Laing LHB08100085
Laing LHB08100085 Low Flow Circulating Pump
Model: LHB08100085 | Brand: Laing
1. Product Overview
The Laing LHB08100085 is a low flow circulating pump designed for efficient hot water recirculation in plumbing systems. Its low flow design minimizes flow velocities, which helps in reducing pipe erosion and mitigating noise caused by vibration. This pump is a direct replacement for older models such as SM-303-BTW.
Key features include:
- Rated for temperatures up to 230°F (110°C) and line pressures up to 150 PSI.
- Requires only 33 watts of power for operation.
- Equipped with a dry run cutout for hot water recirculation applications.
- Features a BS 1/2-Inch brass inline housing with 1/2-Inch threaded fittings for easy integration.
- Operates on 115 Volts.
- Timer not included.
2. Safety Information
WARNING: Risk of electric shock.
- This pump has not been investigated for use in swimming pool or marine areas.
- Acceptable for indoor use only.
- For use with maximum 88°C (203°F) water.
- For supply connection, use wires acceptable for at least 105°C (221°F).
- Use copper conductors only.
CAUTION:
- This pump has been evaluated for use with water only.
- This is a non-submersible pump. Do not submerge.
To reduce the risk of electric shock, always refer to this instruction manual for proper installation and operation.
Figure 2.1: Safety and Specification Label on Pump
3. Installation and Setup
Installation should be performed by a qualified professional to ensure proper function and safety. Always disconnect power before beginning any installation or maintenance work.
3.1 Plumbing Connection
The pump features 1/2-inch threaded brass inline housing. Connect the pump into your hot water recirculation line using appropriate plumbing fittings. Ensure all connections are watertight to prevent leaks.
Figure 3.1: Pump with Threaded Connections
3.2 Electrical Connection
The pump operates on 115 Volts. Connect the pump to a grounded 115V power outlet. Use copper conductors only for electrical wiring, and ensure wires are rated for at least 105°C (221°F). It is recommended to connect the pump to a Ground Fault Circuit Interrupter (GFCI) protected outlet for added safety.
Figure 3.2: Pump with Variable Speed Dial
4. Operation
Once installed and connected to power, the pump is ready for operation. The pump features a variable speed dial located on its body, allowing you to adjust the flow rate.
4.1 Adjusting Flow Rate
Turn the dial to the desired setting. Settings typically range from 1 (lowest flow) to 5 (highest flow). A green LED indicator light will illuminate when the pump is operating, confirming it is receiving power and circulating water.
Note: Avoid setting the flow rate to the absolute minimum (1) or maximum (5) as this may, in some systems, cause the pump to error out on start-up or not initiate pumping correctly. Settings between 2 and 4 are generally recommended for optimal performance.
5. Maintenance
Regular maintenance ensures the longevity and efficient operation of your Laing circulating pump.
- Periodic Inspection: Regularly inspect the pump and all plumbing connections for any signs of leaks, corrosion, or wear. Address any issues promptly.
- Cleanliness: Keep the area around the pump clean and free from debris to ensure proper ventilation and prevent obstruction.
- System Flushing: If your system experiences significant mineral buildup, periodic flushing may be necessary to maintain optimal flow and pump efficiency.
- Component Replacement: When replacing an older pump, it is often advisable to also replace the pump housing and any associated check or swing valves, as these components can accumulate corrosion and deposits over time, affecting system performance.
6. Troubleshooting
This section provides solutions to common issues you might encounter with your circulating pump.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump not starting | No power; Incorrect dial setting; Electrical issue | Check power supply (115V). Ensure pump is plugged in. Adjust variable speed dial away from extreme settings (1 or 5). Verify electrical connections. |
| No flow or reduced flow | Air in system; Blockage; Incorrect dial setting | Bleed air from the system. Check for obstructions in pipes or pump. Adjust variable speed dial to a higher setting (e.g., 3 or 4). |
| Unusual noise from pump | Air in system; Loose mounting; Internal debris | Bleed air from the system. Ensure pump is securely mounted. If noise persists, professional inspection may be required. |
| Green LED not lit | No power; Pump not operating | Check power connection. Verify pump operation. If pump is running but LED is off, contact support. |
7. Specifications
| Specification | Value |
|---|---|
| Brand | Laing |
| Model Number | LHB08100085 |
| Voltage | 115 Volts |
| Power Consumption | 33 Watts |
| Material | Brass |
| Style | Circulator |
| Connections | 1/2-Inch Threaded Fittings |
| Max Temperature | 230°F (110°C) |
| Max Line Pressure | 150 PSI |
| Item Weight | 0.01 Ounces (Shipping weight may vary) |
| Part Number | LHB08100085 |
| UPC | 733886744118 |
8. Warranty Information
The Laing LHB08100085 circulating pump is warranted against defects in materials and workmanship for 2 years from the date of manufacture or 1 year from the date of user purchase, whichever is sooner. Please retain your proof of purchase for warranty claims.
9. Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Laing customer service or consult a qualified plumbing professional.
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