FUEL CHANGEOVER PROCEDURE
Note that on completion of the commissioning procedure detailed above the burner is set for gas
firing. The procedure to be followed when switching fuels during normal operation is as follows:
Switching from Gas to Oil
1.
Switch off the burner and the electrical power supply to the burner.
2.
Close the manual gas isolation valve.
3.
Open the ball valve in the oil line.
4.
Turn the fuel selector switch on the control panel to the oil position.
5.
If the burner has been operated on gas for a prolonged period, it may be necessary to refit
the burner oil pump coupling and re-prime the pump.
6.
Establish the electrical supply to the burner and switch on the burner. Allow the burner to
proceed through its operating sequence until it is operating on high fire.
Switching from Oil to Gas
1.
Switch off the burner and the electrical power supply to the burner.
2.
Close the ball valve in the oil line.
3.
Open the manual gas isolation valve.
4.
Turn the fuel selector switch on the control panel to gas position.
5.
Establish the electrical supply to the burner and switch on the burner. Allow the burner to
proceed through its operating sequence until it is operating on high fire. If the burner has been
operating on oil for a prolonged period it may be necessary to purge the gas line of air.
6.
If the burner is to be operated with gas for a prolonged period, it may be desirable to remove the
oil pump couplings.
ROUTINE SAFETY CHECKS
THESE CHECKS SHOULD BE CARRIED OUT ONLY APPROPRIATELY QUALIFIED AND
EXPERIENCED PERSONNEL.
Combustion Air
Check that the plant room is well ventilated at all times and inspect the burner air inlet frequently to
ensure that there is no obstruction to the air flow.
Flame Detector
1. Remove the UV cell from the burner casing and cover the quartz glass envelope to exclude light.
Care should be taken not to touch the glass.
2.
Establish the electrical supply to the burner and switch on the burner. The burner should go to
lockout at the end of the ignition cycle.
3.
Switch off the burner and the electrical power supply to the burner. Replace the UV cell.
Establish the electrical supply to the burner and switch on the burner. Reset the lockout.
Valve Proving System (if fitted)
1. Introduce a gas leak by slackening the screw in the pressure test point between the main valves.
2.
Switch on the electrical supply to the burner and the burner itself. The valve proving system
should lock out through failing gas pressure as the burner runs through its start cycle.
3.
Re-tighten the screw in the pressure test point and reset the lockout button on the valve proving
system.
MDFL 3300 & MDFL 4000 Issue 2 08/08
Page 37
Содержание MDFL 3300
Страница 16: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 15 VALVE PROVING SYSTEM LDU 11 Standard fitting...
Страница 30: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 29 MODULATING CAM BOX...
Страница 43: ...Electrode Setting Details MDFL 3300 MDFL 4000 Issue 2 08 08 Page 42 All dimensions in mm...
Страница 44: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 43 Performance Envelopes MDFL 3300 and MDFL 4000 MDFL 3300 MDFL 4000...
Страница 48: ...NOTES MDFL 3300 MDFL 4000 Issue 2 08 08 Page 47...
