Excel Tankless Water Heater Manual⁚ A Comprehensive Guide

This manual provides comprehensive guidance on installing, operating, and maintaining your Excel tankless water heater. It covers troubleshooting, various models, maintenance schedules, and answers frequently asked questions to ensure optimal performance and longevity.

Troubleshooting Common Issues

Experiencing problems with your Excel tankless water heater? This section helps diagnose and resolve common issues. No hot water? Check water pressure; insufficient pressure (below 2 psi) prevents startup. Is the unit not igniting? Examine the batteries (for battery-operated models) or ensure proper gas supply connection. Cold water mid-shower? This often indicates either insufficient water flow or, conversely, excessive flow exceeding the heater’s capacity. A consistent flow rate is crucial. If the issue persists, review the unit’s error codes displayed on the control panel (if equipped) and consult the specific troubleshooting section in your model’s manual for detailed guidance. Remember to always turn off the gas supply and electricity before attempting any internal inspections or repairs. For complex problems, contact a qualified service technician.

Low Water Pressure Startup

A key advantage of Excel tankless water heaters is their ability to operate with exceptionally low water pressure. Unlike many traditional tankless heaters requiring a minimum of 20 psi, Excel models typically start up with as little as 2 psi. This feature makes them ideal for applications with limited water pressure, such as RVs, cabins, or areas with low water pressure infrastructure. However, while they can handle pressures up to 150 psi, consistently low pressure might affect the heater’s performance, potentially leading to reduced hot water flow or inconsistent temperature. For optimal performance, ensure your water pressure is within the recommended operating range specified in your unit’s technical specifications. If you suspect unusually low water pressure is affecting your heater, check your home’s main water supply and plumbing for any restrictions or leaks. If the problem persists, consult a plumbing professional.

Vent-Free Technology and Installation

Many Excel tankless water heaters utilize vent-free technology, eliminating the need for a traditional venting system. This simplifies installation, reducing costs and making it suitable for various locations where venting might be challenging or impossible. However, proper installation is crucial for safety. Vent-free models exhaust combustion byproducts directly into the room, requiring adequate ventilation to prevent carbon monoxide buildup. Always follow the manufacturer’s installation instructions meticulously. Ensure sufficient fresh air intake and consider installing carbon monoxide detectors near the heater. Improper installation of a vent-free unit can pose serious health risks. Consult a qualified professional if you are unsure about any aspect of the installation process, especially concerning local building codes and safety regulations. Never attempt to modify or bypass safety features.

Understanding Excel Tankless Water Heater Models

Excel offers a range of tankless water heaters, from compact RV models to higher BTU units for homes and businesses. Selecting the correct model depends on your specific hot water needs and available resources.

Excel RV Tankless Water Heater Specifications

Excel RV tankless water heaters are designed for compact spaces and low water pressure situations. Models like the EX93FR boast vent-free operation, delivering 96 gallons of hot water per hour, a significant advantage in RVs and cabins. They typically operate on low water pressure, ranging from 2 psi to 120 psi, eliminating the need for a high-pressure water supply often unavailable in recreational vehicles. These units often utilize a compact design, making them ideal for limited space, and frequently include features such as electric ignition for ease of use. Battery operation is common, typically using 2 D-cell batteries (included). Power output varies by model, but many are designed to meet the hot water needs of smaller spaces. Always consult the specific model’s specifications for exact BTU output, water pressure requirements, and other critical details before installation.

Higher BTU Excel Models for Homes and Businesses

For larger homes and businesses, Excel offers tankless water heaters with significantly higher BTU outputs. These models are designed to handle the increased hot water demands of multiple fixtures and users simultaneously. Unlike smaller RV models, these units often require a flue for venting, ensuring safe and efficient operation in larger spaces. Installation will typically necessitate professional expertise due to the increased power and potential complexity. Features may include higher flow rates (e.g., 7 GPM or more), longer heat exchanger warranties (potentially up to 15 years), and options for natural gas or propane. Specific models will vary in their BTU ratings, so careful consideration of hot water usage is essential when selecting the right unit. Always consult the detailed specifications for each model to confirm its suitability for your needs and local building codes.

