Baxi Potterton BBU 15 HE manual Replace flame sensing electrode, Replace Safety Thermostat

Page 37

H

1.

Check the gas supply pressure: For Natural Gas greater than 10 - 11 mbar

2.Check and correct if necessary

1.The mechanical set of the gas valve (CO2 values - see instruction)

2.Flame sensing electrode and lead connections

3.Flame sensing electrode position

Flame current should be more than 0.5 μA

12.0 Fault Finding

YES

Replace PCB

 

NO

Replace flame sensing electrode

I

Overheat Thermostat or

 

Allow to cool. Continuity

YES

 

Condensate Safety Float Switch

 

across thermostat terminals

Replace Safety Thermostat

 

 

 

operated or faulty

 

more than 1.5 ohm

 

 

 

 

 

 

 

NO

J

Press the Service Reset switch

for 5 seconds

 

Continuity across plug

NO

 

terminals at 3 &4 of connector

 

 

 

X401 more than1.5 ohm

 

 

 

 

 

 

YES

 

 

 

 

 

YES

 

Condensate drain system fault

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

Replace Safety Float Switch

 

 

or wiring

 

 

 

 

 

Restore Boiler Control defaults

Replace PCB

Check condensate system

and Pump

K

L

Fan connections correct at fan.

PCB - X401 connector terminals 5,6,7 & 8

1.

Temperature sensors faulty. Cold resistance approximately

YES

NO

Replace fan

10kΩ @ 25° C (CH sensor)

(resistance reduces with increase in temp.)

Replace sensor

 

 

 

YES

 

2.

If pump is running the heat exchanger could be

Replace heat exchanger

 

 

 

 

obstructed

 

 

 

 

 

 

 

 

 

 

IMPORTANT:There is no limit to the number of repeated ‘Service Reset’ operations but the Boiler Control must be refreshed by ‘Restoring Boiler Control Default’ as described on p.34 following the final ‘Service Reset’ and before the Boiler Control reset is re-used.

© Baxi Heating UK Ltd 2009

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Contents Baxi Bermuda BBU 15 HE 0086 Scheme Members only Installer Notification GuidelinesLegislation Important Installation, Commissioning, Service & RepairCodes of Practice, most recent version should be used Safe Manual Handling Contents Introduction ContentsDescription Layout Fig General LayoutFlue Kit 10m & 12.5m a Bermuda HE Cbbu 15 HE Technical DataWater Circulating Systems System DetailsTreatment of Water Circulating Systems There is a drain cock supplied in the plumbing kitSystem Controls PipeworkStorage Systems Sealed Systems Figs , 7 Sealed Systems Builders Opening Fig Site RequirementsLocation Fireplace Opening & SurroundNo Horizontal Runs are Permitted FlueGas Supply Fig VentilationElectrical Supply Fig Electrical Connection Gas ConnectionCondensate Disposal Fig Condensate Drain GeneralCondensate Disposal Total volume of the sump is 1.5 litresCondensate Pump Operation From Boiler 500mm MinBoiler Internal Illustrated Wiring Diagram Boiler Internal WiringInitial Preparation InstallationFlue System Barb ‘C’ Clip Air Cowl Air Duct Collar Ribs Terminal Cap Water Connections Siting the BoilerGas Connection Electrical ConnectionCompletion Completion & CommissioningCommissioning the Boiler Test Point Annual Servicing Annual ServicingAnnual Servicing Inspection Changing Components Electrode Assembly FigChanging Components Spark Generator FigBurner Fig Fan FigSpark Generator Plug Electrode Fan Injector Burner Spark Generator Plug Gas Feed Pipe InjectorGas Valve Fig Injector Gas Valve Earth WireFloat Switches Fig Safety Thermostat FigPCB Fig NTC FigSetting the Gas Valve CO2 check Setting the Gas ValveFlue Sampling Point Display Control Knobs Initial Fault Finding Checks Fault FindingError Codes Burner lights Press the Service Reset Error 110 flashingSwitch for 5 seconds Go to section ‘A’X2 connector, is 230V AC across Clean condensate drain systemTerminals 1 Voltage at PCB X2 connector is Spark gap and position Check wiringReplace flame sensing electrode Replace Safety ThermostatShort Parts List 13.0 Short Parts ListPage Page Page GAS Boiler System Commissioning Checklist Date Energy Efficiency Checklist completed? Service RecordSerial Number Date of Installation Warranty & ServiceInstaller Details name, address and contact numbers After Sales Service 0844 871

BBU 15 HE specifications

The Baxi Potterton BBU 15 HE is a high-efficiency boiler designed to offer exceptional performance for both heating and hot water needs in residential settings. Known for its robust build quality and user-friendly features, this model is particularly favored for its versatility and reliability in various home environments.

One of the standout features of the Baxi Potterton BBU 15 HE is its compact size, making it suitable for installation in smaller spaces. Despite its small footprint, it delivers impressive outputs, making it ideal for homes with moderate heating demands. The boiler’s high efficiency rating ensures reduced energy consumption, leading to lower utility bills and a smaller carbon footprint.

Equipped with a powerful heat exchanger, the BBU 15 HE maximizes heat transfer, ensuring that households receive optimum warmth and hot water. With an output capacity of 15 kW, it can effectively heat a variety of living spaces while providing hot water on demand, making it a practical choice for families.

The boiler incorporates a number of advanced technologies that enhance its performance. One such feature is the built-in frost protection, which helps prevent the system from freezing during colder months. Additionally, the BBU 15 HE is designed for easy maintenance, featuring a simple access point for servicing, which can prolong the boiler’s lifespan and improve overall efficiency.

Safety is a top priority in any boiler installation, and the Baxi Potterton BBU 15 HE includes multiple safety features such as a pre-set temperature limit that prevents overheating and a pressure relief valve to manage excessive pressure within the system. These elements contribute to a safer home environment, providing peace of mind for homeowners.

Furthermore, the boiler is designed to operate quietly, minimizing disruptions in the home when heating systems are active. This is an important factor for many households where comfort is a priority.

In summary, the Baxi Potterton BBU 15 HE is a compact, efficient, and reliable boiler that provides an optimal solution for home heating and hot water needs. Its advanced features, safety systems, and user-friendly design make it a popular choice among homeowners, ensuring a cozy and comfortable living environment. Whether for a new installation or a replacement unit, this boiler stands out as a highly effective option in the market.
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