Baxi Potterton 30 HE manual Determining Permissible Lengths

Page 24

 

2

 

 

 

 

2

 

 

(metres)

 

30HE

 

 

(metres)

30HE

 

 

 

 

 

 

 

 

 

ExhaustØ60

1

 

 

 

ExhaustØ60

1

 

 

 

0

 

 

 

 

0

 

 

 

0

 

1

2

 

0

1

2

 

 

Concentric 60/100 Flue (metres)

 

 

Concentric 60/100 Flue (metres)

 

Example 1

 

 

 

Example 2

 

 

 

Flue Lengths - Not Permissible

 

Flue Lengths - OK

 

 

 

 

 

2

 

 

 

 

 

 

 

(metres)

 

30HE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ExhaustØ60

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

0

 

1

 

 

2

 

 

 

 

Concentric 60/100 Flue (metres)

 

 

Example 3

Flue Lengths - OK

60Ø Exhaust

X

 

 

Y

93° Elbow

Support

Bracket

 

 

 

Extension

Concentric 60/100 Flue

 

 

 

 

Concentric Flue

Fig. 17

 

 

Additional Accessories

 

 

A - 93° Elbow

5117381

 

B - 45° Elbow (Pair)

5117382

Fig. 18

C - 1 metre 60Ø Extension

5117380

 

 

 

 

9.0Plume Displacement

9.2Determining Permissible Lengths

In the graph the solid line diagonal represents the relationship between the concentric flue assembly (and any extensions) and the 60Ø exhaust (and any extensions or additional bends).

Example 1 - Not Permissible

If, for instance, a concentric length of 1.25 metres was required and the 60Ø exhaust needed to be 1 metres the graph shows that this combination would NOT be permissible as the intersection point would be above the solid diagonal line.

Example 2 - Flue Lengths OK

Where both lengths have been determined they can be applied to the graph to check that the installation is permissible. For example, if it was known that 0.5 metres of concentric flue and 1 metre of 60Ø exhaust were required, the values could be applied to the graph as shown in Example 2.. As the point of intersection of the dotted lines is below the solid diagonal line, the combination of lengths is shown to be acceptable.

Example 3 - Flue Lengths OK

In the example shown, assume that the concentric part of the flue needs to be 1 metres long. Find the position of ‘1’ on the horizontal axis of the graph and then project upwards to the solid diagonal line. This is represented by the vertical thick dotted line. Where this dotted line intersects with the solid diagonal line on the graph, project across to the vertical axis. As can be seen this corresponds with 1 metres. Therefore, the total equivalent length of the 60Ø exhaust can be up to 1 metres. Any bend equivalencies must be accounted for i.e. 93° bends are equal to 1 metre, each 45° bend to 0.5 metres.

Flue Length - Worked Example

Potterton Performa 30 HE

In Fig. 18 opposite an additional 93° bend has been included in the 60Ø exhaust. with 2 x 1metre extensions which have been cut to 0.25metres and fitted. The waste is discarded.

To calculate total length:-

 

2 x 0.25 metre Lengths =

0.5 metres

1 x 93° Elbow =

1 metre

Total 60Ø Exhaust =

1.5 metres

After consulting the table in Example 3 it can be determined that the concentric flue could be up to approximately 0.5 metres long.

24© Baxi Heating UK Ltd 2007

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Contents Installation & Service Instructions Contents Installer Notification Guidelines Scheme Members onlyImportant Installation, Commissioning, Service & Repair LegislationCodes of Practice, most recent version should be used Safe Manual Handling GeneralPreparation TechniqueIntroduction DescriptionOptional Extras Case Front Panel Control Box Data BadgeGeneral Layout Layout1211 30 31 32 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 FigDomestic Hot Water Circuit Fig ShowersHard Water Areas Site Requirements LocationClearances Figs Ventilation of Compartments Gas SupplyElectrical 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 91.5bendFlue Accessories Key Accessory Size5111079 Flue Duct Adaptor Air duct adaptorFor Twin Flue Systems fit the adaptors as follows 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 ScrewCompletion CompletionCase Front Panel Facia Panel Servicing the Boiler 13 .1 Annual ServicingAnnual Servicing Pressure Switch Fig Changing ComponentsFan Figs 14.0 Changing Components Heat Exchanger FigBurner Fig Injectors Fig Electrodes FigInsulation Fig Reassemble in reverse orderCentral Heating Temperature Sensor Fig Safety Thermostat FigDHW Temperature Sensor Fig Gas Valve FigPump Head Only Fig Pump Complete FigAutomatic Air Vent Fig Pressure Gauge Figs Expansion Vessel FigCondensate Trap 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

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