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  4. 24I RSF
  5. Installation And Servicing Instructions

Worcester 24I RSF Installation And Servicing Instructions

Other manuals for 24I RSF: Installation And Servicing Instructions
Manual is about: Bosch Appliances Boiler 24I RSF

Summary of 24I RSF

  • Page 1

    Supplied by www.Heating spares.Co tel. 0161 620 6677 24i rsf wall mounted combination boiler for central heating and mains fed domestic hot water installation and servicing instructions gc numbers n.G. 47 311 37 l.P.G. 47 311 38 boiler output to domestic hot water – modulated control minimum 7.5 kw ...

  • Page 2

    Supplied by www.Heating spares.Co tel. 0161 620 6677 1.1 gas safety (installation and use) regulations, october 1994 all gas appliances must be installed by a competent person in accordance with the above regulations. Failure to install appliances correctly could lead to prosecution. 1.2 the manufac...

  • Page 3

    Supplied by www.Heating spares.Co tel. 0161 620 6677 fully modulating controls in the central heating and domestic hot water modes of operation. An expansion vessel, pressure gauge and pressure relief valve. A fixed by-pass for the central heating system. A temperature safety cut-out control. A wate...

  • Page 4

    Supplied by www.Heating spares.Co tel. 0161 620 6677 the data plate is fixed to the inner casing cover. 3. Data tables 4 nominal boiler ratings output input (net). Burner setting gas rate pressure kw btu/h kw btu/h m bar. In. Wg. M 3 /h ft 3 /h natural gas 7.5 (25,600) 9.60 (32,750) 1.0 0.4 1.01 35....

  • Page 5

    Supplied by www.Heating spares.Co tel. 0161 620 6677 4.1 the appliance may be installed in any room although particular attention is drawn to the requirements of the current iee wiring regulations bs 7671 and, in scotland, the electrical provisions of the building regulations applicable in scotland,...

  • Page 6

    Supplied by www.Heating spares.Co tel. 0161 620 6677 see fig. 3. 5.1 the flue must be installed as specified in bs 5440:part 1. 5.2 the terminal must not cause an obstruction nor the discharge cause a nuisance. 5.3 if a terminal is fitted less than 2 metres above a surface to which people have acces...

  • Page 7

    Supplied by www.Heating spares.Co tel. 0161 620 6677 see figs. 4. 7.1 the system must comply with the requirements of bs 6798 and bs 5449. 7.2 the appliance must not be operated without the system being full of water, properly vented and pressurised. 7.3 the pressure relief valve operates at 3 bar (...

  • Page 8

    Supplied by www.Heating spares.Co tel. 0161 620 6677 9.1 the following are general requirements and, if necessary, reference should be made to the local water company before fitting the appliance. 9.2 mains cold water inlet. Devices capable of preventing the flow of expansion water must not be fitte...

  • Page 9

    Supplied by www.Heating spares.Co tel. 0161 620 6677 10.1 mains supply. 230 v ~, 50 hz, 180 watts. External fuse: 3a. Internal fuses: 2at hrc(f1), and 1.Af (f2). 10.2 it must be possible to completely isolate the appliance. 10.3 the following connection alternatives must be used: a 3 amp fused three...

  • Page 10

    Supplied by www.Heating spares.Co tel. 0161 620 6677 10 fig. 9. Functional flow diagram. F1 2athrc f2 1.25at optional links spark flame sense outputs inputs mains indicator modulating valve overheat stat x6 pins 8 & 9 x6 pins 15 & 16 x6 pins 5,6 & 7 x6 pins 1 & 2 x6 pins 19 & 20 x6 pins 3 & 4 flow s...

  • Page 11

    Supplied by www.Heating spares.Co tel. 0161 620 6677 technical helpline. Note: read this section fully before commencing installation. 11.1 general the appliance is only suitable for fitting to a sealed system. The flue must be installed as specified in bs5440:1. Check that the appliance is suitable...

