Ruud 14.3 SEER 2 Straight Cool Split System

Installing a Ruud 14.3 SEER 2 Straight Cool Split System, or any split HVAC system for that matter, requires careful planning, knowledge of HVAC principles, and the right tools. While I strongly recommend hiring a licensed HVAC technician to ensure correct installation and safe operation, here is an overview of the process to give you an idea of what's involved:

  1. Safety First:

    • Turn off all electrical power to the existing HVAC system.
    • Ensure you have safety gear such as gloves and safety glasses.
  2. Site Selection:

    • Choose a location for the outdoor unit (condenser) that is free from obstructions and allows for good airflow. Ensure it's on a level surface.
    • The indoor unit (air handler) should be installed in a location that allows for easy access, proper drainage, and minimized heat gain or loss.


  1. Install the Condenser:

If you're specifically focused on installing the condenser unit of a Ruud 14.3 SEER 2 Straight Cool Split System, here's a step-by-step guide to give you an idea of the process. Please note, this is a generalized overview, and the specific model you have might have unique requirements.

  1. Safety First:

    • Ensure the power is off.
    • Wear safety gear such as gloves, safety glasses, and protective footwear.
  2. Site Selection:

    • Choose a clear, level location that's away from windows and bedrooms to minimize noise disturbances.
    • There should be at least 12-18 inches of clearance on all sides for proper airflow and easy servicing.
    • Make sure it's close enough to the air handler location to minimize the length of the refrigerant lines.
  3. Place the Condenser:

    • Use a pre-cast concrete slab, rubber mounts, or another approved type of base to ensure stability and reduce vibration noise.
    • Set the condenser unit on the pad. Make sure it's level for optimal operation.
  4. Refrigerant Lines:

    • Before making any connections, prepare the copper tubing (refrigerant lines) by cutting and flaring them (if not pre-flared).
    • Connect the refrigerant lines to the condenser, ensuring tight connections. Be careful not to over-tighten and damage the threads or seals.
    • Avoid sharp bends in the copper tubing which can restrict the refrigerant flow.
  5. Electrical Connections:

    • The condenser will require a 220/240V connection, which usually means a dedicated circuit from the main panel. This should be done by a licensed electrician.
    • Install a disconnect box near the condenser. This provides a way to cut off power to the unit for maintenance without going to the main panel.
    • Route the wiring from the disconnect box to the condenser, following the wiring diagram provided in the Ruud manual.
  6. Connect to the Air Handler:

    • The other end of the refrigerant lines will connect to the evaporator coil inside the air handler or furnace.
    • Keep these lines sealed until ready to connect to prevent contaminants or moisture from getting inside.
  7. Vacuum and Charge:

    • Once all connections are made, it's crucial to vacuum down the system using a vacuum pump. This process removes moisture and air from the lines, which can affect performance and longevity.
    • After achieving an appropriate vacuum level (typically below 500 microns), you can open the refrigerant valves on the condenser. If additional refrigerant is required, this is the time to charge the system.
  8. Startup & Testing:

    • With everything connected, you can turn on the power and initiate the system.
    • Check for any refrigerant leaks at all connections.
    • Monitor the system's performance, ensuring the condenser fan is operating and that the unit is not making unusual noises.

Remember, any work with refrigerants should be done following the Environmental Protection Agency (EPA) guidelines, and typically by someone with EPA certification.

  1. Install the Air Handler:

The air handler houses the evaporator coil and the blower motor, distributing conditioned air throughout the home via the ductwork. Installing the air handler correctly is crucial for the efficient and safe operation of the system.

