Lochinvar Noble Combi Boiler Manual: A Comprehensive Guide
This manual details the Lochinvar Noble Combi boiler (NKC 110, 150, 199) – installation, operation, maintenance, and troubleshooting for optimal performance.
Understanding the Lochinvar Noble Combi Boiler
The Lochinvar Noble Combi boiler is a high-efficiency condensing boiler designed for both heating and domestic hot water production. These units, including models NKC 110, NKC 150, and NKC 199, offer a compact design and are known for their reliable performance.
Unlike traditional boilers, combi boilers integrate both functions into a single unit, eliminating the need for a separate hot water tank. This results in space savings and increased energy efficiency. The Noble series utilizes stainless steel heat exchangers and aluminum fins for durability and optimal heat transfer. Understanding its operation requires familiarity with the control panel and its various settings, ensuring consistent comfort and cost savings.
Boiler Model Variations (NKC 110, NKC 150, NKC 199)
The Lochinvar Noble Combi series offers three primary models: NKC 110, NKC 150, and NKC 199, each differing in BTU input and output capacity. The NKC 110 is suited for smaller homes or lower heating demands, while the NKC 150 provides increased output for medium-sized residences. The NKC 199 is the most powerful, designed for larger homes or those with significant heating requirements.
Key distinctions also lie in the turndown ratio; some models feature a 5:1 ratio, while others boast a more efficient 10:1 ratio. These variations impact fuel consumption and responsiveness to heating needs. All models share core features like stainless steel heat exchangers, but specific components may vary.
Key Features and Benefits
The Lochinvar Noble Combi boiler boasts several key features enhancing performance and user experience. These include a high-efficiency design, maximizing fuel utilization and reducing energy costs. The stainless steel heat exchanger, coupled with aluminum fins, ensures durability and efficient heat transfer. An ECM pump contributes to quiet operation and optimized water flow.
Furthermore, the Noble Combi offers a substantial 15-year heat exchanger warranty and a 5-year parts warranty, providing peace of mind. Optional Wi-Fi capability enables remote control and monitoring. Its compact design facilitates installation in various spaces, and the 10:1 turndown ratio optimizes comfort and efficiency.
Installation Procedures
Proper installation is crucial for safe and efficient operation. This section covers pre-installation checks, gas, water, ventilation, and electrical connection requirements.
Pre-Installation Checklist
Before beginning the installation of your Lochinvar Noble Combi Boiler, a thorough checklist is essential for a smooth and compliant process. Verify adequate space around the unit for servicing and ventilation, adhering to local codes. Confirm the gas supply meets the boiler’s requirements, including pressure and pipe sizing.
Ensure the electrical supply is compatible – voltage and amperage – and a dedicated circuit is available. Inspect the proposed venting path for obstructions and proper slope. Confirm the water supply pressure is within the specified range and a suitable drain is nearby for condensate disposal.
Crucially, review the complete installation manual before proceeding. Proper planning prevents costly errors and ensures long-term, reliable operation of your new boiler.
Gas Connection Requirements
The Lochinvar Noble Combi Boiler requires a precise gas connection for safe and efficient operation. A qualified gas technician must perform all gas piping work, adhering to local and national codes. Verify the boiler’s gas type (natural gas or propane) matches the available supply.
Use appropriately sized gas piping to maintain adequate pressure, even at peak demand. A manual shut-off valve should be installed upstream of the boiler for servicing and emergencies. Always perform a leak test using a soap solution after making any gas connections.
Proper grounding of the gas piping is critical. Consult the installation manual for specific gas pressure requirements for your model (NKC 110, 150, or 199).
Water Connection Requirements
Proper water connections are vital for the Lochinvar Noble Combi Boiler’s functionality and longevity. A cold water supply line, meeting local plumbing codes, must be connected to the designated inlet. Install a full-port shut-off valve for easy maintenance and isolation.
