Baxi Potterton 47-393-39 Appliance Operation, Central Heating Mode Fig, Frost Protection Mode

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Central Heating Circuit

26

25

18 24 22

21

16

Fig. 2

1

27

 

 

2

 

3

4

 

 

7

20

5

6

 

 

 

8

 

 

9

 

23

11

 

 

 

 

10

 

 

17

15 14 13 12

3.0Appliance Operation

3.1Central Heating Mode (Fig. 2)

1.With a demand for heating, the pump circulates water through the primary circuit.

2.Once main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor.

3.When the flow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights automatically (anti-cycling). The pump continues to run during this period.

4.When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump Overrun).

3.2Domestic Hot Water Mode (Fig. 3)

1.

Priority is given to the domestic hot water supply. A

demand at a tap or shower will override any central heating

requirement.

2.

The flow of water will operate the Hall Effect Sensor

which requests the 3 way valve to change position. This will

Key

1

Primary Heat Exchanger

15 Domestic Hot Water Outlet

2

Burner

16

Heating Flow

3

Ignition Electrodes

17

Pressure Gauge

4

Flame Sensing Electrode

18

Water Pressure Sensor

5

Gas Valve

20

Fan

6

Pump

21

Diverter Valve Assembly

7

Automatic Air Vent

22

Diverter Valve Motor

8

Plate Heat Exchanger/Automatic By-pass

23 Domestic Hot Water Flow Temperature Sensor

9

Flow Sensor with Filter & Regulator

24

Safety Thermostat

10

Pressure Relief Valve

25 Central Heating Temperature Sensor

11

Boiler Drain Point

26

Expansion Vessel

12

Heating Return

27 Heat Exchanger Air Vent

13

Cold Water Inlet On/Off Valve and Filter

 

 

14

Gas Inlet

 

 

allow the pump to circulate the primary water through the

DHW plate heat exchanger.

3. The burner will light automatically and the temperature of

the domestic hot water is controlled by the temperature

sensor.

4. When the domestic hot water demand ceases the burner

will extinguish and the diverter valve will remain in the

domestic hot water mode, unless there is a demand for

central heating.

IMPORTANT: When the selector switch is in the ‘0’ (Off) position the electrical supply to the boiler is isolated. The boiler will not operate and the integral timer will

Domestic Hot Water Circuit

27

 

 

26

3

4

 

 

 

 

 

 

20

5

 

 

 

 

 

 

 

25

 

 

18

 

24

 

 

 

 

 

 

 

 

22

 

9

 

 

 

 

 

21

 

23

 

 

 

 

 

1

2

7

6

8

11

10

17

require resetting once the selector switch is set to either Position (i) or Position (ii).

3.3Frost Protection Mode

1.The frost protection mode is integral to the appliance and functions only with the selector switch (see Section 2.1) in the domestic hot water and central heating position. If the system temperature falls below 5° C then the boiler will fire on its minimum setting until a flow temperature of 30° C is reached. Further protection can be incorporated by using a system frost thermostat.

3.4Pump Protection

1.With the selector switch (see Section 2.1) in either the central heating or central heating and domestic hot water position, the pump will automatically operate for 1 minute in every 24 hours to prevent sticking.

