Baxi Potterton 30 HE manual Plate Heat Exchanger Fig

Page 44

Plate Heat Exchanger

Rubber Seal

Fig. 81

Sensing Pipes

Microswitch

Bracket

Fig. 82

Diaphragm

Spring

Fig. 83

Diverter Manifold

Grub Screws

DHW Pressure

Differential Valve

Diaphragm

Plastic Disc

Pushrod

14.0Changing Components

14.21Plate Heat Exchanger (Fig. 67)

1.Drain the primary circuit.

2.While supporting the heat exchanger undo the screws securing it to the brass manifolds.

3.Withdraw the heat exchanger upwards and to the left of the gas valve, taking care not to damage any wires or controls.

Seals

4.There are four rubber seals between the manifolds and heat exchanger which may need replacement.

5.Ease the seals out of the manifold. Replace carefully, ensuring that the seal is inserted into the manifold parallel and pushed fully in.

6.When fitting the new heat exchanger note that the left hand location stud is offset towards the centre more than the right hand one.

7.Reassemble in reverse order.

14.22Diverter Valve Assembly (Figs. 82 & 83)

The diverter valve assembly comprises of a central heating pressure differential valve and a domestic hot water pressure differential valve. These are connected to a manifold which is joined to the plate heat exchanger.

DHW Pressure Differential Valve (Fig. 83)

1.Drain the primary circuit.

2.Undo the screw securing the microswitch bracket to the valve (Fig. 82).

3.Disconnect the two sensing pipes and slacken the grub screws securing the valve to the diverter manifold.

4.Draw the valve away from the diverter manifold. The valve may now be replaced or split to examine the diaphragm.

5.To examine the diaphragm hold the valve body securely and carefully remove the six screws. The diaphragm spring will force apart the two halves of the valve.

6.Remove the plastic disc and pushrod assembly. Carefully examine the diaphragm and replace it if there is any damage.

7.Reassemble in reverse order.

44© Baxi Heating UK Ltd 2007

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Contents Installation & Service Instructions Contents Installer Notification Guidelines Scheme Members onlyCodes of Practice, most recent version should be used Important Installation, Commissioning, Service & RepairLegislation Safe Manual Handling GeneralPreparation TechniqueIntroduction DescriptionOptional Extras Case Front Panel Control Box Data Badge1211 30 31 32 General LayoutLayout Central Heating Mode Fig Domestic Hot Water Mode FigFrost Protection Mode Appliance OperationTechnical Data Performa 30 HEDimensions and Fixings System Details InformationCentral Heating Circuit BypassSystem Filling and Pressurising Pressure Relief Valve FigHard Water Areas Domestic Hot Water Circuit FigShowers Clearances Figs Site RequirementsLocation Electrical Supply Ventilation of CompartmentsGas Supply External termination via internal Condensate DrainPlume Displacement Kit FlueBuilt-in element such as a window frame. See BS 5440 Pt Or DoorFlue Options Horizontal FluesHorizontal Flue Systems This bend is equivalent to 1 metreVertical Flues Twin Pipe Twin & Vertical Flue SystemsMetre for each 91.5 elbow Metre for each 45 elbow 1m extension 45bend 25m 91.5bend5111079 Flue AccessoriesKey Accessory Size For Twin Flue Systems fit the adaptors as follows Flue Duct AdaptorAir duct adaptor Flue Dimensions For Roof TerminalsFlue Trim Terminal Guard FigPlume Displacement Plume Displacement Kit bElbow/Plume Outlet Assembly Ring Bracket Metres 60Ø Exhaust Flue Pipe 60Ø SupportDetermining Permissible Lengths 30mm General Fitting NotesMin metres Flue Trim Spigot ScrewPlume Outlet Elbow Installation Initial PreparationFlushing Preparing The BoilerFitting The Boiler Condensate Drain see sectionPressure Relief Valve Discharge Pipe Wall Plate Remove the sealing caps from the boiler connectionsFitting The Flue Wall Thickness Flue Elbow AdaptorWasteY Flue Inner Flue Support Bracket Flue Elbow Vertical FlueMaking The Electrical Connections Preliminary Electrical ChecksCommissioning the Boiler Commissioning the BoilerChecking the Burner Pressure Pressure Test Point Sealing ScrewCase Front Panel Facia Panel CompletionCompletion Servicing the Boiler 13 .1 Annual ServicingAnnual Servicing Fan Figs Pressure Switch FigChanging Components Burner Fig 14.0 Changing ComponentsHeat Exchanger Fig Injectors Fig Electrodes FigInsulation Fig Reassemble in reverse orderCentral Heating Temperature Sensor Fig Safety Thermostat FigDHW Temperature Sensor Fig Gas Valve FigAutomatic Air Vent Fig Pump Head Only FigPump Complete Fig Condensate Trap Fig Pressure Gauge FigsExpansion Vessel Fig Selector Switch Fig 14.19 P.C.B. FigPlate Heat Exchanger Fig Diverter Valve Assembly Flow Regulator FigsSecondary Heat Exchanger Fig Flue Overheat Thermostat FigIllustrated Wiring Diagram Control PCBFault Finding Microswitch terminals Diverter valve spindle Assembly faultyDomestic Hot Water Follow operational sequence Turn selector to neon illuminatedCheck wiring PCB A4 connector Replace selector Terminals 4 Replace pump PCB A4 connector terminals 3 Replace PCBPCB A2 connector, is Across terminals 5 Replace microswitchPCB A1 connector has 230V AC Turn selector switchTo ‘Reset’ position Gas at burnerON/OFF/RESET selector when turned to ‘Reset’ position Short Parts List Short Parts List131 154GAS Boiler Commissioning Checklist Service Interval Record Potterton
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30 HE specifications

The Baxi Potterton 30 HE is a popular choice among homeowners seeking an efficient and reliable boiler solution. Recognized for its compact design and advanced technologies, this boiler is ideal for various residential heating needs.

One of the standout features of the Baxi Potterton 30 HE is its high efficiency rating, which ensures lower energy consumption and reduced utility bills. With an impressive efficiency of up to 90%, this boiler operates at a much higher capacity compared to older models, making it both environmentally friendly and cost-effective. The 30 HE is particularly well-suited for medium to larger homes with a higher demand for hot water.

The Baxi Potterton 30 HE incorporates a range of innovative technologies aimed at enhancing performance and reliability. The automatic modulation function adjusts the boiler's output according to demand, ensuring that it only works as hard as necessary. This not only prolongs the lifespan of the unit but also maximizes comfort levels in the home.

Another feature of the 30 HE is its low noise operation. This boiler has been specifically designed to minimize sound, allowing it to operate quietly in the background without disturbing daily activities. This makes it an ideal choice for homes where noise can be a concern, particularly in open-plan living spaces.

The compact dimensions of the Baxi Potterton 30 HE make it easy to install in various locations, whether it be in a kitchen, utility room, or even a loft space. Its lightweight construction further simplifies the installation process, saving both time and labor costs.

In terms of user-friendliness, the boiler is equipped with an intuitive control panel that allows homeowners to easily adjust settings and monitor performance. This user-centric design ensures that even those who may not be technically inclined can manage their heating requirements with ease.

Safety features are also a priority in the design of the Baxi Potterton 30 HE. It includes built-in safety mechanisms such as frost protection and a burner pressure monitoring system, which work to prevent overheating and ensure optimal operation.

Overall, the Baxi Potterton 30 HE is an efficient, reliable, and user-friendly boiler that meets the heating demands of modern homes. Its blend of advanced technologies, compact size, and focus on safety make it a standout choice for homeowners seeking a high-performance heating solution.
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