Excel Tankless Water Heater Manual: A Comprehensive Guide
This manual details the Excel tankless water heater, covering installation, operation, troubleshooting, and maintenance. It highlights features like low-pressure startup and vent-free technology, ensuring efficient hot water on demand.
Understanding Excel Tankless Water Heaters
Excel tankless water heaters represent a modern approach to hot water provision, differing significantly from traditional tank-based systems. Unlike conventional heaters that continuously heat and store water, Excel units heat water only when needed, offering substantial energy savings and eliminating standby heat loss. These heaters are designed for brief, high-demand periods – think showers or dishwashing – operating for minutes before entering a standby mode.
A key advantage lies in their low-pressure startup capability, functioning effectively with as little as 20 psi, a feature uncommon in older tankless models. Furthermore, many Excel models utilize vent-free technology, simplifying installation by negating the need for costly flue systems. Understanding these core principles is crucial for optimal performance and longevity.
Key Features and Benefits
Excel tankless water heaters deliver numerous advantages over traditional systems. The low-pressure startup capability ensures reliable operation even in homes with lower water pressure, a significant benefit over competitors requiring at least 20 psi. Vent-free technology drastically reduces installation costs by eliminating the need for expensive flue systems, simplifying the process and saving homeowners money.
These units boast a high hot water output of 1.6 gallons per minute (5.5 l/min), and utilize a pure copper heat exchanger for durability and efficient heat transfer. Their compact dimensions (11.6″W x 6″D x 14.5″H) allow for flexible installation options, maximizing space utilization.
Low Pressure Startup Capability
A standout feature of the Excel tankless water heater is its ability to ignite and operate effectively with remarkably low water pressure. Unlike many conventional tankless models demanding a minimum of 20 psi, the Excel unit functions reliably even with lower incoming pressure. This is due to advanced engineering and design, making it ideal for homes or situations where water pressure is consistently below average.
This capability eliminates the need for costly pressure boosting systems, providing a significant cost saving and simplifying installation. It ensures consistent hot water delivery, regardless of fluctuating water supply conditions, offering peace of mind to homeowners.
Vent-Free Technology & Installation
The Excel tankless water heater utilizes innovative vent-free technology, significantly simplifying the installation process and reducing overall costs. Traditional tankless heaters require expensive and complex flue installations to safely vent combustion gases. However, the Excel model eliminates this requirement, making it a more accessible and affordable option for many homeowners.
This vent-free operation is achieved through advanced combustion technology and safety features. Installation is streamlined, reducing labor costs and minimizing disruption to your home. It’s crucial to adhere strictly to local codes and regulations when installing a vent-free appliance, ensuring safe and efficient operation.
Technical Specifications
The Excel tankless water heater boasts impressive technical specifications designed for optimal performance and efficiency. Key features include a hot water output of 1.6 gallons per minute (5.5 l/min), providing a consistent and reliable hot water supply. Its compact dimensions – 11.6 inches wide, 6 inches deep, and 14.5 inches high – allow for flexible installation options in various spaces.
Furthermore, the unit features a pure copper heat exchanger, ensuring durability and efficient heat transfer. Notably, the Excel model operates effectively with a low-pressure startup, requiring only minimal water pressure. These specifications combine to deliver a powerful and convenient hot water solution.
Hot Water Output & Flow Rate
The Excel tankless water heater is engineered to deliver a consistent and robust hot water supply on demand. Specifically, it provides a hot water output of 1.6 gallons per minute (GPM), which translates to 5.5 liters per minute (l/min). This flow rate is generally sufficient for single-fixture applications like showers or washing dishes simultaneously.
Unlike traditional tank water heaters, the Excel unit doesn’t store water, eliminating standby heat loss. Its on-demand operation ensures hot water is available only when needed, maximizing energy efficiency. The consistent flow rate provides a comfortable and reliable hot water experience for everyday use.
Dimensions and Physical Characteristics
The Excel tankless water heater boasts a compact design, making it suitable for various installation locations. Its dimensions are carefully considered for ease of integration into homes and small spaces. Specifically, the unit measures 11.6 inches in width, 6 inches in depth, and 14.5 inches in height.
