Navien NaviCirc Installation And Operation Manual page 61

OUTDOOR RETURN OUTDOOR T/S_ZONE3 T/S_ZONE3 T/S_ZONE2
R R C R
W W
Thermostat 3 Thermostat 3
Thermostat 2
T/S_ZONE2 T/S_ZONE1 T/S_ZONE1
C R C R C R C C
W W W W
Thermostat 2
Thermostat 1 Thermostat 1
Note
If you have a 24 V thermostat,
●
connect it to the R & C
terminals on the boiler's PCB.
The C terminals are for
●
optional connections with
24 V thermostats that have a
COMMON wire.
61