Ladder Diagram

HOT

NEUTRAL

3A(FUSE)

FROST SENSING

SWITCH

ARRESTER

ANTI-FROST HEATER

 

VARISTOR

VARISTOR

GND

RELAY 1

IG

IGNITION

 

 

E

SWITCHING

POWER SUPPLY

 

PG

 

DC170V

DC12V

 

 

 

DC12.6V

DC40V

 

 

 

DC5V

 

 

 

A

B

C SG

WATERFLOW

A

 

B

 

SENSOR

 

 

 

 

QS

WATERFLOW

 

 

 

SENSOR

 

 

 

 

CIRCUIT

 

 

 

WATERFLOW

A

SG

 

 

CONTROLDEVICE

 

 

 

 

M

WATERFLOW

 

 

 

CONTROL DEVICE

 

 

 

CIRCUIT

 

CPU

BY-PASSFLOW

A

SG

 

 

CONTROL DEVICE

BY-PASS FLOW

CENTRAL

 

M

PROCESSING

CONTROL DEVICE

UNIT

 

 

CIRCUIT

 

 

 

BY-PASS SERVOMODEL ONLY

SG

 

 

A

RELAY 1

RELAY

 

 

DRIVING

 

 

 

CIRCUIT

 

THERMAL FUSE

SV0

 

 

 

SV1

SOLENOID

 

 

DRIVING

 

OVER HEAT

 

CIRCUIT

 

SWITCH

SV2

 

 

 

 

SV3

 

 

 

OUTGOING WATER

B

SG

 

THERMISTOR

 

 

 

 

HEAT EXCHANGER

 

 

 

THERMISTOR

THERMISTOR

 

 

 

 

CIRCUIT

 

 

AIR TEMPERATURE

 

 

 

THERMISTOR

 

 

SG

 

 

 

 

 

INDOOR MODEL ONLY

 

SG

 

 

 

 

 

 

D

A B C

MODULATING VALVEPOWER CONTROL CIRCUIT

SG

D E

FAN

CONTROL

CIRCUIT

PG

A

FLAME DETECTING CIRCUIT

SG

GND

A B

REMOTE CONTROLLER CIRCUIT

SG

MODULATING

SOLENOID

VALVE

POV

COMBUSTION

FAN

FAN

FLAME ROD

FR

REMOTE

CONTROLLER

VA Series Indoor LS Manual

41

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Image 41
Rinnai REU-VA3237FFU installation manual Ladder Diagram, Hot

REU-VA3237FFU specifications

The Rinnai REU-VA3237FFU is a high-efficiency gas continuous flow water heater designed to provide instant hot water on demand. It is particularly well-suited for households that require a reliable source of hot water while maximizing energy savings. This unit boasts impressive features that set it apart in the market, catering to both residential and commercial applications.

One of the standout characteristics of the REU-VA3237FFU is its energy-efficient design. With an impressive energy factor of 0.89, this model delivers exceptional performance, maximizing energy use and minimizing waste. The continuous flow technology means that there is virtually no wait time for hot water, making it ideal for busy households with multiple points of use.

The REU-VA3237FFU employs advanced temperature control technology. It features an intelligent digital controller that allows users to easily set their desired water temperature. This ensures consistent delivery of hot water at the desired temperature, enhancing comfort while also promoting safety by reducing the risk of scalding. The model also incorporates a safety lock function that can prevent accidental changes to the temperature setting.

In terms of durability and design, the Rinnai REU-VA3237FFU showcases high-quality build materials that contribute to its longevity. The stainless steel heat exchanger is resistant to corrosion, ensuring a long life expectancy and reliable performance over time. Additionally, the compact design makes it easy to install in tight spaces, whether indoors or outdoors, adapting to various installation environments.

Moreover, the Rinnai REU-VA3237FFU features a low NOx emission system, aligning with environmental standards and regulations. This eco-friendly technology makes it an excellent choice for environmentally conscious consumers looking to reduce their carbon footprint while enjoying the benefits of modern hot water systems.

The Rinnai REU-VA3237FFU is also equipped with a self-diagnostic system, which allows for easier maintenance and troubleshooting. This feature increases the unit's reliability by monitoring its performance and alerting users to any potential issues before they develop into significant problems.

In summary, the Rinnai REU-VA3237FFU is a standout continuous flow water heater that combines energy efficiency, durability, and advanced technology. With its smart temperature control, compact design, and environmentally friendly features, it is an outstanding choice for anyone seeking a dependable and efficient hot water solution.