Baxi 424 Combi 2 Installation And Service Manual page 4

Contents
5.4 Choice of the location. ..................................................................................................................................................................... 26
5.4.1 Location of the boiler ................................................................................................................................................... 26
5.4.2 Bath and shower rooms ............................................................................................................................................. 26
5.4.3 Ventilation ..................................................................................................................................................................... 27
5.4.4 Condensate drain ........................................................................................................................................................ 27
5.4.5 Clearances .................................................................................................................................................................. 29
5.4.6 Flue/chimney location ................................................................................................................................................. 29
5.4.7 Horizontal flue/chimney systems. ............................................................................................................................. 31
5.4.8 Flue/chimney trim ........................................................................................................................................................ 32
5.4.9 Terminal guard ............................................................................................................................................................ 32
5.4.10 Flue/chimney deflector .............................................................................................................................................. 32
5.4.11 Flue/chimney accessories. ......................................................................................................................................... 32
5.4.12 Data plate and boiler service level ........................................................................................................................... 33
5.5 Transport. ..................................................................................................................................................................................... 33
5.6 Unpacking and initial preparation. ............................................................................................................................................ 34
5.6.1 Unpacking. ................................................................................................................................................................ 34
5.6.2 Initial preparation ....................................................................................................................................................... 35
5.7 Connecting diagrams ...................................................................................................................................................................... 35
5.7.1 Filling information ..................................................................................................................................................... 35
5.7.2 Domestic hot water circuit ....................................................................................................................................... 36
6 Installation. ............................................................................................................................................................................................. 37
General .......................................................................................................................................................................................... 37
6.1
Assembly ........................................................................................................................................................................................37
6.2
6.2.1 Fitting the pressure relief discharge pipe. ................................................................................................................ 37
6.2.2 Connecting the condensate drain ............................................................................................................................. 38
6.3 Air supply/flue gas connection ................................................................................................................................................... 38
6.3.1 Connecting the flue/chimney ...................................................................................................................................... 38
6.4 Electrical connections ................................................................................................................................................................... 39
6.4.1 Accessing the electrical connections ........................................................................................................................ 40
6.4.2 Connecting the room thermostat ............................................................................................................................... 40
6.4.3 Service connection (SERVICE) ................................................................................................................................. 41
6.4.4 Connecting on wall outdoor sensor. ......................................................................................................................... 41
6.4.5 Connecting the outside sensor. ................................................................................................................................. 41
6.4.6 Identifying label ............................................................................................................................................................ 41
6.5 Filling the installation ................................................................................................................................................................... 42
6.5.1 Flushing the system .................................................................................................................................................... 42
6.5.2 Fill the installation ........................................................................................................................................................ 42
6.5.3 Filling the condensate trap. ......................................................................................................................................... 42
6.6 Draining the installation ............................................................................................................................................................... 42
7 Commissioning. ..................................................................................................................................................................................... 43
7.1 General ........................................................................................................................................................................................... 43
7.2 Checklist before commissioning ................................................................................................................................................. 43
7.3 Commissioning procedure. .......................................................................................................................................................... 43
7.4 Gas settings. .................................................................................................................................................................................. 44
7.4.1 Check the operational (working gas inlet pressure and gas rate) ........................................................................ 44
7.4.2 Combustion parameters. ............................................................................................................................................. 44
7.4.3 Service settings ............................................................................................................................................................ 46
7.4.4 Calibrating the gas valve ............................................................................................................................................. 47
7.5 Final instructions .......................................................................................................................................................................... 49
7.5.1 Handover ....................................................................................................................................................................... 49
8 Operation. ....................................................................................................................................................................................................50
8.1 Use of the control panel. ................................................................................................................................................................... 50
8.1.1 Browsing the menus .................................................................................................................................................... 50
8.1.2 Running the automatic detection function ................................................................................................................. 50
8.1.3 Information menu display. ........................................................................................................................................... 50
8.1.4 Counter menu display. ................................................................................................................................................ 50
Combi 2
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