Valor Fires 756 Installer And Owner Manual

11.3 Preliminary burner checks.Some burner operations can be checked at this stage. Checking now will mean thatless disassembly will be required if any problems are found. A full check should stillbe made, however, after final installation.11.3.1 Lighting the fire.If closed , open the isolating ‘T’ connector valve. Depress the control knob and rotate itSLOWLY anticlockwise to the PILOT/IGN position. A ‘click’ will be heard as theintegral piezo operates. A spark should be seen between the electrode and pilot tip.Turn the control knob clockwise to the OFF position. Repeat this operation until aflame appears at the pilot. There may be a delay before the pilot lights due to airbeing purged from the system. When a flame appears at the pilot keep the controlknob depressed and hold the pilot ignition position for five seconds. When the controlknob is released the pilot flame should remain lit.If there are no sparks check that the electrode lead is connected to the electrode tag.11.3.2 Operating the burner.When the pilot burner is operating properly, gradually turn the control knob anti-clockwise to ‘HIGH’ (Depress the knob slightly to get past the PILOT/IGN position).The main burner should now light. Depress the control knob slightly to release fromthe ‘HIGH’ position and turn back (clockwise) to ‘LOW’. While turning, the burnerflames should gradually become lower but remain alight. Depress the control knobslightly to release from the ‘LOW’ position and turn back (clockwise) to thePILOT/IGN position. The main burner should extinguish but the pilot should remainalight. Depress the control knob slightly and turn back (clockwise) to turn OFF.This will extinguish the pilot.11.4 Check inlet pressure.The appliance is pre-set to give the correct heat inputat the inlet pressure shown in section 3 of this manual.No adjustment is necessary.1. Check the inlet pressure by fitting a pressure gaugeat the test point. The test point is on the inlet ‘T’connector (See figure 25). Check the pressure with theappliance alight and set at maximum output.2. After checking, turn off the appliance. Remove thepressure gauge and replace the test point sealingscrew.3. Test around the sealing screw for gas soundnesswith a suitable leak detection fluid.Page 27© Baxi Heating U.K. Limited 2010.Figure 25. Pressure test pointINSTALLER GUIDE