16

15

14

13

12

Fig. 3

© Baxi Heating UK Ltd 2012

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Contents Installation & Service Instructions Potterton Titanium Natural GasScheme Members only Installer Notification GuidelinesImportant Installation, Commissioning, Service & Repair LegislationCodes of Practice refer to the most recent version General Safe Manual HandlingPreparation TechniqueContents Contents of Pack IntroductionDescription General Layout Domestic Hot Water Mode Light DisplayLayout Expansion Vessel Automatic Air VentDomestic Hot Water Mode Fig Central Heating Mode FigFrost Protection Mode Appliance OperationTitanium 24, 28, 33 Technical DataOrientation Dimensions and FixingsTap Rail 32.5 mm Condensate Drain 65 mm 22mm 15mmInformation System DetailsCentral Heating Circuit BypassSystem Filling and Pressurising Fig Expansion Vessel Central Heating onlyPressure Relief Valve Fig Domestic Hot Water Circuit Fig ShowersHard Water Areas Site Requirements LocationAt Least 1.5 7.2 Clearances Figs Ventilation of Compartments Site RequirementGas Supply Electrical SupplyCondensate Drain 500mm min 50mm perMinimum fall RunBoiler External runs & those InsulationFlue Flue Options Each fitting to aid assemblyHorizontal Flue Systems Horizontal FluesTwin & Vertical Flue Systems Vertical Flues120mm Min ApartFlue Accessories Key Accessory Size Code NoTelescopic Internal Flue Kit Twin Flue Duct Adaptor Twin Flue ConnectionAir Duct Connection Flue Duct Connection Boiler Adaptor For Roof Terminals Flue DimensionsFlue Trim Terminal Guard FigPlume Displacement Kit Fig Plume DisplacementElbow/Plume Outlet Assembly Ring BracketDetermining Permissible Lengths 28/33/40Example Example Flue Lengths OK30mm General Fitting Notes60Ø extension piece. It must be secured using two Elbow to allow the flue to be installed as shownUsing a suitable bit e.g mm, drill through Extension and outlet. Secure using two of the screwsUnpacking & Initial Preparation InstallationFlushing After considering the site requirementsFitting the Filling Loop Kit Fitting The Boiler Fitting the Pressure Relief Discharge Pipe FigCondensate Drain see section Wall Thickness Flue Elbow Fitting The FlueEnsure Elbow is fully engaged into Boiler Adaptor Wall Thickness Waste FlueInner Flue Support Bracket 25mm Extension Cut EndEnsure Extension is fully engaged into Boiler Adaptor Preliminary Electrical Checks Making The Electrical ConnectionsCommissioning Selector Switch DisplayCommissioning the Boiler Screw Pump Automatic Air VentPressure Setting the Timer Completion CompletionCase Front Panel Facia Panel Servicing 13 .1 Annual ServicingAnnual Servicing Inspection 10 ±1 Burner Sensing ElectrodeViewing Window Changing Components Igniter FigSpark and Sensing Electrodes Fig Venturi Fig Fan FigInjector Fig Gasket Venturi Injector Cover Gas Inlet Pipe Fan CollectorBurner Fig Insulation FigBurner Gasket Extension Piece Safety Thermostat Fig Central Heating Temperature Sensor NTC FigDHW Temperature Sensor NTC Fig Flue/Heat Exchanger Thermostat Sensor FigPump Head Only Fig Pump Complete FigAutomatic Air Vent Fig Hall Effect Sensor Fig Pressure Gauge FigsPlate Heat Exchanger Fig Diverter Valve Motor Unit & Assembly Fig14.22 P.C.B. Fig Selector Switch FigThrottle Adjustment Screw Gas Valve FigExpansion Vessel Fig Setting the Gas Valve CO2 check Setting the Gas ValveFlue Adaptor Test Point Plug Analyser Probe ThrottleElectrical Illustrated Wiring DiagramShort Parts List Short Parts List306 302Fault Finding Initial Fault Finding ChecksError Codes Go to section ‘A’ Turn the selector switch to Error 133 flashingReset position for 5 seconds Pump runsError 133 flashing Go to section ‘I’ Turn selector switch toTurn Domestic Hot Water Open DHW tap fullySwitch terminal PCB X3 connector terminals 3Fan jammed or faulty winding Replace PCB Replace waterReplace sensor or PCB E28 Check wiring Viewing WindowGas at burner Replace gas valveReplace safety thermostat Replace PCB Is there 230V atReplace sensor Page Page GAS Boiler System Commissioning Checklist Service Record Potterton

47-393-40, 47-393-41, 47-393-39, 47-393-42 specifications

The Baxi Potterton 47-393-42, 47-393-39, 47-393-41, and 47-393-40 are models of high-efficiency gas boilers designed for residential heating. These models are well-known for their reliability, advanced technology, and user-friendly features, making them a popular choice among homeowners looking to improve their heating systems.

One of the standout features of these models is their energy efficiency. Each unit is engineered to comply with stringent energy-saving regulations, significantly reducing utility bills while maintaining optimal heating performance. They are rated with impressive efficiency ratings, which can lead to long-term savings and a reduced carbon footprint.

The Baxi Potterton range employs a heat exchanger system designed to maximize heat transfer and minimize energy waste. This sophisticated technology ensures that the boiler operates at peak efficiency, providing ample heating for homes even in the coldest months. The use of a durable, high-quality heat exchanger material contributes to the longevity of the unit, reducing the need for frequent repairs or replacements.

Ease of use is another hallmark of the 47-393 series. With an intuitive digital display, users can effortlessly monitor and adjust settings as required. The controls are straightforward, allowing for quick temperature adjustments, system diagnostics, and alerts, creating a hassle-free experience for homeowners.

Safety features are inherent in these models, including built-in safeguards against overheating and pressure fluctuations. The automatic shut-off mechanism ensures that the boiler operates within safe parameters, providing peace of mind to users.

Furthermore, maintenance is simplified with the easy access design. The accessible components make it straightforward for service technicians to perform routine checks and repairs. Regular maintenance is essential for sustaining high performance and extending the lifespan of the boiler.

In conclusion, the Baxi Potterton 47-393-42, 47-393-39, 47-393-41, and 47-393-40 models represent a blend of efficiency, safety, and convenience. Their advanced technologies and features not only enhance the user experience but also contribute to more sustainable heating solutions for homes. Investing in one of these advanced boilers ensures reliable performance, lower energy costs, and a commitment to environmental responsibility.
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