Ladder Diagram - Navien NCB-150E Installation & Operation Manual

11.3 Ladder Diagram

Primary
Secondary
HOT NEUTRAL
EMI
FILTER
PWM
SMPS
DC15V
DC24V
DC12V
DC5V
Auto Water
Supplement
V/V
Flow Sensor
APS
Fan
Hall Sensor
DHW Inlet
Thermistor 1
DHW Outlet
Thermistor 2
Heating Supply
Thermistor 1
Heating Return MCU 1
Thermistor
Exhaust
Thermistor
Outdoor
Thermistor
WPS
Flow Sensor
Thermostat
LWCO
EXT_PUMP
Relay 1
Relay 2
VENTURI
Relay 3
IGNITER
Relay 4
PUMP
Relay 5
3 WAY
FAN
Speed Control
H.T.L
WD-PSS
Driving Circuit
Relay 3
MGV1
MGV2
Relay 1
Relay 2
Relay 4
Relay 5
Communication
Interface
UART
Communication
Interface
Ready Link
Interface
Air Handler
24V OUTPUT
220V
Flame Rod
MCU 2
FRONT
PANEL
Ready Link
Output
Appendixes
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