These relatively small dimensions, combined with its lightweight construction, simplify the installation process. The heater’s physical characteristics are designed to minimize its footprint while maximizing performance. This compact size doesn’t compromise its ability to deliver consistent hot water on demand, offering a practical solution for efficient heating.
Pure Copper Heat Exchanger
At the heart of the Excel tankless water heater lies a high-quality, pure copper heat exchanger. This crucial component is responsible for efficiently transferring heat to the water, ensuring rapid and consistent heating. Copper’s exceptional thermal conductivity allows for optimal heat exchange, maximizing the unit’s energy efficiency and reducing operating costs.
The use of pure copper also contributes to the heater’s durability and longevity, resisting corrosion and scaling. This robust construction minimizes maintenance requirements and ensures reliable performance over years of use. The pure copper heat exchanger is a key factor in the Excel heater’s ability to deliver dependable hot water.
Installation Guide
Proper installation is critical for the safe and efficient operation of your Excel tankless water heater. This guide provides essential instructions for both gas and water supply connections. Ensure compliance with all local codes and regulations throughout the installation process. Prior to beginning, verify adequate gas supply pressure and water flow to meet the heater’s requirements.
The Excel unit’s vent-free design simplifies installation, eliminating the need for costly flue systems. However, proper ventilation of the surrounding area is still essential. Carefully follow the provided diagrams and instructions for secure and leak-free connections. Professional installation is recommended for those unfamiliar with plumbing and gas fitting.
Gas Supply Requirements
The Excel tankless water heater requires a properly sized gas supply line to ensure optimal performance and safety. Natural gas or propane can be used, but the system must be compatible with the chosen fuel type. A qualified technician should verify the gas supply pressure meets the heater’s specifications – typically, a minimum input pressure is required for consistent operation.
It’s crucial to use approved gas piping materials and fittings, adhering to local codes. A shut-off valve must be installed upstream of the heater for easy maintenance and emergency access. Leak testing all connections with a soap solution is mandatory after installation to prevent potential hazards.
Water Supply Requirements
Proper water supply is essential for the Excel tankless water heater’s functionality. A minimum water flow rate is needed to activate the unit; however, exceeding the maximum flow rate can reduce heating efficiency. The incoming water pressure should ideally be between 20 and 80 PSI, though the Excel unit boasts a low-pressure startup capability, functioning with as little as 20 PSI – a significant advantage over many competitors.
Install a sediment filter upstream to prevent debris from entering the heat exchanger, prolonging its lifespan. Use appropriate plumbing materials rated for hot water applications.
Operation and Usage
The Excel tankless water heater provides on-demand hot water, activating only when a hot water tap is turned on. This differs from traditional tank heaters, saving energy by eliminating standby heat loss. Expect a brief delay before hot water arrives, as the unit ignites and heats the water. These heaters are designed for short bursts of use – showers, dishwashing – typically operating for 5-10 minutes before the combustion cycle ends.
Familiarize yourself with the control panel for adjusting temperature and monitoring operation. Regular use will ensure optimal performance and longevity.
Initial Startup Procedure
Before first use, ensure both gas and water supplies are connected according to the installation guide. Slowly turn on the gas supply and check for leaks using a soapy water solution – bubbles indicate a leak. Next, open a hot water tap fully. The unit should automatically ignite when hot water is demanded. If it doesn’t, consult the troubleshooting section.
Allow the water to run for several minutes to purge any air from the lines. Monitor the water temperature and adjust as needed using the control panel. This initial flush ensures clean water and proper operation.
Adjusting Water Temperature
The Excel tankless water heater allows precise temperature control for customized comfort. Use the temperature control panel, typically featuring plus and minus buttons, to increase or decrease the desired water temperature. Start with a moderate setting and adjust incrementally until you reach your preferred warmth.
Be cautious of excessively high temperatures, which can cause scalding. A recommended maximum temperature is 120°F (49°C). Remember that incoming water temperature affects the final output; colder inlet water requires a higher setting. Regularly check and adjust as needed for optimal performance.
