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Start Capacitors
SBS-NC, LLC Commercial HVAC & Electrical • May 4, 2023

Comprehensive Analysis of Start Capacitors in Commercial HVAC Systems

     Start capacitors play a vital role in enhancing the performance of single-phase electric motors, particularly in commercial HVAC systems. In the bustling city of Winston-Salem, NC, where businesses rely on efficient HVAC systems, understanding the importance of start capacitors is crucial. These electrical components temporarily modify the current in one or more motor windings to produce a rotating magnetic field, ensuring seamless motor operation. This essay delves into the intricacies of start capacitors, their working mechanism, and their applications and characteristics in commercial HVAC systems, with a focus on Winston-Salem, NC.


     A start capacitor is an electrical device responsible for storing and releasing electrical charge when required. It consists of two conductive plates separated by an insulating material called a dielectric. The capacitance, measured in farads (F), is determined by factors such as the plates' size and shape, the distance between the plates, and the type of dielectric material.


     Designed with high capacitance values for their size and voltage rating, start capacitors can store a significant amount of charge and release it quickly. Consequently, they are well-suited for applications demanding a brief current surge, such as initiating electric motors in commercial HVAC systems.


     In commercial HVAC systems, particularly in Winston-Salem, NC, a start capacitor is connected in series with a motor's start winding, also known as the auxiliary winding. This connection leads to a phase shift in the current flowing through the main winding (run winding) of the motor, resulting in a rotating magnetic field that induces torque on the rotor. The torque enables the motor to overcome inertia and start spinning.

The start capacitor remains in the circuit for a short period until the motor reaches a predetermined speed. A switch inside the motor, such as a centrifugal switch or a potential relay, then disconnects the capacitor from the circuit. Afterward, the motor runs more efficiently using only the run winding and a run capacitor, which offers a constant phase shift to the current flowing through the run winding and maintains a steady magnetic field.

   

     In Winston-Salem, NC, start capacitors are used in single-phase electric motors driving various components in commercial HVAC systems, such as compressors, blowers, and fans. Some air conditioner compressor units employ a dual run capacitor to boost both the fan and compressor motors.

With capacitance ratings above 70 µF, start capacitors come in four primary voltage classifications: 125 V, 165 V, 250 V, and 330 V. These capacitors are non-polarized aluminum electrolytic capacitors with a non-solid electrolyte, making them suitable for short motor starting times. They also feature an arrow indicating their polarity.


     Designed for intermittent duty, start capacitors may fail catastrophically if energized for too long, potentially overheating, exploding, or leaking electrolyte. Regular testing and replacement are necessary to avoid damage or deterioration, ensuring efficient operation of commercial HVAC systems in Winston-Salem, NC.


     Start capacitors are crucial components in the optimal functioning of single-phase electric motors in commercial HVAC systems, providing the necessary current boost to initiate the motor and generate a rotating magnetic field. With a focus on Winston-Salem, NC, these high-capacitance-value components have a brief operating time and are used with single-phase electric motors that drive various devices in commercial HVAC applications. Ensuring regular testing and timely replacement of start capacitors is essential to avoid damage or failure and maintain smooth, efficient operation of commercial HVAC systems.


     When it comes to commercial HVAC repairs in Winston-Salem, NC, SBS-NC, LLC stands as the premier choice for businesses seeking reliability, expertise, and exceptional customer service. Our team of highly skilled and certified technicians is committed to delivering unparalleled solutions tailored to your specific HVAC needs, ensuring optimal system performance and energy efficiency. At SBS-NC, LLC, we understand the importance of minimizing downtime and maintaining a comfortable environment for your employees and customers. That's why we offer prompt, responsive service and utilize cutting-edge diagnostic tools and techniques to identify and resolve issues with accuracy and precision. Choose SBS-NC, LLC for your commercial HVAC repairs in Winston-Salem, NC, and experience the difference of working with a contractor that prioritizes your satisfaction and business success. Call us today! We also serve Charlotte, Greensboro, High Point and Palm Beach, FL!