  • Page 12

    Supplied by www.Heating spares.Co tel. 0161 620 6677 11.8 air and flue duct preparation the method of installation of the flue system may be varied to suit the actual site conditions. The instructions for connecting and fixing the ducts must, however, be strictly followed. Remove all packing materia...

  • Page 13

    Supplied by www.Heating spares.Co tel. 0161 620 6677 if l is between: 725 - 1175mm (1 extension) 1475 - 1925mm (2 extension) 2225 - 2500mm (3 extension) it is necessary to shorten the assembly by cutting the first extension duct assembly i.E. L = 1000mm - remove 175mm from the air and flue ducts. No...

  • Page 14

    Supplied by www.Heating spares.Co tel. 0161 620 6677 11.12 flue bends 90° and 45° bends are available. A maximum of two bends may be used in addition to the first bend on the flue turret. A 90° bend is equivalent to 750mm of straight duct. A 45° bend is equivalent to 375mm of straight duct. A maximu...

  • Page 15

    Supplied by www.Heating spares.Co tel. 0161 620 6677 11.13 vertical adapter for horizontal flues an adapter is available for an initial short section of vertical flue. Refer to fig. 22. Measure and cut the flue as described in section 11.12. The first, vertical, section (equivalent to dimension x) i...

  • Page 16

    Supplied by www.Heating spares.Co tel. 0161 620 6677 benchmark water treatment: for optimum performance after installation, this boiler and its associated central heating system should be flushed in accordance with the guidelines given in bs7593:1992 - treatment of water in domestic hot water system...

  • Page 17

    Supplied by www.Heating spares.Co tel. 0161 620 6677 if the pressure indicated on the pressure gauge is greater than 2.6 bar when operating at the maximum central heating temperature, an extra expansion vessel must be fitted to the system as close as possible to the appliance central heating return ...

  • Page 18

    Supplied by www.Heating spares.Co tel. 0161 620 6677 13.1 tell the user how to operate the appliance and hand over the users instructions leaflet. 13.2 tell the user what to do if the heating system is not to be used in frosty weather. 13.3 tell the user the sealed system set pressure. 13.4 tell the...

  • Page 19

    Supplied by www.Heating spares.Co tel. 0161 620 6677 14.3 dismantle the appliance to carry out a full and comprehensive service of the appliance remove the following parts to gain access to the components which need to be checked or serviced. (a) cabinet front panel. Remove by lifting off the suppor...

  • Page 20

    Supplied by www.Heating spares.Co tel. 0161 620 6677 15.1 important switch off the electricity and gas supplies before replacing any components. After the replacement of any components, check for gas soundness where relevant and carry out functional checks as described in section 12 - commissioning ...

  • Page 21

    Supplied by www.Heating spares.Co tel. 0161 620 6677 6. Combustion chamber insulation. Check that the electricity supply to the appliance is turned off. Drain the central heating circuit as described in section 15.3(a). Remove the inner casing cover, fan, flue hood assembly, burner, and gas to water...

  • Page 22

    Supplied by www.Heating spares.Co tel. 0161 620 6677 sink compound between the faces. Refit the leads. 13. Domestic hot water sensor. Check that the electricity supply to the appliance is turned off. Hinge the facia assembly in the servicing position as described in section 14.3(c and d). Carefully ...

  • Page 23

    Supplied by www.Heating spares.Co tel. 0161 620 6677 20. Control board. Check that the electricity supply to the appliance is turned off. Undo the 3 screws and remove the facia bottom panel. Remove the two upper screws and hinge down the facia assembly. Carefully pull off all the connectors. Disconn...

  • Page 24

    Supplied by www.Heating spares.Co tel. 0161 620 6677 24 end of a domestic hot w ater o verrun escape pause b y resetting the mains electricity supply off-on anti-cy cle dela y m ain gas v alv e off 6 either aut oma tic st art -up sequence 1. Central heating mode no p ass present present absent absen...

