Ladder Diagram - Rinnai EX38DT Installation And Operation Manual

9.3 Ladder Diagram

A: DC5V
B: DC12V
MS
C: DC15V
R.TH
D: DC24V
E: DC170V
TF1,2
F: AC24V
F
ER
POV
FR1,2
CF
FM
Figure 65: Ladder Diagram
EX38DT Installation and Operation Manual
Mark Parts Name
Main Switch
Room Thermistor
Thermal Fuse 1, 2
Fuse
Electrode
Modulating Solenoid Valve
Flame Rod 1, 2
Convection Fan
Convection Fan Motor
Mark Parts Name
SP Sparker
OH.TH1,2 Over Heat Thermistor 1, 2
SV1~3 Solenoid Valve 1~3
BL Combustion Fan Motor
FCC Fan Control Circuit
Main CPU Central Processing Unit
Sub CPU Central Processing Unit for Safety
B1~4 Burner 1~4
PS Pressure Sensor
W.TH Wall Thermostat
53