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Baxi Duo-tec 2 Combi 24 GA, Technical Manual

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Baxi Duo-tec 2 Combi 24 GA Technical Manual Download Page 25

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© Baxi Heating UK Ltd 2012

15.0 Hydraulics (cont.)

Megaflo 2 System GA

The Megaflo 2 GA hydraulics are of a composite construction.

Key components are the same as the Neta-tec Combi GA and the connection points for the pressure gauge and pressure
vessel are the same.

Pressure Sensor

Bypass

Pressure Gauge

Connection

Pressure Vessel

Connection

Summary of Contents for Duo-tec 2 Combi 24 GA

Page 1: ...Heating UK Ltd 2012 Neta tec Combi GA Range Duo tec 2 Combi GA Range Megaflo 2 System GA Range Gas Fired Wall Mounted Condensing Combination System Boilers Appliance Technical Guide Service Engineer E...

Page 2: ...ing 26 17 0 Electrical Measurements 29 18 0 Parts Matrix 30 19 0 E133 Flow Chart 31 20 0 Commissiong Procedure Errors 32 21 0 Additional Information 33 22 0 Pages for Notes 34 Page Contents Appliance...

Page 3: ...gas carrying parts or R D S are changed to achieve 9 0 0 2 CO2 on N G 10 5 0 2 CO2 on N G The adjustable Set Flames are at three fixed fan speeds 00 min IGN ignition Displayed as 33 41 etc It is a of...

Page 4: ...ve Opens Spark Ignition Flame On Flame Stabilization Full C H Rate No Ignition E133 Reset 5 Attempts Ignition Achieved Loss of Flame E128 Reset 5 Seconds Stabilization Boiler Operating 2 0 Combi C H S...

Page 5: ...D H W Sequence of Operation Pump On Pump Check by Water Pressure OK E430 Yes No Fan On RPM Check OK E160 Yes No Ignition No Ignition E133 Reset 5 Attempts Ignition Achieved Yes No Flame Stabilization...

Page 6: ...ns Spark Ignition Flame On Flame Stabilization Full Rate Loss of Flame 5 Seconds Stabilization Boiler Operating 4 0 System C H Sequence of Operation E430 Yes No No Ignition E133 Reset 5 Attempts Ignit...

Page 7: ...mplete The total time for the CF is between 10 and 12 minutes Activation of Commissioning Function CF from initial Power On See page 32 for the flow diagram Once power is supplied to the boiler the di...

Page 8: ...back to 000 Commissioning To activate the GasType Check press and hold the ip and CH ve as normal and the boiler will now complete the GasType Check IMPORTANT NOTE IT IS NOT POSSIBLETO CALIBRATE A NEW...

Page 9: ...ther for 6 seconds to enter the TSP Menu P01 will be displayed Use CH ve to scroll to P22 Press the ip button to toggle into the P value Change 00 to 15 15 is the SD counter reset code Press the ip bu...

Page 10: ...art again To prevent this from happening open one or two D H W taps whilst in F304 and the boiler will automatically dump the heat through the D H W circuit In the case of System models it is recommen...

Page 11: ...button has been missed Power down at the fused spur and start again DO NOT TURN ON THE ANALYSER PUMP WHILST THE BOILER IS CALIBRATING AS THE INTERNAL CELL MAY BECOME SATURATED Remove the boiler front...

Page 12: ...is complete the flame tap radiator icons will flash and the display alternate between 00 and a value This value is the Set Flame Value The Set Flame controls the ionization signal and thus the combus...

Page 13: ...isplay will alternate between the ignition fan speed 33 and the Set Flame value 38 in this example Change the Set Flame value to achieve 9 0 CO2 by pressing CH ve or CH ve Press the ip button followed...

Page 14: ...he ip button and CH ve for 6 seconds 304 will be displayed and the boiler will operate at maximum fan speed 100 will be displayed alternating with the boiler temperature Pressing CH ve button will cha...

Page 15: ...ntil P02 is displayed Press the ip button to view the selected parameter Pressing the CH ve and CH ve buttons modifies the parameter P02 0 Boiler set for N G P02 1 Boiler set for L P G Press the ip bu...

