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2 About this manual

2.1

General

2.3

Symbols used

2.3.1

Symbols used in the manual

This manual uses various danger levels to draw attention to special

instructions. We do this to improve user safety, to prevent problems and to

guarantee correct operation of the appliance.

Danger

Risk of dangerous situations that may result in serious personal

injury.

Danger of electric shock

Risk of electric shock.

Warning

Risk of dangerous situations that may result in minor personal

injury.

Caution

Risk of material damage.

Important

Please note: important information.

See

Reference to other manuals or pages in this manual.

Warning

Installation, repair and maintenance must only be carried out only

by a competent person.

All Gas Safe registered engineers carry an ID card with their licence

number and a photograph. You can check your engineer is registered by

telephoning 0800 408 5500 or online at www.gassaferegister.co.uk
This manual is intended for the user of the Baxi 400 Combi 2 boiler. If the

appliance is sold or transferred, or if the owner moves leaving the

appliance behind you should ensure that the manual is kept with the

appliance for consultation by the new owner and their installer.
The appliance is designed as a boiler for use in residential domestic

environments on a governed meter supply only. The selection of this boiler

is entirely at the owner’s risk. If the appliance is used for purposes other

than or in excess of these specifications, the manufacturer will not accept

any liability for resulting loss, damage or injury.
The manufacturer will not accept any liability whatsoever for loss, damage

or injury arising as a result of failure to observe the instructions for use,

maintenance and installation of the appliance.

2.2

Additional documentation

Various timers, external controls, etc. are available as optional extras. Full

details are contained in the relevant sales literature.

2.4

Abbreviations/glossary

Central heating

DHW

PCU

Pnc

Domestic hot water

PCB for managing burner operation

Condensing output

Safety PCB

400 Combi 2

Содержание 430 Combi 2

Страница 1: ...nstructions in a safe place If you move house please hand them over to the next occupier United Kingdom en User Guide High efficiency wall hung condensing gas boiler 424 Combi 2 430 Combi 2 424 Combi LPG 2 430 Combi LPG 2 ...

Страница 2: ...using the product and keep it in a safe place for later reference In order to ensure continued safe and efficient operation we recommend that the product is serviced regularly Our service and customer service organisation can assist with this We hope you enjoy years of problem free operation with the product ...

Страница 3: ...sories options 13 5 Operation 14 5 1 Start up 14 5 1 1 Procedure for first start up 14 5 1 2 Changing the heating flow temperature 14 5 1 3 Changing the domestic hot water DHW temperature 14 5 2 Shutdown 15 5 2 1 Switching off the heating and domestic water DHW 15 5 3 Frost protection 15 6 Settings 16 6 1 Access to USER parameters 16 7 Maintenance 18 7 1 General 18 7 2 Maintenance instruction 18 7...

Страница 4: ... 29 9 Decommissioning 26 9 1 Decommissioning procedure 26 Contents 12 2 Standard warranty terms and conditions 29 11 2 Room thermostats and settings 28 13 Appendix 31 13 1 Product fiche Combination boilers 31 13 2 Package fiche boilers 32 13 3 Package fiche Combination heaters boilers or heat pumps 34 4 400 Combi 2 ...

Страница 5: ...cted the boiler can be isolated at the inlet valves by turning their taps through 90 1 4 turn downwards A ON B OFF For advice please contact your Installer Annual Service Provider or Baxi Customer Support The Service Division of Baxi You can contact Baxi Customer Support on telephone number 0344 871 1545 When contacting Baxi Customer Support it will be useful to have the Benchmark Checklist at the...

Страница 6: ...uk 1 2 2 Benchmark Commissioning Checklist Please ensure that the installer has fully completed the Benchmark Checklist on the inside back pages of the installation instructions supplied with the product and that you have signed it to say that you have received a full and clear explanation of its operation The installer is legally required to complete a commissioning checklist as a means of comply...

Страница 7: ...ance in compliance with prevailing legislation and standards Carry out initial commissioning and any checks necessary Explain the installation to the user If maintenance is necessary warn the user of the obligation to check the appliance and keep it in good working order Give all the instruction manuals to the user 1 3 3 Manufacturer s liability Our products are manufactured in compliance with the...

Страница 8: ...is manual is intended for the user of the Baxi 400 Combi 2 boiler If the appliance is sold or transferred or if the owner moves leaving the appliance behind you should ensure that the manual is kept with the appliance for consultation by the new owner and their installer The appliance is designed as a boiler for use in residential domestic environments on a governed meter supply only The selection...

Страница 9: ...88 2 88 Useful efficiency at 30 of rated heat output and low temperature setting 1 ƞ1 97 9 97 8 97 9 97 8 Auxiliary electricity consumption Full load elmax kW 0 037 0 026 0 037 0 026 Partial load elmin kW 0 014 0 014 0 014 0 014 Standby mode PSB kW 0 004 0 004 0 004 0 004 Other items Heat loss on standby Pstby kW 0 04 0 04 0 04 0 04 Ignition burner power consumption Pign kW Annual energy consumpti...

