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Manafacture: Burnham File size: 1.18 mb File name: 46886102-3290-49b7-b8d3-4fa4177c6fdc.pdf Language of manual:

1001 8.0 COMMISSIONING AND TESTING 8.1 Filling the Central Heating System Burner pressure test point Automatic air vent Vent cap Heat exchanger vent Pump C.H. pressure relief valveGas inlet pressure C.H. pressure gauge test point D.H.W. drain point Low water pressure switch Fig. 20 Remove the top front panel by gripping both sides and lifting forward away from main boiler assembly. Loosen the cap of the automatic air vent (fig. 20) and leave it loose. Open the central heating flow and return cocks (fig. 11). Gradually fill the system as detailed in Make up Water. While filling, vent the heat exchanger at venting point by loosening cap (fig. 20) and vent each radiator. Tighten cap on heat exchanger air vent. Ensure the working pressure, when filled, is between 1 to 1.5 bar on the pressure gauge (see technical data). Check the system for leaks. Flush system in accordance with BS 7593. 8.2 Filling the Domestic Hot Water System Close all hot water draw off points. Open main cold water stop cock and ensure the cold water inlet cock is open at the boiler jig bracket (fig. 11). Slowly open each hot tap in turn until clean water, free from air pockets, is seen. Check system for leaks. 8.3 Electricity Supply Carry out preliminary checks (i.e. earth continuity, polarily short circuit and resistance to earth using a suitable multimeter). 8.4 The Gas Installation The whole of the gas installation including the meter, should be inspected and tested for soundness, and purged in accordance with the recommendations of BS6891-1988. 1001 20 8.5 To Light the Boiler (fig. 21) a. Open controls panel door. b. Switch on electricity supply. c. Adjust room thermostat and all external controls to «ON». Check operation of pump. d. Turn the boiler thermostat to maximum. Fan will run (A waiting time of max 3 minutes before fan will run is possible!), and main burner will light. e. Temporarily turn off by switching off electricity supply. Important Note: If the burner stops for C.H. only after a waiting time of 3 minutes will the boiler light again! fig. 21 P+ - PAUTO R OVERRIDE 12:31 x x4 AUTO Flame viewing opening C.H. pressure C.H. boiler gauge thermostat Fault diagnostic lights Domestic hot water thermostat Time clock (if fitted) Flame failure reset knob C.H./D.H.W. selector switch 1001 Burner Pressure C.H. and D.H.W. 8.6 To Range Rate the Boiler C.H. (not required for standard installations). The boiler can be range rated for an output from 11.8 kW up to 27.9 kW. When the boiler is supplied it is factory set at the maximum output 27.9 kW. Procedure a. Release the control panel fixing screws (fig. 30) and lower panel. b. Loosen the screw in the burner pressure test point (fig. 22) and attach a gauge. c. Switch on the electricity supply to relight the main burner. Note 1 -Modulation is available on central heating, so the procedures must be carried out while the system is relatively cold. Recheck boiler thermostat is set to maximum. d. Adjust the potentiometer P1 on the PCB (fig. 24) in the control panel until the required burner pressure is obtained (Anticlockwise to reduce the pressure). Note 2 -The range of inputs with corresponding burner pressure is given on the Data badge which is situated behind the top front panel. Further informations is on (fig. 23). e. With the pressure set, turn off the electrical supply and mark the set input on the Data badge (with sticker supplied). Burner Pressure C.H. and D.H.W. P1 =C.H. range rating to be set on site P2 =D.H.W. temperature (factory set, not to be adjusted) P1 Adjust with screwdriver! Fig. 22 Balance tube Modureg Gas valve Test point burner pressure Gas inlet pressure test point 12 1 TR1 X4 X6 234 X2 RY1 X1 2AT 230V 50Hz 1 11 10 7 26 3512 910 12 P1 X3 6 5 3 4 1 F1 9 87654321 X8 123456789 X5 12 X7 JP4 13 L7 RY2 RY4 JP1 P2 P2P1MINMAXMINMAX Pressure Minimum Maximum settings mbar mbar Natural Gas 3.0 15.0 L.P.G. 6.9 34.5 Fig. 23 1001 Honeywell VR 4605 NA 4003 valve with V7335A4014 Modureg Gas pressure Adjustment 1 -With the burner lit: 2 -Connect suitable pressure gauge to burner test point "B", and then: 3 -Disconnect air pressure compensation tube "H"; 4 -Disconnect the wires from coil "C" of the Modureg; 5 -Remove protective cover "D"; 6 -Remove coil "C" by opening the coupling spring "I"; 7 -Screw the minimum adjustment screw "E" up tightly. (clockwise) 8 -Unscrew lock nut "F" on sleeve "G"; 9 crease pressure and anticlockwise to reduce pressure; 10 required value; 11 -Adjust minimum pressure by rotating screw "E" anticlockwise until the required value is reached; 12 -Fit coil "C" by sliding it into the sleeve, pushing I and rotating it lightly until the coupling spring "I" clicks into place; 13 -Shut down and ignite the burner, checking that the minimum pressure value is stable; 14 -Reconnect the wires to coil "C" of the Modureg; 15 -Reconnect air pressure compensation tube "H"; 16 -Replace protective cover "D"; 17 -Turn burner off, remove pressure gauge, close and test, test point;...

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