HTW Koi Duo Electric Water Heater User Manual (80 Liters)

1. Introduction

Thank you for choosing the HTW Koi Duo Electric Water Heater. This manual provides essential information for the safe installation, operation, and maintenance of your new appliance. Please read it thoroughly before installation and keep it for future reference.

The HTW Koi Duo is a versatile electric water heater available in 50, 80, and 100-liter capacities. Its compact design and multiposition installation capability (vertical or horizontal) allow it to fit into various spaces. Key features include a dual-tank system for faster hot water delivery and energy savings, a B energy efficiency rating, shielded resistance, high-density polyurethane insulation, and protection against dry overheating. It also features two electronic anodes for tank protection, WiFi connectivity via a dedicated app, a digital touch display, and a "Smart Mode" that learns your consumption habits for optimized performance.

Image 1.1: HTW Koi Duo Electric Water Heater seamlessly integrated into a modern kitchen environment.

Image 1.2: Visual representation of the HTW Koi Duo's main features, including WiFi, dual tank, and smart functions.

2. Safety Information

WARNING: Failure to follow these safety instructions could result in electric shock, fire, property damage, or personal injury.

• Installation and maintenance must be performed by qualified personnel only, in accordance with local regulations and this manual.
• Ensure the power supply matches the specifications on the product label.
• Do not operate the water heater if it is damaged or malfunctioning. Disconnect power immediately.
• Do not block or cover ventilation openings.
• Keep flammable materials away from the water heater.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
• A safety valve and electrolytic sleeves are critical components for safe operation and must be installed. Ensure these are included and correctly fitted during installation.

3. Setup and Installation

Proper installation is crucial for the performance and safety of your water heater. It is highly recommended that installation be carried out by a certified professional.

3.1 Unpacking and Inspection

• Carefully remove the water heater from its packaging.
• Inspect the unit for any signs of damage during transit. Do not install a damaged unit.
• Verify that all accessories are present, including the safety valve and electrolytic sleeves. If any parts are missing, contact your supplier before proceeding.

3.2 Choosing an Installation Location

• The HTW Koi Duo is designed for multiposition installation (vertical or horizontal).
• Select a location that is structurally sound to support the weight of the water heater when full.
• Ensure adequate clearance around the unit for maintenance and ventilation.
• The location should be protected from freezing temperatures.
• Keep the unit away from direct sunlight or heat sources.

Image 3.1: Dimensions of the HTW Koi Duo water heater (Height: 1009 mm, Width: 556 mm, Depth: 300 mm).

3.3 Water Connection

1. Connect the cold water inlet (blue ring) to the main cold water supply.
2. Connect the hot water outlet (red ring) to your household hot water distribution system.
3. Install the provided safety valve on the cold water inlet. This is essential for pressure relief.
4. Install electrolytic sleeves as per local plumbing codes to prevent corrosion.
5. Open a hot water tap in your home to allow air to escape while the tank fills.
6. Once water flows steadily from the hot water tap, close the tap. The tank is now full.
7. Check all connections for leaks.

3.4 Electrical Connection

1. Ensure the power supply is disconnected at the main breaker before making any electrical connections.
2. Connect the water heater to a dedicated electrical circuit with appropriate overcurrent protection.
3. Ensure proper grounding according to local electrical codes.
4. Once water connections are secure and the tank is full, restore power to the unit.

4. Operation

The HTW Koi Duo features a digital touch display for easy control and WiFi connectivity for remote management.

4.1 Initial Power-On

• After electrical connection, the digital display will illuminate.
• The water heater will begin heating water to the default temperature setting.

4.2 Digital Touch Display

Use the touch controls on the display to:

• Adjust the desired water temperature.
• Select operating modes (e.g., Smart Mode, Manual Mode).
• View current water temperature and status indicators.

4.3 WiFi Connectivity and App Control

1. Download the HTW control app from your smartphone's app store.
2. Follow the in-app instructions to connect your water heater to your home WiFi network.
3. Once connected, you can remotely control temperature settings, switch modes, and monitor energy consumption from your smartphone.

4.4 Smart Mode

The "Smart Mode" feature analyzes and memorizes your hot water consumption habits. It automatically adjusts heating cycles to provide hot water when needed, optimizing energy efficiency and reducing electricity costs. To activate Smart Mode, select it from the digital display or the mobile app.

5. Maintenance

Regular maintenance ensures the longevity and efficient operation of your HTW Koi Duo water heater.

5.1 Electronic Anode

The HTW Koi Duo is equipped with two electronic anodes for internal tank protection. These anodes are designed for low maintenance and generally do not require periodic replacement like traditional sacrificial anodes.

5.2 General Cleaning

• Before cleaning, disconnect the power supply to the water heater.
• Wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Ensure the display panel is clean and free of dust for optimal touch response.

5.3 Safety Valve Check

Periodically check the safety valve (pressure relief valve) to ensure it is not blocked and functions correctly. Refer to the safety valve manufacturer's instructions for specific testing procedures. Caution: Hot water may be discharged during this test.

5.4 Draining the Tank (If Required)

If the water heater needs to be drained for extended periods of inactivity (e.g., vacation) or for servicing, follow these steps:

1. Disconnect the power supply to the unit.
2. Close the cold water inlet valve to the water heater.
3. Open a hot water tap in your home to relieve pressure and allow air into the tank.
4. Connect a hose to the drain valve at the bottom of the water heater and direct it to a suitable drain.
5. Open the drain valve and allow the tank to empty completely.
6. Once drained, close the drain valve and the hot water tap.
7. To refill, follow the steps in Section 3.3 Water Connection.

6. Troubleshooting

This section provides solutions to common issues you might encounter. For problems not listed here or if solutions do not resolve the issue, contact qualified service personnel.

7. Specifications

Technical specifications for the HTW Koi Duo Electric Water Heater (80 Liters).

Image 7.1: Energy Efficiency Class B for the HTW Koi Duo.

8. Warranty Information

Your HTW Koi Duo Electric Water Heater is covered by a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms, conditions, and duration. Keep your proof of purchase for warranty claims.

The warranty typically covers manufacturing defects under normal use. Damage resulting from improper installation, misuse, neglect, or unauthorized repairs may not be covered.

9. Customer Support

For technical assistance, spare parts, or warranty claims, please contact your retailer or the manufacturer's customer service department. When contacting support, please have your product model number (Koi Duo) and serial number ready.

Manufacturer: HTW

Distributor: Gresinex

For the latest support information, visit the official HTW website or the Gresinex store page on Amazon: Gresinex Amazon Store