User manual SAUNIER DUVAL COMBITEK F 23 E 06-98

[. . . ] COMBITEK F 23 E Installation and Servicing Instructions IN WARRANTY TECHNICAL HELPLINE 01773 828400 THIS IS A CAT II2H3+ APPLIANCE 01773 828100 1 INSTALLATION AND SERVICING INSTRUCTIONS COMBITEK F 23 E Note: The boiler serial number is marked on the data label attached to the PCB housing behind the front lower section. Refer to the `Introduction' section for a description of the basic functions of the boiler. The `User' section describes how to safely operate the boiler. Users' Instructions Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 Controls and lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · Unscrew and remove locking nut from both main gas connection and burner pressure tapping point. · Lift front edge of burner until tapping point and gas supply connection are free. Remove burner from boiler taking care to retain both fibre washers and seal on gas supply for use on reassembly. Diagram 19 · Unscrew and remove two injector bar retaining screws and separate injector bar from burner. Heat exchanger · After removal of burner, examine heat exchanger for any blockages or build up of deposits. Important: Take care not to scratch or otherwise damage painted surface of heat exchanger. Reassembly of parts removed for servicing · Replace all parts in reverse order to removal. Flue system · Check externally to make sure flue is not blocked. Operation of fan · Switch on electrical supply and turn on gas. · Without upper front panel in place, burner should be prevented from lighting by air flow detection system. · Check that fan runs when burner is lit and stops when it goes out. Cold water inlet filter · Drain down hot water circuit of boiler as follows: · Close isolating valve on cold water inlet connection, see diagram 5. · Undo connecting nut from cold water inlet connection to gain access to filter. · Remove restrictor, then filter from cold water inlet connection. · With both flow restrictor and filter in place, reconnect pipe to inlet connection and tighten. · Fully open isolating cock on cold water inlet connection and check for leaks. Operation of water valve · With the Summer/Winter control in the 'Summer' position, slowly open a convenient tap until boiler lights. · Measure water flow, it should not be greater than 3, 5 litres/minute. · Replace all outer panels. 15 Des 047 SERVICING INSTRUCTIONS REPLACEMENT OF PARTS To replace microswitch assembly · Disconnect microswitch by pulling off plug. · Undo two screws securing microswitch assembly to reversing valve assembly, see diagram 20. · Fit replacement microswitch assembly in reverse order to removal. · Reconnect plug and refit external controls connection to bracket. To replace fan · Disconnect power supply and earth leads to fan. [. . . ] · Unscrew and remove two screws holding timeclock to lower control panel. · Fit replacement timeclock in reverse order to removal. 21 SERVICING INSTRUCTIONS SCHEMATIC WIRING DIAGRAM FA EV1 14. 9 FL 14. 8 Pr 14. 6 14. 5 14. 4 K4 14. 3 14. 7 14. 2 14. 1 EV2 13. 4 13. 1 13. 3 12. 2 12. 1 Ex L 13. 2 CN 7 8. 2 8. 1 6. 13 6. 14 6. 11 6. 15 6. 12 6. 9 6. 8 6. 6 6. 4 6. 2 6. 3 2. 2 2. 1 9. 1 9. 2 8. 4 8. 3 TRA EV3 TA Ra K5 SW3 CTN Diagram 29 22 Sch 242 IG P SW3 K4 K5 EV1 TA CTN - ON/OFF switch Pump Microswitch Hight limit thermostat Loss of water switch Gas valve modulating coil Room thermostat (if fitted) Boiler thermistor P EV AL FA FL TRA Pr EX - Gas valve Ignition unit Ignition electrode Flame sense electrode Transformer Air pressure switch Fan Time clock N Al P SERVICING INSTRUCTIONS FAULT FINDING Prior to fault finding, check : Inlet gas pressure = 20 mbar Electrical supply = 240 V - 50 Hz Central heating system is pressurised at 1 - 1, 5 bar. Overheat thermostat on RHS of heat exchanger has not tripped reset if necessary. earth continuity, resistance to earth, short circuit and polarity with a suitable meter. [. . . ]