Aprilaire 700 Automatic Humidifier Installation Guide
Attention Installer: This Aprilaire 700 humidifier requires a qualified HVAC professional for installation, adhering to all local codes to prevent electrical shock hazards.
Safety Precautions & Warnings
WARNING: Improper installation can lead to serious injury from electrical shock. This Aprilaire 700 humidifier installation must be performed by a qualified heating and air conditioning contractor. Always disconnect power to the furnace before commencing any wiring connections.
CAUTION: Ensure compliance with all local, state, and federal codes during installation. Do not exceed the maximum water pressure limit of 125 psi; pressure reduction measures may be necessary. Models 700 and 700M are unsuitable for ducts with horizontal airflow, potentially reducing performance.
When used with an Aprilaire Digital Humidifier Control or heat pump systems, utilize a hot water supply to supplement reduced air temperature for optimal evaporation. For downflow furnaces, confirm the blower continues operation post-heat call to prevent control damage from elevated temperatures.
Qualified Installer Requirement
Crucially, the Aprilaire 700 automatic humidifier installation demands a qualified heating and air conditioning contractor. This isn’t a DIY project; professional expertise is non-negotiable. A qualified installer possesses the necessary knowledge of HVAC systems, electrical wiring, and plumbing to ensure a safe and effective installation.
They understand and will adhere to all applicable local, state, and federal codes, guaranteeing a compliant system. Their training allows them to accurately assess ductwork suitability, water pressure, and furnace operation – critical factors for optimal performance and longevity of the humidifier.
Attempting installation without proper qualifications risks electrical shock, water damage, and voiding the product warranty. Prioritize safety and system integrity by engaging a certified professional for your Aprilaire 700.
Local Code Compliance
Installation of the Aprilaire 700 automatic humidifier must strictly adhere to all prevailing local, state, and federal codes. These regulations are in place to ensure safety, proper functionality, and prevent potential hazards. Codes often dictate requirements for electrical connections, plumbing, and ductwork modifications.
Specifically, concerning water pressure, codes may necessitate pressure reduction if exceeding 125 psi to protect the humidifier from damage. Electrical work must comply with the National Electrical Code (NEC) or local equivalents, ensuring proper grounding and wiring practices.
The qualified installer is responsible for understanding and implementing these codes. Failure to comply can result in fines, system malfunctions, and voided warranties. Always verify current code requirements with your local building department before commencing installation.
Water Pressure Limits
Maintaining appropriate water pressure is crucial for the reliable operation and longevity of your Aprilaire 700 automatic humidifier. Installation sites must not exceed a maximum water pressure of 125 psi. Higher pressures can cause significant damage to the humidifier’s internal components, leading to leaks and malfunctions.
If your water supply consistently exceeds this limit, a pressure-reducing valve (PRV) must be installed on the water line before connecting it to the humidifier. This valve will regulate the water pressure, ensuring it remains within the safe operating range.
Always consult local plumbing codes regarding pressure reduction requirements. Proper adherence to these limits safeguards your investment and ensures consistent, efficient humidification. Ignoring these warnings may void the product warranty.
Installation Preparation
Before beginning, assess ductwork suitability, gather necessary tools and materials, and consider hot water supply needs for optimal Aprilaire 700 performance.
Tools and Materials Needed
Successful Aprilaire 700 installation demands specific tools and materials. You’ll require a screwdriver set (Phillips and flathead), wire strippers, and a voltage tester for safe electrical connections.
A drill with appropriate bits is essential for mounting the humidifier unit and control. Plumbing necessities include pipe cutters, Teflon tape, and appropriate fittings for the water line connection.
Ensure you have a level to guarantee proper unit alignment. Duct tape or mastic sealant is needed for airtight ductwork connections. The installation kit, specifically designed for the Aprilaire 700, should include mounting hardware, a water supply tube, and potentially a saddle valve.
Finally, a multimeter can be helpful for verifying wiring continuity and voltage. Always consult the complete installation manual for a comprehensive list tailored to your specific setup.
Ductwork Suitability Assessment
Before commencing Aprilaire 700 installation, a thorough ductwork assessment is crucial. Models 700 and 700M are explicitly not recommended for ducts featuring horizontal airflow, as this significantly diminishes performance.
Inspect the return air ductwork for size and structural integrity. The duct must be sufficiently robust to accommodate the humidifier unit’s weight and airflow restrictions. Ensure adequate space exists for proper mounting and access for future maintenance.
Verify the ductwork is free from obstructions, such as sharp bends or significant debris, that could impede airflow. Consider duct insulation levels; proper insulation minimizes condensation and maximizes humidification efficiency.