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How Long Do Chiller Systems Last? Repairs vs. Replacing for Winston-Salem Businesses

By SBS-NC, LLC Commercial HVAC • March 18, 2025
When it comes to commercial HVAC services in Winston-Salem , chiller systems play a crucial role in keeping buildings comfortable and operations running smoothly. But how long do chillers last? And when is it better to repair vs. replace? Understanding the lifespan of your chiller system can help you make cost-effective decisions and avoid unexpected downtime. How Long Do Chiller Systems Last? The average lifespan of a commercial chiller depends on factors like maintenance, usage, and environmental conditions. Air-Cooled Chillers : 15–20 years Water-Cooled Chillers : 20–30 years Absorption Chillers: 25–30 years With regular maintenance and chiller repairs , many systems can last beyond their expected life. However, as chillers age, they become less efficient, leading to higher energy costs and frequent breakdowns. Chiller Repairs vs. Chiller Replacement When to Repair a Chiller? If your chiller is still relatively new and issues are minor, repairs can extend its life and keep costs down. Signs your chiller may only need a repair include: ✅ Minor Performance Issues – If cooling output is slightly reduced but overall efficiency remains stable. ✅ Leaks or Refrigerant Issues – Small refrigerant leaks or sensor malfunctions can often be repaired cost-effectively. ✅ Inconsistent Temperature Control – If fluctuations are caused by a faulty sensor, thermostat, or minor electrical issue. ✅ Mechanical Wear & Tear – Bearings, fans, and pumps can be replaced without needing a full system replacement. Routine commercial HVAC services in Winston-Salem, including preventive maintenance and regular tune-ups, can reduce the need for major chiller repairs. When to Replace a Chiller? At some point, chiller repairs become too costly, and a full replacement is the smarter choice. Signs it’s time for a new system include: ❌ Frequent Breakdowns – If you’re constantly calling for emergency chiller repairs, replacement might be more cost-effective. ❌ Rising Energy Costs – Older chillers lose efficiency, leading to skyrocketing utility bills. New systems are far more energy-efficient. ❌ Obsolete Technology – If your chiller uses outdated refrigerants (like R-22, which is being phased out), replacement is necessary. ❌ Inconsistent Performance – If your chiller struggles to maintain temperatures, it could indicate major internal failure. Upgrading to a modern, energy-efficient chiller system can reduce commercial HVAC costs while improving reliability. How to Extend the Life of Your Chiller in Winston-Salem For businesses in Winston-Salem, regular maintenance is the key to maximizing the lifespan of your chiller system. Here’s how: 🔧 Schedule Preventative Maintenance – Regular inspections catch issues before they turn into major failures. 💧 Optimize Water Treatment – For water-cooled chillers, proper water treatment prevents corrosion and scaling. 🛠️ Upgrade Components – Instead of replacing the entire unit, upgrading motors, compressors, and controls can improve efficiency. 📊 Monitor Performance with BAS/BMS – Modern building automation systems (BAS) help track chiller efficiency in real time. By working with an experienced commercial HVAC service provider in Winston-Salem, you can ensure your chiller remains efficient and reliable for years to come. Need Chiller Repairs or Replacement in Winston-Salem? If your chiller is experiencing performance issues, SBS-NC, LLC offers expert chiller repairs and commercial HVAC services in Winston-Salem , Greensboro , High Point and the surrounding areas. Our technicians provide reliable repairs, preventive maintenance, and full system replacements to keep your building comfortable and efficient. 📞 Contact us today for a chiller system inspection and get a free consultation on repair vs. replacement options!
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Transitioning from Heating to Cooling Season: Essential Commercial HVAC Tips in Winston-Salem

