Navien NPE-180A Guide D'installation page 59

Secondary
58 Annexes
HOT NEUTRAL
EMI
FILTER
PWM
Primary
Primary
SMPS
DC15V
DC24V
DC12V
DC5V
Flow Sensor
APS
Fan
Hall Sensor
Outlet
Thermistor 1
Outlet
MCU 1
Thermistor 2
Inlet
Thermistor 1
Inlet
Thermistor 2
Exhaust
Thermistor
[NPE-150S/180S/210S/240S]
EXT_PUMP
Relay 1
* NPE-180S/ 210S/ 240S only
VENTURI
Relay 2
Relay 3
IGNITER
Relay 4
PUMP
FAN
Speed Control
Water Mixing
Water Adjust
Valve
Valve
H.T.L
WD-PSS
Driving Circuit
Communication
Interface
UART
Communication
Interface
Ready Link
Interface
200V
FSA Power
Switch
Flame Rod
Relay 3
MGV1 MCU 2
MGV2
Relay 1
Relay 2
Relay 4
FRONT
PANEL
Ready Link