ETERNITY 18 User Manual (English)

Questions and Answers:

M
Mary HughesAug 13, 2025
What to do if there is no hot water from my ETERNITY Water Heater?
- P
  paul96Aug 13, 2025
  If hot water isn't available from your ETERNITY Water Heater when you open a fixture, ensure the unit has a 240V 50Hz power supply. Also, check if the remote controller's power button is on. Verify that both the gas and water supply valves are fully open, and the filter on the cold water inlet is clean. Ensure the hot water fixture is open enough to draw at least 3.0l/min through the heater, and confirm the unit isn't frozen and that there's enough gas in the tank (for propane).
E
Erin ClarkAug 17, 2025
Why does the hot water from my ETERNITY Water Heater get cold?
- L
  lawrence65Aug 17, 2025
  If the hot water from your ETERNITY Water Heater gets cold and stays cold, make sure the flow rate is sufficient to keep the water heater running. Check that the gas supply valve is fully open and the filter on the cold water inlet is clean. Also, ensure that your fixtures are free of any debris or obstructions.
Q
qburnsAug 20, 2025
Why is the water from my ETERNITY Water Heater not hot enough?
- C
  Colin WrightAug 21, 2025
  If the water from your ETERNITY Water Heater is not hot enough, compare the flow and temperature. Check for cross plumbing between cold and hot water lines. Ensure the gas supply valve is fully open, the gas line is properly sized, and the gas supply pressure is adequate. Also, verify that the set temperature isn't set too low.
Y
ygillAug 25, 2025
Why is there fluctuation in hot water temperature from my ETERNITY Water Heater?
- G
  ggonzalezAug 25, 2025
  To address fluctuations in hot water temperature from your ETERNITY Water Heater, first ensure that the filter on the cold water inlet is clean. Also, check that the gas line is properly sized and that the supply gas pressure is sufficient. Finally, inspect for any cross-connections between the cold and hot water lines.
M
Martin MillsAug 28, 2025
What to do if my ETERNITY Water Heater does not ignite?
- J
  Jake BatesAug 28, 2025
  If your ETERNITY Water Heater doesn't ignite when water flows through it, verify that the flow rate is over 3.0l/min. Check the filter on the cold water inlet and inspect for reverse or cross-connections. If you're using a remote controller, ensure it's powered on.
L
lauren01Sep 1, 2025
How to fix ETERNITY Water Heater remote controller when it does not display anything?
- L
  Logan ChanSep 1, 2025
  To resolve the issue of the remote controller not displaying anything when turned on for your ETERNITY Water Heater, first press the ON/OFF button. If the lamp doesn't light, ensure the unit has a power supply and that the connection to the unit is correct.
K
Kimberly MendozaSep 5, 2025
Why is the water from my ETERNITY Water Heater too hot?
- S
  Scott KingSep 5, 2025
  If the water from your ETERNITY Water Heater is too hot, check if the set temperature is set too high.
M
Michael KingSep 8, 2025
What to do if the remote controller can not change the set temperature on my ETERNITY Water Heater?
- L
  landrytyroneSep 9, 2025
  If the remote controller for your ETERNITY Water Heater cannot change the set temperature, check if the priority lamp is lit. If not, press the priority button after closing all hot water taps.

ETERNITY 18 Specifications

General

Capacity	N/A (Tankless)
Material	Stainless Steel
Safety Features	Overheat Protection
Warranty	1 year
Gas Type	Natural Gas / LPG

Summary

Installation Guide

Important Information

For the Installer

Installation must follow guide and regulations.

For the Servicer

Maintenance and fault-finding must follow instructions and regulations.

Specifications

Introduction

Principle of Operation

Explains the basic working principle of the instantaneous water heater.

Accessories

Dimensions and Connection Points

Safety Guidelines

General Safety Precautions

Planning installation, checking rating plate, handling issues, and outdoor installation.

Burn and Scald Warnings

Warns about water temperatures above 50°C and risks to vulnerable individuals.