A professional HVAC technician should evaluate the overall duct system to confirm its suitability for the Aprilaire 700, ensuring optimal performance and longevity.
Hot Water Supply Consideration
When installing the Aprilaire 700 humidifier, utilizing a hot water supply is strongly advised when paired with an Aprilaire Digital Humidifier Control or installed within a heat pump system. The introduction of heated water effectively compensates for the reduced supply air temperature, providing supplemental heat crucial for efficient evaporation.
This is particularly important in colder climates or systems where maintaining adequate evaporation rates is challenging. Hot water enhances the humidifier’s ability to add moisture to the air, improving overall comfort and indoor air quality.
Ensure the hot water supply is readily accessible and meets the humidifier’s temperature and pressure requirements. Proper plumbing connections are essential to prevent leaks and ensure safe operation.
Consult local plumbing codes and a qualified technician to verify compliance and ensure a secure hot water connection for your Aprilaire 700.
Blower Operation for Downflow Furnaces
When installing an Aprilaire Humidifier Control on a downflow furnace, a critical consideration is ensuring continued blower operation even after the heat call has been satisfied. This continued airflow is vital to dissipate any residual heat buildup within the humidifier control itself.
Without this post-heat blower run, elevated temperatures can potentially damage the sensitive electronic components of the control, leading to malfunction or premature failure. The extended blower operation effectively prevents overheating and safeguards the humidifier’s functionality.
Verify your furnace control board is configured to support this post-heat blower delay. Consult your furnace’s documentation or a qualified HVAC technician for assistance with this setting. Proper configuration is essential for reliable and long-lasting performance of your Aprilaire 700 system.
Installation Process
Begin by carefully positioning the humidifier control within the cold air return duct, referencing the enclosed wiring diagram for correct electrical connections.
Humidifier Control Placement
Proper placement of the Aprilaire Humidifier Control is crucial for accurate humidity sensing and optimal performance. The control must be installed within the cold air return duct, ensuring it’s exposed to representative airflow from the entire heated space.
Avoid locations directly in the path of airflow immediately after the furnace blower, as this can lead to inaccurate readings. Similarly, do not install the control near supply air registers or return air grilles. The ideal position is typically on a straight section of ductwork, at least two feet away from any bends, obstructions, or heating/cooling equipment.
For downflow furnace installations, it’s particularly important to ensure the blower continues running after a heat call is satisfied. This prevents high temperatures from potentially damaging the control unit. Securely mount the control using the provided hardware, following the detailed instructions included in the installation template.
Wiring Diagram Reference
Accurate wiring is paramount for safe and effective operation of the Aprilaire 700 humidifier. Always consult the detailed wiring diagram included with both the humidifier and the Aprilaire Humidifier Control for specific connections. This diagram illustrates the proper connections for power supply (typically 24VAC), the humidifier solenoid valve, and any associated fan controls.
Carefully identify all wires before making connections, and ensure all connections are secure and insulated. When installing with an Aprilaire Digital Humidifier Control, follow the diagram’s instructions for connecting the control’s output to the humidifier’s valve.
For detailed installation wiring instructions, refer to the Humidifier Safety and Installation Instructions provided with the unit. Incorrect wiring can lead to equipment damage or create a safety hazard; if unsure, consult a qualified HVAC technician.
Humidifier Unit Mounting
Securely mounting the Aprilaire 700 is crucial for stable operation and preventing vibrations. The unit is designed for installation within the ductwork, typically in the return air stream. Ensure the chosen location provides adequate clearance for servicing and water line connections.
Utilize the provided mounting template to mark the necessary cutouts in the ductwork. Carefully cut and prepare the opening, ensuring a snug fit for the humidifier housing. Use appropriate fasteners – screws or sheet metal screws – to firmly attach the unit to the ductwork, avoiding any gaps or loose connections.
Models 700 and 700M are not suitable for horizontal airflow ducts, as performance will be reduced. Verify proper orientation before final mounting.
Water Line Connection
Connecting the water line to the Aprilaire 700 requires careful attention to prevent leaks and ensure proper operation. First, shut off the water supply to the chosen connection point. Utilize a saddle valve or a dedicated water supply line – avoid tapping into hot water lines unless specifically required for heat pump systems or when using the Aprilaire Digital Humidifier Control.
Connect the provided tubing securely to both the humidifier’s water inlet and the water supply. Ensure a tight fit using appropriate fittings and clamps. Do not exceed 125 psi of water pressure; pressure reduction may be necessary to comply with local codes and prevent damage.
Slowly turn the water supply back on and carefully inspect all connections for leaks. Address any leaks immediately before proceeding.
