DMSIDN Mini Tankless Water Heater (Model MHC22)

Introduction

This manual provides detailed instructions for the safe and efficient installation, operation, and maintenance of your DMSIDN Mini Tankless Water Heater. Please read this manual thoroughly before using the appliance and retain it for future reference.

Image: The DMSIDN Mini Tankless Water Heater, a compact black unit with a digital temperature display.

Important Safety Information

Failure to follow these safety instructions could result in electric shock, fire, property damage, or personal injury. Always adhere to local codes and regulations.

• Vertical Installation Only: This product is designed for vertical installation. Horizontal installation may lead to dry burning and is not permitted.
• Initial Use: Ensure water is added to the unit before connecting to the power supply during the first use.
• Electrical Requirements: Recommended to be connected with wires having a cross-sectional area of ≥ 2.5 square millimeters (0.0038 in²). Connect to trip switches of over 32A.
• Protection Features: The unit includes leakage protection, dry-heating protection, anti-electric wall technology, water-electricity isolation, sensor fault protection, grounding protection, and an IPX4 waterproof rating for safe operation.
• Water Pressure: Operates within a water pressure range of 0.04-1.2 MPa.
• Temperature Range: The temperature can be regulated between 20-50°C (68-122°F).

Image: Diagram illustrating various safety features including automatic standby, grounding, dry burning protection, leakage protection, overheating protection, triangular socket, IPX4 level, and temperature range.

Product Features

• Instant Hot Water: Provides instant hot water with 3000W power and fast heat conduction heating tubes.
• Compact Design: Miniature body (4.57"W x 2.8"D x 7.68"H) for installation in small spaces, including under sinks.
• Digital Display: Electronic screen clearly displays the current water outlet temperature.
• Durable Construction: Made from stainless steel, high-quality ABS materials, and brass connectors for strength, wear resistance, and corrosion resistance.
• Advanced Flow Sensing: Incorporates advanced water flow sensing technology to operate effectively even with low water pressure.
• Easy Operation: Temperature is controlled by adjusting water flow (higher flow for lower temperature, lower flow for higher temperature).

Technical Specifications

Note: Specifications are subject to change without prior notice for product improvement.

Image: A visual representation of the water heater's dimensions and key specifications like power, voltage, frequency, water pressure, and temperature range.

Installation Guide

This section provides step-by-step instructions for installing your tankless water heater. Ensure all safety precautions are followed.

Tools and Materials Required (Not Included):

• Marker
• Electric Drill
• Hammer
• Screwdriver
• Adjustable Wrench
• Plumbing Tape (Teflon tape)

Installation Steps:

1. Mark Mounting Points: Hold the water heater against the desired vertical installation surface. Use a marker to mark the points for drilling. Ensure the location allows for proper water and electrical connections.
2. Drill Holes: Use an electric drill to create holes at the marked points.
3. Insert Expansion Screws: Gently tap the expansion screws into the drilled holes using a hammer until they are flush with the wall surface.
4. Mount Water Heater: Align the water heater with the expansion screws and secure it firmly to the wall using a screwdriver.
5. Connect Cold Water Inlet: Connect the cold water supply pipe to the water inlet port at the bottom of the heater. Ensure a tight, leak-free connection, using plumbing tape if necessary.
6. Connect Hot Water Outlet: Connect the hot water pipe from your faucet to the water outlet port at the top of the heater. Ensure a tight, leak-free connection.
7. Open Water Flow Valve: Before connecting power, open the water flow valve to allow water to fill the heater. This prevents dry burning.
8. Connect Power Supply: Once the unit is filled with water, plug the power cord into a suitable electrical outlet.

Important: Ensure the unit is completely filled with water before plugging it into the power outlet to prevent damage from dry heating.

Image: The water heater installed vertically under a kitchen sink, demonstrating its compact size and suitable placement.

Operating Instructions

1. Turn On Water Flow: Open the hot water faucet to initiate water flow through the heater. The unit will automatically detect water flow and begin heating.
2. Activate Heater: Once water is flowing, long-press the power button on the unit's digital display. The display will show the current water temperature.
3. Adjust Temperature: The water temperature is primarily controlled by the water flow rate.
   • Higher Water Flow: Results in a lower water temperature.
   • Lower Water Flow: Results in a higher water temperature.

   The digital display will show the real-time temperature. You can switch the temperature reading between Celsius and Fahrenheit by long-pressing the power button again.

   

   Image: Two digital displays showing temperature readings, one in Celsius (35) and one in Fahrenheit (95), with an arrow indicating switching between them.

4. Standby Mode: When the water flow is turned off, the unit will automatically enter standby mode, indicated by a circling blue line on the display.

Maintenance

Regular maintenance ensures optimal performance and longevity of your water heater.

• Filter Element Check: If the water flow decreases, check if the filter element is blocked. Clean or replace the filter as needed to maintain proper water flow and heating efficiency.
• Exterior Cleaning: Clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Periodic Inspection: Periodically inspect all water connections for leaks and electrical connections for any signs of wear or damage. Address any issues promptly.

Troubleshooting

This section addresses common issues you might encounter with your water heater.

Warranty and Support

For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official DMSIDN website. Keep your purchase receipt as proof of purchase.