Troubleshooting Common Issues
Encountering problems with your Excel tankless heater? This section addresses frequent concerns. Low water pressure can hinder startup; ensure a minimum of 20 psi is available, as some models boast low-pressure startup capability. No hot water output might indicate gas supply issues, a faulty igniter, or a blocked heat exchanger.
Check the gas valve and pilot light (if applicable). If problems persist, consult a qualified technician. Remember, these units operate intermittently, turning off after brief use, unlike continuously burning stoves.
Low Water Pressure Problems
Insufficient water pressure is a common issue. Unlike many tankless heaters needing at least 20 psi to ignite, Excel models feature low-pressure startup capability. However, consistently low pressure below recommended levels will impact performance. Check your home’s water pressure using a gauge – a reading below 20 psi requires attention.
Inspect for clogged pipes or a malfunctioning pressure regulator. If the pressure is adequate at the main line but low at the heater, investigate potential blockages in the supply lines. Addressing these issues ensures optimal operation.
No Hot Water Output
Experiencing no hot water can stem from several causes. First, verify the gas supply is active and the unit isn’t in a lockout mode due to a previous error. Ensure the unit is receiving adequate water flow – a flow rate below the minimum (around 1.6 gallons per minute for this model) prevents ignition.
Check for error codes displayed on the unit, referencing the troubleshooting section for specific meanings. A faulty igniter or flame sensor could also be the culprit. If issues persist, consult a qualified technician for diagnosis and repair.
Maintenance and Care
Regular maintenance ensures optimal performance and longevity of your Excel tankless water heater. Periodic cleaning is crucial; flush the heat exchanger annually to remove mineral buildup, especially in areas with hard water. This prevents reduced flow and potential damage. Inspect the air intake and exhaust vents for obstructions, ensuring proper ventilation.
Before winter, implement winterization steps to protect the unit from freezing temperatures. This may involve draining the system if it’s exposed to prolonged cold. Professional inspection annually is recommended to identify and address potential issues proactively, maintaining efficiency and safety.
Regular Cleaning Procedures
Maintaining a clean heat exchanger is vital for efficient operation. Annually, flush the system with white vinegar to dissolve mineral deposits. Begin by shutting off the gas and water supply. Connect a pump to the cold water inlet and circulate the vinegar solution for approximately 30-60 minutes.
Subsequently, flush with clean water until the solution is completely removed. Inspect the burner assembly for debris and clean as needed. Regularly check and clean the air intake filter to ensure proper combustion. These procedures prevent reduced flow, maintain optimal heating, and prolong the lifespan of your Excel tankless unit.
Winterization Steps
Protecting your Excel tankless water heater from freezing temperatures is crucial. If the unit is in an unheated area, drain all water from the system. Shut off the gas supply and disconnect the water inlet and outlet pipes. Open the drain valve on the heat exchanger and allow all water to evacuate.
Additionally, consider using an RV antifreeze solution, carefully following manufacturer’s instructions, to further protect the internal components. Ensure proper ventilation during this process. Reconnect and restart the system when temperatures consistently remain above freezing, verifying no leaks exist.
Understanding Implicit Intersection Operator (Related to Excel Software)
Excel’s Implicit Intersection Operator, denoted by a space, functions similarly to how table references operate. It allows for combining ranges without explicitly using the intersection function. For example, if you have ranges A1:A10 and B1:B10, A1:A10 B1:B10 will return the intersection, B1:B10.
This upgrade to Excel’s formula language streamlines complex calculations. While seemingly subtle, it offers a more concise way to define overlapping areas within formulas, enhancing efficiency and readability for advanced users performing data analysis.
Dynamic Arrays and Formula Upgrades (Related to Excel Software)
Excel’s introduction of Dynamic Arrays represents a significant leap in formula capabilities. Unlike traditional formulas that return a single value, dynamic arrays spill results into neighboring cells automatically. This functionality is coupled with substantial upgrades to the formula language itself, including operators like the Implicit Intersection Operator.
