Navien NFB-175H Installation Manual page 44

3.6.7 Wiring Diagram - Generic Zone
System with Zone Valves
<NFB-H>
SUPPLY RETURN
SUPPLY RETURN OUTDOOR
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S Zone5 T/S Zone6 T/S
Generic Zone Controller
Zone1 Valve Zone2 Valve Zone3 Valve Zone4 Valve Zone5 Valve Zone6 Valve
Boiler Pump System Pump
(max. 2.5 A)
(max. 2.5 A)
44 Installing the System Piping
AC24VN
C
W
R
C
W
R
NC
NO
COM
NC
NO
C
COM
NC
NO
COM
LWCO W
AC24VL
AC24VN
C
W R
R
C
W
R
C
C
W
R
C
W
W
OUTDOOR DHW TANK
R
DHW TANK R
T/T
<NFB-H>
SUPPLY RETURN OUTDOOR DHW TANK
Pump Ground
3.6.8 Wiring Diagram - Generic Zone
System with Circulators
SUPPLY
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S Zone5 T/S Zone6 T/S
Generic Zone Controller
Zone1 Pump Zone2 pump Zone3 Pump Zone4 Pump Zone5 Pump Zone6 Pump
NC
NO
COM
NC
NO
COM
NC
NO
COM
LWCO
AC24VL
AC24VN
C
W
R
C
W
R
C
W
R
C
W
R
Boiler Pump
(max. 2.5 A)
<NFB-H>
AC24VN
C
W
R
C
W
R
NC
NO
COM
NC
NO
C
COM
NC
NO
COM
LWCO W
AC24VL
AC24VN
C
W R
R
C
W
R
C C
W
R
C
W
W
SUPPLY RETURN OUTDOOR DHW TANK R
RETURN OUTDOOR DHW TANK R
<NFB-H>
Pump Ground
T/T
NC
NO
COM
NC
NO
COM
NC
NO
COM
LWCO
AC24VL
AC24VN
C
W
R
C
W
R
C
W
R
C
W
SUPPLY RETURN OUTDOOR DHW TANK
R