Worcester 47 311 43 Installation And Service Instructions Manual Download Page 4

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Appliance water flow diagram.

Fig. 1

F767_048

220 Flue terminal

221 Concentric air/flue duct

224 Air flow sensor

226 Fan

228 Differential air pressure switch

229 Combustion chamber

371 Gas valve Central Heating

372 Gas valve for domestic water

375 Slow ignition valve

377 Safety Gas Valve

378 Drain

379 Throttle disc

380 Gas setting screw

381 Secondary heat exchanger (dhw)

2 Flue temperature limiter

3 Burner pressure test point

7 Gas inlet test point

8 Thermometer

8.1 Pressure gauge

12 Bypass tube

15 Relief valve

18 Circulation pump with air

separator

20 Closed expansion vessel

26 Expansion vessel valve

27 Automatic air vent

29 Burner injectors

30 Burner

32 Flame sensor

33 Ignition electrode

36 Primary temperature sensor (NTC)

43 Central heating - flow

44 Domestic hot water outlet

45 Gas feed pipe

46 Cold water inlet

47 Central heating return

55 Gas filter

84 3 way diverter valve

90 Venturi

92 Water inlet filter

93 Water flow regulator

94 Diaphragm

96 Water flow sensor micro-switch

97 Water flow selector

Summary of Contents for 47 311 43

Page 1: ...6 BOILER OUTPUT To Domestic Hot Water Modulating control Minimum 7 0 kW Maximum 23 0 kW To Central Heating Minimum 10 0 kW Maximum 20 0 kW IMPORTANT THESE INSTRUCTIONS APPLY IN GREAT BRITAIN AND IRELAND ONLY THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER OR AT THE GAS METER This appliance must be installed by a competent person in accordance with the CURRENT Gas Safety Installation and Use Regula...

Page 2: ...pes must be capable of supplying this quantity of gas in addition to the demands of any other appliances being served The meter governor should deliver a dynamic pressure of 20mbar 8in wg for natural gas or 37mbar 14 4 in wg for propane at the inlet to the appliance 1 Installation Regulations 1 1 Gas Safety Installation and Use Regulations 1998 It is the law that all gas appliances are installed b...

Page 3: ...ired temperature the burner will extinguish The appliance will remain off for a fixed period of three minutes before re lighting to automatically meet the system requirements Domestic Hot Water and Central Heating The appliance will supply heat to the central heating system as required Ademand for domestic hot water at a tap or shower will override the central heating requirement for the period of...

Page 4: ...er pressure test point 7 Gas inlet test point 8 Thermometer 8 1 Pressure gauge 12 Bypass tube 15 Relief valve 18 Circulation pump with air separator 20 Closed expansion vessel 26 Expansion vessel valve 27 Automatic air vent 29 Burner injectors 30 Burner 32 Flame sensor 33 Ignition electrode 36 Primary temperature sensor NTC 43 Central heating flow 44 Domestic hot water outlet 45 Gas feed pipe 46 C...

Page 5: ... RATE kW Btu h kW Btu h mbar in wg l min kg h CH max 20 68 240 22 2 75 750 11 6 4 6 40 3 CH min 10 34 120 11 8 40 260 2 9 1 2 20 1 DHW max 23 78 480 25 6 87 350 15 5 6 1 46 3 DHW min 7 23 880 7 8 26 610 1 4 0 55 14 1 CH max 20 68 240 22 2 75 750 26 5 10 6 14 0 1 8 CH min 10 34 120 11 1 37 870 6 8 2 7 7 0 0 9 DHW max 23 78 480 25 6 87 350 35 14 0 16 0 2 1 DHW min 7 23 880 7 8 26 610 3 2 1 3 4 1 0 6...

Page 6: ... WATER Modulating 7 to 23 kW OUTPUT TO CENTRAL HEATING 10 to 20 kW MAXIMUM COLD SUPPLY PRESSURE 12 bar 180 psi CENTRAL HEATING CIRCUIT NOMINAL FLOW T 30 C 10 l m PRESSURE HEAD CORRESPONDING TO NOMINAL FLOW 0 2 bar CENTRAL HEATING FLOW TEMPERATURE 45 C 90 C MAXIMUM ADMISSIBLE PRIMARY WATER PRESSURE 2 65 bar DOMESTIC HOT WATER PRODUCTION WATER FLOW SELECTOR TURNED COMPLETELY TO THE RIGHT TEMPERATURE...