By SBS-NC, LLC Commercial HVAC • March 12, 2025
As winter fades and temperatures rise in Winston-Salem , commercial buildings must transition their Commercial HVAC systems from heating mode to cooling mode. This change is essential to maintain indoor comfort, energy efficiency, and prevent unexpected AC repairs that could disrupt business operations. Why the Seasonal Transition Matters Switching from heating to cooling isn’t as simple as flipping a thermostat . Over the winter months, your Commercial HVAC system accumulates dust, experiences wear and tear, and may have developed hidden issues. Without proper maintenance, your system could struggle to keep up with the summer heat, leading to inefficiency and costly AC repairs . Steps to Prepare Your Commercial HVAC for Cooling Season To ensure a smooth transition, follow these essential steps: 1. Schedule a Professional HVAC Inspection A licensed Commercial HVAC technician in Winston-Salem can inspect your system for wear and tear, refrigerant levels, and airflow issues. Catching minor problems early can help avoid expensive AC repairs later in the season. 2. Clean or Replace Air Filters Dirty filters restrict airflow, forcing your system to work harder and increasing energy costs. Changing filters regularly improves efficiency and indoor air quality, ensuring optimal performance for your cooling system. 3. Check Thermostat Settings Adjust your thermostat from heating to cooling and ensure it’s programmed for peak efficiency. Smart thermostats can help businesses in Winston-Salem reduce energy costs by automatically adjusting temperatures based on occupancy. 4. Inspect Ductwork and Vents Leaks or blockages in ductwork can reduce cooling efficiency and lead to uneven temperature distribution. Ensuring vents are clean and unblocked helps maintain consistent airflow throughout your commercial space. 5. Test Your AC System Before peak summer temperatures hit Winston-Salem, turn on your air conditioning system to check for unusual noises, weak airflow, or inconsistent cooling. If you notice any issues, schedule AC repairs immediately to prevent a breakdown during the hottest months. 6. Schedule Preventative Maintenance Routine maintenance is key to prolonging the life of your Commercial HVAC system. An HVAC professional can perform coil cleaning, check refrigerant levels, and ensure all components are functioning properly before heavy summer usage. Benefits of a Well-Maintained Cooling System Lower Energy Bills – A properly maintained Commercial HVAC system operates more efficiently, reducing energy consumption. Fewer Emergency AC Repairs – Preventative maintenance helps avoid sudden breakdowns and costly repairs. Improved Indoor Air Quality – Clean filters and ductwork help reduce allergens and pollutants, creating a healthier environment for employees and customers. Extended Equipment Lifespan – Regular maintenance reduces strain on your system, helping it last longer and perform better. Need Commercial HVAC Service in Winston-Salem ? If your business is preparing for the cooling season, our team at SBS-NC, LLC is here to help. We provide expert AC repairs and Commercial HVAC maintenance services to keep your system running smoothly all summer long. Contact us today to schedule your seasonal tune-up!
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Finding the right Commercial HVAC contractor in Greensboro, NC

By SBS-NC, LLC Commercial HVAC • February 21, 2025
When it comes to keeping your business comfortable year-round, choosing the right commercial HVAC contractor is crucial. Whether you need AC repairs, preventative maintenance, or a full system replacement, working with a trusted and experienced HVAC provider ensures efficiency, reliability, and cost savings. At SBS-NC, LLC , we’ve been serving businesses in Greensboro, NC and across the Southeastern U.S. since 1991. Unlike many HVAC companies, we self-perform all HVAC work—no subcontractors, no delays—just expert service you can trust. Here’s how to find the right commercial HVAC partner for your business and why SBS-NC, LLC is the best choice. 1. Look for Experience and Expertise Commercial HVAC systems are complex and require a specialized skill set that differs from residential HVAC work. When selecting a contractor, consider: Years in business – SBS-NC, LLC has over 30 years of experience handling all aspects of commercial HVAC systems. Certifications and training – Our technicians are fully certified and continuously trained in the latest HVAC technologies. Industry specialization – We work with businesses of all sizes, from small offices to large corporate facilities, ensuring tailored solutions for your needs. 2. Prioritize a Contractor Who Self-Performs All Work Many HVAC companies subcontract their work, which can lead to delays, inconsistent quality, and hidden costs. At SBS-NC, LLC, we take pride in handling all HVAC projects in-house. This means: ✔ No middlemen—just direct service from trained professionals. ✔ Faster response times and seamless project management. ✔ Greater accountability for quality and customer satisfaction. 3. Ensure They Offer Comprehensive Services A good commercial HVAC contractor should be able to handle all of your business’s HVAC needs, including: Preventative maintenance to keep your system running efficiently and reduce unexpected breakdowns. AC repairs to quickly restore cooling and comfort in your building. RTU (rooftop unit) replacements for improved energy efficiency and performance. Emergency services for urgent HVAC issues that can’t wait. At SBS-NC, LLC, we specialize in all of the above, helping businesses in Greensboro, NC stay ahead of HVAC issues before they impact operations. 4. Check Customer Reviews and Reputation A company’s reputation speaks volumes. Before hiring an HVAC contractor, check online reviews and ask for customer references. We take pride in our long-standing relationships with businesses across Greensboro and beyond. Our clients appreciate our reliability, professionalism, and ability to deliver top-notch HVAC services without outsourcing the work. 5. Look for Energy-Efficient Solutions Energy-efficient HVAC solutions can significantly reduce your operating costs. A reputable contractor will offer energy-saving options such as: High-efficiency HVAC systems Smart thermostats and zoning systems Regular maintenance to optimize performance At SBS-NC, LLC, we help businesses upgrade their systems for maximum efficiency and cost savings, ensuring long-term benefits. 6. Choose a Contractor That Understands Local Needs Greensboro’s climate presents unique challenges for HVAC systems, from hot, humid summers to chilly winters. A local contractor like SBS-NC, LLC understands these regional factors and can recommend solutions tailored to your business’s needs. SBS-NC, LLC is Your Trusted Commercial HVAC Partner When searching for a commercial HVAC contractor in Greensboro, NC, don’t settle for anything less than a trusted, experienced, and self-performing team. At SBS-NC, LLC, we are committed to delivering high-quality AC repairs, preventative maintenance, and system replacements to keep your business running smoothly. If you’re looking for reliable commercial HVAC services in Greensboro , contact SBS-NC, LLC today. Our team is ready to provide expert solutions tailored to your business’s unique HVAC needs. 📞 Call us today to schedule a consultation!
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Snow and Commercial HVAC Systems

