Baxi Potterton Condensing Combination Boiler manual Technical Data, Heatmax Combi 24, 28

Page 10

4.0Technical Data

4.1Heatmax Combi 24, 28 & 33

Appliance Type

 

 

 

C13

C33

C53

 

 

Appliance Category

CAT I 2H

 

 

 

Heat Input CH (Net)

Max

Min

 

 

24 model

 

kW

20.5

7

 

 

28 model

 

kW

24.7

9

 

 

33 model

 

kW

28.9

9.7

 

 

 

 

 

 

 

 

 

 

Heat Input CH (Gross)

Max

Min

 

 

24 model

kW

22.7

7.8

 

 

28 model

kW

27.4

10

 

 

33 model

kW

32.1

10.8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heat Output CH (Non-Condensing)

 

 

 

 

 

 

 

 

 

 

 

 

 

Max

Min

 

 

24 model

 

kW

20

6.8

 

 

28 model

 

kW

24

8.7

 

 

33 model

 

kW

28

9.4

 

 

 

 

 

 

 

 

 

 

 

 

 

Heat Output CH (Condensing)

 

 

 

 

 

 

 

 

 

 

 

 

 

Max

Min

 

 

24 model

 

kW

21

7.4

 

 

28 model

 

kW

25.9

9.5

 

 

33 model

 

kW

30.3

10.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heat Input DHW (Net)

Max

 

 

 

 

24 model

 

kW

24.7

 

 

 

 

28 model

 

kW

28.9

 

 

 

 

33 model

 

kW

34

 

 

 

 

 

 

 

 

 

 

Heat Input DHW (Gross)

Max

 

 

 

24 model

 

kW

27.4

 

 

 

28 model

 

kW

32.1

 

 

 

33 model

 

kW

37.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Heat Output DHW

Max

 

 

 

 

24 model

 

kW

24

 

 

 

 

28 model

 

kW

28

 

 

 

 

33 model

 

kW

33

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Max Gas Rate (Natural Gas - G20)

 

 

 

 

 

 

 

 

 

 

(After 10 mins)

 

 

 

 

 

24 model

 

m3/h

2.6

 

 

 

 

 

28 model

 

m3/h

3.1

 

 

 

 

 

33 model

 

m3/h

3.6

 

 

 

Inlet Pressure (Natural Gas - G20)

mbar

20

 

 

 

 

 

 

 

 

 

Injector (Natural Gas - G20)

 

 

 

7.5mm (24&28 model)

12mm(33 model)

 

 

 

 

 

Electrical Supply

 

230V~ 50Hz

(Appliance must be connected to an

earthed supply)

 

 

 

 

 

 

 

 

 

 

 

Power Consumption

 

 

 

 

155W (24&28 model)

160W(33 model)

 

 

 

 

 

 

 

Electrical Protection

 

 

 

 

 

 

 

IPX5D

 

 

 

 

 

 

 

External Fuse Rating

 

3A

 

 

 

 

 

 

 

Internal Fuse Rating

 

F2L

Condensate Drain

To accept 21.5mm (3/4 in) plastic waste pipe

Flue Terminal

Diameter

 

100mm

Dimensions

Projection

125mm

 

 

 

 

 

Connections

 

 

copper tails

Gas Supply

 

 

-

22mm

Central Heating Flow

 

 

-

22mm

Central Heating Return

-

22mm

Cold Water Mains Inlet

-

15mm

DHW Flow

 

 

-

15mm

Pressure Relief Discharge

-

15mm

 

 

 

 

 

 

Outercase Dimensions

 

 

Casing Height

 

 

 

- 780mm

Overall Height Inc Flue Elbow

 

- 965mm

Casing Width

 

 

 

- 450mm

Casing Depth

 

 

 

- 345mm

 

 

 

 

 

 

 

Clearances

 

 

 

 

Above Casing

200 mm Min

 

Below Casing

150 mm Min*

 

Front

450 mm Min (For Servicing)

Front

5 mm Min (In Operation)

L.H. Side

5 mm Min

 

R.H. Side

5 mm Min

 

*This is MINIMUM recommended dimension. Greater clearance will aid installation and maintenance.