Here is a generalized guide to installing a Ruud 14.3 SEER 2 Straight Cool Split System Air Handler:

  1. Safety First:

    • Ensure the power to any connected or nearby circuits is off.
    • Wear appropriate safety gear, including gloves and eye protection.
  2. Selecting the Installation Location:

    • Choose a location that allows for easy access for maintenance.
    • Ensure there's adequate space around the air handler for proper airflow.
    • Common locations include basements, utility closets, attics, or garages.
  3. Preparation:

    • Position the drain pan if you're installing the air handler in an attic or above a finished space. This will catch condensate overflows.
    • If the air handler has feet or a base, install or assemble them as per the manufacturer's instructions.
  4. Positioning the Air Handler:

    • Place the air handler on a level platform or suspended from joists, depending on your chosen location and the design of the unit.
    • Ensure it's level for proper drainage of condensation.
  5. Connecting to Ductwork:

    • Attach the supply and return ducts to the air handler. Seal all connections with HVAC tape or mastic to prevent air leaks.
  6. Refrigerant Lines:

    • Route the refrigerant lines from the condenser to the air handler. Connect them to the evaporator coil, ensuring a tight connection. Be cautious not to overtighten.
    • Insulate the suction line (larger diameter line) to maximize efficiency.
  7. Condensate Drainage:

    • Connect the condensate drain pipe to the drain pan or the evaporator coil's drain connection. Ensure a slight slope toward the discharge end for proper drainage.
    • Route the drain line to an appropriate drainage point or a condensate pump if required.
  8. Electrical Connections:

    • Connect the electrical wiring for the blower motor and control panel as per the manufacturer's instructions and wiring diagrams. This typically involves a connection from the thermostat and a power source.
    • Ensure proper grounding of the air handler.
  9. Filters:

    • Install or check the air filter for the air handler. Ensure it's appropriately sized and seated correctly.
  10. Final Checks and Testing:

    • Double-check all connections and ensure all panels are secured.
    • Turn on the power and run the system.
    • Listen for any unusual noises and ensure the blower motor operates smoothly.
    • Check for proper airflow at the supply registers.
  11. Documentation:

    • Keep any manuals, warranties, and installation guides in an accessible location. Note down any maintenance schedules or specific requirements.


  1. Refrigerant Lines:

The refrigerant lines (or line set) are crucial components in a split system, carrying refrigerant between the outdoor condensing unit and the indoor evaporator coil. Proper installation is critical to ensure the efficient and safe operation of the system.

Here's a generalized guide to installing the refrigerant lines for a Ruud 14.3 SEER 2 Straight Cool Split System:

  1. Safety First:

    • Always ensure power to both the condensing unit and the air handler is turned off.
    • Wear safety gloves and goggles.
  2. Line Set Selection:

    • The line set consists of two copper tubes: a larger-diameter suction line and a smaller-diameter liquid line.
    • Ensure the line set matches the specifications of your Ruud system (length, diameter, etc.)
  3. Routing the Line Set:

    • Determine the most direct and efficient path from the outdoor unit to the indoor unit.
    • Avoid sharp bends, which can restrict refrigerant flow. Use bending tools to create smooth curves if necessary.
  4. Preparation:

    • If the lines aren't pre-flared, you will need to cut and flare the ends using a flaring tool.
    • Always place caps on open ends during installation to prevent moisture and contaminants from entering the lines.
  5. Installation:

    • Attach the line set to the air handler's evaporator coil first. Tighten connections with two wrenches to prevent over-torquing and damage.
    • Route the line set towards the outdoor unit. Secure it using line set clamps or straps at regular intervals.
    • Pass the line set through a wall if necessary, using a hole saw. Protect the lines from sharp edges using grommets or insulation.
    • Connect the line set to the condensing unit outside, following the same tightening precautions.
  6. Insulation:

    • The suction line (larger diameter) should be fully insulated to prevent condensation and increase efficiency.
    • Use quality pipe insulation, ensuring it's snug against the copper and secured with zip ties or tape.
  7. Pressure Test and Vacuum:

    • Before releasing refrigerant, pressure test the system using nitrogen to ensure there are no leaks. This test should be performed at a higher pressure than the system's typical operating pressure.
    • Once you're confident there are no leaks, use a vacuum pump to evacuate the lines and the indoor coil. This process removes moisture and air from the system. Typically, the vacuum should pull down to around 500 microns to ensure moisture is adequately removed.
  8. Open Valves and Charge:

    • If your system is pre-charged, opening the service valves on the outdoor unit will release the refrigerant into the system.
    • If not, you'll need to charge the system with the appropriate refrigerant type and amount, following manufacturer specifications.
  9. Final Checks:

    • Check all connections for leaks using a refrigerant leak detector.
    • Use line set covers or paint the insulation if desired to protect and improve the aesthetics of the installation.

