Navien NFB Series User Manual

42 Installing the System Piping
3.6.8 Wiring Diagram - Generic Zone System with
Circulators
<NFB>
COM
NO
NC
ZONE1
COM
NO
NC
ZONE2
COM
NO
NC
ZONE3
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
AC24VL
LWCO
R
W
C
R
W
C
R
W
C
R
W
C
COM
A/H DHW PRI
NO NC N L N L
N
L
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S Zone5 T/S
Zone6 T/S
Zone1 Pump Zone2 pump Zone3 Pump Zone4 Pump Zone5 Pump Zone6 Pump
T/T
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
R
W
C
R
W
C
R
W
C
R
W
C
Generic Zone Controller
<NFB>
Boiler Pump
(max. 2.5 A)
COM
NO
NC
ZONE1
COM
NO
NC
ZONE2
COM
NO
NC
ZONE3
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
AC24VL
LWCO
R
W
C
R
W
C
R
W
C
R
W
C
COM
A/H DHWPRI
NO NC N L N L
N
L
COM NO NC N L N L
N
L
Pump Ground
3.6.7 Wiring Diagram - Generic Zone System with
Zone Valves
COM
NO
NC
ZONE1
COM
NO
NC
ZONE2
COM
NO
NC
ZONE3
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
AC24VL
LWCO
R
W
C
R
W
C
R
W
C
R
W
C
COM
A/H DHW PRI
NO NC N L N L
N
L
Zone1 T/S Zone2 T/S Zone3 T/S Zone4 T/S Zone5 T/S
Zone6 T/S
Zone1 Valve Zone2 Valve Zone3 Valve Zone4 Valve Zone5 Valve Zone6 Valve
T/T
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
R
W
C
R
W
C
R
W
C
R
W
C
Generic Zone Controller
<NFB>
<NFB>
System Pump
(max. 2.5 A)
Boiler Pump
(max. 2.5 A)
COM
NO
NC
ZONE1
COM
NO
NC
ZONE2
COM
NO
NC
ZONE3
AC24VN
SUPPLY RETURN OUTDOOR DHW TANK
AC24VL
LWCO
R
W
C
R
W
C
R
W
C
R
W
C
COM
A/H DHWPRI
NO NC N L N L
N
L
COM NO NC N L N L
N
L
Pump Ground

Navien NFB Series Specifications

General

Type	Condensing Boiler
Fuel Type	Natural Gas or Propane
Heat Exchanger	Stainless Steel
Vent Type	Direct Vent
Vent Diameter	2" or 3"