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ETERNITY 26 - User Manual

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1
INSTALLATION GUIDE
FOR EXTERNAL INSTALLATION ONLY
Eternity
GAS WATER HEATERS
M
O
DEL
S
1
6
-1
8
-2
0
-24-2
6

Table of Contents

Questions and Answers

  • A
    Adrian Barker DVMAug 13, 2025
    What to do if there is no hot water from my ETERNITY Water Heater?
    • Y
      ywongAug 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).
  • A
    Alicia JonesAug 17, 2025
    Why does the hot water from my ETERNITY Water Heater get cold?
    • S
      Samantha KochAug 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.
  • T
    Tiffany DukeAug 21, 2025
    Why is the water from my ETERNITY Water Heater not hot enough?
    • W
      wattstravisAug 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.
  • D
    Debra RiveraAug 25, 2025
    Why is there fluctuation in hot water temperature from my ETERNITY Water Heater?
    • W
      William NelsonAug 26, 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.
  • A
    Amanda HowellAug 29, 2025
    What to do if my ETERNITY Water Heater does not ignite?
    • J
      Julie HallAug 29, 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.
  • B
    Bradley WilliamsSep 1, 2025
    How to fix ETERNITY Water Heater remote controller when it does not display anything?
    • M
      Melissa DominguezSep 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.
  • W
    William NguyenSep 5, 2025
    Why is the water from my ETERNITY Water Heater too hot?
    • J
      Jason HowellSep 5, 2025
      If the water from your ETERNITY Water Heater is too hot, check if the set temperature is set too high.
  • S
    Sandra BishopSep 9, 2025
    What to do if the remote controller can not change the set temperature on my ETERNITY Water Heater?
    • K
      Kayla HartSep 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.

Summary

Important Information

For the Installer

Installation must follow this guide and relevant national, state, or local regulations.

For the Servicer

Maintenance and fault-finding must follow instructions and applicable regulations.

Installer Qualification Warning

Plumber Specific Instructions

Technical Specifications

Performance at Low Pressure

Appliance operates at reduced performance below 340 kPa.

High Altitude Installation

Contact manufacturer for instructions before installing above 1500m sea level.

Introduction to the Water Heater

Unit Description

The water heater is an instantaneous, tankless unit designed to supply endless hot water.

Operating Principle

Explains the step-by-step process of how the water heater operates from tap activation to shutdown.

Included Accessories

Dimensions and Connection Points

Safety Guidelines

Installer Qualification and Regulations

Installation and service must be by qualified installers, complying with all relevant regulations.

General Installation Precautions

Plan installation for air, ventilation, and leakage, check rating plate, and consult manufacturer if issues arise.

Critical Safety Warnings

Warnings on scalding, flammables, water immersion, and freeze prevention system operation.

Installation Requirements

Confirm Appliance Suitability

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

Installation Cautions and Considerations

Cautions regarding pool heating, water hardness, voiding warranty, manifold pressure, occupants, earthing, and proximity.

Selecting an Installation Location

Location Cautions

Cautions about water heating only, noise impact, and planning for potential leakage.

Location Warnings and Requirements

Warnings on hazards, air supply, ventilation, cleanliness, access, outdoor installation, and avoiding pits.

Clearances for Outdoor Heater Locations (AS5601)

Gas Connections

Gas Connection Safety Precautions

Turn off power before connecting gas. Confirm gas inlet position and avoid connecting water to gas.

Gas Sizing and Connecting

Check gas type, pressure, size piping per AS5601, use approved connectors, purge lines, install shut-off valve.

Gas Conversion and Regulator Warning

Field conversion is not possible. Regulator is factory set and not user adjustable.

Measuring Inlet Gas Pressure and Leak Testing

Gas Line Isolation During Testing

Isolate appliance and shut-off valve from the gas supply piping during pressure testing above 3kPa.

Water Connections

Water Connection Reversal Warning

Do not reverse hot outlet and cold supply lines to avoid improper operation.

Water Connection Requirements and Best Practices

Use potable water system components, install shut-off valves, flush lines, and clean the filter.

Cold Water Inlet Filter Maintenance

The filter must be cleaned as part of regular maintenance for proper operation.

