Navien Boiler - 28kW - Heat Only

The Navien LCB700 Blue Flame range of oil boilers is the first in the UK market to offer an A+ ene...

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City Plumbing GBNavien Blue 28Kw Internal Heat Only Boiler Lcb 700 Rs Plcb0028sh003
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Product Information

Full details

The Navien LCB700 Blue Flame 28kW Heat Only boiler is designed for homeowners seeking an energy-efficient and future-proof heating solution, particularly suitable for retrofits or homes with multiple bathrooms. Its key benefit is an exceptional A+ energy rating when paired with three Smart Plus thermostats, offering significant cost savings and reduced environmental impact. A potential caveat is that the highest energy rating is dependent on the installation of specific smart thermostats. This boiler features advanced Blue Flame technology for superior efficiency and ultra-low NOx emissions, alongside easy installation features and smart control capabilities via the Navien Smart Plus mobile app.

All features

Model Part NumberPLCB0028SH003
BrandNavien

Extended Product Information

FAQs

What is Blue Flame technology?

Blue Flame technology is an advanced combustion process that ensures cleaner burning with lower emissions (ultra-low NOx) and higher efficiency compared to older technologies. It achieves this by maintaining lower flue gas temperatures.

Is this boiler suitable for homes with multiple bathrooms?

Yes, as a heat-only boiler, it is designed to work with a hot water storage cylinder. The 28kW output is generally suitable for homes with moderate to high hot water demands, especially when paired with an appropriately sized cylinder.

What does 'HVO compatible' mean?

HVO compatible means the boiler can run on Hydrotreated Vegetable Oil, a sustainable and renewable fuel source. This makes the boiler a more environmentally friendly option for the future.

Can I control the boiler remotely?

Yes, when installed with the Navien Smart Plus control system, you can control and monitor your heating remotely via the Navien Smart Plus mobile app.

Do I need a hot water cylinder with this boiler?

Yes, the Navien LCB700 Blue Flame 28kW is a heat-only boiler. It requires a separate hot water storage cylinder to provide domestic hot water.

How do I achieve the A+ energy rating?

The A+ energy rating is achieved when the boiler is installed with three Navien Smart Plus room thermostats. These smart controls allow for more precise temperature management and energy optimization.

What is the warranty period for this boiler?

Please refer to the manufacturer's official documentation or contact your installer for specific warranty details, as these can vary based on registration and installation requirements.

Troubleshooting

Boiler fails to ignite or produce heat

Check the oil supply, ensure the boiler is receiving power, and verify that the thermostat is set correctly and calling for heat. If the issue persists, contact a qualified engineer.

Error code displayed on the boiler interface

Consult the Navien LCB700 user manual for a list of error codes and their specific meanings. Some codes may indicate simple resets, while others require professional diagnosis.

Low water pressure or flow

Check for leaks in the system, ensure isolation valves are open, and verify that the system's expansion vessel is correctly pressurized. A qualified engineer can assess pressure issues.

Smart control connectivity issues

Ensure your home Wi-Fi network is functioning correctly. Restart your router and the boiler's control unit. Check the Navien Smart Plus app for any updates or troubleshooting guides.

Unusual noises from the boiler

Different noises can indicate various problems, from pump operation to potential issues with the fan or heat exchanger. Contact a qualified engineer for diagnosis, as some noises may indicate a safety concern.

Pros and Cons

Pros

  • High energy efficiency (A+ rating with specific controls)
  • Environmentally friendly with ultra-low NOx emissions
  • Future-proofed with HVO compatibility
  • Designed for easy installation, saving time and labor costs
  • Smart control features offer enhanced user convenience and potential savings
  • Durable construction with a stainless steel heat exchanger

Cons

  • A+ energy rating requires specific additional smart thermostats
  • As a heat-only boiler, it requires a separate hot water cylinder
  • Smart features may require a learning curve for some users
  • Initial setup of smart controls can be complex

Setup, Compatibility & Care

Setup:

Installation should be performed by a qualified heating engineer. The LCB700 Blue Flame features integrated components like a combined PRV/condensate drain and flexible pipework options to ease the installation process. For optimal performance and to achieve the A+ energy rating, installation alongside three Navien Smart Plus room thermostats is recommended.

Compatibility:

  • Fuel: Compatible with standard heating oil and Hydrotreated Vegetable Oil (HVO).
  • Hot Water: This is a heat-only boiler, requiring a separate hot water storage cylinder. Ensure the cylinder is appropriately sized for your household's hot water demands.
  • Controls: Designed to work with Navien Smart Plus controls, including mobile app integration, Geofencing, and Smart Forecasting. It can also be compatible with other standard 230v programmable room thermostats, though the highest efficiency rating requires the Smart Plus system.

Care:

  • Annual Servicing: Regular annual servicing by a qualified engineer is crucial for maintaining efficiency, safety, and longevity. This includes checking the burner, heat exchanger, and all safety devices.
  • Cleaning: The exterior casing can be cleaned with a soft, damp cloth. Avoid abrasive cleaners. Ensure no water enters the casing.
  • Condensate Pipe: Periodically check the condensate pipe for any blockages, especially during colder months, to prevent freezing.
  • Filters: If applicable to your installation, ensure any system filters are cleaned as part of the annual service.

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