Page 16: ...ess the ip button i 00 Error Subcode See table on page 18 i 01 C H Temperature C i 02 ExternalTemperature if present C i 03 D H W Temperature C i 03 i 04 are the same sensor i 04 D H W Temperature C i...

Page 17: ...ote them down as they alternate between each other The order is Error Number Error Code Counter for the same Error Days elapsed since Event System Status Phase Status C H Flow during Event Counter for...

Page 18: ...on For example P32 C01 P32 E06 P32 02 P32 000 P32 03 P32 05 P32 75 C The C value is always the start of the sequence Error Table for Engineers Table for recording errors 11 0 Error History cont P32 C0...

Page 19: ...ill activated motor energized Auto Refill open too long to fill check system Check the sensor Check the sensor Check the sensor Check the sensor Check the sensor Check the sensor Check the sensor Chec...

Page 20: ...e Check the water pressure Check correct circulation of the water and pump Check correct circulation of the water and pump Check correct circulation of the water and pump Check the sensing electrode a...

Page 21: ...ll not work without the R D S and the display will be blank The R D S will store in its memory the Calibration settings for that particular boiler and also the boiler type and output If changing a P C...

Page 22: ...are extremely difficult to measure with a multi meter so it is advisable not to measure this signal Disconnecting the lead and checking the plug will result in an E09 error If the boiler keeps going t...

Page 23: ...ront Behind the Pressure Gauge there is an inline filter cage The pump is 2 speed operational In D H W it operates only at Max speed In C H it switches between the two speeds depending upon temperatur...

Page 24: ...d type The connection for the Pressure Sensor has an adaptor to take the clipped connection The capillary pressure gauge connection is on the flow assembly above the D H W sensor position The Pressure...

Page 25: ...The Megaflo 2 GA hydraulics are of a composite construction Key components are the same as the Neta tec Combi GA and the connection points for the pressure gauge and pressure vessel are the same Press...

Page 26: ...ion Electrode Flame Sensing Electrode Gas Valve Fan Safety Thermostat DiverterValve Motor Hydraulic Pressure Switch DHW NTC Sensor Pump Hall Effect Sensor X3 b r w b b r r r bk g b g br w b g br bk b...

Page 27: ...nition Electrode Flame Sensing Electrode Gas Valve Fan Safety Thermostat DiverterValve Motor Hydraulic Pressure Switch DHW NTC Sensor Pump Hall Effect Sensor X3 b r w b b r r r bk g b g br w b g br bk...

Page 28: ...or Heating Flow Sensor Spark Ignition Electrode Gas Valve Fan Safety Thermostat Hydraulic Pressure Switch Pump X3 b b r r r bk g b g br w b g br bk b b br br b b br b b bk g y b br bk gr g y g y g y g...

Page 29: ...re at the smaller P C B connections such as the Electronic GasValve as the voltages need to be taken from the actual edge connector on the board and damage could easily occur Water Temperature Sensors...

Page 30: ...18 0 Parts Matrix 30 Baxi Heating UK Ltd 2012...

Page 31: ...missioning Function Calibrate CH ve Reset then ip Page 11 Mini Calibrate CH ve Reset then ip Page 8 When 000 displayed start Commissioning ip CH ve 312 completed then Gas Check Check electrode gap gas...

Page 32: ...o Yes Check electrode gap gas supply etc Boiler commissioned Check boiler temp has not reached 85 C E133 or other gas error displayed Boiler will find an ignition curve to ignite briefly display 100 t...

Page 33: ...rect gas type Set Flame Reference Guide Calibration Mode Use the values below to assist in setting the flame to the correct combustion leveles Set FlameValues Fan Speeds Model 00 IGN 100 24C 48 38 37...

Page 34: ...22 0 Notes 34 Baxi Heating UK Ltd 2012...

Page 35: ...35 Baxi Heating UK Ltd 2012 22 0 Notes...

Page 36: ...which may affect the accuracy of the information contained in this leaflet All goods are sold subject to our standard Conditions of Sale which are available on request BAXI A Trading Division of Baxi...

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