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Navien NCB500-2S/37K User Manual

Navien NCB500-2S/37K
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System Details 39
4.6 Ladder Diagram
Relay 1
Relay 2
Igniter
Circulation Pump
Speed Control
Transformer
Primary
Secondary
MCU 1
MCU 2
Flame rod
WD-RSS
DC24V
Relay 1
Relay 3
Driving Circuit
Flow Sensor
WPS
DC12V
Fan
Hall Sensor
BLDC-FAN
Water Adjustment
Valve
Flow Control
DC15V
Vent
Separation
Detector
Supply
Thermistor
Outlet
Thermistor 1
Return
Thermistor
UART
Communication
Interface
FRONT
PANEL
Communication
Interface
FUSE
Inlet
Thermistor 1
EMI
FILTER
PWM
NCB500 Combi Series
Only
DC 5V
Flow Control
3WAY
Relay 3
AC
Trans
130V
Relay 2
Exhaust
Thermistor
HTL switch
Buner
Outlet
Thermistor 2
ROOM Controller
DC 9V
HTL switch
Heat Exchanger
GAS V/V1
DC30V
Mixing
Valve
Outdoor
Thermistor
Low water
Pressure switch

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Navien NCB500-2S/37K Specifications

General IconGeneral
BrandNavien
ModelNCB500-2S/37K
CategoryBoiler
LanguageEnglish

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