COMMISSIONING : OIL
Burner Dry Run – MDFL 3300 & MDFL 4000
The following procedure should be followed. It is important that a complete and flawless dry run be
completed before fuel is supplied to the system:
1.
Check that the gas, oil and electrical supplies to the burner are turned off. Turn the fuel selector
switch on the control panel to the oil position.
2.
Check that the manual gas isolation valve at the inlet to the gas train is closed. Do not close the
ball valve at the outlet of the oil pumping set.
3.
Ensure that oil is available at the oil pump on the burner at the required pressure and class.
4.
Prime the oil pump by opening the bleed port until air-free oil flows from it. The pump should
not be rotated automatically until is has been primed as this may lead to premature wear or
pump failure.
5.
Switch on the electricity supply to the burner and check that the pump rotation is correct to the
direction arrows shown on the pump face.
6.
Open the manual isolation valve at the outlet of the pumping set.
7.
Open the control panel door and set the burner for low flame hold.
8.
Set the air pressure switch to minimum.
9.
Remove the access lid on the modulating cam box unit.
10. Switch on the burner at the control panel. The modulating unit cam shaft should now rotate to
the high flame setting, and the combustion fan motor will start the air pre-purge phase.
11. Allow the fan motor to run up to speed and switch off the burner. Observe the rotation of the
combustion air fan motor, which should be anti-clockwise viewed from the motor cowl end. If
the direction of rotation of the fan motor is incorrect, refer to the Section of this handbook on
Fault Finding.
12. If the fan rotation is correct switch on the burner.
13. The burner will proceed through its pre-purge and ignition sequences. Check that an ignition
spark is present. If there is no spark and the burner goes to lockout, the air pressure switch
may be at fault – refer to Section on Fault Finding.
14. During this run note the spill and line oil pressures at the point of ignition. Reset the sequence
control and repeat the run if necessary to check these functions. If necessary, adjust the line
pressure at the burner pump to 27.8 bar (400 psi) and the spill pressures to the correct figures
stamped on the burner data plate.
15. Allow the burner to light momentarily. Remove the UV cell to lock out the burner then switch off
the electricity supply to the burner.
16. The burner’s safety systems have now been proven on oil firing and commissioning can
proceed to the next stage.
MDFL 3300 & MDFL 4000 Issue 2 08/08
Page 26
Summary of Contents for MDFL 3300
Page 16: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 15 VALVE PROVING SYSTEM LDU 11 Standard fitting...
Page 30: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 29 MODULATING CAM BOX...
Page 43: ...Electrode Setting Details MDFL 3300 MDFL 4000 Issue 2 08 08 Page 42 All dimensions in mm...
Page 48: ...NOTES MDFL 3300 MDFL 4000 Issue 2 08 08 Page 47...