Страница 10: ...apacity of expansion vessel 424 430 424 LPG 430 LPG bar 0 8 0 8 0 8 0 8 bar 8 0 8 0 8 8 bar 0 15 0 15 0 15 0 15 l min 2 0 2 0 2 2 l min 11 5 14 11 5 14 C 35 60 35 60 35 60 35 60 l min 13 8 16 7 13 8 16 7 l min 9 8 11 9 9 8 11 9 Minimum pressure Maximum pressure Domestic water production with ΔT 35 C Minimum dynamic pressure Minimum water flow Specific flow D Temperature range for domestic water ci...

Страница 11: ... fitting G3 4 Domestic cold water inlet fitting G1 2 Heating circuit return fitting G34 3 Technical specifications 3 2 2 Dimensions and connections clearances Tab 8 Other characteristics 400 Combi 2 11 424 430 424 LPG 430 LPG IP X5D X5D X5D X5D kg 28 30 29 31 28 30 29 31 mm 700 395 285 700 395 285 700 395 285 700 395 285 Humidity protection rating EN 60529 Net weight when empty filled with water D...

Страница 12: ...n producing thermal energy 4 2 2 Combustion The burner heats the heating water circulating in the heat exchanger When the temperature of the combustion gas is lower than the dew point around 55 C the water vapour contained in the combustion gas condenses in the flue gas side of the heat exchanger The heat recovered during this condensation process the latent heat or condensing heat is also transfe...

Страница 13: ...g this knob you can modify the domestic hot water temperature DHW setpoint 35 60 C or scroll through the menus to the left and right turn anti clockwise to reduce the temperature turn clockwise to increase the temperature Fig 3 Control panel 1 Chimney sweep mode Chimney sweep mode is enabled forced full load or low load for CO2 measurement The burner is on Display of the system water pressure DHW ...

Страница 14: ... open a domestic water tap 5 1 2 Changing the heating flow temperature 1 Use the knob to adjust the flow temperature in heating mode Turn the knob anti clockwise to reduce the temperature value Turn the knob clockwise to increase the temperature value Important With an outside sensor connected it is possible to lower the setpoint value 2 Press the F4 key to confirm the value or wait a few seconds ...

Страница 15: ...pletely as changing the water can result in unnecessary and damaging limescale deposits from forming inside the boiler and heating elements If the thermal installation is not intended to be used during the winter months and there is a risk of frost we recommend mixing suitable antifreeze solutions designed for a specific purpose e g propylene glycol which contains limescale and corrosion inhibitor...

Страница 16: ...unction 0 Disabled 1 Weekly 2 Daily only available with Room Unit 0 User DP070 Domestic hot water temperature setpoint In the case of operation with a calorifier tank and programming via room unit corresponding to the comfort setpoint C 60 35 60 User DP200 DHW mode 0 Domestic hot water programming only available with Room Unit 1 Manual boiler with calorifier tank Preheating active instanta neous b...

Страница 17: ...ivity in the zone 22 5 30 User CP085 Temperature C set by CUSTOM activity in the zone 20 5 30 User CP200 Required ambient temperature C for the zone in manual mode 20 5 30 User CP250 Correct the temperature measured by the room unit 0 5 5 User CP320 Zone operating mode 0 Scheduling 1 Manual 2 Off 0 User CP510 Temporary room setpoint per zone 20 5 30 User CP550 Fireplace mode 0 Disabled 1 Enabled 0...

Страница 18: ... annually in accordance with the Installation and Service Manual and the relevant section of the Benchmark Service Record com pleted in order to maintain the warranty Note Taking out a maintenance contract is recommended Caution Maintenance operations must be performed by a qualified compe tent person Use only BAXI genuine spare parts The painted panels should be wiped with a damp cloth and then d...

Страница 19: ...alve 8 Wait until water comes out of the vent valve and then tighten it again 9 After venting check that the system is still at sufficient pressure 7 3 Maintenance message The purpose of this function is to warn the user that the boiler requires maintenance flashes When the letters SVC appear on the screen and the symbol the boiler requires maintenance Contact your installer Fig 11 Maintenance mes...

Страница 20: ...tact our authorised technical assistance centre E Stoppage reset required 8 2 Error codes 8 Troubleshooting Tab 11 List of temporary faults DISPLAY DESCRIPTION OF TEMPORARY FAULTS CAUSE Check Solution An installer is required for most checks and solu tions Group code Specific code H 00 42 Pressure sensor open faulty SENSOR CONNECTION PROBLEM Check the operation of the pressure sensor Check the sen...

Страница 21: ...ontact the Service Network H 02 07 Low pressure in heating circuit water filling required Check the installation pressure and restore Check the expansion vessel pressure Check for boiler installation leaks H 02 09 Partial stoppage of the boiler antifreeze function acti ve SIGNAL INDICATING BLOCKING INPUT Contact X15 open check connected devices Parameter configuration error Check AP001 H 02 10 Tot...