Weights (kg)

 

 

 

(24/28)

(33)

Packaged Boiler Carton

48.6

51

Installation Lift Weight

43.6

46

NOx Class

 

5

 

 

Central Heating Primary Circuit

 

Pressures

 

 

 

 

 

 

 

 

 

bar

Safety Discharge

 

 

 

3

Max Operating

 

 

 

2.5

Min Operating

 

 

 

0.5

Recommended Operating Range

1-2

 

 

 

 

 

 

DHW Circuit

 

bar

 

Pressures

 

 

 

 

Max Operating

 

8

 

 

Min Operating

 

0.15

 

 

 

 

 

 

 

Flow Rates

(24)

(28)

(33)

 

 

l/min

l/min

l/min

DHW Flow Rate

 

 

 

 

@ 30o C Rise

11.43

13.3

15.7

DHW Flow Rate

 

 

 

 

@ 35o C Rise

9.8

11.5

13.5

Min Working

 

 

 

 

DHW Flow Rate

2

2

 

2

IMPORTANT: Where Low Flow Taps or Fittings are intended to be used in the DHW system connected it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5l/min. This will ensure reliable operation of the DHW function.

Pump

 

 

 

Available Head

See graph below

 

 

 

Expansion Vessel

- (For Central Heating

only. Integral with appliance)

 

 

 

 

bar

 

Min Pre-charge Pressure

0.5

 

 

 

(24,28)

(33)

Max Capacity of

 

litre

litre

CH System

 

125

155

Primary Water Content

 

 

of Boiler (unpressurised)

2.5

2.8

Temperatures

C.H. Flow Temp (adjustable)

25°C to 80°C max (± 5°C)

D.H.W. Flow Temp (adjustable)

35°C to 60°C max (± 5°C) dependent upon flow rate

SEDBUK Declaration

SAP 2005 Seasonal Efficiency for all

models is 91.1%

This value is used in the UK Government’s Standard Assessment Procedure (SAP) for energy rating of dwellings. The test data from which it has been calculated has been certified by 0087.

NOTE: All data in this section are nominal values and subject to normal production tolerances.

Pump - Available Head

 

5.5

 

5

 

4.5

 

4

 

3.5

 

3

(wg)

2.5

 

Metre

2

1.5

 

 

1

0.5

0

0

200

400

600

800

1000

1200

10© Baxi Heating UK Ltd 2012

Flow Rate (l/h)

