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City Plumbing GB£1,927.20Visit shop Navien Blue 21Kw Oil System Boiler External Lcb 700 Lsx Plcb0021sh002
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The Navien Oil System Boiler - 21kW - External is designed for larger homes needing reliable central heating and ample hot water, particularly those with more than one bathroom. Its key benefit is an A+ energy rating when paired with three Smart Plus room thermostats, offering superior efficiency and ultra-low NOx emissions thanks to its Blue Flame technology. A potential caveat is that the A+ rating is conditional on specific thermostat usage.
| Model Part Number | PLCB0021SH002 |
|---|---|
| Brand | Navien |
Blue Flame technology refers to Navien's advanced combustion system that ensures higher efficiency and produces significantly lower levels of NOx emissions compared to traditional boilers.
The A+ energy rating is achieved when the boiler is installed and operated with three Navien Smart Plus room thermostats.
This is a system boiler designed for larger homes with higher heating and hot water demands, typically those with more than one bathroom. It may be oversized for smaller properties.
HVO compatibility means the boiler can run on Hydrotreated Vegetable Oil, a sustainable biofuel. This offers a greener alternative to traditional heating oil.
Yes, as a system boiler, the Navien LCB700 requires an external hot water cylinder to store hot water. The boiler heats the water and the cylinder stores it for use.
The boiler supports flue runs of up to 21 meters in both horizontal and vertical configurations, offering considerable flexibility in installation placement.
For optimal performance, safety, and to maintain warranty, it is recommended to have the boiler serviced annually by a qualified heating engineer.
Check the oil supply, ensure the thermostat is calling for heat, and verify the boiler is receiving power. Consult the manual for error codes.
Check the hot water cylinder thermostat settings, ensure the cylinder is fully heated, and inspect for any leaks. A system imbalance may require professional adjustment.
Unusual noises could indicate an issue with the pump, fan, or internal components. Schedule a service check with a qualified engineer.
Consult the Navien LCB700 user manual to identify the specific error code and follow the recommended troubleshooting steps or contact a service engineer.
This could be due to a faulty thermocouple, gas supply issue, or combustion problem. A professional service is required.
Setup: The Navien LCB700 is designed for ease of installation with features like a combined PRV/condensate drain and flexible pipework options. Professional installation is recommended to ensure optimal performance and safety. Flueing can be arranged horizontally or vertically up to 21 meters.
Compatibility: This system boiler requires a dedicated hot water cylinder to store heated water. It is designed to work effectively with Navien Smart Plus room thermostats to achieve its A+ energy rating. It is also HVO (Hydrotreated Vegetable Oil) compatible.
Care: Regular annual servicing by a qualified technician is essential to maintain efficiency, safety, and longevity. Keep the area around the boiler clear of obstructions. Refer to the user manual for specific cleaning instructions, typically involving a damp cloth for external surfaces. Ensure filters are checked and cleaned as part of routine maintenance to prevent blockages.