Page 7: ...ns given in BS 5440 2 this appliance may be fitted in a compartment with no vents as long as the minimum clearances stated in Section 6 Air Supply are maintained 4 7 The airing space must be separated from the boiler space by a perforated non combustible partition Expanded metal or rigid wire mesh is acceptable provided that the major dimension is less than 13mm See BS 6798 1987 4 8 No combustible...

Page 8: ...nifold 43 Central heating flow 45 Gas Inlet 47 Central heating return 101 Boiler cabinet 102 Flame viewing hole 103 Facia 114 Sanitary Hot and Cold 320 Appliance mounting bracket 341 Nut and olive 22mm compression 342 Nut and olive 15mm compression 343 Gas cock 401 Fibre Washer 402 Adapter 403 Nut ...

Page 9: ...r balcony level 300 mm 12 in From a surface facing a terminal 600 mm 24 in A B C D E F G H TERMINAL POSITION MIN DISTANCE I From a terminal facing a terminal 1200 mm 47 in J From an opening in a car port e g door window into dwelling 1200 mm 47 in K Vertically from a terminal on the same wall 150 mm 6 in L Horizontally from a terminal on the same wall 300 mm 12 in M From door window or air vent ac...

Page 10: ... circulation an extra expansion vessel is required 7 Sealed Primary Systems See Figs 5 and 6 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 sealed system must only be filled by a competent person using one of the approved methods shown in figure 6 The syste...

Page 11: ...11 Fig 7 System filling and make up ...

Page 12: ...equirements and if necessary reference should be made to the local Water Company before fitting the appliance 8 2 MAINS COLD WATER INLET Devices capable of preventing the flow of expansion water must not be fitted unless separate arrangements have been made 8 3 The final 600mm of the mains cold water connection to the appliance should be made in copper tube only 8 4 The appliance is suitable for a...

Page 13: ...int for the casing Earth connection point for the electrical mains connection ionization current testing point Fig 10 2 Flue temperature limiter 18 Circulation pump 32 Flame sensor 36 Primary temperature sensor NTC 61 Reset button Indicator Light 84 3 way diverter valve 96 Water flow sensor micro switch 135 Master switch 136 Central heating temperature adjustment 151 Fuse T2 5A 250V 153 Transforme...

Page 14: ...ition to the flue turret The flue turret can be replaced by a flue bend with no reduction in flue length Flue components 1 Adapter boiler to turret 2 Adapter item 1 to vertical flue 3 Flue Turret 4 Standard air duct 5 Standard flue duct 6 Restrictor rings 4 off Fan inlet 7 Flue terminal 8 Extension air duct 9 Extension flue duct 10 In line flue elbows 45 and 90 IMPORTANT To ensure the correct oper...

Page 15: ...treated in accordance with the recommendations of BS 7593 1992 A gas cock is supplied but not located on the manifold therefore the final gas connection can only be made after the appliance has been mounted on the wall see fig 3 Brush off any dust or dirt from the valves Lift the appliance onto the top mounting plate and the lower pre plumbing manifold Make up the water connections ensuring that t...

Page 16: ...ot be necessary to cut the extension ducts 0 88m to 1 10m 1 63m to 1 85m or 2 38m to 2 5m Each extension duct must be connected to the first section of flue or the previous extension duct by firstly fitting the inner flue ducts together and pilot drilling and fixing see fig 19 Then the outer air ducts can be similarly fixed using the pair of screws provided The flue terminal section can then be te...

Page 17: ...er with the socket on the appliance slide or twist the turret into the boiler flue connection as described in section 10 4 preceding together with the appropriate restrictor ring 1 Adapter boiler to turret 2 Adapter item 1 to vertical flue Rubber sealing gasket Flue terminal Clamping ring 1 Flue centering ring 2 Air duct 3 Flue duct 1 3 2 4 5 4 Rubber sealing gasket 5 Flue terminal 10 6 FLUE BENDS...

