Ao Smith BTHS-750A Installation Manual: A Comprehensive Plan
This manual details the installation of the Ao Smith BTHS-750A‚ covering safety‚ tools‚ connections‚ and troubleshooting for a successful setup process.
The Ao Smith BTHS-750A is a high-efficiency electric tank water heater designed for residential use‚ offering a reliable and consistent hot water supply. This manual provides comprehensive instructions for the safe and effective installation of your new water heater. Understanding these guidelines is crucial for optimal performance and longevity of the unit.
Before beginning‚ familiarize yourself with the components and features of the BTHS-750A. Proper installation ensures years of trouble-free operation and maximizes energy savings. This guide covers everything from initial inspection and required tools to detailed connection procedures and safety precautions. Always adhere to local plumbing and electrical codes during the installation process.
Safety Precautions & Warnings
WARNING: Improper installation can lead to serious injury‚ death‚ or property damage. Always disconnect electrical power to the existing water heater before beginning any work. Ensure the water supply is shut off to prevent flooding. This unit is heavy; use appropriate lifting techniques or assistance to avoid strain or injury.
CAUTION: Hot water can scald. Verify the temperature and pressure relief valve is functioning correctly. Never operate the water heater if it appears damaged. Follow all local plumbing and electrical codes. Grounding is essential for safety; ensure proper grounding connections are made. If you are uncomfortable with any aspect of the installation‚ consult a qualified professional.
Tools and Materials Required
Essential Tools: Pipe wrench (various sizes)‚ adjustable wrench‚ screwdriver set (Phillips & flathead)‚ electrical screwdriver‚ wire strippers/crimpers‚ voltage tester‚ Teflon tape‚ pipe cutter‚ measuring tape‚ level‚ drill with appropriate bits‚ and safety glasses. A bucket and towels are also necessary for managing water during connections.
Required Materials: Appropriate diameter piping (copper‚ PEX‚ or CPVC) for water connections‚ dielectric unions (to prevent corrosion)‚ electrical wiring (matching local codes)‚ wire connectors‚ grounding wire‚ solder (if using copper pipe)‚ pipe dope‚ and a new temperature and pressure relief valve. Verify compatibility with existing plumbing and electrical systems before starting.
Unpacking and Inspection
Carefully unpack the Ao Smith BTHS-750A water heater‚ ensuring no damage occurred during shipping. Inspect the unit thoroughly for any visible dents‚ scratches‚ or signs of mishandling. Verify all components are present‚ referencing the parts list in this manual. This includes the tank itself‚ temperature and pressure relief valve‚ drain valve‚ and any included hardware.
Check the model and serial number on the unit against your purchase order. Report any discrepancies or damage immediately to the retailer and Ao Smith customer support. Do not attempt to install a damaged unit. Retain all packaging materials until the installation is complete and you are satisfied with the product’s condition.
Pre-Installation Checklist
Before beginning the installation of your Ao Smith BTHS-750A‚ ensure all local codes and regulations are met. Confirm adequate space is available for the unit‚ allowing for necessary clearances for servicing and ventilation. Verify the floor can support the filled weight of the water heater – a substantial load!
Double-check both water supply and electrical connections are readily accessible. Gather all required tools and materials (see section 3). Ensure the water supply is shut off and the electrical power is disconnected before starting any work. Review this entire manual to familiarize yourself with the installation process. Proper preparation is key to a safe and efficient installation.
Water Supply Requirements
The Ao Smith BTHS-750A requires a minimum incoming water pressure of 30 PSI‚ with a maximum of 80 PSI. If your water pressure exceeds 80 PSI‚ a pressure reducing valve must be installed. Utilize appropriate pipe materials – copper‚ CPVC‚ or PEX – compliant with local plumbing codes. Ensure all connections are watertight to prevent leaks.
A dielectric union is recommended when connecting dissimilar metals to prevent corrosion. The cold water inlet is typically ¾ inch NPT‚ while the hot water outlet is also ¾ inch NPT. Verify the water supply lines are free of debris before connecting them to the heater. Proper water supply installation is crucial for efficient operation and longevity.
Electrical Requirements
The Ao Smith BTHS-750A typically requires a dedicated 240-volt electrical circuit‚ with a breaker size of 30 amps. Confirm local electrical codes for specific requirements. A properly grounded electrical connection is absolutely essential for safety. Use copper wiring of the appropriate gauge – typically 10 AWG – based on the distance from the electrical panel.
Do not use extension cords or adapters. The unit must be directly wired to the electrical system. Ensure the power is completely disconnected at the breaker before making any electrical connections. Improper electrical installation can lead to fire hazards or equipment damage. Consult a qualified electrician if you are unsure about any aspect of the electrical installation.
