Worcester 70/90, Installation And Servicing Instructions

Page 1: ... 70 90 90 110 FLOOR STANDING OIL FIRED PRESSURE JET APPLIANCES INSTALLATION AND SERVICING INSTRUCTIONS THESE INSTRUCTIONS ARE TO BE LEFT WITH THE APPLIANCE This appliance must be installed and serviced by a competent person ...

Page 2: ...r company bye laws The Control of Pollution Oil Regulations 1 6 To ensure that the installation will perform to the highest standards the system and components should conform to those mentioned in the instructions 2 1 The Worcester Bosch range of appliances covered in these instructions have been designed to serve domestic central heating and hot water requirements ranging from 15 kW to 32 kW 51 0...

Page 3: ...e gas temperature and is for general guidance purposes only NOTE The pump pressure given is for general guidance only as variations in nozzle output can be up to 15 It is therefore essential that the air is adjusted to give the correct CO2 value NOTE The nozzle type used on 28 Sec Kerosene outputs are nozzles calibrated specifically for use with 28 Sec Kerosene which gives less variation in nozzle...

Page 4: ...t phial Burner locking screw Burner seal gasket Side panel locking screw A Burner Optional pump location Manual reset overheat thermostat Strain relief bush Burner plug in connector High limit thermostat Fire valve clip Side panel Top panel Front panel Thermostat knob Control thermostat phial Phial retaining plug Split pin ...

Page 5: ... compartment two air vents are required one at high level and one at low level The minimum free area of each vent is given in Table 6 and depends whether the air is taken from another room or from outside the building Where the air is taken from another room that room must contain an air inlet as described in 6 1 6 3 There must be sufficient clearance around the appliance to allow proper circulati...

Page 6: ...ee Fig 5 for flue terminating positions 80 min Flue guard 766 L F F K G A E B C D H J N O M Minimum Distance mm Terminal Position Open Low Level Flue Discharge A Directly below an opening air brick window etc Not allowed 600 B Horizontally to an opening air brick window etc Not allowed 600 C Below a gutter or sanitary pipe Not allowed 75 D Below eaves or a balcony Not allowed 600 E From vertical s...

Page 7: ... of a capillary type valve will allow a neat and simple installation A suitable valve is the KBB manufactured by Teddington Controls Limited A spring clip has been provided behind the electrical panel shown in Fig 2 to allow a fire valve element to be mounted Alternatively a fusible link or electrical system may be used Under no circumstances should a combination isolating fire valve be used as th...

Page 8: ...stem installation should be carried out in accordance with BS 5449 Part 1 1 Feed and Expansion System The feed and expansion pipes must rise continuously from the appliance and must be of the minimum diameter shown in Figs 8 and 9 The cistern must be arranged to provide a minimum static head of 1 metre above the top of the highest point in the heating circuit 2 Filling and Venting Air in the appli...

Page 9: ... and expansion tank N B A drain cock should be installed at the lowest point of the heating circuit Domestic hot water cylinder S H S H Fig 9 Typical Open Vent Fully Pumped System Honeywell Y plan Feed and Vent Cistern Diverting valve Boiler Pump Radiator S H Minimum static head 1m 3ft measured from the top surface of the appliance or highest point in the heating system to the water level in the f...

Page 10: ...ntrol of the central heating and hot water However it must be noted that the programmer used must be suitable for gravity feed applications when used as shown in Figs 11 and 12 such that the hot water channel is always on when the central heating channel is on otherwise the boiler will not fire when there is a central heating demand 10 5 Safety Check In the event of an electrical fault after the i...

Page 11: ...230 240V 50Hz Time clock programmer Central heating Room thermostat Circulating pump N N L E 3 Hot water 5 Amp Control box connector block Double outlet frost thermostat Mains supply 230 240V 50Hz Time clock programmer Central heating Room thermostat Cylinder thermostat Circulating pump N N L C NO NC E 3 Hot water 5 Amp ...

Page 12: ...rom the system 4 Check the boiler and all pipework connections for leaks 5 The primary system should be flushed and treated in accordance with the recommendations of BS 7593 1992 11 5 Oil supply installation See Fig 7 Note Never route the oil supply pipe hose directly below the combustion chamber base 1 Fit the oil supply pipe as described in Section 8 The pipe can be routed down either side of th...

Page 13: ...at the procedure until the burner fires and runs in a steady state This may take several attempts depending on the oil pipe length and height 12 10 Adjust the air shutter and pump pressure to the settings recommended in Tables 2 to 4 After a pre ignition period of approximately 15 seconds the burner should ignite Flame sensing is carried out by means of a photocell mounted in the burner body Shoul...

Page 14: ... PL 6 7 21 5 10 x 78 mm 5 mm 19 PL 6 7 21 5 10 x 78 mm 5 mm To adjust the nozzle position undo the locking screw located at the rear of the nozzle line and rotate the adjusting disc one turn anti clockwise to move forward by 1 mm Fig 14 Electro Oil Inter B11 Burner 70 90 Model Combustion Head Air control indicator Photocell Air adjustment screw 4 mm hexagonal head Transformer Control box Oil pump ...

Page 15: ...east once per year Worcester Heat Systems Limited will be pleased to discuss and offer a comprehensive maintenance contract 13 4 Set the system controls to the users requirements 13 Instructions To The User 15 Fig 16 Location of Boiler Flueway Baffles a 50 70 ENSURE THAT ALL BAFFLES ARE FIRMLY SEATED IN POSITION BAFFLE RETAINER BAFFLE HEATSHIELD b 70 90 and 90 110 Fig 15 Electro Oil Sterling 40 Bu...

Page 16: ...eparate the main body of the burner from the burner front by removing the M6 allen screw located beneath the air adjustment screw using a 5mm allen key c Note the position of the air damper adjustment and check the air damper moves freely d Check the air path to the burner head is clear e Clean both sides of the fan impeller and remove any debris from the burner housing f Check the impeller rotate...

Page 17: ...tions shown in Fig 16 14 6 Check that a fire valve is fitted to the incoming oil line with the body located outside the premises and the detection element located within the appliance case A fire valve clip is provided for this purpose as shown in Fig 2 test the operation of the fire valve to ensure that the mechanism operates and that the oil supply is completely isolated 14 7 Recommission the Bu...

Page 18: ...ension leads faulty Boiler does not respond to a call for heat Boiler thermostat faulty Check by linking out high limit and control thermostats Programmer open circuit Faulty control box Replace if necessary Flue draught incorrect Check flue draught Combustion settings incorrect Set up as in installation instructions Faulty nozzle Replace nozzle HIGH SMOKE NUMBER Faulty nozzle Replace nozzle Incor...

Page 19: ...19 NOTES ...

Page 20: ...earances 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 8 716 145 074f 05 01 Worcester Heat Systems Limited Cotswold Way Warndon Worcester WR4 9SW Telephone 01905 754624 Fax 01905 754619 www worcester bosch co uk ...