Rinnai i120CN User Manual

Rinnai I-Series Condensing Boiler Combi Manual
Central Heang and Domesc Hot Water
INSTALLATION AND OPERATION MANUAL
I-Series Condensing Boiler
Wall-Mounted, Gas-Fired Combi Boiler
Cered to ANSI Z21.13
and CSA 4.9
COMBI MODELS
i060C (REB-A1847FF-US)
i090C (REB-A2647FF-US)
i120C (REB-A3558FF-US)
READ AND SAVE THIS MANUAL
If the informaon in these instrucons are not followed exactly, a re or explosion may
result causing property damage, personal injury, or loss of life.
 Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any other appliance.
 WHAT TO DO IF YOU SMELL GAS
 Do not try to light any appliance.
 Do not touch any electrical switch; do not use any phone in your building.
 Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instrucons.
 If you cannot reach your gas supplier, call the re department.
 Installaon and service must be performed by a qualied installer, service agency or the gas supplier.
WARNING
K H167-0771-1(00)

Rinnai i120CN Specifications

General

Brand	Rinnai
Model	i120CN
Category	Boiler
Language	English

Summary

Rinnai I-Series Condensing Boiler Installation and Operation Manual

Boiler Overview and Model Information

Introduction to the Rinnai I-Series boiler, its type and core functions, including available combi models.

1 Welcome

Installer Requirements

Specifies qualifications, skills, and responsibilities for installing professionals.

2 Safety

Safety Symbols and Alerts

Explanation of safety symbols used in the manual for hazard identification.

General Safety Precautions

Critical safety guidelines for boiler installation, operation, and maintenance.

4 Installation

Installation Guidelines

General rules, codes, and requirements for correct boiler installation.

5 Venting

Venting Guidelines and Sequence

6 Gas Supply

Gas Supply Connection

Procedures and safety measures for connecting the gas supply line.

Gas Operation

Steps for safely starting and operating the boiler using gas fuel.

9 Power Supply

Power Supply Guidelines

Electrical Connections

Details on connecting external devices to the boiler's PC board.

10 Commissioning

Commissioning Process Overview

Safety, filling, and deaeration procedures for boiler commissioning.

11 Post-Installation Checklist

Installation Verification

12 Operation

Start-Up and System Operation

Information for initial startup, system pressurization, and air removal.

Control Panel Functions

Basic Operation Settings

Parameter Settings

Guide to accessing and modifying operational parameters via the PC board and controller.

Outdoor Reset Control

Explanation of how outdoor temperature influences boiler heating output.

DHW Recirculation and Simultaneous Operation

Diagnostic Codes and Troubleshooting

List of diagnostic codes, their meanings, and troubleshooting steps.

13 Maintenance

Owner Maintenance Tasks

Professional Maintenance Procedures

Annual maintenance tasks for vent system, fans, filters, and pressure relief valve.

Ignition Safety Test

Procedure for testing the ignition system's safety shut-off functionality.

14 Appendices

Gas Conversion

Step-by-step guide for converting the boiler from natural gas to propane.

Wiring and Control Diagrams

Limited Warranty