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Rheem 18 User Manual

Rheem 18
80 pages
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This water heater must be installed and serviced by an authorised person.
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Owner’s Guide
and
Installation Instructions
Electronic Continuous Flow
Gas Water Heater
874, 876 series
018, 020 models

Table of Contents

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Rheem 18 Specifications

General IconGeneral
BrandRheem
Model18
CategoryWater Heater
LanguageEnglish

Summary

About Your Water Heater

Model Type and Operation

Details about the water heater model, its operation, and gas boosting for solar systems.

Mains Pressure and Water Temperature

Information on mains water pressure, desired water temperature, and scald risk.

Safety and Holiday Precautions

General safety warnings, electrical safety, and advice for going on holidays.

Maintenance and Frost Protection

Covers general maintenance, servicing, frost protection, and draining procedures.

Temperature Control

Controller Overview and Types

Introduces standard and deluxe controllers, their types, and basic functions.

Standard Controller Operation

Explains standard controller buttons, lights, display, and basic operation.

Standard Controller Settings and Adjustment

Details temperature settings, adjustment procedures, and controller limitations.

Deluxe Controller Functions and Operation

Details deluxe controller functions, voice prompts, and temperature adjustment.

Deluxe Controller Special Modes

Covers Bath Fill mode and related functions for deluxe controllers.

Save A Service Call

Troubleshooting: No Display or Cold Water

Guides users on resolving issues like no display on the controller or cold water from the tap.

Troubleshooting: Hot Water Issues

Addresses problems with water being too hot, not hot enough, or fluctuating flow.

Error Codes and Gas Bill Concerns

Explains how to interpret error codes and addresses concerns about high gas bills.

Installation - Water Heater

Location, Clearances, and Requirements

Specifies where to install the water heater, required clearances, and general installation standards.

Mains Supply and Protection Measures

Covers mains pressure, frost protection, pipe covers, and recess installation.

Hot Water Delivery and Limiting Devices

Details hot water delivery, scald risk, temperature limiting devices, and diagrams.

Technical Data and Dimensions

Provides dimensions, technical data, and specifications for the water heater models.

Connections - Plumbing

Plumbing Connection Sizes

Specifies connection sizes for hot water, cold water, and gas inlet.

Water and Gas Inlet/Outlet Procedures

Details pipe work, valves, gas inlet, and specific connection procedures.

Connections - Electrical

Electrical Installation and Power

Covers electrical work requirements, power supply, and the heater's power consumption.

Ez-Link System Dual Installation

System Overview and Requirements

Explains the Ez-Link system for dual water heater control and required components.

Dual Installation Principles and Labeling

Outlines installation principles, label placement, and controller requirements for dual units.

Ez-Link Cable Connection Procedure

Step-by-step guide for connecting the Ez-Link cable between water heaters.

Installation - Controllers

Controller Types and Locations

Introduces controller types (Standard/Deluxe), their functions, and suitable installation locations.

Kitchen Controller Installation

Covers installation steps for kitchen controllers, including components and base plate.

Bathroom Controller Installation

Details installation for bathroom controllers, including components and foam packing.

Connecting Controllers to Water Heater

Explains the final steps to connect the installed controllers to the water heater.

Commissioning

Initial Startup and Gas Pressure Checks

Covers turning on the heater, gas inlet pressure testing, and initial checks.

Burner Gas Pressure Adjustment

Details procedures for checking and adjusting minimum and maximum burner gas pressures.

Preset Temperature Settings and Adjustment

Explains how to check/adjust the factory preset outlet temperature settings.

Turning Off the Water Heater

Provides instructions on how to properly turn off the water heater.

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