Baxi Potterton BBU 15 HE manual PCB Fig, NTC Fig, Safety Thermostat Fig, Float Switches Fig

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Flow Pipe

Fig. 52

Clip

NTC

Control Knobs

Discharge

Float Switch

Safety Thermostat

Fig. 53

PCB

Fig. 54

 

Safety Float

Alignment

Switch

Bracket

Fig. 55

 

10.0Changing Components

10.9PCB (Fig. 54)

1.Pull off the two control knobs and disengage the securing tabs of the cover. Undo the screws securing the PCB.

2.Draw the PCB forwards and disconnect the wiring. Transfer the two potentiometer drive pins to the new PCB and replace in reverse order of dismantling.

3.Ensure that the wiring connectors are pushed fully on to the PCB terminals.

10.10NTC (Fig. 53)

1.Disconnect the 2 pin plug. Remove the clip retaining the NTC in the heat exchanger pocket. Pull the NTC out of the pocket.

2.Apply suitable heat transfer paste to the new NTC. Replace in reverse order of dismantling, using the clip previously removed. Ensure that the plug is fully engaged.

10.11Safety Thermostat (Fig. 52)

1.Disconnect the two leads from the thermostat.

2.Remove the screws securing the thermostat to the mounting plate on the flow pipe.

3.Replace in reverse order. The thermostat is not polarised - either wire can fit either terminal on the thermostat.

10.12Float Switches (Fig. 55)

1.Remove the fan as described in Section 10.5, paragraphs 1 to 5.

2.The two float switches are the same, but oriented differently. The discharge switch is at the left, the safety at the right.

3.To remove either switch disconnect the lead and pull off the alignment bracket.

4.Undo the retaining nut. The sealing grommet will be released from the sump body and allow the switch to be removed.

5.Note the orientation of the alignment rib on the switch. It is positioned uppermost on the safety float switch and to the bottom on the discharge switch.

6.Take the new switch assembly and insert it into the sump. Hand tighten the nut and slide the alignment bracket in place to ensure the switch is in position. Tighten the nut a further 2 turns.

7.Reconnect the lead to the switch, ensuring it is fully engaged.

32© Baxi Heating UK Ltd 2009

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Contents Baxi Bermuda BBU 15 HE 0086 Installer Notification Guidelines Scheme Members onlyCodes of Practice, most recent version should be used Important Installation, Commissioning, Service & RepairLegislation Safe Manual Handling Contents Description ContentsIntroduction General Layout Layout FigFlue Kit 10m & 12.5m a Technical Data Bermuda HE Cbbu 15 HESystem Details Water Circulating SystemsTreatment of Water Circulating Systems There is a drain cock supplied in the plumbing kitStorage Systems PipeworkSystem Controls Sealed Systems Figs , 7 Sealed Systems Site Requirements Builders Opening FigLocation Fireplace Opening & SurroundFlue No Horizontal Runs are PermittedVentilation Gas Supply FigElectrical Supply Fig Electrical Connection Gas ConnectionCondensate Drain General Condensate Disposal FigTotal volume of the sump is 1.5 litres Condensate DisposalCondensate Pump Operation From Boiler 500mm MinBoiler Internal Wiring Boiler Internal Illustrated Wiring DiagramFlue System InstallationInitial Preparation Barb ‘C’ Clip Air Cowl Air Duct Collar Ribs Terminal Cap Siting the Boiler Water ConnectionsGas Connection Electrical ConnectionCommissioning the Boiler Completion & CommissioningCompletion Test Point Annual Servicing Annual ServicingAnnual Servicing Inspection Electrode Assembly Fig Changing ComponentsChanging Components Spark Generator FigFan Fig Burner FigSpark Generator Plug Electrode Fan Injector Burner Spark Generator Plug Gas Feed Pipe InjectorInjector Gas Valve Earth Wire Gas Valve FigSafety Thermostat Fig Float Switches FigPCB Fig NTC FigFlue Sampling Point Display Control Knobs Setting the Gas ValveSetting the Gas Valve CO2 check Error Codes Fault FindingInitial Fault Finding Checks Error 110 flashing Burner lights Press the Service ResetSwitch for 5 seconds Go to section ‘A’Clean condensate drain system X2 connector, is 230V AC acrossTerminals 1 Voltage at PCB X2 connector is Spark gap and position Check wiringReplace Safety Thermostat Replace flame sensing electrode13.0 Short Parts List Short Parts ListPage Page Page GAS Boiler System Commissioning Checklist Service Record Date Energy Efficiency Checklist completed?Warranty & Service Serial Number Date of InstallationInstaller 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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