection.
Navien Boiler
Refer to the user manual that is supplied with the Navien Smartzone+ zone pump controller for details.
32 Installing the System Piping
S
R O/R
psi
Navien Smartzone +
Zone Pump Controller
Navien Ready-Link Cable