Page 18: ...s must pass through the appropriate space in the control panel and be fixed with the cable clamps provided Refit the control panel cover Test the gas supply pipework up to the appliance for soundness as indicated in BS 6891 Refer to Section 11 for a full description of the filling venting and the pressurising of the system If the appliance is not to be commissioned immediately replace the cabinet ...

Page 19: ...ts Set the Operating Switch to OFF and the burner will go out 11 5 COMPLETION OF COMMISSIONING Disconnect the pressure gauge and tighten the test point screw Restart the appliance and check for gas soundness around the test point screw Refit the cabinet casing 11 Commissioning The Appliance 11 1 SUMMARY Domestic Hot Water System Check that the mains water supply has been fully flushed out at insta...

Page 20: ...cover from the gas setting screw 2 Unscrew the throttle screw no 1 fig 25 and connect the pressure gauge 3 Open the gas tap and switch on the appliance 4 Set the temperature selector to position 7 no 3 fig 25 5 Gauge the burner pressure for the required power taking into consideration the model type see Table 4 Adjust burner pressure using the gas setting screw no 2 fig 25 Turning clockwise lowers...

Page 21: ...on 7 outflow temperature of heating system up to 90 C Turn the main switch to to the left The timer will only work for 70 hours in the case of electricity failure read timer s operating instructions Turning the water flow selector anti clockwise will increase the flow and reduce the water temperature Turning the water flow selector clockwise will reduce the flow and increase temperature G766_152 I...

Page 22: ...g screws and slide off the top cover plate Cover the gas supply to burner orifice Inspect the finned copper heat exchanger and clean as necessary using a soft brush Re assemble the appliance in the reverse order 13 5 TEST THE APPLIANCE On completion of the service and reassembly of the appliance check for gas soundness and the correct operation of the appliance as described in Section 11 Commissio...

Page 23: ...connections on the flow and return pipe tails to the heat exchanger Slacken and lower the two locking nuts retaining the heat exchanger to the inner casing base Remove the two screws from the heat exchanger top retaining plate and remove the plate Lift up the heat exchanger and remove forwards Remove the limit stat electrical connections located at the top RH side of the heat exchanger Undo the sc...

Page 24: ...ated approximately midway up on the vertical gas inlet pipe and remove the gas valve and inlet pipe as a unit Unplug the electrical connection from the valve solenoid Fit the replacement valve in the reverse order ensuring that the face to face joint are located correctly Following the replacement of all the associated parts open the valves and fill and re pressurise the system as described in Sec...

Page 25: ...Disconnect the mains input cable from the screw terminals and pull off the earth lead from the spade terminal and pull away the cable locking clamp from the base Any other external control wiring should be removed in a similar manner Pull off the two edge connectors for the fan and pump supplies also the earth leads from the spade terminals and release the cable clamp Pull off the ignition leads f...

Page 26: ...Exchanger 8 705 406 203 10 Automatic Air Vent 8 718 505 028 11 System Pressure Gauge 8 717 208 047 12 Thermometer 8 717 208 027 13 Pressure Relief Valve 8 717 401 022 14 Circulating Pump 8 717 204 192 15 Expansion Vessel 8 705 407 001 16 Diverter Valve 8 708 505 014 17 DHW Flow Regulator Valve 8 707 002 628 18 Micro switch assembly 8 707 200 007 19 Domestic Water Filter 8 700 507 001 20 Fan 8 707 ...

Page 27: ...27 Fig 27 ...

Page 28: ...owing table 9 Turn on the gas service cock and electrical supply 10 Confirm for gas soundness turn on a hot water tap for maximum hot water output check all the gas connection points 11 Readjust the burner gas pressure for the new gas type according to the values in table 4 When this is done seal the adjusting screw with the wire and lead seal 12 Fix the sticker next to the data plate 13 Remount s...

Page 29: ...y 4 seconds Pressure sensing tube not connected to air pressure switch Re connect Air pressure sensing tube kinked Re align tube Damaged pressure sensing tube Replace as required Wiring to air pressure switch damaged or incorrectly connected check connections or if damaged replace wiring Flue ducts are to long Check design of flue system and revise layout of system as required Incorrect restrictor...

Page 30: ...30 19 Functional Flow Diagrams ...

Page 31: ...31 ...

Page 32: ...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 Sale a copy of which may be obtained on application 6 720 605 553 PT 2000 11 ...

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