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Eternity Plus M20 - User Manual

Eternity Plus M20
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WaterMark
GMK10177
WMKA22451
Thank you very much for purchasing our water heater. Before installing and
operating your water heater, please read this manual carefully and keep it
for future reference.
INSTALLATION GUIDE
FOR EXTERNAL INSTALLATION ONLY
Eternity Plus
GAS WATER HEATERS
MODELS
M20 (JSW40-20VH)
M20-50 (JSW40-20VH-50)
M26 (JSW52-26VH)
M26-50 (JSW52-26VH-50)

Questions and Answers

  • V
    Vanessa RiveraJul 31, 2025
    Why is my Eternity Plus Water Heater water not hot enough?
    • D
      Danielle RothJul 31, 2025
      If your Eternity Plus Water Heater isn't producing hot enough water, several factors could be at play. You may need to check for cross-plumbing between the cold and hot water lines. Also, ensure the gas supply valve is fully open. The gas line and gas supply pressure should be properly sized and adequate, respectively. Lastly, verify that the set temperature isn't set too low.
  • W
    Walter VegaAug 4, 2025
    What to do if hot water is not available when a fixture is opened with Eternity Plus M20 Water Heater?
    • E
      emilykingAug 4, 2025
      If you're not getting any hot water from your Eternity Plus Water Heater when you open a fixture, consider these potential solutions: * Ensure the unit has a 240V 50Hz power supply. * If using a remote controller, check if it's powered on. * Confirm that both the gas and water supply valves are fully open. * Inspect the cold water inlet filter for cleanliness. * Make sure the hot water fixture is open sufficiently to allow at least 3.0l/min of water flow through the heater. * Check if the unit is frozen or if there's enough LPG in the bottle (for propane systems).
  • C
    Christopher SmithAug 8, 2025
    Why does hot water get cold and stay cold with Eternity Plus Water Heater?
    • P
      Paul DelacruzAug 9, 2025
      If the hot water from your Eternity Plus Water Heater suddenly turns cold and stays that way, here's what you can check: * Ensure the flow rate is sufficient to keep the water heater running. * Verify the gas supply valve is fully open. * Inspect the cold water inlet filter to ensure it's clean. * Check your fixtures for any debris or obstructions.
  • T
    Teresa SmithAug 13, 2025
    Why is there fluctuation in hot water temperature with Eternity Plus M20?
    • G
      gutierrezelizabethAug 14, 2025
      If you're experiencing temperature fluctuations with your Eternity Plus Water Heater, consider the following: * Check if the filter on the cold water inlet is clean. * Ensure the gas line is properly sized. * Confirm that the supply gas pressure is adequate. * Inspect for any cross-connections between the cold and hot water lines.
  • K
    Kelly ThomasAug 18, 2025
    What to do if Eternity Plus M20 Water Heater does not ignite when water goes through the unit?
    • V
      Veronica AllenAug 18, 2025
      If your Eternity Plus Water Heater isn't igniting when water flows through it, try these troubleshooting steps: * Ensure the flow rate is above 3.0l/min. * Check the cold water inlet filter for blockages. * Inspect for any reverse or cross-connections. * If using a remote controller, make sure it's powered on.
  • C
    Cesar HartAug 21, 2025
    Why does it take a long time to get hot water at the fixtures with Eternity Plus M20?
    • U
      uwardAug 22, 2025
      The time it takes to get hot water from your Eternity Plus Water Heater to your fixtures depends on the length of the piping between them. The longer the distance or the larger the pipes, the longer it will take for the hot water to arrive.
  • R
    richardtaylorAug 26, 2025
    What to do if Eternity Plus M20 Water Heater remote controller does not display anything when turned on?
    • J
      Jordan ArnoldAug 27, 2025
      If the remote controller for your Eternity Plus Water Heater isn't displaying anything when you turn it on, ensure that the unit has power supply and the connection to the unit is correct.

Summary

Important Notes

Installation Notes

Guidelines for installation, including national, state, and local regulations.

Service Notes

Guidelines for maintenance and fault-finding according to instructions and regulations.

Plumbing Notes

Pre-set temperatures for M20-70°C and M20-50°C models, and connection requirements.

Specifications

Introduction

Dimensions and Connection Points (M20)

Detailed dimensions and connection points for the M20 model.

Dimensions and Connection Points (M26)

Detailed dimensions and connection points for the M26 model.

Safety Guidelines

Critical safety warnings and instructions for installation and operation.

General Guidelines

General advice and precautions for appliance installation and use.

Installation

Confirm Appliance Suitability

Verify the unit's suitability for gas type, pressure, water pressure, and electrical rating.

Selecting Suitable Location for Installation

Precautions and considerations for choosing the installation location, including ventilation and clearances.

Clearances for Outdoor Heater Locations

Required minimum clearances for outdoor installations based on AS/NZS 5601.1:2010 standards.

Gas Connection

Instructions and precautions for connecting the gas supply to the water heater.

Sizing and Connection Suitability

Guidelines for gas line sizing, pressure, and connection suitability.

Measuring Inlet Gas Pressure and Testing Gas Leakage

Procedures for checking gas pressure and performing leak tests before operation.

Water Connections

Instructions for connecting water supply lines, including valve types and pressure checks.

Electrical Connection

Requirements for electrical grounding, power supply, and switch installation.

Remote Controller (Optional)

Remote Controller Installation Requirements

Guidelines for safely installing remote controllers, considering splash resistance and sealing.

Remote Controller Temperature Setting (70°C Mode)

Range and increment for setting temperature with remote controller in 70°C mode.

Remote Controller Temperature Setting (50°C Mode)

Range and increment for setting temperature with remote controller in 50°C mode.

Remote Controller Installation

Details on cable requirements, length, and wall mounting for the remote controller.

Connection of Remote Controller Wiring

Step-by-step instructions for connecting the remote controller wiring to the water heater unit.

Initial Operation

Safety Before Operating

Crucial safety checks and precautions before initial startup of the water heater.

Normal Operation

Operation Without Remote Controller

Steps for operating the water heater using manual controls.

Operation With Multiple Remote Controllers

How to operate the unit when multiple remote controllers are connected.

Freeze Prevention

Information and caution regarding freeze protection for the water heater and associated pipes.

Maintenance and Service

Unit Draining and Filter Cleaning

Step-by-step guide for draining the unit and cleaning the cold-water inlet filter.

General Troubleshooting

Common problems related to temperature, hot water, unit ignition, and fan operation.

PCB Error Codes

A table listing error codes displayed on the remote controller and their corresponding faults.

Wiring Diagram

Illustrates the electrical connections and component wiring for the water heater.

Water Flow and Water Temperature (M20)

Charts showing water flow rates vs. temperature for the M20 model at different supply water temperatures.

Water Flow and Water Temperature (M26)

Charts showing water flow rates vs. temperature for the M26 model at different supply water temperatures.

Warranty Conditions

Eternity Plus M20 Specifications

General IconGeneral
BrandEternity Plus
ModelM20
CategoryWater Heater
LanguageEnglish

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