A dielectric union is essential to prevent galvanic corrosion between dissimilar metals in the plumbing system. Ensure the water supply pressure falls within the boiler’s specified range – typically between 20 and 80 PSI.
Consider a water filter to protect the heat exchanger from sediment buildup. The boiler requires a properly sized and vented drain line for condensate removal, crucial for high efficiency operation.
Ventilation and Flue Installation
Correct flue installation is paramount for safe and efficient operation of the Lochinvar Noble Combi Boiler. Always adhere to local codes and the manufacturer’s specifications. The flue system must be properly sized to handle combustion gases and ensure adequate draft.
Use only approved venting materials – typically stainless steel or PVC – compatible with the boiler’s combustion process. Maintain proper clearances to combustible materials as outlined in the installation manual.
Ensure the flue terminates in a location that prevents re-entry of exhaust gases and avoids interference with fresh air intake. Proper sealing of all flue connections is critical to prevent carbon monoxide leaks.
Electrical Connections
Prior to making electrical connections, disconnect power at the main breaker to prevent electrical shock. The Lochinvar Noble Combi Boiler requires a dedicated electrical circuit with the correct voltage and amperage, as specified on the unit’s nameplate.
Use appropriately sized wiring and conduit, adhering to all local electrical codes. Proper grounding is essential for safety and to prevent equipment malfunction. Connect the wiring to the designated terminals within the boiler’s control panel.
Verify all connections are secure and that there are no exposed wires. After completing the electrical connections, restore power and test the boiler’s operation.
Operation and Control
The Lochinvar Noble utilizes a user-friendly control panel for temperature settings, hot water adjustments, and combi mode selection for efficient heating.
Understanding the Control Panel
The Lochinvar Noble Combi boiler’s control panel is designed for intuitive operation and monitoring. Typically, it features a digital display showcasing current system temperature, error codes, and operational status. Buttons allow for adjusting heating temperature, domestic hot water settings, and selecting operating modes – including combi mode for simultaneous heating and hot water.
Navigating the panel involves understanding the icons and their functions. Some models offer Wi-Fi connectivity, enabling remote control and monitoring via a smartphone app. The display will also indicate if the boiler is actively heating, in standby, or experiencing an issue. Familiarizing yourself with the control panel’s layout and functions is crucial for efficient boiler operation and troubleshooting.
Setting the Temperature
Adjusting the temperature on your Lochinvar Noble Combi boiler is straightforward via the control panel. Use the designated up and down arrow buttons to set your desired heating temperature. The display will show the target temperature, typically in Fahrenheit. For domestic hot water, a separate setting controls the water temperature delivered to your taps.
Consider your comfort levels and energy efficiency when setting temperatures. Lowering the heating temperature can save energy, while ensuring sufficient hot water temperature prevents discomfort. The boiler’s turndown ratio (5:1 or 10:1 depending on the model) allows for precise temperature control and efficient operation across a wide range of heating demands.
Hot Water Control
The Lochinvar Noble Combi boiler provides on-demand hot water, eliminating the need for a separate storage tank. Control is managed through the boiler’s interface, allowing adjustment of the domestic hot water temperature. A higher temperature setting delivers hotter water, while a lower setting conserves energy.
The boiler’s ability to quickly heat water ensures a consistent supply. Efficient operation is enhanced by condensate return, requiring incoming water to be 140°F cooler for optimal performance. The combi function seamlessly switches between heating and hot water demands, providing both from a single unit, simplifying your home comfort system.
Combi Mode Operation
The Lochinvar Noble Combi boiler excels in ‘Combi Mode,’ simultaneously providing both central heating and domestic hot water. When a hot water tap is opened, the boiler intelligently prioritizes hot water demand, temporarily reducing heating output to maintain consistent water temperature.
Upon tap closure, heating resumes automatically. This efficient system eliminates the need for a separate hot water tank, saving space and energy. The boiler’s 5:1 or 10:1 turndown ratio ensures efficient operation across varying demands. Condensate return is crucial for maximizing efficiency, requiring a 140°F cooler water temperature.