Post-Installation & Setup
After installation, set the humidifier control initially to match your home’s conditions, referencing Table 1 in the Operation Guide for optimal performance.
Initial Humidifier Control Setting
During the first heating season, careful adjustment of your Aprilaire Humidifier Control is crucial for achieving optimal humidity levels within your home. Begin by setting the control to a moderate level, considering your home’s existing conditions – insulation, air tightness, and typical winter temperatures.
It’s recommended to start with a lower setting and gradually increase it until you reach a comfortable humidity level, generally between 35% and 50%. Regularly monitor the humidity using a separate hygrometer to ensure accurate readings.
Refer to the detailed Operation Guide (specifically Table 1) for a comprehensive understanding of the control settings and their corresponding humidity outputs. Remember that individual homes vary, so experimentation may be necessary to find the ideal setting for your specific environment. Consistent monitoring and adjustment will ensure efficient and comfortable operation.
Operation Guide Reference (Table 1)
Table 1 within the Aprilaire Operation Guide provides a crucial reference for understanding the relationship between humidifier control settings and expected humidity outputs. This table details various settings, ranging from lower humidity levels for tighter homes to higher settings for older, less insulated dwellings.
It’s essential to consult this table during the initial setup and throughout the heating season to fine-tune the humidifier’s performance. The guide correlates control dial positions with approximate relative humidity percentages, allowing for informed adjustments.
Remember that these are estimations, and actual humidity levels may vary based on individual home characteristics. Regularly cross-reference the table with readings from a separate hygrometer for precise humidity management. Utilizing Table 1 ensures optimal comfort and prevents potential issues like condensation.
Performance Monitoring
Consistent performance monitoring is vital after installing the Aprilaire 700. Regularly check the humidifier’s operation during the heating season, observing for adequate moisture output and consistent humidity levels throughout the home. Utilize a separate hygrometer to verify the accuracy of humidity readings, comparing them to the settings on the humidifier control.
Inspect the water line connections for leaks and ensure the water panel is functioning correctly, exhibiting even water distribution. Listen for unusual noises during operation, which could indicate a mechanical issue.
Document humidity levels and any observed issues to track performance trends and facilitate troubleshooting. Proactive monitoring allows for timely adjustments and prevents potential problems, ensuring optimal comfort and efficiency.
Troubleshooting Common Issues
If the Aprilaire 700 isn’t functioning correctly, begin by verifying the water supply is fully on and the water line isn’t kinked or frozen. Check the humidifier control settings, ensuring they align with desired humidity levels. A lack of humidity could indicate a faulty water panel or solenoid valve – inspect for mineral buildup or damage.
For excessive humidity, lower the control settings. If the unit makes unusual noises, inspect the blower fan and water distribution components. Electrical issues require a qualified technician; never attempt self-repair.
Refer to the Operation Guide (Table 1) for specific error codes and solutions. Consistent issues may necessitate professional service to diagnose and resolve underlying problems effectively.
Model Specifics
Aprilaire 700 and 700M differ in fan power; the 700M is fan-powered, while various installation kits are available for both models.
Aprilaire 700 vs. 700M Differences
The Aprilaire 700 and 700M whole-house humidifiers share core functionality but possess a key distinction: the 700M incorporates a built-in, fan-powered design. This integrated fan actively draws air across the evaporator pad, enhancing moisture pick-up and distribution throughout the ductwork, particularly beneficial in systems with limited static pressure or longer duct runs.
Conversely, the standard Aprilaire 700 relies on the furnace blower’s airflow to operate. While effective in many applications, its performance can be impacted by weaker blower motors or extensive duct systems. Consequently, the 700M generally offers superior humidification capacity and consistency, especially in challenging HVAC setups.
Choosing between the two models depends on your specific system characteristics and desired level of humidification. Consider ductwork layout, blower motor strength, and overall home size when making your decision.
Installation Kit Options
Aprilaire offers several installation kits designed to streamline the setup of your 700 or 700M whole-house humidifier. These kits typically include essential components like mounting hardware, water line connectors, and saddle valves for easy connection to your home’s water supply.
Specific kit variations cater to different furnace types and ductwork configurations. Some kits are optimized for downflow furnaces, while others are designed for horizontal airflow systems. Ensure you select a kit compatible with your HVAC setup for a secure and efficient installation.
Additionally, dedicated kits are available for pairing with Aprilaire Digital Humidifier Controls, providing a complete and integrated humidification solution. Always verify the kit contents align with your needs before purchase, referencing the Aprilaire catalog or consulting with a qualified HVAC professional.