Remember, refrigerant handling requires EPA certification in the U.S., and many other countries have similar regulations. If you're not certified, you should have a licensed HVAC technician complete any tasks involving refrigerant. Always refer to the specific Ruud installation guide for details pertinent to your model.

  1. Electrical Connections:

Connecting the electrical components of a Ruud 14.3 SEER 2 Straight Cool Split System is an essential step that should be approached with caution. Mistakes can lead to system damage or pose serious safety risks. Always follow local electrical codes and obtain any necessary permits.

Here's a general guide to making electrical connections for the system:

  1. Safety First:

    • Turn off the main power at the circuit breaker or fuse box.
    • Use a voltage tester to ensure there's no active current in the wires you're working with.
    • Wear safety gear like insulated gloves and safety goggles.
  2. Outdoor Condensing Unit:

    • The condenser typically requires a 220/240V connection.
    • Install a disconnect box near the condenser. This allows the power to be shut off directly at the unit, which is useful during maintenance or emergencies.
    • Connect the wiring from the disconnect box to the condenser, making sure to match the wire colors or labels to the appropriate terminals.
    • Ensure proper grounding of the condensing unit.
  3. Indoor Air Handler:

    • The air handler may require its own 110/220V circuit, depending on its specifications.
    • Connect the power supply to the air handler, ensuring you match the wires to the correct terminals.
    • The air handler will have a connection for the thermostat wires, typically labeled with letters (R, W, Y, G, etc.). Connect the thermostat wires to the corresponding terminals.
  4. Thermostat:

    • If you're installing a new thermostat, position it in a central location away from direct sunlight, drafts, and other heat sources.
    • Run the thermostat wire to the air handler and connect them to the appropriate terminals.
    • Also, connect the other end of the thermostat wire to the thermostat, ensuring the wires match the labeled terminals.
    • Many modern thermostats require a common wire (often labeled "C") for power. Ensure this connection is made if necessary.
  5. Double-check Connections:

    • Before restoring power, review all your connections.
    • Ensure that wires are connected securely and that wire nuts, if used, are tight and properly insulated.
    • Check that there are no exposed or frayed wires.
  6. Power On and Testing:

    • Restore power at the circuit breaker or fuse box.
    • Turn on the thermostat and set it to cooling mode.
    • The system should start up, and both the air handler and condenser should function. Listen for any unusual sounds and ensure the system begins to cool effectively.
    • Check the disconnect box and any other junctions to ensure there are no signs of arcing or overheating.

It's important to emphasize that electrical work, especially with high-voltage systems like HVAC units, can be dangerous. If you're unsure about any aspect of the electrical connections or if you're unfamiliar with electrical work in general, please hire a licensed electrician or HVAC technician to complete the installation. Proper installation will ensure the safety and efficiency of your Ruud 14.3 SEER 2 Straight Cool Split System.

  1. Ductwork:

Ductwork is essential for efficient and even distribution of conditioned air throughout your home. Proper duct installation is crucial to maintaining the efficiency of your HVAC system and ensuring comfort.