Installation Steps: Water Connections
Begin by shutting off the main water supply to the building. Carefully connect the cold water inlet to a potable water source using a dielectric union to prevent corrosion. Ensure all connections are tight to avoid leaks. Use Teflon tape on all threaded fittings. Next‚ connect the hot water outlet to your existing hot water distribution system‚ again utilizing dielectric unions.
Flush the tank thoroughly before connecting the hot water outlet to remove any debris from the manufacturing process. Inspect all connections for leaks after restoring the water supply. A pressure reducing valve may be necessary if your water pressure exceeds the recommended limit. Proper water connections are crucial for efficient and safe operation.
Cold Water Inlet Connection
Prior to connecting‚ verify the cold water supply line is properly sized for the BTHS-750A. Utilize a dielectric union to connect the cold water inlet to the existing plumbing‚ preventing galvanic corrosion between dissimilar metals. Apply Teflon tape to all threaded connections‚ ensuring a watertight seal. Tighten the connection securely‚ but avoid over-tightening which could damage the fittings.
Inspect the connection for any signs of leakage immediately after restoring water pressure. Consider installing a shut-off valve upstream of the water heater for easy maintenance and future repairs. Ensure the cold water supply line is free of debris before connection to prevent clogging. Proper installation guarantees efficient operation.
Hot Water Outlet Connection
Before connecting the hot water outlet‚ ensure the existing hot water plumbing is compatible with the BTHS-750A’s specifications. Employ a dielectric union to connect the hot water outlet‚ mitigating potential corrosion issues arising from dissimilar metal contact. Wrap all threaded connections with Teflon tape to guarantee a leak-proof seal. Securely tighten the connection‚ exercising caution to avoid over-tightening and potential damage.
Immediately after restoring water flow‚ meticulously inspect the connection for any leaks. Installing a shut-off valve upstream provides convenient access for maintenance and future repairs. Verify the hot water line is clear of obstructions to prevent flow restrictions. Correct installation ensures optimal performance.
Installation Steps: Electrical Connections
Prior to commencing electrical connections‚ absolutely disconnect power at the main breaker panel. Confirm the voltage supplied matches the BTHS-750A’s requirements‚ typically 120V or 240V‚ as indicated on the unit’s data plate. Utilize appropriately sized wiring‚ adhering to local electrical codes and regulations. Follow the wiring diagram meticulously‚ ensuring correct connections for line‚ neutral‚ and ground wires.
Employ a qualified electrician if you are unfamiliar with electrical work. Double-check all connections for tightness and proper insulation. Never energize the unit until all connections are verified. Proper electrical installation is crucial for safe and efficient operation‚ preventing hazards.
Wiring Diagram Explanation
The wiring diagram‚ located inside the access panel‚ illustrates the precise connections required for the BTHS-750A. Line (hot) wires are typically black or red‚ supplying power. Neutral wires are white‚ completing the circuit. Ground wires‚ bare copper or green‚ provide a safety path for electrical faults. Pay close attention to terminal designations – L1/L2 for line‚ N for neutral‚ and G for ground.
Incorrect wiring can cause damage to the unit or create a safety hazard. Ensure wire gauge matches the circuit breaker rating. If the diagram shows multiple voltage options (120V/240V)‚ select the correct configuration based on your supply. Consult a qualified electrician if you have any doubts about interpreting the diagram.
Grounding Instructions
Proper grounding is crucial for safety‚ preventing electrical shock and protecting the BTHS-750A from damage. Connect a dedicated grounding wire (typically bare copper or green) to the grounding terminal located on the unit’s control panel. This wire must be securely connected to a grounded metal conduit‚ a grounding rod‚ or the building’s grounding system.
Never connect the grounding wire to a water pipe‚ as this can be unreliable. Verify the grounding connection with a multimeter to ensure continuity. A poor ground can render safety features ineffective. If unsure about grounding procedures‚ consult a qualified electrician. Failure to properly ground the unit voids the warranty and poses a significant safety risk.
Tank Placement and Securing
Select a level‚ stable surface capable of supporting the BTHS-750A’s filled weight. Ensure adequate clearance around the tank for maintenance and inspections – at least 30 inches of unobstructed space is recommended. Position the tank away from combustible materials and sources of extreme heat or cold. Verify the floor can handle the substantial weight‚ especially when full of water.
Secure the tank to prevent movement or tipping‚ utilizing appropriate anchoring straps or brackets. Attach these securely to wall studs or a concrete foundation. Regularly inspect the securing mechanisms for tightness and corrosion. Proper securing minimizes noise and vibration‚ extending the tank’s lifespan and ensuring operational safety.
Temperature and Pressure Relief Valve Installation
Crucially‚ install a Temperature and Pressure Relief (TPR) valve‚ compliant with local codes‚ directly onto the designated opening on the BTHS-750A tank. Ensure the valve’s discharge pipe is the same diameter as the valve outlet and constructed of an approved material like copper or CPVC. Direct the discharge pipe downwards‚ terminating within six inches of the floor‚ avoiding any obstruction.