Maintenance and Troubleshooting
Regular upkeep, descaling, and error code interpretation are vital for optimal performance. Address low water pressure and implement freezing protection for longevity.
Regular Maintenance Tasks
Consistent maintenance ensures the Lochinvar Noble Combi boiler operates efficiently and reliably. Annually, a qualified technician should inspect the burner assembly, flue pathway, and gas connections for any signs of corrosion or damage.
Check the system pressure regularly, maintaining it within the manufacturer’s recommended range. Inspect and clean the air intake and exhaust vents to prevent obstructions. Periodically examine the condensate drain line for blockages, ensuring proper drainage.
Furthermore, visually inspect all piping and connections for leaks. Document all maintenance performed, including dates and any parts replaced. Following these tasks will extend the boiler’s lifespan and minimize potential issues.
Descaling Procedures
Scale buildup within the Lochinvar Noble Combi boiler reduces efficiency and can cause component failure. Descaling removes mineral deposits from the heat exchanger. A professional should perform this, utilizing a compatible descaling solution.
The process involves circulating the solution through the boiler, dissolving the scale. Follow the descaling solution manufacturer’s instructions carefully, adhering to recommended concentration levels and contact times.
After descaling, thoroughly flush the system with clean water to remove all traces of the solution. Regular water testing can help determine the frequency of descaling needed, based on water hardness. Ignoring scale buildup can void the warranty.
Error Code Interpretation
The Lochinvar Noble Combi boiler utilizes error codes to diagnose issues. These codes, displayed on the control panel, indicate specific problems requiring attention. Consult the detailed error code table within this manual for precise definitions.
Common codes relate to flame failure, low water pressure, overheating, or issues with the gas valve. Do not attempt repairs based solely on the code; a qualified technician should always diagnose and resolve the underlying problem.
Record the error code before contacting service. Resetting the boiler after addressing the issue may require a specific sequence, detailed in the troubleshooting section. Ignoring error codes can lead to further damage.
Low Water Pressure Issues
Low water pressure is a frequent concern with combi boilers, including the Lochinvar Noble. Insufficient incoming water pressure hinders both heating and hot water production, potentially triggering error codes. Check the main water supply and ensure all valves are fully open.
Sediment buildup in pipes or the boiler’s heat exchanger can also restrict flow. Descaling procedures (see section on maintenance) may be necessary. A pressure reducing valve (PRV) might be malfunctioning, requiring adjustment or replacement.
If the issue persists, consult a qualified plumber to assess the water supply and boiler system. Ignoring low pressure can cause overheating and damage.
Freezing Protection and Winterization
Protecting your Lochinvar Noble combi boiler from freezing temperatures is crucial, especially in colder climates. The boiler incorporates freeze protection, but supplemental measures are recommended. Ensure adequate insulation around exposed pipes and the boiler itself.
If prolonged periods of sub-freezing temperatures are expected, consider draining the system if the property will be unoccupied. (Consult a professional for proper draining procedures.) Maintaining a minimum room temperature above freezing is also vital.
Regularly check the condensate drain line to prevent blockages, as frozen condensate can cause operational issues. Proper winterization safeguards against costly repairs.
Technical Specifications
The Lochinvar Noble boasts varying BTU inputs, 5:1 or 10:1 turndown ratios, stainless steel heat exchangers, and an efficient ECM pump for optimal heating.
BTU Input and Output
The Lochinvar Noble Combi Boiler series offers a range of BTU input and output capabilities to suit diverse heating demands. The NKC 110 model typically features an input of 110,000 BTU/hr, while the NKC 150 steps up to 150,000 BTU/hr. For larger heating requirements, the NKC 199 provides a substantial 199,000 BTU/hr input.
