6 720 610 576 GB (03.02)
2
Contents
Contents
Safety precautions 3
Symbols 3
1 Details of the appliance 4
1.1 EC Declara ion of Conformi y 4
1.2 S andard package 4
1.3 Descrip ion of appliance 4
1.4 Accessories 5
1.5 Casing dimensions 5
1.6 Layou of appliance 6
1.7 Func ion 7
1.8 Elec rical wiring diagram 8
1.9 Technical da a ZWB 7/11-25 9
1.10 Technical da a ZWB 7/11-30 10
2 Installation regulations 11
3 Installation 12
3.1 Impor an remarks 12
3.2 Domes ic ho wa er 12
3.3 Sealed sys ems 12
3.4 Si ing he appliance 13
3.5 Wall moun ing frame assembly 14
3.6 Pre-piping he sys em 14
3.7 Fi ing he appliance 15
3.8 Checking he connec ions 16
3.9 Flue Sys ems 16
3.9.1 Si ing he Flue Terminal 17
3.9.2 Ins alla ion of he flue 18
3.9.3 Flue duc prepara ion and assembly 20
4 Electrical connections 21
4.1 Connec ing he appliance 21
4.2 Mains Vol age ex ernal con rols connec ions 22
5 Commissioning 23
5.1 Commissioning 23
5.2 Swi ching he appliance on/off 24
5.3 Swi ching on he cen ral hea ing 24
5.4 Sys em con rols 24
5.5 Se ing he domes ic ho wa er
empera ure and flow ra e 25
5.5.1 Domes ic ho wa er empera ure 25
5.5.2 Ho wa er flow ra e 25
5.6 Summer mode (ho wa er only) 25
5.7 Fros pro ec ion 25
5.8 Pump an i-seize func ion 25
5.9 Faul Condi ion 26
6 Individual settings 27
6.1 Mechanical se ings 27
6.1.1 Checking he size of he expansion vessel 27
6.1.2 Se ing he cen ral hea ing flow empera ure 27
6.1.3 Changing he hea ing pump charac eris ic 27
6.2 Se ings on he Bosch Hea ronic 28
6.2.1 Opera ing he Bosch Hea ronic 28
6.2.2 Selec ing he pump con rol mode for cen ral
hea ing mode (Service Func ion 2.2) 28
6.2.3 Se ing he an i-cycle ime
(Service Func ion 2.4) 28
6.2.4 Se ing he maxim CH flow empera ure
(Service Func ion 2.5) 29
6.2.5 Se ing he swi ching difference
(Service Func ion 2.6) 29
6.2.6 Se ing he hea ing ou pu
(Service Func ion 5.0) 29
6.2.7 Cons an ho wa er cycle ime
(Service Func ion 6.8) 29
6.3 Se ing he gas/air ra io 29
7 Converting the appliance to different
gas types 30
7.1 Se ing he gas/air ra io 30
7.2 Tes ing combus ion air/flue gas a se
hea ou pu 31
7.2.1 Tes ing he O
2
or CO
2
level in he
combus ion air 31
7.2.2 Tes ing CO and CO
2
32
8 Maintenance 32
8.1 Pre-Service Check Lis 33
8.2 Descrip ion of servicing opera ions 34
8.3 Replacemen of Par s 37
8.3.1 PCB con rol board and ransformer 37
8.3.2 Fan Assembly 38
8.3.3 Pump 39
8.3.4 3-way diver er valve 39
8.3.5 3-way diver er valve mo or 39
8.3.6 Sensors 40
8.3.7 Gas Valve 40
8.3.8 Domes ic Ho Wa er Hea Exchanger 41
8.3.9 Elec rode assembly 41
8.3.10Pressure gauge 41
8.3.11Expansion vessel 41
8.3.12Pressure Relief Valve 41
8.3.13Burner 41
8.3.14Flow swi ch 41
8.3.15Primary Hea Exchanger 42
9 Appendix 43
9.1 Faul Codes 43
9.2 Shor par s lis 44
9.3 Hea ing/ho wa er ou pu se ings
ZWB 7-25 N.G. 45
9.4 Hea ing/ho wa er ou pu se ings
ZWB 11-25 L.P.G. 45
9.5 Hea ing/ho wa er ou pu se ings
ZWB 7-30 N.G. 45
9.6 Hea ing/ho wa er ou pu se ings
ZWB 11-30 L.P.G. 45
9.7 Opera ional Flow diagrams 46
9.7.1 Domes ic ho wa er func ion 46
9.7.2 Cen ral hea ing func ion 47
