Navien NPE-240A Installation Manual page 50

Primary
Secondary
50 Appendixes
HOT NEUTRAL
EMI
FILTER
PWM
Primary
SMPS
DC15V
DC24V
DC12V
DC5V
Water Adjust
Valve
Flow Sensor
APS
Fan
Hall Sensor
Outlet
Thermistor 1
Outlet
MCU 1
Thermistor 2
Inlet
Thermistor 1
Inlet
Thermistor 2
Exhaust
Thermistor
[NPE-180S/ 210S/ 240S]
EXT_PUMP
Relay 1
VENTURI
Relay 2
Relay 3 IGNITER
Relay 4 PUMP
FAN
Speed Control
Water Mixing
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