Navien NHB Series, Installation & Operation Manual

Page: 40 / 135

40 Installing the System Piping
With 24VAC Connections
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Boiler Pump
DHW Pump
Zone Pump 2
Zone Pump 3
Pump Ground
Thermostat 1 Thermostat 2
DHW Aquastat
(Priority)
Thermostat 3
Use with dry
contacts only
Note
Ɣ
The C terminals are for optional connections with 24 V thermostat COMMON.
Ɣ
If the DHW Tank is connected to the terminal, the T/S Zone 1 input is not available.
Ɣ
Pumps are connected through dry contact connections.
Ɣ
The rated output of the provided dry contacts are designed to be 5A/120V per each output.