Страница 22: ...ive times in 24 hours GAS SUPPLY Check the gas supply pressure Check the gas valve calibration ELECTRODE PROBLEM Check the electrode connection and wiring Check the condition of the electrode FLUE GAS PIPES Check the air intake and flue gas exhaust pipes EXCHANGER ON FLUE GAS SIDE BLOCKED Check the cleanliness of the exchanger MAINS VOLTAGE Check the power supply voltage E 01 12 Temperature measur...

Страница 23: ... E 04 13 Fan blade blocked or maximum rpm exceeded FAN PCB PROBLEM Check the PCB fan connection Check the fan operation E 04 17 Fault in gas valve control circuit MAIN PCB ERROR Check the electrical connections for the gas valve E 04 18 The flow temperature is below the minimum tempera ture or the flow temperature sensor is not connected SENSOR CONNECTION PROBLEM Check the sensor PCB connection Ch...

Страница 24: ...Failed node initialisation ELECTRICAL CONNECTION ERROR Start the auto detect function parameter AD Check electrical connections of external devices A 02 54 Open Therm bus power supply error Check the devices connected to contact X17 Terminal board M2 7 8 A 02 55 Incorrect or missing serial number Contact the Service Network A 02 76 Internal memory reserved for full customisation of set tings No fu...

Страница 25: ...ing supplied with power Check fuses and switches Check whether the gas isolation cock is properly open If the property has a prepayment meter ensure it has sufficient credit The water pressure is too low 0 5 bar Re pressurise the system The boiler is not working The temperature set point for the heating is too low Increase the value with the CH temperature knob or if a room thermostat is connected...

Страница 26: ...e and system to decommission If your boiler needs to be decommissioned either temporarily or permanently the following should be performed 1 Switch off the boiler s electrical connection 2 Close the gas isolation tap 3 Drain the central heating system Seek the advice of your installer 9 Decommissioning 26 400 Combi 2 ...

Страница 27: ...r must be disposed of correctly by contacting staff at the nominated disposal facility or by taking it to a centre that is authorised to dispose of bulky waste domestic appliances Warning Removal and disposal of the boiler must be carried out by a qualified installer in accordance with local and national regulations Fig 12 Recycling MW 3000179 03 10 Disposal 10 1 Disposal and recycling 10 Disposal...

Страница 28: ...rgy consumption A few tips A modulating thermostat in combination with thermostatic radiator valves saves energy and offers considerable comfort This combination gives you flexibility with the temperatures Do not fit thermostatic radiator valves in the room in which the room thermostat is installed Completely closing and opening thermostatic valve radiators causes undesirable temperature fluctuati...

Страница 29: ... register your warranty online at www baxi co uk registration Annual service A service must be completed every 12 months from the date of installation to maintain your warranty This service must be completed by one of the following A Gas Safe registered installer engineer Baxi Customer Support call us 0344 871 1545 Please make sure that your engineer has logged the service information at the back ...

Страница 30: ... number Please note that for in warranty repairs our engineers will ask to see your service history record completed Benchmark Checklist and details of your installer These can all be found in the Installation and Service manual 12 Warranty 30 400 Combi 2 ...

Страница 31: ...file XL XL Seasonal space heating energy efficiency class Water heating energy efficiency class Rated heat output Prated or Psup kW 20 20 Space heating Annual energy consumption GJ 62 62 Water heating Annual energy consumption kWh 1 GJ 2 39 17 42 17 Seasonal space heating energy efficiency 93 93 Water heating energy efficiency 88 89 Sound power level LWA indoors dB 50 49 1 Electricity 2 Fuel 400 C...

Страница 32: ...er factors such as heat loss in the distribution system and the dimensioning of the products in relation to building size and characteristics Seasonal space heating energy efficiency class of package Seasonal space heating energy efficiency of package OR Seasonal space heating energy efficiency in Tank rating Collector efficiency in Tank volume in m Collector size in m Seasonal space heating energ...

Страница 33: ... 11 Prated whereby Prated is related to the preferential space heater Tab 16 Weighting of boilers Psup Prated Psup 1 2 II package without hot water storage tank II package with hot water storage tank 0 0 0 0 1 0 3 0 37 0 2 0 55 0 70 0 3 0 75 0 85 0 4 0 85 0 94 0 5 0 95 0 98 0 6 0 98 1 00 0 7 1 00 1 00 1 The intermediate values are calculated by linear interpolation between the two adjacent values ...

Страница 34: ...er heating energy efficiency of package under average climate Auxiliary electricity Water heating energy efficiency of combination heater Solar contribution from fiche of solar device Colder Warmer Water heating energy efficiency under colder and warmer climate conditions Declared load profile I II III The value of the water heating energy efficiency of the combination heater expressed in The valu...

Страница 35: ...chnological information contained in these technical instructions as well as any drawings and technical descriptions supplied remain our property and shall not be multiplied without our prior consent in writing Subject to alterations ...

Страница 36: ...ns visit www baxi co uk terms Failure to adhere to terms and conditions will void your manufacturer s warranty Baxi Brooks House Coventry Road Warwick CV34 4LL Please ensure the boiler is installed in accordance with these installation instructions and that you adhere to the Building Regulations e oe All descriptions and illustrations provided in this document have been carefully prepared but we r...

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