Uk/ie user instructions wall hung rsf gas fired condensing combination boiler greenstar 24i junior/28i junior 6720643356-00.1w o for sealed central heating systems and mains fed domestic hot water 6 720 8 02 048 (2013/05) the appliance is for use with natural gas or l.P.G. (cat ii 2h3p type c13, c33...
2 preface 6 720 802 048 (2013/05) preface please read these instructions carefully these instructions are applicable to the worcester, bosch group boiler model stated on the front cover only. These instructions apply in the uk/ie only and must be followed except for any statutory obligation. After i...
3 contents 6 720 802 048 (2013/05) contents 1 symbols and safety precautions . . . . . . . . . . 4 1.1 explanation of symbols . . . . . . . . . . . . 4 1.2 safety precautions . . . . . . . . . . . . . . . 4 2 general information . . . . . . . . . . . . . . . . . . . . 5 3 controls . . . . . . . . . ...
4 symbols and safety precautions 6 720 802 048 (2013/05) 1 symbols and safety precautions 1.1 explanation of symbols warning symbols signal words indicate the seriousness of the hazard in terms of the consequences of not following the safety instructions. • notice indicates possible damage to proper...
5 general information 6 720 802 048 (2013/05) 2 general information servicing ▶ the boiler must be serviced regularly by a competent, qualified person, such as a worcester service engineer or other gas safe registered engineer. ▶ always use original spares, to help maintain the economy, safety and r...
6 controls 6 720 802 048 (2013/05) 3 controls ▶ to gain access to the boiler controls push the top centre of the flap and release. Fig. 1 control panel fascia boiler controls 1 central heating temperature control 6 eco button 2 burner indicator (green) 7 reset button 3 service button 8 hot water tem...
7 controls 6 720 802 048 (2013/05) 3.1 operating the boiler 3.1.1 setting the central heating temperature 1. Turn the central heating temperature control knob to the desired level. Temperatures given in the figure below are approximate. 2. The burner indicator (green) will illuminate to show that th...
8 controls 6 720 802 048 (2013/05) 3.1.4 setting the hot water temperature 1. Turn the hot water temperature control knob to the desired level. Fig. 4 hot water temperature 3.1.5 domestic hot water pre-heat the hot water heat exchanger is kept “pre-heated” to reduce the time taken to deliver hot wat...
9 controls 6 720 802 048 (2013/05) 3.1.6 boiler reset in the event of a fault, the reset button will flash once per second and the blue mains indicator light will flash. 1. To reset the boiler press the reset button for approximately five seconds. When the boiler resets the reset button will no long...
10 system pressure 6 720 802 048 (2013/05) 4 system pressure 4.1 sealed heating systems this boiler is fitted to a sealed heating system which is pre-pressurised. Your installer will advise you of the minimum and maximum pressure indicated on the pressure gauge. ▶ check regularly that the pressure i...
11 system pressure 6 720 802 048 (2013/05) 4.3 optional integral keyless filling link locate filling link and follow instructions for re-pressurising. 1. If the needle on the appliance pressure gauge reads less than 1 bar, re-charge the system. 2. Pull the blue lever down to start the filling proces...
12 system pressure 6 720 802 048 (2013/05) 4.4 optional integral keyed filling link locate filling key and follow instructions for re-pressurising. 1. Push the filling key firmly into the body of the filling link, ensuring the arrow on the key shaft lines up with the open padlock symbol. 2. Turn the...
13 system pressure 6 720 802 048 (2013/05) 4.5 external filling loop once the external filling loop has been located, follow the instructions for re-pressurising the system. 1. Unscrew blanking cap. 2. Attach the hose to the valves, screw on hand-tight. 3. Turn the handle/screwdriver slot through 90...
14 service clearances 6 720 802 048 (2013/05) 5 service clearances your installer will have provided adequate space around the boiler for safety and servicing access. Fig. 12 service clearances 6 maintaining your boiler your new gas-fired boiler represents a long term investment in a reliable, high ...
15 fault finding 6 720 802 048 (2013/05) 7 fault finding if a boiler fault occurs, please read the following page thoroughly before contacting worcester, bosch group. Extreme cold weather in instances where the condensate pipe work is run external or in an unheated area, such as a garage, it can be ...
16 fault or breakdown 6 720 802 048 (2013/05) 8 fault or breakdown this boiler is supported in the uk and eire by worcester, bosch group. Specialist service engineers are available to attend a breakdown occurring on this boiler. • no charge will be made for parts and/or labour providing: a boiler fa...
17 tips on energy saving 6 720 802 048 (2013/05) 9 tips on energy saving heating economically the boiler provides a high level of comfort whilst keeping gas consumption and the environment effects as low as possible. The gas supply to the burner is controlled according to the level of demand for hea...
18 your guarantee 6 720 802 048 (2013/05) 10 your guarantee this boiler is guaranteed against faulty materials or workmanship for a period of 2 years from the date of installation subject to the following terms and conditions. • during the period of this guarantee any components of the boiler which ...
19 glossary 6 720 802 048 (2013/05) 12 glossary central heating systems all radiators must be heated at an even rate. If the top of a radiator is at a lower temperature than the bottom then it should be vented by releasing air through the venting screw at the top of the radiator. Ask your installer ...
Worcester, bosch group: technical support: 0844 892 3366 appointments: 0844 892 3000 spares: 01905 752571 literature: 0844 892 9800 training: 01905 752526 sales: 01905 752640 worcester, bosch group cotswold way, warndon, worcester wr4 9sw. Tel. 0844 892 9900 worcester, bosch group is a brand name of...
