Navien NaviCirc Installation And Operation Manual page 60

2.4.3.3 Wiring Diagram - Zone Pump System
NCB-H boilers can operate a heating system with up to 3 zones.
The following is the wiring diagram for a zone pump system with
3 zones.
Zone Pump Dry Contact Connections (no 24VAC power) and
Thermostats without 24VAC power
Zone pump 1 Zone pump 1
(max. 2.5 A) (max. 2.5 A)
Zone pump 2 Zone pump 2
(max. 2.5 A) (max. 2.5 A)
Zone pump 3 Zone pump 3
(max. 2.5 A) (max. 2.5 A)
Neutral Neutral
(N) (N)
Line Line
(L) (L)
Neutral Neutral
(N) (N)
Line Line
(L) (L)
Neutral Neutral
(N) (N)
Line Line
(L) (L)
60
lLWCO
AC24VL
AC24VN
SUPPLY RETURN OUTDOOR T/S_ZONE3 T/S_ZONE2 SUPPLY T/S_ZONE1 RETURN OUTDOOR T/S_ZONE3
TEMPERATURE SENSOR R W C R W C R TEMPERATURE SENSOR W C R W C R
Pump Ground Pump Ground
lLWCO
AC24VL
AC24VN
T/S_ZONE2 T/S_ZONE1
W C R W C
SUPPLY SUPP RETU
TEMPERATU