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Midea M20 - User Manual

Midea M20
34 pages
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AUSTRALIA AND NEW ZEALAND
GAS SAFETY CERTIFICATION
®
DO NOT REMOVE
WaterMark
GMK10177
WM-022451
Installation And Operation Guide
FOR EXTERNAL INSTALLATION ONLY
MODELS:
M20
M20-50
M26
M26-50
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.

Questions and Answers

  • A
    Adam EdwardsJul 28, 2025
    Why is my Midea Water Heater water not hot enough?
    • D
      Dana ChaseJul 28, 2025
      If the water from your Midea Water Heater isn't hot enough, several factors could be the cause. Begin by comparing the flow and temperature. Also, examine the plumbing to ensure there's no cross-connection between the cold and hot water lines. Verify that the gas supply valve is fully open and that the gas line is properly sized, with adequate supply pressure. Lastly, check if the set temperature is set too low.
  • A
    Amber LucasAug 1, 2025
    What to do if hot water is not available from my Midea M20 Water Heater?
    • P
      Phillip LloydAug 1, 2025
      If you're not getting hot water from your Midea Water Heater when you open a fixture, consider these potential issues: * Ensure the unit is receiving the correct 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 to ensure it's clean. * Verify the hot water fixture is open sufficiently to draw at least 3.0l/min through the heater. * Check if the unit is frozen or if the propane bottle (for propane models) has enough LPG.
  • S
    shannon73Aug 6, 2025
    Why does the hot water from my Midea M20 get cold and stay cold?
    • W
      whughesAug 6, 2025
      If the hot water from your Midea Water Heater turns cold and stays that way, here are a few things to check: * Ensure the flow rate is sufficient to keep the water heater running. * Verify that the gas supply valve is fully open. * Check the cold water inlet filter to make sure it's clean. * Inspect the fixtures for any debris or obstructions.
  • T
    Theresa PetersonAug 10, 2025
    Why does my Midea M20 not ignite?
    • A
      Amy SmithAug 10, 2025
      If your Midea Water Heater doesn't ignite when water flows through it, try the following: * Make sure the flow rate is over 3.0l/min. * Inspect the filter on the cold water inlet. * Check for reverse or cross connections. * If using a remote controller, ensure it's powered on.
  • C
    chambersheidiAug 14, 2025
    Why is the water from my Midea M20 Water Heater too hot?
    • L
      Lisa YoungAug 14, 2025
      If the water from your Midea Water Heater is too hot, check if the set temperature is set too high.
  • M
    Mark RiceAug 18, 2025
    What to do if the Midea M20 Water Heater remote controller doesn't display anything?
    • A
      Austin BrownAug 19, 2025
      If the remote controller for your Midea Water Heater doesn't display anything when you turn it on, ensure the unit has a power supply and that the connection to the unit is correct.
  • R
    Ryan CarsonAug 22, 2025
    Why can't the Midea Water Heater remote controller change the temperature?
    • R
      reeddonaldAug 22, 2025
      If the remote controller for your Midea Water Heater can't change the set temperature, check if the power light is flashing. If it is not, locate the priority controller and turn it off, or wait for 10 minutes of inactivity.

Summary

Important Notes and Regulations

Installation Regulations Compliance

Details national, state, and local regulations for installation, including Australian Standards.

Service and Maintenance Guidelines

Instructions for maintenance and fault-finding must comply with manual and regulations.

Plumbing Specifications and Requirements

Specifies factory pre-set temperatures and requirements for temperature control devices.

Technical Specifications and Dimensions

Appliance Data and Measurements

Provides technical data and dimensions for M20/M20-50 and M26/M26-50 models.

Introduction to the Water Heater

Dimensions and Connection Points (M20;M20-50)

Detailed diagrams and measurements for M20/M20-50 unit connection points.

Dimensions and Connection Points (M26;M26-50)

Detailed diagrams and measurements for M26/M26-50 unit connection points.

Safety Guidelines for Use

Provides essential warnings and instructions for installation and operation safety.

General Operation Guidelines

Offers guidance on planning installation, checking labels, and handling problems.

Installation Procedures

Confirm Appliance Suitability

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

Select Suitable Installation Location

Guidance on choosing an appropriate location considering ventilation, drainage, and access.

Outdoor Heater Location Clearances

Specifies minimum clearances for outdoor installation based on AS/NZS 5601.1:2013 standards.

Gas Connection Instructions

Instructions for connecting the gas supply, including safety precautions and leak testing.

Gas Sizing and Connection Suitability

Guidance on selecting correct gas type, ensuring appropriate pressure, and piping size.

Measure Gas Pressure and Test for Leaks

Procedure for measuring gas pressure and performing gas leak tests before operation.

Water Connection Procedures

Details on connecting water supply lines, including valve types and pressure considerations.

Electrical Connection Requirements

Requirements for electrical grounding, power supply, and safe wiring practices.

Remote Controller Operation

Remote Controller Installation Guidelines

Procedure for physically mounting the remote control unit to the wall using screws.

Wiring Connection to Water Heater

Step-by-step guide for connecting remote controller wiring to the water heater PCB.

Initial Operation Steps

Normal Operation Modes

Operation Without Remote Controller

Steps for operating the water heater using manual controls and mixing hot/cold water.

Operation With Remote Controllers

Procedure for operating the water heater using installed remote controllers and priority functions.

Freeze Prevention Measures

Information on protecting the water heater and pipes from freezing, noting limitations.

Maintenance and Service Procedures

Unit Draining and Filter Cleaning

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

General Troubleshooting Guide

PCB Error Code Diagnostics

Wiring Diagram and Settings

Side Diverter Installation and Configuration

Water Flow and Temperature Charts (M20)

Water Flow and Temperature Charts (M26)

Warranty Conditions and Registration

Midea M20 Specifications

General IconGeneral
BrandMidea
ModelM20
CategoryWater Heater
LanguageEnglish

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