These advancements simplify complex calculations and reduce the need for array formulas entered with Ctrl+Shift+Enter. Dynamic arrays and formula upgrades work together to provide a more intuitive and powerful data analysis experience within Excel, enhancing productivity.
Conditional Formatting (Related to Excel Software)
Excel’s Conditional Formatting feature allows users to visually highlight data based on specific criteria. While pre-defined styles like “Bad Style” (dark red text, light red fill) are readily available, customization is often required. Users may encounter challenges when attempting to replicate these pre-defined styles within custom conditional formatting formulas.
Despite the lack of a direct option to select pre-defined colors, achieving the desired visual effect is possible through manual color specification. This enables users to create tailored alerts and visualizations, enhancing data interpretation and identifying key trends within their spreadsheets effectively.
Regression Analysis in Excel (Related to Excel Software)
Excel’s regression analysis tools enable users to model the relationship between variables. When performing regression, Excel can simultaneously calculate using multiple independent variables (like x1 and x2). However, accessing all regression values isn’t immediately intuitive; the interface doesn’t readily display all calculated statistics.
To view comprehensive regression results, users must select the cell containing the formula and extend the selection to include at least two cells to the left; This reveals additional regression values, providing a more complete understanding of the data’s underlying relationships and predictive capabilities.
Safety Precautions
Prioritize safety when installing and operating your Excel tankless water heater. Regularly check for gas leaks using a suitable detection method; a gas smell warrants immediate attention and ventilation. Be acutely aware of the risks associated with carbon monoxide (CO) poisoning, as incomplete combustion can produce this odorless, colorless gas.
Ensure proper ventilation, even with vent-free models, and consider installing CO detectors for added protection. Unlike stoves with longer burn times, tankless heaters operate briefly, but safety remains paramount. Adhering to these precautions safeguards your home and family.
Gas Leak Detection
Prompt gas leak detection is crucial for safe operation. If you suspect a leak – indicated by a gas odor – immediately shut off the gas supply at the source. Do not operate any electrical switches or devices, as sparks can ignite the gas.
Ventilate the area thoroughly by opening windows and doors. Utilize a commercially available gas leak detector for confirmation; these devices provide an added layer of security. Contact your gas company or a qualified technician to inspect and repair the leak before resuming operation. Ignoring a gas leak poses a severe safety hazard.
Carbon Monoxide Awareness
Carbon monoxide (CO) is a colorless, odorless, and deadly gas. Proper ventilation is paramount when using any fuel-burning appliance, including your Excel tankless water heater. Install CO detectors on every level of your home, especially near sleeping areas, and test them regularly.
Recognize the symptoms of CO poisoning: headache, dizziness, weakness, nausea, vomiting, chest pain, and confusion. If a CO detector alarms, evacuate everyone from the premises immediately and call emergency services. Never ignore a CO alarm, as prolonged exposure can be fatal. Ensure proper installation and maintenance to minimize risk.
Warranty Information
Excel tankless water heaters are backed by a comprehensive warranty, providing peace of mind to our customers. The heat exchanger is warranted for a period of 15 years against defects in materials and workmanship. All other components are covered by a 5-year limited warranty.
This warranty covers parts and labor for repairs performed by authorized service personnel. Warranty coverage is voided by improper installation, misuse, or lack of regular maintenance. Proof of purchase is required to validate any warranty claim. Contact Excel customer support for detailed warranty terms and claim procedures.
Frequently Asked Questions (FAQ)
Q: What is the minimum gas pressure required for the Excel tankless heater? A: Unlike many competitors, the Excel unit boasts a low-pressure startup capability, functioning effectively with as little as 20 psi. Q: Does this heater require venting? A: Yes, the Excel utilizes vent-free technology, eliminating the need for costly flue installations.
Q: What is the hot water output? A: It delivers 1.6 gallons per minute (5.5 l/min). Q: How often should I clean the unit? Regular cleaning is recommended to maintain optimal performance. Refer to the ‘Maintenance and Care’ section for detailed procedures.