Rinnai Comprehensive Parts Diagrams and Lists for RL75I and RL94I Water Heaters

Ladder Diagram (for R98LSi and R98LSi-ASME)

HOT			NEUTRAL
3A(FUSE)	FROST SENSING
	SWITCH
ARRESTER			ANTI-FROST HEATER
VARISTOR	VARISTOR
GND	RELAY 1		IGNITION
		IG

	SWITCHING
	POWER SUPPLY
PG	DC170V	DC12V

E

D

DC12.6V DC40V DC5V

A B

WATERFLOW	A
SENSOR	WATERFLOW
QS
	SENSOR
	CIRCUIT

WATERFLOW	A	SG
CONTROLDEVICE	WATERFLOW
M
	CONTROLDEVICE
	CIRCUIT

BY-PASSFLOW	A	SG
CONTROLDEVICE	BY-PASSFLOW
M
	CONTROLDEVICE
	CIRCUIT

C	SG
B	A B	C
	MODULATING
	VALVEPOWER
	CONTROL
	CIRCUIT
	SG
CPU	D	E
CENTRAL
PROCESSING	FAN
UNIT
	CONTROL
	CIRCUIT

MODULATING SOLENOID VALVE

POV

COMBUSTION FAN

FAN

BY-PASS SERVOMODEL ONLY

A RELAY 1

SG

RELAY

DRIVING

CIRCUIT

PG

A

THERMALFUSE

SV0

SOLENOID

FLAME ROD

OVERHEAT	SV1
	SV2
SWITCH
	SV3

OUTGOING WATER

THERMISTOR

HEAT EXCHANGER

THERMISTOR

AIR TEMPERATURE

THERMISTOR

INDOOR MODEL ONLY

DRIVING

CIRCUIT

B SG

THERMISTOR CIRCUIT

SG

FLAME

DETECTING

CIRCUIT

SG

GND

A B

REMOTE

CONTROLLER

CIRCUIT

SG SG

FR

REMOTE CONTROLLER

VB Series Indoor LS Manual

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