Never cap‚ plug‚ or restrict the TPR valve discharge. Regularly test the valve manually (at least annually) to confirm proper operation. Inspect the discharge pipe for leaks or corrosion. A functioning TPR valve is a vital safety feature‚ preventing dangerous pressure buildup within the tank‚ safeguarding against potential rupture.
Initial Startup and Testing
Before initial startup‚ thoroughly flush the tank to remove debris. Open a hot water faucet somewhere in the house and fully open the cold water inlet valve to the BTHS-750A. Allow the tank to fill completely‚ letting water flow from the open faucet until it runs clear and free of sediment. Then‚ carefully inspect all water connections for leaks.
Once filled‚ turn on the power supply to the heater. Monitor the temperature setting and verify the heating element is functioning correctly. Check the TPR valve for any signs of leakage. Allow sufficient time for the water to reach the desired temperature‚ and re-inspect all connections after heating begins;
Troubleshooting Common Issues
No Hot Water: Verify the power supply and circuit breaker. Check the high-limit reset button – it may have tripped. Low Hot Water: Ensure the thermostat is set correctly and the heating element isn’t failing. Sediment buildup can also reduce efficiency.
Leaks: Inspect all water connections‚ including the inlet‚ outlet‚ and TPR valve. Tighten connections if necessary‚ but avoid over-tightening. Strange Noises: Rumbling sounds often indicate sediment buildup requiring flushing. Error Codes: Consult the full manual for specific error code definitions and recommended actions. If issues persist‚ contact a qualified technician.
Maintenance and Care
Regular Flushing: Annually flush the tank to remove sediment buildup‚ improving efficiency and extending the heater’s lifespan. This prevents rumbling noises and reduced hot water capacity. Anode Rod Inspection: Inspect the anode rod every three years‚ replacing it when significantly corroded. This protects the tank from rust.
Temperature Setting: Maintain a safe water temperature (typically 120°F/49°C) to prevent scalding and conserve energy. Exterior Cleaning: Wipe down the exterior with a damp cloth. Avoid abrasive cleaners. Professional Inspection: Schedule a professional inspection every five years for a comprehensive check of all components.
Warranty Information
Tank Warranty: Ao Smith provides a limited lifetime warranty on the water heater tank against leaks due to defects in workmanship or materials. This coverage applies to the original purchaser. Parts Warranty: A limited five-year warranty covers all other parts‚ including heating elements and controls‚ against manufacturing defects.
Labor Coverage: Labor costs for repairs or replacement are not included under the standard warranty‚ but extended labor plans are available for purchase. Warranty Registration: Register your BTHS-750A within 60 days of installation to ensure full warranty coverage. Proof of purchase is required for all claims. See the full warranty document for details and exclusions.
Frequently Asked Questions (FAQ)
Q: What water pressure is required? A: The BTHS-750A requires a minimum of 30 PSI and a maximum of 80 PSI of water pressure. Q: Can I install this unit myself? A: While possible‚ professional installation is strongly recommended to ensure safety and compliance with local codes.
Q: What size breaker is needed? A: Refer to the electrical requirements section for specific breaker size based on voltage. Q: How often should I flush the tank? A: We recommend flushing the tank annually to remove sediment and maintain efficiency. Q: What does the temperature and pressure relief valve do? A: It prevents excessive pressure buildup‚ ensuring safe operation.
Technical Specifications
Tank Capacity: 75 Gallons. Dimensions: Height ⸺ 57 inches‚ Diameter ⸺ 24 inches (approximate). Weight: 230 lbs (dry weight). Voltage: 240V (check wiring diagram for specific configurations). Wattage: 5500 Watts. Recovery Rate: First Hour Rating ─ 85 Gallons (at 90°F rise).
Maximum Water Pressure: 80 PSI. Minimum Water Pressure: 30 PSI. Temperature Range: 120°F ⸺ 140°F (adjustable). Anode Rod: Magnesium. Insulation: High-density foam. T&P Relief Valve Rating: 150 PSI / 210°F. Electrical Connection: 30 Amp breaker required. These specifications are subject to change without notice.
Contact Information & Support
Ao Smith Water Heater Customer Service: 1-800-531-2718. Available Monday-Friday‚ 8:00 AM ─ 5:00 PM EST. Website: www.aosmith.com (for FAQs‚ manuals‚ and warranty claims). Technical Support: Access detailed troubleshooting guides and installation videos online. Warranty Support: Register your product online to activate your warranty.
Local Plumber: For professional installation assistance‚ consult a licensed plumber in your area. Ao Smith Dealer Locator: Find authorized dealers near you on the Ao Smith website. Email Support: customerservice@aosmith.com (response time within 24-48 hours). Keep your model number (BTHS-750A) and date of purchase readily available when contacting support.