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Contents Installation & Service Instructions 0086 Installer Notification Guidelines Scheme Members onlyLegislation Important Installation, Commissioning, Service & RepairCodes of Practice refer to the most recent version Preparation Safe Manual HandlingGeneral TechniqueContents Description Contents of PackIntroduction Optional ExtrasGeneral Layout LayoutFrost Protection Mode Central Heating Mode FigDomestic Hot Water Mode Fig Appliance OperationTechnical Data Heatmax Combi 24, 28Dimensions and Fixings Central Heating Circuit System DetailsInformation BypassSystem Filling and Pressurising Safety Pressure Relief Valve FigExpansion Vessel Central Heating only Showers Domestic Hot Water Circuit FigHard Water Areas Location Site RequirementsClearances Figs Gas Supply Site RequirementVentilation of Compartments Electrical SupplyCondensate Drain 50mm per 500mm minRun Minimum fallBelow windows or openings on pitched roofs 2000 Plume Displacement KitFlue Likely flue positions requiring a flue terminal guardHorizontal Flue Systems Flue OptionsHorizontal Flues This bend is equivalent to 1 metreRoof Terminal This bend is equivalent to 1 metre Vertical FluesVertical Flue Systems Metre for each 91.5 bend Metre for each 135 bendFlue Accessories Key Accessory Size Code NoFlue Trim Flue DimensionsFor Roof Terminals Terminal Guard FigPlume Displacement Plume Displacement Kit FigExample 28/33Determining Permissible Lengths 5121368General Fitting Notes 30mmUsing a suitable bit e.g mm, drill through Elbow to allow the flue to be installed as shown60Ø extension piece. It must be secured using two Extension and outlet. Secure using two of the screwsFlushing InstallationUnpacking & Initial Preparation After considering the site requirementsFitting The Boiler Condensate Drain see sectionEnsure Elbow is fully engaged into Boiler Adaptor Fitting The FlueWall Thickness Flue Elbow WasteY Flue25mm Extension Cut End Inner Flue Support BracketEnsure Extension is fully engaged into Boiler Adaptor Preliminary Electrical Checks Making The Electrical ConnectionsTerminal Block Cover Cable Clamp Commissioning Commissioning the BoilerCheck the Operational Working Gas Inlet Pressure Selector Switch DisplayGas Valve Completion CompletionCase Front Panel Facia Panel Annual Servicing ServicingAnnual Servicing Inspection Electrode Leads Venturi Injector Fan, Collector and Cover Assembly Threaded BushRestricter Filter Hall Effect Sensor Igniter Fig Changing ComponentsSpark and Sensing Electrodes Fig Injector Fig Fan FigVenturi Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorBurner Fig Insulation FigDHW Temperature Sensor NTC Fig Central Heating Temperature Sensor NTC FigSafety Thermostat Fig Flue/Heat Exchanger Thermostat Sensor FigPump Complete Fig Pump Head Only FigAutomatic Air Vent Fig Pressure Gauge Figs Hall Effect Sensor FigDiverter Valve Motor Unit & Assembly Fig Plate Heat Exchanger FigSelector Switch Fig 14.22 P.C.B. FigGas Valve Fig Expansion Vessel FigSetting the Gas Valve Setting the Gas Valve CO2 checkIllustrated Wiring Diagram Electrical306 Short Parts ListShort Parts List 302Initial Fault Finding Checks Fault FindingError Codes Reset position for 5 seconds Error 133 flashingGo to section ‘A’ Turn the selector switch to Pump runsOpen DHW tap fully Error 133 flashing Go to section ‘I’Turn Domestic Hot Water Close DHW tapFan jammed or faulty winding Replace PCB PCB X3 connector terminals 3Switch terminal Replace waterReplace gas valve Replace sensor or PCB E28Gas at burner Terminals 1Replace PCB Is there 230V at Replace safety thermostatReplace sensor Page GAS Boiler System Commissioning Checklist Service Record Brooks House, Coventry Road, Warwick. CV34 4LL

Condensing Combination Boiler specifications

The Baxi Potterton Condensing Combination Boiler is a sophisticated heating solution designed to meet the demands of modern households while promoting energy efficiency. This state-of-the-art boiler combines both heating and hot water capabilities into a compact unit, making it an ideal choice for homes with limited space.

One of the standout features of the Baxi Potterton Condensing Combination Boiler is its impressive energy efficiency. With a high energy efficiency rating, these boilers can significantly reduce energy bills and minimize carbon footprints. The condensing technology maximizes heat recovery, allowing the boiler to utilize heat that would otherwise be lost in traditional systems. By extracting more energy from the combustion process, homeowners can enjoy reliable heating and hot water without the typical energy waste associated with older boilers.

The Baxi Potterton range is engineered for easy installation and maintenance, featuring a lightweight design that simplifies the fitting process. The built-in digital control system allows homeowners to easily adjust settings for optimal comfort and energy usage. Additionally, the boiler includes a frost protection feature, making it a reliable option for homes in colder climates.

Another key characteristic of the Baxi Potterton Condensing Combination Boiler is its powerful hot water delivery system. The combination boiler provides instant hot water on demand, eliminating the need for a separate water tank. This ensures that households have a constant supply of hot water for showers, cooking, and other domestic needs, without long wait times.

Safety is a top priority with the Baxi Potterton. The boiler is equipped with multiple safety features, including pressure relief valves and safety cut-off systems, ensuring peace of mind for homeowners. The compact design further includes a quiet operation feature, which is particularly beneficial for households where noise levels need to be kept to a minimum.

In summary, the Baxi Potterton Condensing Combination Boiler is a highly efficient, compact, and user-friendly solution for home heating and hot water needs. With its advanced technology and strong emphasis on safety, it stands out as a reliable choice for modern households looking to improve energy efficiency while maintaining comfort. Whether you are replacing an old boiler or installing a new system, the Baxi Potterton offers a perfect blend of practicality and innovation.
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