aprilaire 600 installation guide
Summary
Discover the comprehensive Aprilaire 600 installation guide. Easy, step-by-step instructions to help you install your system efficiently. Get it done right!

The Aprilaire 600 is a high-efficiency whole-house humidifier designed to provide optimal indoor air quality. It features a built-in bypass damper and automatic digital control for precise humidity management, ensuring a comfortable and healthy home environment. Its evaporative design and low-maintenance operation make it a popular choice for homeowners seeking reliable humidity control;
1.1 Overview of the Aprilaire 600 Model
The Aprilaire 600 is a whole-house humidifier designed for homes up to 6,200 square feet. It features an evaporative system, providing efficient humidity control without over-saturation. The unit includes a built-in bypass damper and operates without a floor drain, making it a versatile choice for various HVAC systems. Its compact design allows installation on either the supply or return plenum, and it is compatible with both single and two-stage furnaces. The Aprilaire 600 is known for its quiet operation and low maintenance requirements, ensuring a comfortable indoor environment year-round.
1.2 Key Features and Benefits
The Aprilaire 600 offers advanced features like automatic digital control for precise humidity levels and a built-in bypass damper for efficient airflow. It operates quietly and requires minimal maintenance. The unit is compatible with various HVAC systems, including heat pumps, and can be installed on either the supply or return plenum. Its evaporative technology prevents over-humidification, ensuring a healthy indoor environment. The Aprilaire 600 also includes a 24V transformer and a manual humidifier control, providing flexibility and ease of use for homeowners seeking reliable humidity management.
Safety Precautions and Installation Requirements
Ensure power and water are turned off before installation. Avoid installing in areas prone to freezing; Follow local codes and manufacturer guidelines strictly. Always use a qualified installer and ensure proper electrical connections for safe operation.
2.1 General Safety Guidelines
Ensure all safety precautions are followed to avoid risks during installation. Shut off power and water supply before starting. Avoid installing in areas prone to freezing or near cooling coils. Do not exceed 125 psi water pressure to prevent damage. Keep the humidifier away from unheated spaces to avoid condensation issues. Always adhere to local and federal codes. Installation must be performed by a qualified HVAC professional to prevent electrical shock or component failure. Proper grounding and wiring are essential for safe operation.
2.2 Installation Requirements and Recommendations
The Aprilaire 600 requires a 120 VAC power source, separate from the furnace blower circuit. Ensure the installation location allows easy access for maintenance. The humidifier should be installed on the supply or return plenum, avoiding restricted airflow areas. Use the provided installation template to ensure proper leveling and alignment. Mounting screws and a water supply line must be supplied by the installer. The bypass duct should be sized correctly to match the system’s airflow requirements. Always follow local codes and manufacturer guidelines for a safe and efficient setup.
Installation Template and Preparation
The Aprilaire 600 installation template ensures proper alignment and leveling. Use it to mark mounting holes and duct connections accurately. Ensure the template is level before proceeding.
3.1 Understanding the Installation Template
The installation template for the Aprilaire 600 simplifies the mounting process. It outlines precise locations for holes and connections, ensuring accurate placement. Use the template to mark the furnace or ductwork surface, guaranteeing proper alignment. This step is crucial for maintaining the humidifier’s efficiency and functionality. Always ensure the template is level to avoid installation issues. Follow the provided markings carefully to secure the unit correctly.
3.2 Preparing the Furnace and Ductwork
Before installing the Aprilaire 600, ensure the furnace and ductwork are properly prepared. Shut off power and water supplies to prevent accidents. Clean the area around the furnace to ensure clear access. Verify that the ductwork is compatible with the humidifier’s dimensions and airflow requirements. Check for any leaks or damage in the ducts and repair them before proceeding. Ensure the furnace is operational and meets the voltage requirements specified in the manual. Proper preparation ensures a smooth and safe installation process.
Step-by-Step Installation Process
The Aprilaire 600 installation involves a systematic approach, covering mounting, duct connections, and water supply setup. Follow detailed instructions for an effortless and correct setup ensuring optimal performance and compliance with manufacturer’s guidelines.
4.1 Mounting the Humidifier
Mount the Aprilaire 600 humidifier on a level surface, ensuring stability and proper alignment. Use sheet metal screws to secure it to the furnace or ductwork, avoiding interference with serviceability. The installation template must be level to ensure accurate fitting. Choose a location that avoids freezing temperatures and allows easy access for maintenance. Ensure the humidifier is installed on either the supply or return plenum, considering its reversible design for right or left-hand bypass duct connections. Proper mounting is essential for efficient operation and longevity of the unit.
