Ladder Diagram - Navien CH-180 Installation Manual

Ladder Diagram:

HOT NEUTRAL
120VAC
Power
Switch
Transformer
Primary
Secondary
150VAC
15VDC
19VAC
24VDC
26VAC
5VDC
9VAC
Floe Sensor
APS
WPS
GPS
Fan
Hall Sensor
Thermistat MCU 1
H/W
Thermostat
C/W
Thermostat
S/H Return
Thermostat
S/H Supply
Thermostat
Thermostat
High Limit
S/W
Exhaust
Limit S/W
Relay 1 Power Supply
Relay 2
Relay 3
Relay 4
Relay 5
Relay 6
Relay 7
Relay 8
Relay 9
Relay 10
FAN
Speed Control
Flame rod
WD-RSS
Modulating
GV
Relay Power Supply
Driving Circuit
Relay 2
Relay 3
Relay 4
Remote Controller
Remote
Controller
Interfaace
MGV
SGV1
SGV2
Mode Selecttion
lagniter
Pump
AWS
3-Way V/V
External Power
Communication
interface
MCU 2
Relay 1
Relay 2
Relay 6
Relay 7
Relay 8
Relay 9
Relay 10
Remote Controller
Ready
Interfaace Link
67