Output BTU values will vary based on domestic hot water draw and heating load. These boilers are designed for efficient heat transfer, maximizing the usable BTU output. Understanding these specifications is crucial for proper sizing and ensuring the boiler effectively meets the building’s heating and hot water needs. Accurate BTU calculations are essential for optimal performance and energy savings.
Turndown Ratio (5:1, 10:1)
The Lochinvar Noble Combi Boiler boasts impressive turndown ratios, enhancing efficiency and comfort. Certain models, like the Larrs, offer a 5:1 turndown, meaning they can operate as low as 20% of their maximum firing rate. However, the NKC series features a superior 10:1 turndown ratio, allowing operation at just 10% input.
This wider range enables the boiler to precisely match heating demand, reducing energy waste during milder weather. A higher turndown ratio translates to more consistent comfort and lower operating costs. This capability is particularly beneficial in modulating systems, optimizing performance and extending boiler lifespan through reduced cycling.
Heat Exchanger Materials (Stainless Steel, Aluminum Fins)
The Lochinvar Noble Combi Boiler utilizes a high-quality heat exchanger designed for durability and efficiency. The primary construction features stainless steel, providing excellent corrosion resistance and a long operational life. To maximize heat transfer, aluminum fins are integrated with the stainless steel core.
This combination optimizes the boiler’s ability to extract heat from combustion gases, contributing to its high efficiency rating. Different models exhibit variations; some utilize solely stainless steel exchangers, while others incorporate aluminum fins for enhanced performance. Lochinvar offers a generous 15-year warranty on the heat exchanger, demonstrating confidence in its robust design and material selection.
Pump Type (ECM)
The Lochinvar Noble Combi Boiler is equipped with an ECM (Electronically Commutated Motor) circulator pump, a key component in its efficient operation. Unlike traditional pumps, ECM pumps utilize a digitally controlled motor, allowing for variable speed operation. This means the pump adjusts its flow rate based on the actual heating or cooling demand, reducing energy consumption and noise levels.
ECM pumps offer significant advantages, including improved hydraulic performance, quieter operation, and enhanced reliability. The variable speed capability also contributes to more consistent comfort levels within the home. This technology is a core feature supporting the boiler’s overall high efficiency and contributes to lower operating costs for the homeowner.
Warranty Information
Lochinvar provides a robust warranty: a 15-year heat exchanger warranty, a 5-year parts warranty, and optional Wi-Fi control coverage for peace of mind.
Heat Exchanger Warranty (15 Years)
The Lochinvar Noble Combi boiler boasts an industry-leading 15-year heat exchanger warranty, demonstrating the manufacturer’s confidence in its durability and performance. This extensive coverage protects against failures due to defects in materials or workmanship, offering significant long-term value to the homeowner.
The warranty specifically covers the stainless steel heat exchanger, a critical component responsible for efficient heat transfer. Proper installation and regular maintenance, as outlined in this manual, are essential to validate the warranty.
Registration of the boiler within a specified timeframe is typically required to activate the full 15-year warranty; otherwise, a limited warranty period may apply. Detailed terms and conditions are available through Lochinvar’s official website or by contacting their customer support.
Parts Warranty (5 Years)
Complementing the robust heat exchanger warranty, Lochinvar provides a comprehensive 5-year parts warranty for the Noble Combi boiler. This coverage extends to all mechanical and electrical components, safeguarding against defects in materials and workmanship beyond the heat exchanger itself.
The parts warranty encompasses items such as the ECM pump, control panel, gas valve, and other essential operational elements. Like the heat exchanger warranty, proper installation performed by a qualified technician and adherence to the recommended maintenance schedule are crucial for validation.
Warranty claims require proof of purchase and may necessitate the return of defective parts for inspection. Refer to the full warranty documentation for specific claim procedures and exclusions.
Wi-Fi Capability and Remote Control
The Lochinvar Noble Combi boiler offers optional Wi-Fi connectivity, enhancing user convenience and control. When equipped with the compatible module, homeowners can remotely monitor and adjust boiler settings via a smartphone or tablet application.