Here's a general guide for installing ductwork for a Ruud 14.3 SEER 2 Straight Cool Split System:

  1. Planning:

    • Start by creating a ductwork layout or plan. This will help you determine the most efficient paths for duct runs and identify where you need supplies, returns, and how much material you'll require.
    • Consider factors like the location of the air handler, the layout of your home, and potential obstacles in the path.
  2. Materials:

    • Select the appropriate duct type. Flexible ducts are easier to install in complex spaces, while rigid metal ducts are durable and less likely to leak if installed correctly.
    • Purchase the required connectors, like elbows, tees, wyes, and reducers as per your plan. Also, buy sealing materials like mastic or metal-backed tape.
  3. Safety First:

    • Wear safety gear, including gloves, safety goggles, and a dust mask when cutting or securing ductwork.
    • Ensure the area is well-ventilated if using sealants.
  4. Installation:

    • Begin by installing the main duct trunks, starting from the air handler and extending outward. Secure them with hangers or straps to joists or rafters.
    • Attach branch ducts to the main trunks using appropriate connectors. These will lead to individual rooms.
    • Install supply registers in rooms, preferably near windows or exterior walls, and return grilles on interior walls.
    • If using flexible ducting, ensure it's stretched tight between points to reduce resistance and increase efficiency. Avoid sharp bends.
    • Seal all joints and connections with mastic or metal-backed tape to prevent leaks. This improves efficiency and comfort.
  5. Balancing and Dampers:

    • Consider installing manual dampers in the ducts. This allows for balancing the system, ensuring even airflow throughout the home.
    • Once the system is operational, adjustments can be made to ensure each room receives an appropriate amount of conditioned air.
  6. Insulation:

    • Insulate ducts, especially if they run through unconditioned spaces like attics or crawlspaces. This reduces heat loss or gain and improves system efficiency.
    • Use insulation with a vapor barrier to prevent moisture buildup.
  7. Testing:

    • Once everything is installed and sealed, run the system and check for any obvious leaks or issues.
    • Adjust dampers as needed to ensure balanced airflow.
  8. Maintenance:

    • Periodically inspect the ductwork for any damages, leaks, or obstructions. Address any issues promptly to maintain efficiency and air quality.

Remember, poor duct installation can significantly reduce the efficiency of your HVAC system, leading to higher energy bills and reduced comfort. It's advisable to get the ductwork installation inspected by an HVAC professional, even if you choose to do it yourself. If you're unsure about any aspect of the installation, consider hiring a professional to ensure proper and efficient installation.

  1. Smart Thermostat:

Installing a smart thermostat can greatly improve the convenience and efficiency of your HVAC system. Many smart thermostats offer features like remote control via smartphone apps, learning schedules, energy usage statistics, and integration with smart home systems. Here's a generalized guide to installing a smart thermostat for a Ruud 14.3 SEER 2 Straight Cool Split System:

  1. Safety First:

    • Turn off the power to your HVAC system at the circuit breaker to ensure safety while working on the thermostat.
  2. Remove Old Thermostat:

    • Carefully remove the faceplate of your old thermostat.
    • Take a picture or make a note of the current wire connections for reference.
    • Disconnect the wires, but ensure they don't fall back into the wall. You can tape them to the wall or wrap them around a pencil to keep them in place.
    • Unscrew and remove the old thermostat's mounting plate.
  3. Install Smart Thermostat Base:

    • Thread the wires through the new thermostat's base or mounting plate.
    • Using the provided screws and anchors, secure the mounting plate to the wall.
    • Ensure the base is level for a clean appearance and optimal operation.
  4. Wire the Smart Thermostat:

    • Connect the HVAC wires to the corresponding terminals on the smart thermostat. The terminals are typically labeled (e.g., R, W, Y, G, C).
    • Many smart thermostats require a common wire (often labeled "C") for continuous power. If your old thermostat did not use a C wire, and there's no extra wire behind the wall, you might need to use an adapter (often provided with the thermostat) or run a new wire.
    • Press the wires into the wall and ensure they don't interfere with the thermostat's connection to its base.
  5. Attach the Thermostat:

    • Once the wires are connected, attach the smart thermostat faceplate to the base or mounting plate.
    • Some models may simply click into place, while others might require tightening screws.
  6. Restore Power and Setup:

