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Rinnai INFINITY 18 REU-V2018W User Manual

Rinnai INFINITY 18 REU-V2018W
65 pages
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INFINITY 16 REU-V1616W
V1200 REU-V1620W
INFINITY 18 REU-V2018W
INFINITY 20 REU-V2020W
Rinnai High Capacity Continuous Flow Gas Hot Water System
NOTE: This manual does not apply to models: REU-V1620WG, REU-V1620WB, REU-V2024WG, REU-V2024WE,
REU-V2426WB, REU-V2626WG, REU-VM2630WD, REU-VM2630WC, REU-V2632FFUG, REU-VM2632FFUC
SERVICE MANUAL
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Rinnai INFINITY 18 REU-V2018W Specifications

General IconGeneral
ModelINFINITY 18 REU-V2018W
CategoryGas Heater
TypeContinuous Flow
Maximum Flow Rate18 L/min
Ignition SystemElectronic Ignition
Energy Star CertifiedYes
Gas TypeNatural Gas
Temperature Range60°C
Warranty3 years

Summary

Rinnai INFINITY Service Manual

Safety Warnings and Precautions

General Safety Compliance

General warning about complying with instructions for safety.

Electrical Safety Warning

Warning regarding high voltage wiring within the appliance.

Authorized Service Personnel Requirement

Instruction that all service work must be done by authorized personnel.

Gas Leak Testing Prohibition

Warning against testing for gas leaks with an open flame.

7. Operational Flow Chart

Normal Operation Flow

Details the step-by-step operational sequence for normal conditions.

Ignition and Failure Flow Chart

Flow chart illustrating ignition sequence and failure modes.

Abnormal Pre-Purge Flow Chart

Flow chart for air supply or exhaust blockage issues.

9. Main Components Description

Printed Circuit Board (PCB) Function

Explains the role of the PCB in controlling all operational functions.

Gas Flow Control Mechanism

Describes how gas flow is regulated for temperature control.

Water Flow Control Mechanism

Explains how water flow is detected and controlled.

Controller Installation Configurations

Remote Control Cable Connection Steps

Step-by-step guide for connecting remote control cables.

Connecting Multiple Controllers

Procedure for Three Controllers

Steps for connecting three remote controllers to the appliance.

Kitchen Controller Programming for Temperature

Instructions to program the kitchen controller for temperature settings.

12. Wiring Diagram

Electrical Wiring Schematic

Diagram illustrating the appliance's electrical wiring.

14. Fault Finding Guide

Fault Diagnosis Flowchart

A flowchart guiding the process of diagnosing faults.

Fault Finding Table

Ignition and Combustion Faults

Covers faults related to ignition, flame, and combustion fan.

Sensor and Temperature Faults

Addresses faults related to thermistors and overheat switches.

Control and Valve Faults

Details faults concerning control circuits and solenoid valves.

General Appliance and Wiring Faults

Covers appliance non-operation, wiring, and temperature adjustment faults.

16. Component and Circuit Checks

Combustion Fan and Sparker Circuit Checks

Procedures to check the combustion fan, its sensor, and the sparker.

Main Solenoid Valve (SV1) Circuit Checks

Procedures to check the main solenoid valve circuit.

Component and Circuit Checks (Continued)

Solenoid Valve 2 (SV3) and Modulating Valve Circuit Checks

Procedures to check solenoid valve 2 and the modulating valve circuits.

Flame Rod, Earth Lead, and Thermal Fuse Circuit Checks

Procedures to check the flame rod, earth lead, and thermal fuse circuits.

Overheat Switch and Water Flow Sensor Circuit Checks

Procedures to check overheat switch and water flow sensor circuits.

Outlet Thermistor and Surge Protector Circuit Checks

Procedures to check outlet thermistor and surge protector circuits.

Remote Control and Anti-frost Heater Circuit Checks

Procedures to check remote control and anti-frost heater circuits.

Water Flow Servo Circuit Checks

Procedures to check the water flow servo circuit.

18. Maintenance Monitor / Error History

Wireless Controller Maintenance Function

How to access maintenance and error history via wireless controller.

Displaying Maintenance Information Steps

Step-by-step guide to view maintenance data on the controller.

Error History Display

Displaying Error Memory (History)

Instructions on how to view the last 10 recorded faults.

Error Code Sequence Display

Explains how error codes and sequence are shown on the display.

Gas Pressure Setting Procedure

Regulator and Combustion Settings

Adjusting regulator and setting dip switches for combustion.

Pressure Checks and Adjustments

Checking test point pressure and adjusting the POT.

Final Steps and Safety Warnings

Setting for normal combustion, final checks, and warnings.

19. Gas Conversion Procedure

Conversion Method Overview

General steps for converting the appliance to a different gas type.

Manifold Replacement and Reconnection Steps

Detailed steps for manifold replacement and component reconnection.

Final Checks and Installation Procedures

Final checks, connection to services, and pressure settings.

20. Dismantling for Service

Dismantling Safety Precautions

Essential safety precautions before dismantling the appliance.

Component Dismantling Procedures

Front Panel and PCB Unit Removal Steps

Steps for removing the front panel and PCB unit.

Component Dismantling Procedures (Continued)

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