This remote access allows for temperature adjustments, operational status checks, and even error code viewing, providing peace of mind and potential energy savings. Users can establish customized heating schedules and receive alerts for maintenance reminders or system faults.
Installation of the Wi-Fi module is typically straightforward, and the accompanying app provides a user-friendly interface. Detailed instructions are available in the supplementary Wi-Fi connectivity guide.
Lochinvar and Bradford White Relationship
Bradford White manufactures residential water heaters for both their brand and Lochinvar, while Lochinvar produces commercial boilers for both companies.
Residential vs. Commercial Units
Lochinvar distinguishes its product lines by focusing on residential and commercial applications. Bradford White handles the residential water heater production, supplying both their own brand and Lochinvar with these units. These are typically smaller, designed for single-family homes or smaller multi-family dwellings, prioritizing ease of use and installation.
Conversely, Lochinvar directly manufactures the larger, more robust commercial boilers. These units, intended for larger buildings and complex heating systems, emphasize durability, higher BTU outputs, and advanced control features. This division of labor allows each company to specialize and optimize their offerings for their respective markets, ensuring quality and performance tailored to specific needs.
Manufacturing Partnerships
The relationship between Lochinvar and Bradford White is a strategic manufacturing partnership, not a full merger. Bradford White focuses on producing residential water heaters, supplying units under both their brand and for Lochinvar’s residential offerings. This allows Lochinvar to leverage Bradford White’s expertise in residential water heating technology and manufacturing capacity.
However, Lochinvar retains complete control over the design and manufacturing of its commercial boiler lines. This includes the larger, high-capacity units crucial for commercial and industrial applications. This arrangement allows both companies to maintain distinct identities and specialize in their core competencies, fostering innovation and market responsiveness.
Condensate Return and Efficiency
Condensate return is vital for high efficiency; cooler return water (140°F or less) maximizes heat recovery, boosting boiler performance significantly.
Importance of Condensate Return
Condensate return is absolutely crucial for achieving the high efficiency ratings promised by Lochinvar Noble Combi boilers. The process involves returning cooled water – water that has already provided heat – back to the boiler. This cooler water significantly enhances the boiler’s ability to extract latent heat from the flue gases during the condensation process.
Without proper condensate return, the boiler operates less efficiently, wasting energy and increasing operating costs. A return water temperature of 140°F or lower is generally recommended to maximize efficiency. Ensuring a consistent and adequate condensate return flow is a key component of maintaining optimal boiler performance and realizing long-term savings. Proper system design and installation are essential for effective condensate return.
Water Temperature Requirements (140°F Cooler)
Maintaining a return water temperature 140°F cooler than the supply temperature is vital for maximizing the efficiency of your Lochinvar Noble Combi boiler. This temperature differential enables the boiler to enter its condensing mode, extracting additional heat from the exhaust gases.
Lower return temperatures directly correlate with increased efficiency and reduced gas consumption. Systems lacking sufficient condensate return, or with excessively warm return water, will operate in non-condensing mode, diminishing performance. Proper system design, including appropriate pipe insulation and flow rates, is crucial. Regularly verifying return water temperatures ensures optimal boiler operation and cost savings.
High Efficiency Boiler Operation
The Lochinvar Noble Combi boiler achieves high efficiency through condensing technology, extracting latent heat from water vapor in the flue gases. This process requires a cooler return water temperature (140°F cooler) to facilitate condensation.
The boiler’s stainless steel heat exchanger and ECM pump contribute to optimal performance. Proper venting and condensate drainage are essential for efficient operation. Regular maintenance, including descaling, prevents heat transfer reduction. A 5:1 or 10:1 turndown ratio allows the boiler to modulate its output, matching heating demand and maximizing fuel savings. Consistent operation within specified parameters ensures long-term efficiency.
0 Comments