  • Page 25

    Supplied by www.Heating spares.Co tel. 0161 620 6677 25 signal fr om the flow swit ch ho t w a ter demand (ov errides all other o verrun modes and functions) no demand and primary temper atur e below 6°c monit or ed b y the centr al heating sensor internal "a ut ofr ost at" demand run pump below 4°c...

  • Page 26

    Supplied by www.Heating spares.Co tel. 0161 620 6677 26 f1 2athrc f2 1.25at optional links spark flame sense outputs inputs mains indicator modulating valve overheat stat x6 pins 8 & 9 x6 pins 15 & 16 x6 pins 5,6 & 7 x6 pins 1 & 2 x6 pins 19 & 20 x6 pins 3 & 4 flow signal ch temp. Sensor dhw temp. S...

  • Page 27

    Supplied by www.Heating spares.Co tel. 0161 620 6677 27 fault in central heating fault in domestic hot water is mains led flashing? Is mains led iluminated? Turn control knob fully clockwise set room stat to call for heat ensure link is fitted at x2 pins 2 & 3 set clock to call for heat has overheat...

  • Page 28

    Supplied by www.Heating spares.Co tel. 0161 620 6677 28 no mains led connect mains supply replace fuse is f1 (2athrc) ok? Is f2 (1.25at) ok? Faulty pcb replace flashing mains led remove x6 open circuit? Replace thermistor replace harness short circuit faulty pcb replace is resistance between pins 3 ...

  • Page 29

    Supplied by www.Heating spares.Co tel. 0161 620 6677 29 the overheat thermostat can be reset by pressing the reset button, but if it trips immediately or on a regular basis a serious problem has occurred therefore contact your installer reset thermostat overheat thermostat check pump check fan check...

  • Page 30

    Supplied by www.Heating spares.Co tel. 0161 620 6677 30 thermistor check harness continuity check harness short check remove connectors from thermistor thermistor ok remove appropriate connectors is continuity observed between each end of wire in question? Faulty harness or connector harness ok remo...

  • Page 31

    Supplied by www.Heating spares.Co tel. 0161 620 6677 31 ignition check is fan running? Is sparking present at the electrodes? Faulty pcb replace connect ignition leads securely are leads breaking down? Ignition coil faulty replace pcb replace leads does burner continue? Does gas pressure modulate? I...

  • Page 32

    Supplied by www.Heating spares.Co tel. 0161 620 6677 32 remove brown and white terminals from air pressure switch air pressure switch faulty with no demand, is a short-circuit observed at exposed aps terminals? Reconnect the white & brown wire and remove the green wire. Initiate a demand. Does the f...

  • Page 33

    Supplied by www.Heating spares.Co tel. 0161 620 6677 with pressure above minimum, remove modureg lead. Does pressure drop to minimum? 33 is minimum pressure observed at burner at all times? Modulating valve check flow switch check go to check i yes yes go to check i yes yes no no harness ok yes yes ...

  • Page 34

    Supplied by www.Heating spares.Co tel. 0161 620 6677 34 key g.C. No. Part manufacturer’s reference qty whs no. Part no. 1 e01-579 burner assembly natural gas aeromatic ac23/053586 1 8 716 142 604 0 e01-580 burner assembly lpg aeromatic ac23/053587 1 8 716 142 611 0 2 e01-591 injector natural gas ste...

  • Page 35

    Supplied by www.Heating spares.Co tel. 0161 620 6677 35 9 8 14 3 21 1 15 13 4 22 11 7 12 10 23 20 6 25 24 2 19 18 16 23.

  • Page 36

    Supplied by www.Heating spares.Co tel. 0161 620 6677 this booklet is accurate at the date of printing but will be superseded and should be disregarded if specifications and/or appearances are changed in the interests of continued improvement. All goods sold are subject to our official conditions of ...