Navien NHB H Series User Manual

128 Appendixes
12.2 Wiring Diagram
Cascade Line(RS-485)
CNB1
CNG1 CNF1
CNK1
Water Pressure Sensor
Main Gas Valve1
Main Gas Valve2
Burner
Flame Rod
Igniter
CNA1
CNI1
Ground
CNR1
Dual
Venturi
CNO1
CON1
Power Trans
NHB-H
(24V 75VA)
*T/S: Thermostat **Temp: Temperature ***Factory jumper is connected as default.
Remove it when using an additional appliance.
Front Panel
Fan
Fuse
(250V 3.15A)
AC24V
T/S INPUT
*T/S_3
ZONE3
ZONE2
ZONE1 DHW
AC24V
T/S INPUT
*T/S_2
AC24V
T/S INPUT
*T/S_1
AC24V
T/S INPUT
*T/S_4(DHW)
CNT1 CNT2 CNT3 CNT4
SUPPLY RETURN OUTDOOR
DHW
TANK
System Supply **Temp Sensor
System Return **Temp Sensor
Outdoor **Temp Sensor
DHW Tank **Temp Sensor
rosneSpmeT**ylppuS
timiLpmeThgiH
)renruB(
rosneSpmeT**nruteR
rosneSpmeT**1tsuahxE
rosneSpmeT**2tsuahxE
rosneSerusserPriA
timiLpmeThgiH
CNJ1
CND1
Vent Installation
Detector
CNV3 CNV2 CNV1CNC3
ZONE3LWCO
ZONE2
ZONE1
***LWCO
LWCO
AC24V
AC24V
AC24V
AC24V
CNC4 CNC5
CNC6
CNC1
Zone
Valve1
Zone
Valve2
Zone
Valve3
CNC2
ON
OFF
Boiler Pump FUSE
(250VAC_10A)
ZONE3 Pump FUSE
(250VAC_10A)
ZONE2 Pump FUSE
(250VAC_10A)
ZONE1 Pump FUSE
(250VAC_10A)
DHW Priority
Air Handler
Boiler
Pump
CND1
CNP1 CNP2
CNA1
AC_N
ZONE1 Pump
(DHW TANK)
ZONE2 Pump
ZONE3 Pump
(SYSTEM)
AC_L
AC_N
AC_L
AC_N
AC_L
Ground
Ground Ground Ground Ground
WARNING
ELECTRICAL SHOCK HAZARD
NOTICE
Ground
Main Switch
(AC)
External Input (AC 120V)
AC_L
CNX1
External Pump
AC_L
IN
OUT
N
L
CON2CON1
Fuse
(125V 20A)
AC_N
Pumps must be electrically grounded as required
by National Electrical Code.
For your safety, turn o electrical power supply before making any electrical connections to avoid possible electric hazrd. Failure to do so can cause severe personal injury or death.
IN
OUT
IN
OUT
IN
OUT
IN
OUT

Navien NHB H Series Specifications

General

Brand	Navien
Model	NHB H Series
Category	Boiler
Language	English