    • Turn the power back on at the circuit breaker.
    • The smart thermostat should power up. Follow the on-screen instructions to set up the thermostat. This often includes selecting your HVAC system type, configuring Wi-Fi settings, and setting up an initial temperature schedule.
    • Many smart thermostats will guide you through a system test to ensure proper functioning.
  7. Install and Setup Mobile App:

    • Most smart thermostats offer a mobile app for remote control. Download the app on your smartphone and follow the instructions to pair your thermostat.
    • The app can often be used to monitor energy usage, set schedules, receive alerts, and integrate with other smart home devices.
  8. Enjoy and Monitor:

    • Over the next few days, monitor the system to ensure the thermostat is operating correctly.
    • Adjust settings and schedules as necessary for optimal comfort and efficiency.

Note: While many homeowners can install a smart thermostat themselves, if you're uncomfortable with the process or encounter unexpected wiring situations, consider hiring a professional. Compatibility is essential, so always ensure the smart thermostat you choose is compatible with the Ruud 14.3 SEER 2 Straight Cool Split System.

  1. Vacuum and Charge:

Vacuuming (evacuating) and charging are critical steps in the HVAC installation process. Properly evacuating the lines removes moisture and non-condensables that can lead to system inefficiency or even damage. Charging ensures the system has the right amount of refrigerant for optimal performance.

Safety First: Always wear safety gear, including safety goggles and gloves, when working with refrigerants. Remember, refrigerant handling requires EPA certification in the U.S., and many other countries have similar regulations.

Vacuum (Evacuation):

  1. Connect Manifold Gauges: Attach your manifold gauge set to the service valves. Connect the blue hose to the suction side (larger line) and the red hose to the high side (smaller line).

  2. Connect Vacuum Pump: Attach the vacuum pump to the manifold gauge's middle (yellow) hose.

  3. Open Valves: Open both the high and low valves on the manifold gauge set.

  4. Start the Vacuum: Turn on the vacuum pump. You'll be drawing a vacuum on the system to remove moisture and air.

  5. Monitor Pressure: Watch the gauge's pressure. The goal is usually to reach a vacuum level of 500 microns. This process can take anywhere from 15 minutes to several hours, depending on the system's size and the quality of the vacuum pump.

  6. Check for Leaks: Once you've reached the desired vacuum level, close the manifold gauges and turn off the vacuum pump. Observe the pressure for 15-30 minutes. If the pressure rises above 500 microns, there may be a leak or moisture still in the system that you need to address.

  7. Disconnect Vacuum Pump: Once the vacuum holds steady, disconnect the pump.


  1. Check Refrigerant Type: Ensure you're using the correct refrigerant type specified for your Ruud system.

  2. Connect Refrigerant Cylinder: Connect your manifold gauge set's middle (yellow) hose to the refrigerant cylinder. Ensure the cylinder is upright to avoid introducing liquid refrigerant into the compressor, which can cause damage.

  3. Purge Air: Before opening the system valves, slightly open the refrigerant cylinder and purge a small amount of refrigerant from the yellow hose to ensure there's no air in the line.

  4. Charge the System: Open the appropriate service valve(s) on the unit, and let the system draw the refrigerant in. Monitor the pressure on the manifold gauges.

  5. Monitor System: Once you believe you've added the appropriate amount of refrigerant, observe the system's operation. Check the temperature difference across the evaporator coil and the temperature of the lines at the condensing unit. These readings can help you determine if the charge is correct.

  6. Adjust as Needed: Based on your observations and measurements, you may need to add or remove refrigerant to get the system operating at peak efficiency.

  7. Disconnect Manifold Gauges: Once you've properly charged the system and ensured there are no leaks, disconnect your manifold gauge set.

