Ladder Diagram - Navien NCB-180 Service Manual
Condensing boiler
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Also See for NCB-180:
- Installation & operation manual (77 pages) ,
- User's information manual (26 pages) ,
- Quick installation manual (4 pages)
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4.7 Ladder Diagram
Primary
Secondary
56
NCB Service Manual
NEUTRAL
HOT
Relay 1
EMI
FILTER
Relay 2
Relay 3
Relay 4
Relay 5
Auto Water
Supplement
Flow Sensor
APS
Fan
Hall Sensor
DHW Inlet
Thermistor 1
DHW Outlet
Thermistor 2
Heating Supply
Thermistor 1
Heating Return
Themistor
Exhaust
Thermistor
Outdoor
Thermistor
WPS
Flow Sensor
Thermostat
LWCO
VENTURI
IGNITER
PUMP
3 WAY
FAN
Speed Control
Driving Circuit
Relay 3
Relay 1
Relay 2
Relay 4
Relay 5
Communication
Interface
UART
FRONT
Communication
Interface
PANEL
Ready Link
Ready Link
Interface
Air Handler
Flame Rod
Output
Version 1.0
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Troubleshooting
