1. Introduction
Thank you for choosing the HTW HTWTV100ESS Vertical Electric Water Heater. This manual provides essential information for the safe installation, operation, and maintenance of your appliance. Please read these instructions carefully before use and retain them for future reference.
2. Important Safety Instructions
WARNING: Failure to follow these safety instructions could result in electric shock, fire, property damage, or personal injury.
- Ensure the water heater is installed by a qualified professional in accordance with local regulations and codes.
- Always disconnect power to the unit before performing any maintenance or service.
- Do not operate the water heater if it is damaged or malfunctioning.
- The pressure relief valve must be installed and regularly checked to ensure proper operation. Do not block or tamper with this valve.
- Keep flammable materials away from the water heater.
- Do not allow children to operate or play near the water heater.
- Ensure proper grounding of the electrical supply.
- This appliance is designed for indoor installation only.
3. Product Overview and Features
The HTW HTWTV100ESS is a vertical electric water heater designed for efficient hot water supply. Key features include:
- Capacity: 100 Liters
- Power Output: 1.5 Kilowatts
- Pressure Relief Valve: Essential safety component to prevent overpressure.
- Incoloy 840 Heating Element: Provides durability and efficient heating.
- Anti-corrosion Magnesium Anode: Extends the lifespan of the tank and heating element, especially in hard water areas.
- Sapphire Enamel Steel Tank: Ensures robust and long-lasting performance.
- External Thermometer: Displays the current water temperature inside the tank.
- Adjustable Temperature: Allows users to set the desired water temperature precisely.
- Electrolytic Sleeves: Act as insulators to prevent galvanic corrosion between dissimilar materials in the installation, thereby enhancing durability.
- Vertical Installation: Designed specifically for vertical mounting.

Figure 3.1: Front view of the HTW HTWTV100ESS Vertical Electric Water Heater, showing the external thermometer and water inlet/outlet connections.

Figure 3.2: Diagram illustrating key features such as multiple protections, anti-corrosion anode, electrolytic sleeves, external thermometer, adjustable temperature, Incoloy 840 resistance, high-density polyurethane insulation, sapphire enamel tank, safety valve, and overheat protection.

Figure 3.3: Detailed text descriptions of features including vertical installation, Incoloy 840 resistance, anti-corrosion magnesium anode, sapphire enamel steel tank, electrolytic sleeves, safety valve, external thermometer, and adjustable temperature.
4. Setup and Installation
Installation of the HTWTV100ESS water heater should only be performed by a certified technician to ensure safety and compliance with local regulations.
4.1. Mounting
- This model is designed for vertical installation. Ensure the mounting surface is strong enough to support the full weight of the water heater when filled with water (approx. 100 kg + unit weight).
- Use appropriate mounting hardware (not included) suitable for your wall type.
4.2. Plumbing Connections
- Connect the cold water inlet (blue marking) and hot water outlet (red marking) to your plumbing system.
- Install the supplied pressure relief valve on the cold water inlet line. Ensure it is properly oriented and connected to a discharge pipe leading to an open drain. Do not install any shut-off valve between the water heater and the pressure relief valve.
- Utilize the provided electrolytic sleeves during connection to prevent galvanic corrosion between dissimilar metals in the plumbing system, thereby extending the life of the unit.
- After connecting, slowly fill the tank with water and check for leaks before connecting to power. Open a hot water faucet to allow air to escape during filling.
4.3. Electrical Connection
- Connect the water heater to a dedicated electrical circuit with appropriate voltage (220-240V, 50/60Hz) and overcurrent protection (1500W, 6.5A).
- Ensure proper grounding as per local electrical codes.
- The electrical connection should be made by a qualified electrician.
5. Operating Instructions
5.1. Initial Startup
- Ensure the tank is completely filled with water before turning on the power.
- Switch on the electrical supply to the water heater. The indicator light (if present) will illuminate.
5.2. Temperature Adjustment
- The water heater features an adjustable temperature control. Locate the thermostat knob, usually at the bottom or side of the unit.
- Turn the knob to set your desired water temperature. Higher settings will provide hotter water but consume more energy.
- The external thermometer will display the current water temperature inside the tank. Allow time for the water to heat up to the set temperature.
5.3. Normal Operation
- Once the desired temperature is reached, the heating element will cycle on and off automatically to maintain the set temperature.
- Hot water will be available at your faucets.
6. Maintenance
Regular maintenance ensures the longevity and efficient operation of your water heater. Always disconnect power before performing any maintenance.
6.1. Pressure Relief Valve Check
- Test the pressure relief valve at least once a year by lifting the lever. Water should flow out of the discharge pipe. If no water flows, or if it continues to drip after the lever is released, the valve may need replacement.
6.2. Magnesium Anode Inspection/Replacement
- The anti-corrosion magnesium anode protects the tank from corrosion. Its lifespan depends on water quality. It is recommended to have a qualified technician inspect and replace the anode every 1-3 years, especially in areas with hard water.
6.3. Draining the Tank
- If the water heater will be out of use for an extended period or if there is a risk of freezing, drain the tank.
- To drain: Disconnect power, close the cold water inlet valve, open a hot water faucet, and open the drain valve at the bottom of the water heater.
6.4. Cleaning
- Clean the exterior of the water heater with a soft, damp cloth. Do not use abrasive cleaners or solvents.
7. Troubleshooting
Before contacting customer service, please refer to the following troubleshooting guide:
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water or insufficient hot water. |
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| Water leaking from the unit. |
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| Unusual noises from the tank. |
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8. Technical Specifications
| Feature | Specification |
|---|---|
| Brand | HTW |
| Model | HTWTV100ESS |
| Capacity | 100 Liters |
| Heat Output | 1.5 Kilowatts |
| Power Source | Electric Cable (220-240V, 50/60Hz) |
| Special Feature | Pressure Relief Valve |
| Material | Alloy Steel (Sapphire Enamel Tank) |
| Installation Style | Vertical Installation |
| ASIN | B0719SXWHN |

Figure 8.1: Detailed technical specifications table for various HTW water heater models, including the 100-liter version, showing power, current, capacity, working pressure, temperature range, recovery time, insulation thickness, material, protection degree, and dimensions.
9. Warranty and Support
The HTW HTWTV100ESS water heater comes with a 5-year warranty on the tank, reflecting our commitment to quality. For warranty claims or technical support, please contact your retailer or the HTW customer service department.
Please have your model number (HTWTV100ESS) and purchase date available when contacting support.
For further assistance, visit the official HTW website or consult your local distributor.