Flammable Liquids and Freezing Prevention

Advises against storing flammables and precautions regarding freezing.

Installation

Confirm Appliance Suitability

Verify gas type, pressure, water pressure, and electrical rating match application requirements.

Installation Cautions and Notes

Notes on equipment suitability, water hardness, water quality, warranty voidance, and placement.

Selecting an Installation Location

Location Precautions and Requirements

Advises on placement for sound, drainage, ventilation, access, and compliance with AS5601.

Structural Mounting Considerations

Discusses wall suitability and fastening methods for securing the unit.

Clearances for Outdoor Heater Locations – AS5601

Gas Connections

Sizing and Connecting Gas Lines

Guidelines for gas piping, connectors, shut-off valves, and leak testing.

Gas Conversion Warning

States that field conversion between natural gas and propane is not possible.

Measuring Inlet Gas Pressure and Testing Gas Leakage

Water Connections

Water Connection Safety and Component Use

Do not reverse connections; use potable water system components; avoid stop taps.

Cold Water Inlet Filter Maintenance

Instructions for cleaning the water filter located in the cold water inlet.

Electrical Connections

Electrical Safety and Grounding

Requirements for grounding, power supply, weather-proof point, and replacement cord.

Remote Controller Functions

Main Remote Controller MC100-AU3

Details on installation, temperature range, and specific operational notes for the main controller.

Shower and Ensuite Controllers FC100W-AU3 and SC100-AU3

Information on water resistance, installation locations, temperature ranges, and operational notes for shower/ensuite controllers.

Remote Controller Installation

Remote Control Installation Warnings

Cautions regarding water, chemicals, heat sources, spills, and metal surface mounting.

Connecting Remote Controller Wiring

Remote Control Cable Connections

Illustrates how to connect different remote controller models to the water heater.

Initial Operation

Pre-Operation Safety Checks

Critical checks for gas/water connections, gas pressure, venting, and purging lines.

Gas Leak Detection and Response

Immediate actions to take if a gas leak is detected.

Starting the Water Heater

Step-by-step guide for starting the water heater after installation checks.

Normal Operation

Operation Without Remote Controller

How to operate the water heater without a remote controller, including temperature setting adjustments.

Operation With Main Remote Controller (MC100-AU3)

Steps for operating the unit using the main remote controller for temperature adjustment.

Normal Operation with Multiple Remote Controllers

Priority Setting and Temperature Transfer

Explains how priority works and how temperature settings are transferred between controllers.

Freeze Prevention

Winter Shutdown Procedure

Instructions for draining the unit to prevent freezing during extended non-use or cold periods.

Restarting After Winter Shutdown

Steps to follow to safely restart the water heater after a winter shutdown.

Maintenance and Service

Servicing Safety Precautions

Warnings to turn off power and gas, and general safety checks before servicing.

Unit Draining and Filter Cleaning

Detailed steps for draining the unit and cleaning the cold-water inlet filter.

General Troubleshooting

Troubleshooting: Temperature and Hot Water Volume

Identifies common problems related to hot water temperature and volume, with possible solutions.

General Troubleshooting (Continued)

Troubleshooting: Ignition, Fan, and Remote Controller Issues

Addresses problems with unit ignition, fan operation, and remote controller functionality.

PCB Error Codes

Interpreting Error Codes

Explains how error codes are displayed and provides a chart linking PCB LEDs/remote codes to symptoms.

Wiring Diagram

Operating Safety

Pre-Operation Safety Warnings

Crucial safety warnings regarding ignition, gas smell, and handling the gas valve.

Operating Instructions and Gas Turn-off

Step-by-step guide for starting the unit and procedure for safely shutting off the gas supply.

Danger: Flammable Hazards

Flammable Liquids and Vapors Warning

Strong warnings about the explosion and fire hazards associated with flammable liquids and their vapors.

Danger: Hot Water Scalding Hazard

Alerts users to the severe burn risk from hot water temperatures above 50°C, especially for vulnerable individuals.

Water Flow and Temperature Charts

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