Ladder Diagram - Navien NR-180 Installation Manual

Navien Gas Water Heater Installation

█ Ladder Diagram:

NR-A
HOT NEUTRAL
120VAC
Power
Switch
Transformer
Primary
Secondary
AC150V
AC19V DC15V
AC26V DC24V
DC5V
AC9V
Flow Sensor
APS
GPS
Fan
Hall Sensor
MCU 1
Water Leakage
Detection
H/E
Thermostat
C/W
Thermostat
H/W
Thermostat
High Limit S/W
Exhaust Limit S/W
Relay 1
MGV
Relay 2
SGV 1
Relay 3
SGV 2
Relay 4
Igniter
Relay 6
Pump
Relay 7
FAN
Speed Control
Water Adjustment
Valve
Flow Control
Flame rod
WD-RSS
Modulation
MCU2 Pulse
GV
Signal
Relay Power Supply
Driving Circuit
Relay 1
Relay 2
Relay 3
Relay 4
Relay 6
Relay 7
Remote
Remote Controller
Controller
Interface
MCU 2
Ready Link
Ready Link
Interface
61