Bosch Appliances 14/19CBI, 9/14CBI FAIL POINT F

FAIL POINT F

Delivered primary water

temperature always too hot.

(Over 85°C)

Delivered primary water

temperature appears too

low with control knob set to

maximum.

(Less than 75°C)

Such a fault is likely to be caused

by one or more of the following:

Low gas pressure

Partially blocked flue

Partially blocked heat exchanger

Blocked/dirty burner

Gas valve sticking

Control board fault

Faulty themister

Replace control board.

Move control knob to lower

setting.

Check thermister

sensor/heat conductive

paste.

Contents

Main 9/14CBi, 14/19CBi, 19/24CBi WALL MOUNTED BOILERS FOR CENTRAL HEATING AND INDIRECT SUPPLY OF DOMESTIC HOT WATER INSTALLATION AND SERVICING INSTRUCTIONS APPLIANCE OUTPUTS 2. Introduction1. Installation Regulations Contents Fig. 1. Water flow diagram. 3. Technical Data Page 4. Siting The Appliance Fig. 2. Appliance casing dimensions and required clearances. * Space required for installation and servicing. Refer to Table 7 Fig. 3. Appliance pipework connections 6. Air Supply5. Flue terminal positions Fig. 4. Siting of the flue terminal. 8. Domestic Hot Water7. System Fig. 5. System layout if using Honeywell 'Y' plan Fig. 7. Fully pumped sealed system. Fig. 6. System layout if using Honeywell 'S' plan Fig. 8. Sealed system filling and make-up. 10. Electrical Fig.9 . Mains electricity and controls 9. Gas Supply Fig.10. Boiler wiring diagram Control Board Fig.11 . System wiring diagram Cable clamp Control Board Earth post OUTSIDE OF BOILER INSIDE OF BOILER Fig. 12a. Boiler Assembly 9/14CBi Shown set for Rear Only flue kit Page 11. Installation of the Boiler with a Rear Only Flue Kit 11.1 Unpacking the Boiler 11.1.2 Site Preparation 11.1.3 Fixing Holes and Flue Opening 11. Installing The Appliance Fig. 14 . Flue assembly - Rear Only Flue Kit Fig. 13a . Wall plate Fig. 13b . Flue and wall plate Fig. 13 . Fixing the wall mounting plate. Fig. 14a . Rear only flue assembly Fig. 14b . Rear of casing Fig. 16 . Fan/Flue hood Assembly with Rear Only Flue Kit Fig. 15 . Fixing the appliance to the wall mounting plate. 11.1.8 Completion of the Installation REFER NOW TO SECTION 12 - COMMISSIONING THE APPLIANCE 11.2 Installation of the Boiler with a Telescopic Horizontal Flue Kit 11.2.1 Unpacking the Boiler 11.2.2 Site Preparation 11.2.3 Fixing Holes and Flue Opening 11.2.4 Boiler Preparation Fig.20 . Extension Duct. Fig.21. Flue duct length (side flue). Fig.22 . Flue duct length (rear flue). Fig.19. Flue turret fixing and combustion sensing point 11.2.6 Telescopic Horizontal Flue Kit up to 750mm in Length 11.2.7 Telescopic Horizontal flue Kit Greater Than 750mm in Length Fig. 23. Flue bends. 11.2.9 Vertical Adaptor for Horizontal Flues 11.2.10 Fitting of the Flue Assembly without access to the Terminal 11.2.11 Install the Boiler Fig. 24 - Elbow to Flue Turret Assembly. Fig.25 Vertical Adaptor Fig.26 . Terminal assembly for internal fitting of the flue. Fig. 27 . Fixing the appliance to the wall mounting plate. 11.2.12 Installation of Flue onto Boiler Fig.29 . Flue Turret Fixing . Fig. 28 . Fan/Flue hood Assembly with Flue Turret Kit Fig. 30 . Mains electricity and controls 12. Commissioning The Appliance Fig. 31. Gas Valve. 14. Inspection And Service 13. Instructions To The User Fig. 32. User controls. 123 4 Fig. 33a. Inner Casing and control 9/14CBi 15. Replacement Of Parts Fig. 33b. Inner Casing and control 14/19 and 19/24CBi Fig. 34 . Inner Casing - Gas and Electric Controls. 9/14CBi shown. Fig. 35 . Base/Control Board Assembly 15.4.1 Gas Valve 15.4.2 Spark Electrode 15.4.3 Flame Sense Electrode Fig. 36. Burner Blade Assembly 14/19 and 19/24CBi Fig. 36a . Burner Blade Assembly 9/14CBi 15.4.5 Control Board 15.4.6 Fan Fig. 37 . Fan/Flue hood Assembly with Horizontal Flue Fig. 37a . Fan/Flue hood Assembly with Rear Only Flue 15.4.7 Air Flow Sensor 15.4.8 Temperature Sensor 15.4.9 Overheat Thermostat Fig. 39. Sensor and Overheat Thermostat Fig. 40. Air Pressure Switch Fig. 38 - 9/14CBi Fig. 38a - 14/19 and 19/24CBi + + 15.4.11 Combustion Chamber Insulation Fig. 41. Heat Exchanger Baffles in Position on the Heat Exchanger 16. Conversion Instructions 17. Short Parts List 18. Operational Flow Diagram Protection Systems 19. Fault Finding LIGHT SITUATION DURING FAULT FAIL POINT A FAIL POINT B No No No FAIL POINT C FAIL POINT D No FAIL POINT E 'BURNER LOCKOUT' No NOTE:Do not attempt to light the boiler with the combustion chamber cover removed. FAIL POINT F Page CONTROLS BOILER SERIAL No. NOTIFICATION No. FOR ALL BOILERS CONFIRM THE FOLLOWING FOR THE CENTRAL H EATING MODE, MEASURE & RECORD GAS BOILER COMMISSIONING CHECKLIST SERVICE INTERVAL RECORD SERVICE 10 SERVICE 9 SERVICE 8 SERVICE 7 Page www.worcester-bosch.co.uk Bosch Group