Baxi Potterton Gold FSB 30 HE manual Determining Permissible Lengths P.D.K

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9.0Plume Displacement

9.2Determining Permissible Lengths - P.D.K.

(metres)

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Example 1

 

 

Concentric 70/110 Flue (metres)

Flue Lengths - Not Permissible

(metres)

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Example 2

 

 

Concentric 70/110 Flue (metres)

Flue Lengths - OK

In the graph the solid line diagonal represents the relationship between the concentric flue assembly (and any extensions) and the 70Ø exhaust (and any extensions or additional bends).

Example 1 - Not Permissible

If, for instance, a concentric length of 3.25 metres was required and the 70Ø exhaust needed to be 10 metres the graph shows that this combination would NOT be permissible as the intersection point would be above the solid diagonal line.

 

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Exhaust

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70Ø

 

 

 

 

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Concentric 70/110 Flue (metres)

Example 3

Flue Lengths - OK

Support

Bracket

70Ø Exhaust

45° Elbow

 

X

Y

93° Elbow

 

1 metre Extension

1 metre supplied in kit

Concentric 70/110 Flue

 

(MUST be installed

Concentric Flue

horizontally)

Additional Accessories

 

 

A - 93° Elbow

5117381

 

B - 45° Elbow (Pair)

5117382

 

C - 1 metre 60Ø Extension

5117380

 

Fig. D

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 2 metres of concentric flue and 4 metres of 70Ø 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 2 metres long. Find the position of ‘2’ 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 14 metres. Therefore, the total equivalent length of the 70Ø exhaust can be up to 14 metres. Any elbow equivalencies must be accounted for i.e. 93° elbows are equal to 1 metre, each 45° elbow to 0.5 metres.

Flue Length - Worked Example

In Fig. D opposite an additional 93° elbow and pair of 45° elbows have been included in the 70Ø exhaust.

Also 3 straight extension pieces have been used.

To calculate total length:-

 

Length of 70Ø supplied in kit =

1 metre

3 x 1 metre Extensions =

3 metres

1 x 93° Elbow =

1 metre

2 x 45° Elbow =

1 metre (0.5 metres each)

Total 70Ø =

6 metres

After consulting the table in Example 3 it can be determined that the concentric flue could be up to approximately 3.25 metres long.

26© Baxi Heating UK Ltd 2011

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Contents
FSB 30 HE Natural Gas Potterton Gold FSB 30 HE No 592Installer Notification Guidelines Scheme Members onlyLegislation Important Installation, Commissioning, Service & RepairGas Safety Installation & Use Regulations Codes of Practice, most recent version should be usedContents Important Information IntroductionDescription General Layout Flow Temperature Thermistor RedPosition of Optional Integral Timer Wiring Layout Figs , 4, 5All TRVs Shut Down ? Minute Anti-cycle Boiler OperationBoiler Operation Ipxx Technical DataCAT I 2H Dimensions and Fixings Treatment of Water Circulating Systems System DetailsWater Circulating Systems Air Vents Low Head InstallationPipework System Controls & Wiring Sealed Systems Fig Compartment Site RequirementsLocation Electrical Supply Clearances Figs &16Gas Supply 5mm Min 500mm Min For Servicing Purposes 390mmCondensate Drain General Condensate Disposal± 10 from vertical Site RequirementSink Blockage or restriction of the pipe into the drainFlue MINHorizontal Flue Systems Flue OptionsHorizontal Flue System Examples This bend is equivalent to 0.5 metreTotal equivalent length Vertical Flue System Examples Twin PipeTwin & Vertical Flue Systems 17.2 + 34.4 = 51.6 metresFlue Group B Flue AccessoriesCDS Flue Group PFor Twin Flues For Vertical Flues For Vertical Flue SystemsFor Twin Flue Systems Terminal Guard Fig Flue DimensionsFor Roof Terminals Flue Deflector aPlume Displacement Plume Displacement Kit P.D.KDetermining Permissible Lengths P.D.K This section of the flue Must be horizontal General Fitting Notes P.D.KMin metres Min .3 metres Fig. H Installation Fitting the Standard Flue Flue Inner Flue Support BracketInner Flue Support Bracket Flue Elbow Gasket Flue Trim PointsMaking the Condensate Drain ConnectionIntegral Programmer Making The Electrical ConnectionsCable Clamp Way Terminal Block Green/Yellow Schematic Wiring DiagramElectrical Fuse 3.15 ATIllustrated Wiring Diagram PCBPriming the Condensate Pump Commissioning the BoilerCommissioning the Boiler Check the Operational Working Gas Inlet Pressure Fitting The Case Panels & Facia 13.2 ‘Benchmark’ ChecklistCompletion HandoverServicing the Boiler Annual ServicingEarth Combustion Box Door Panel Annual Servicing InspectionAir Box Door Panel Spark Sleeve InsulationLock Nut Service Drain Plug Central Insulation Panel Pipe may be removed to increase accessCracks/damage. Clean with a soft brush To it FigChanging Components & Preparation Flow Temperature Thermistor and Safety Thermostat FigChanging Components Drain the boiler see .1 paragraph 2 Condensate Pump Complete aClip Check operation of the pump See SectionChanging Components Spark and Sensing Electrodes Fig Condensate Trap Fig Injector Pipe FigGas Valve Fig Securing Nut Sensor Leads Condensate Trap Lock NutCombustion Box Door Panel Burner Support Bracket Heat Exchanger Manifold AssemblyHeat Exchanger Burner Securing Screws Key Description Short Parts ListShort Parts List Fault Finding 240V at C ? 240V at a ?240V at B ? 240V at D ?System full of water ? Wires from inline Connector to PCB faultyViewed from Wire Entry end Replace Flow Switch Pump running ?Replace PCB Way Connector Lead from PCB to Gas Valve faulty Wiring from PCBRectify wiring Is there Gas at gas valve inlet ?Lights On Off Replace Stat Replace fan Lights Rectify wiring Viewed from Wire Entry end YES ‘C’ ‘D’ ‘B’‘A’ Condensing Boilers only Service Record Potterton Brooks House, Coventry Road, Warwick. CV34 4LL Comp No 6/11