Remember to always follow the manufacturer's guidelines for the specific charge amount and procedures. Charging by "feel" or guesswork can result in an inefficient system or potential damage. If you're not experienced or certified to handle refrigerants, it's strongly recommended to hire a licensed HVAC technician to complete this task.

  1. Start-up and Test:

Starting up and testing your Ruud 14.3 SEER 2 Straight Cool Split System ensures it operates correctly, efficiently, and safely. This is the final checkpoint in the installation process. Here's a step-by-step procedure for the start-up and testing of your system:

  1. Safety First:

    • Ensure all power is off at the circuit breaker.
    • Double-check all electrical connections for proper installation.
    • Confirm that all refrigerant lines are correctly connected, and service valves are open.
  2. Inspect the Installation:

    • Make sure the air handler/furnace and condensing unit are securely fastened and level.
    • Ensure that the condensate drain is appropriately pitched and free of obstructions.
    • Double-check duct connections to ensure there are no gaps or leaks.
  3. Thermostat Setting:

    • Set the thermostat to the "OFF" position.
    • If it's a new thermostat, ensure that it's appropriately configured for a straight cool system.
  4. Power Up:

    • Turn on the circuit breaker to supply power to the air handler/furnace and condensing unit.
    • Turn on the disconnect switch at the condensing unit (if applicable).
  5. Initial Start-Up:

    • Set the thermostat to "COOL" and lower the temperature setting below the room temperature.
    • The system should start, and you should hear the indoor unit and outdoor condensing unit begin to operate.
  6. Observe Operation:

    • Listen for any unusual sounds from both the indoor and outdoor units. There shouldn't be any grinding, screeching, or loud rattling noises.
    • Ensure that air is flowing through the supply registers and being returned through the return grilles.
  7. Check the Temperature:

    • Using a thermometer, measure the temperature of the air coming out of a supply register.
    • Measure the air temperature going into the return grille.
    • There should be a temperature difference (often referred to as "Delta T") of about 15-20°F (8-11°C) for most systems. This can vary based on numerous factors, so refer to the manufacturer’s guidelines.
  8. Inspect Refrigerant Lines:

    • The suction line (larger line) should feel cool to the touch.
    • The liquid line (smaller line) should feel warm but not excessively hot.
    • Ensure there's no frost forming on either line near the service valves.
  9. Check Drainage:

    • Inspect the condensate drain to ensure water is flowing smoothly from the evaporator coil and draining away properly.
  10. Inspect the Outdoor Unit:

    • The fan should be operating smoothly.
    • Check for any signs of refrigerant oil leaks around connections.
    • Ensure the unit is drawing air in from the sides and exhausting it out the top.
  11. Shutdown Test:

    • Increase the thermostat's temperature setting above room temperature.
    • The system should shut down smoothly.
    • Set the thermostat back to "COOL" and decrease the temperature setting; the system should restart.
  12. Safety Features Check:

    • If your system has safety features, like a float switch in the condensate drain line, test to ensure it shuts off the system if activated.
  13. Thoroughly Document Everything:

    • Make note of the system's operational status, including any measurements you took.
    • This can be valuable for future maintenance or troubleshooting.

If you encounter any issues, unusual noises, or if the system isn't cooling properly, it's advisable to shut it down and consult with a licensed HVAC technician. Proper start-up and testing will ensure the longevity and efficiency of your Ruud 14.3 SEER 2 Straight Cool Split System.

  1. Final Considerations:

    • Ensure you have installed an appropriate-sized condensate drain line from the air handler.
    • Insulate any refrigerant lines running outside to prevent energy loss.
    • Ensure all covers, panels, and guards are replaced and secure.

Remember, HVAC installations should adhere to local building codes and regulations. Always pull any necessary permits, and consider having the final installation inspected to ensure safety and efficiency.

If you're not experienced with HVAC installations, I'd advise against doing it yourself. Mistakes can lead to inefficient operation, higher energy costs, and even dangerous conditions. Hiring a professional ensures the job is done right, and most professionals will offer warranties on their work.