By SBS-NC, LLC Commercial HVAC • December 4, 2024
How Does Snow Affect Commercial HVAC Units? As winter sweeps through Winston-Salem, NC , business owners must consider how snow and ice impact their commercial HVAC systems . Whether you run a retail store, office space, or industrial facility, the performance of your heating and cooling systems can make or break your comfort, productivity, and energy efficiency . Snow poses unique challenges for commercial heating and HVAC systems, and addressing these issues promptly can save you from costly heating repairs . In this blog, we’ll explore how snow affects commercial HVAC units and offer practical tips to protect your investment. The Impact of Snow on Commercial HVAC Systems 1. Blocked Airflow Snow accumulation around rooftop or outdoor HVAC units can block airflow, causing the system to overheat or malfunction. Restricted airflow reduces efficiency, leading to higher energy bills and unnecessary strain on the equipment. 2. Frozen Components Ice buildup on heat pumps, coils, and condenser units can damage essential components. Frozen parts may crack, leading to costly repairs or replacements. Prolonged exposure to freezing conditions without proper maintenance could also shorten the lifespan of your commercial HVAC system. 3. Excess Moisture Melting snow introduces excess moisture into your system. If not drained properly, this moisture can lead to rust, corrosion, and electrical issues, all of which can compromise the performance of your heating equipment. 4. System Overload During colder months, commercial heating systems often work overtime to maintain a comfortable indoor temperature. Snow and ice further increase the workload, putting your HVAC unit at risk of overheating or breaking down. 5. Roof Damage For rooftop HVAC systems, the weight of heavy snow can damage structural supports, potentially misaligning or damaging your unit. This not only impacts performance but also increases repair costs. Preventing Snow-Related HVAC Problems Protecting your commercial HVAC system from snow in Winston-Salem’s unpredictable winter weather doesn’t have to be complicated. Here are some preventative measures: -Clear Snow Regularly: Ensure snow is removed from around outdoor units to prevent airflow blockage. Be cautious to avoid damaging the equipment during snow removal. -Schedule Regular Maintenance: Professional HVAC inspections before winter can help identify vulnerabilities in your system, ensuring it’s ready for colder weather. -Install a Protective Cover: Consider using a cover designed specifically for commercial HVAC systems to shield the unit from snow and ice without obstructing airflow. -Inspect Drainage Systems: Ensure proper drainage to prevent water from pooling and freezing in or around your HVAC unit. -Monitor Roof Conditions: If you have a rooftop HVAC system, inspect your roof regularly to ensure it’s structurally sound and free from excess snow buildup. When to Call for Professional Heating Repairs in Winston-Salem, NC Even with preventative measures, winter weather can sometimes lead to unexpected HVAC problems. If you notice inconsistent heating, unusual noises, or spikes in energy bills, it’s time to call a commercial HVAC professional in Winston-Salem. Prompt attention to these issues can prevent minor problems from becoming costly emergencies. Why Choose Us for Your Commercial HVAC Needs in Winston-Salem, NC? As trusted experts in commercial HVAC systems, we understand the unique challenges winter brings to Winston-Salem businesses. Our services include: - Comprehensive commercial heating maintenance - Quick and reliable heating repairs - Energy-efficient HVAC upgrades tailored to your business Don’t let snow and ice take a toll on your commercial HVAC system. Contact us today to schedule an inspection or repair and keep your business running smoothly all winter long. Contact Us Looking for dependable commercial HVAC services in Winston-Salem, NC? Call us today or schedule an appointment online. Let us help you stay warm and efficient this winter.

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