Electrical Connections

Electrical Connection Requirements

Ensure proper grounding, use 240V 50Hz supply, locate weatherproof point, and ensure switch-off capability.

Electrical Servicing Warning

Label wires before disconnecting during servicing to ensure correct reconnection and avoid dangerous operation.

Optional Remote Controller

Remote Controller Functions and Diagnostics

Covers controller functions, error codes, diagnostic capabilities, and priority settings.

Remote Controller Models and Operation

Details MC100-AU3, FC100W-AU3, SC100-AU3 models, their ranges, and specific operational notes.

Remote Controller Installation

Remote Controller Wiring and Mounting

Instructions for crimping terminals, wiring, and securely mounting the remote control unit.

Remote Controller Location Warnings

Do not locate controls near water, chemicals, cookers, or where spills may occur. Use insulation plate if on metal surface.

Connecting Remote Controller Wiring to Water Heater

Wiring Connection Procedure

Steps for connecting remote control wires to the water heater, including power off and cover removal.

Short Circuiting Warning

Do not jump or short-circuit wires, as this will damage the computer.

Initial Operation

Safety Before Initial Operation

Read safety information, check connections, pressure, venting, purge lines, and do not use if submerged.

Action if Gas is Smelled

If gas is smelled, do not start, do not use electronics, call gas supplier or fire department.

Initial Operation Steps

Steps for initial start-up including cleaning filter, opening valves, and turning on power.

Normal Operation

Operational Flow Rates

Specifies activation flow rate (3.0 l/min) and running flow rate (2.5 l/min).

Operation Without Remote Controller

Instructions for operating the heater without a remote controller, including temperature mixing.

Operation with Main Remote Controller (MC100-AU3)

Steps for operating the heater with the MC100-AU3 controller, including setting temperature and checking burner status.

Operation with Multiple Remote Controllers

Setting and Managing Priority

Set temperature via priority unit; transfer priority by pressing button when no water is flowing.

Multiple Controller Operation and Storage

Steps for operation, individual temperature storage, and notes on priority transfer effects.

Scalding Hazard Warning

Water temperatures above 50°C can cause severe burns or death from scalding.

Freeze Prevention

Freeze Prevention System Overview

The unit has heaters to prevent freezing, requiring electrical power and rated for -15°C in wind-free environments.

Pipe Protection Caution

Pipe heaters protect the unit only. External pipes require separate protection and insulation.

Winter Shutdown Procedure

Procedure for shutting down and draining the unit to prevent freezing damage during prolonged periods or extreme cold.

Maintenance and Service

Service Safety Precautions

Turn off electrical power and gas/water valves before performing any servicing or maintenance.

Maintenance Tasks and Checks

Includes cleaning cold-water inlet filter, checking air openings, exhaust, gas pressure, and clearing the area.

Unit Draining and Filter Cleaning Procedure

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

General Troubleshooting

Troubleshooting: Temperature and Hot Water Amount

Addresses issues like slow hot water delivery, insufficient heat, excessive heat, and no hot water.

Troubleshooting: Water Heater Operation

Troubleshooting: Remote Controller

PCB Error Codes

Wiring Diagram

Dipswitch Configuration Note

Note regarding dipswitch settings: only change black switches; do not touch others.

Operating Safety

Safety Before Operation

Crucial safety warnings regarding fire, explosion, gas leaks, and use after water immersion.

Operating Instructions

Step-by-step guide for safe operation, including checking gas, power, and turning on/off the unit.

Turning Off Gas to Appliance

Procedure for safely turning off the gas supply to the appliance, typically for service.

Critical Safety Hazards

Flammable Vapors and Products

Warnings regarding flammable vapors, product storage, handling, and properties to prevent fire/explosion.

Hot Water Scalding Risks

Information on high water temperatures causing burns/death, especially for vulnerable groups, and testing recommendations.

Water Flow and Temperature Charts

Flow Rate and Temperature Determination

Outlet temperature and supply water temperature determine the unit's flow rate output; use charts for planning.

Maximum Flow Rate Limits

The flow rate is limited to a maximum of 26.0 (or 20.0) l/min depending on the model.

Warranty Conditions

ETERNITY 26 Specifications

General IconGeneral
BrandETERNITY
Model26
CategoryWater Heater
LanguageEnglish

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