4.2 Connecting the Bypass Duct
Connect the bypass duct to the humidifier and the furnace plenum, ensuring a secure and airtight seal. Use the installation template to align the duct properly. Attach the duct using sheet metal screws, tightening firmly to prevent leaks. Ensure the bypass damper is in the correct position, either open or closed, depending on the installation requirements. Seal any gaps with foil tape to maintain airflow efficiency. Proper connection of the bypass duct is crucial for optimal humidifier performance and even moisture distribution throughout the home. Double-check the alignment and security of the duct before proceeding.
4.3 Installing the Water Supply
Install a saddle valve on the home’s water supply line, ensuring it is fully opened or closed to regulate flow. Connect a 1/4″ copper tubing from the saddle valve to the humidifier’s solenoid valve. Secure all connections with appropriate fittings and check for leaks. Mount the solenoid valve near the humidifier and ensure proper water flow. This setup allows the humidifier to draw water as needed, maintaining optimal humidity levels. Always follow local plumbing codes and ensure the water supply line is correctly sized for the system.
Wiring and Electrical Connections
Connect the 24V transformer to a 120V power source, separate from the furnace circuit. Wire the humidistat to the humidifier and solenoid valve, following the provided diagram. Ensure all connections are secure and meet safety standards to avoid electrical hazards.
5.1 Humidifier Control Wiring
The Aprilaire 600 humidifier control wiring involves connecting the 24VAC transformer to the control unit. Ensure the transformer is powered from a 120V source, separate from the furnace circuit. Wire the humidistat to the control unit, following the provided wiring diagram. Connect the solenoid valve wires to the control terminals, ensuring proper polarity. Refer to the manual for specific terminal designations (R, C, etc.). Always turn off power before making connections to avoid electrical shock. Test the wiring by turning on the humidifier and verifying proper operation.
5.2 Transformer and Power Supply Connections
Install the 24VAC transformer on a 120V circuit, separate from the furnace blower motor circuit. Ensure the transformer is powered from the hot 120VAC line before it enters the furnace. Do not wire the transformer into the furnace blower circuit, as this could cause premature component failure. Verify the correct voltage supply to the transformer to ensure proper operation. Refer to the wiring diagram for specific connections, and test the power supply to confirm it is functioning correctly before proceeding with the installation. Always follow safety guidelines to avoid electrical shock.
Post-Installation Checks and Maintenance
Test the humidifier to ensure proper operation and water flow. Regularly check water pressure, clean the evaporative pad, and verify drainage to maintain efficiency and performance.
6.1 Testing the Humidifier
After installation, turn on the humidifier and check for water flow and proper operation. Ensure the bypass damper is open and inspect the evaporative pad for saturation. Verify that the humidistat is functioning correctly by adjusting the humidity level and observing the system’s response. Also, check for leaks in water supply lines and drainage. Finally, ensure the blower motor operates continuously during testing to maintain accurate humidity levels and system efficiency. This ensures optimal performance and prevents issues.
6.2 Regular Maintenance Tips
Regular maintenance is crucial for optimal performance. Replace the water panel annually or as needed, and clean the humidifier thoroughly. Check for mineral buildup and ensure proper drainage. Inspect and clean the evaporative pad regularly to prevent mold growth. Verify that the bypass damper operates smoothly and is free of obstructions. Additionally, monitor water pressure and ensure it does not exceed 125 psi. Schedule annual professional inspections to maintain efficiency and prevent potential issues.
These steps ensure long-term reliability and effective humidity control.
Troubleshooting Common Issues
Common issues include water leaks, low humidity output, and improper bypass damper operation. Check for high water pressure, clogged pads, or faulty solenoid valves. Ensure proper installation and maintenance to resolve these problems effectively.
7.1 Identifying and Resolving Common Problems
Common issues with the Aprilaire 600 include water leaks, low humidity output, and improper bypass damper operation. Leaks often stem from faulty connections or high water pressure. Check the saddle valve and solenoid for proper function. Low humidity may result from clogged evaporative pads or incorrect damper settings. Inspect and clean pads regularly. If the bypass damper isn’t functioning, ensure it’s properly aligned and not obstructed. Addressing these issues promptly ensures optimal performance and prevents long-term damage to the system.