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Pump switch in position III (pre-delivery setting) Pump switch in position II 1000 1100 1200 1300 1400 1500 1600 1700 Volume flow [l/min] An automatic system by-pass is included within the boiler. The boiler is suitable for use in systems with thermostatic radiator valves and no additional by-pass is required.
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Check electrical supply, appliance fuses and on/off control Sheet A Ensure boiler main Is there a display on ON/OFF control is set Go to sheet C the LCD Panel? to position "1" Boiler ON/OFF control defective, Is 230VAC present across Repair external fault change electronic terminals L and N?
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Check operation of pump and fan Sheet B Turn off the main ON/OFF control to the "0" position Disconnect the power supply to the boiler Replace fuse F1 Turn the main ON/OFF control to the "1" position Check transformer 230 VAC primary (black/red) and approx.
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Check central heating and controls Sheet C Ensure that radiator temperature control knob is set to vertical position and that any internal timer (if fitted) is calling for heat Check diagnostic code D.08 (see page Does failure code show on LCD display? Go to sheet D 39).
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Check flue and ignition system Sheet D Does the boiler Are electrodes sparking at Does fan run after approx. 30 secs.? Go to sheet E commence ignition the burner? Check electrodes and Check status code Check diagnostic code D.24 electrode leads. (see page 39) equal 1? (see page 38) is S.33? Replace as necessary.
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Check gas valve and central heating system pressure Sheet E Does burner light 1st Is burner indicator Does burner shut down after Go to sheet F attempt? illuminated? approx. 15 secs. Check flame Does burner light within 3 Reset boiler rectification lead and Does status code (see page 38) ignition attempts?
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Check operation of burner and modulation Sheet F Does burner flame modulate/ go Does flame indicator glow and out when radiator temperature Does heating flow pipe flames increase in size to full gas control is turned left to the Go to sheet G temperature rise? rate after approx.
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Check D.H.W operation Sheet G Check hot water flow rate and temperature. Does flow indicator (tap) Compare with technical data, if flow is not Draw hot water at high rate on display light up? sufficient, check incoming main and cold water filter.
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CONTROL BOX MAIN SWITCH Central heating demand indicator Burner lock out indicator Ignition indicator MAIN Hot water TRANSFORMER demand indicator Hot water demand indicator 230V POWER SUPPLY F1,25A MAIN SWITCHBOARD PRESSURE plug in connector SWITCH plus / minus buttons reset button PUMP PUMP info button...