Maintenance and Service

Regular maintenance ensures optimal performance and extends the lifespan of your Excel tankless water heater. This includes cleaning the heat exchanger and following a recommended service schedule.

Regular Maintenance Schedule

Establishing a regular maintenance schedule for your Excel tankless water heater is crucial for ensuring its longevity and optimal performance. Annual maintenance is highly recommended by manufacturers to prevent mineral buildup and potential operational issues. This typically involves inspecting all components for wear and tear, checking gas connections for leaks (if applicable), and verifying the proper functioning of the ignition system. A thorough cleaning of the heat exchanger is a vital part of this process, as mineral deposits can significantly reduce efficiency and even lead to premature failure. You should consult your owner’s manual for specific recommendations on cleaning procedures and the frequency of inspections. Ignoring regular maintenance can result in reduced hot water output, increased energy consumption, and ultimately, costly repairs or premature replacement of the unit. Proactive maintenance is a small investment that yields significant returns in terms of both cost savings and extended equipment lifespan.

Cleaning the Heat Exchanger

The heat exchanger is a critical component of your Excel tankless water heater, responsible for transferring heat from the burner to the water. Over time, mineral deposits from hard water can accumulate on its surfaces, reducing efficiency and potentially causing damage. Cleaning the heat exchanger is a crucial part of routine maintenance. Before attempting any cleaning, always disconnect the power supply and turn off the gas supply (if applicable) to ensure safety. Consult your owner’s manual for specific instructions on accessing the heat exchanger. Gentle brushing with a soft brush and a solution of white vinegar and water can often effectively remove mineral buildup. Avoid harsh chemicals or abrasive cleaners that could damage the heat exchanger’s delicate surfaces. Thoroughly rinse the heat exchanger with clean water after cleaning to remove any residual cleaning solution. Regular cleaning, as recommended in your owner’s manual, significantly extends the life and efficiency of your Excel tankless water heater.

Frequently Asked Questions (FAQs)

This section addresses common queries regarding installation, operation, maintenance, and troubleshooting of your Excel tankless water heater, providing clear and concise answers.

Optimal Temperature Settings

Setting the ideal temperature for your Excel tankless water heater is crucial for safety, energy efficiency, and appliance longevity. The recommended temperature range is typically between 120°F (49°C) and 125°F (52°C). Exceeding this range increases the risk of scalding, while lower temperatures might not provide sufficiently hot water for showering or dishwashing. Always consult your specific model’s manual for precise recommendations. Adjusting the temperature is usually straightforward via a control panel or digital interface. Remember, reducing the temperature can lead to significant energy savings without compromising comfort. Prioritize safety by avoiding excessively high temperatures. Regularly check and adjust the setting as needed based on your household’s preferences and usage patterns to optimize both hot water performance and energy consumption. Consider the needs of all users, especially children and the elderly, when making temperature adjustments.

Addressing Cold Water During Showers

Experiencing cold water mid-shower with your Excel tankless water heater can stem from several factors. Insufficient water flow is a common culprit; the unit might not be able to heat the water adequately if the flow rate is too low or too high. Check your water pressure; low pressure can trigger a safety shut-off. Conversely, extremely high flow rates can overwhelm the heater’s capacity. Ensure the unit is receiving sufficient gas or electrical power, depending on your model. Sediment buildup in the heat exchanger can also reduce efficiency and lead to cold water. Regularly flushing the heat exchanger is crucial for optimal performance. If the problem persists despite these checks, examine the water heater’s inlet and outlet connections for leaks or blockages. A faulty temperature sensor or other internal component may require professional servicing. Refer to the troubleshooting section of your user manual or contact customer support for further assistance. Proper maintenance and timely addressing of issues will ensure consistent hot water delivery.