ELECTRICAL POWER SUPPLY
A 400 Volt, three-phase, 50Hz supply is required. Power requirements are listed in the table below.
The power supply provided must comply with all relevant Codes and Standards.
BURNER
Fan Motor
kW/hp
Pump Motor
kW/hp
Start Current
A/Phase
FLC
A/Phase
Cable Size
(mm
2
)
HRC Fuse
(A)
MDFL 3300-36
7.5 / 10.0
1.5 / 2.0
101.3
17.3
4.0
40
MDFL 3300-41
11.0 / 15.0
1.5 / 2.0
97.0
25.3
6.0
40
MDFL 4000-36
11.0 / 15.0
1.5 / 2.0
97.0
25.3
6.0
40
MDFL 4000-41
11.0 / 15.0
1.5 / 2.0
97.0
25.3
6.0
40
MDFL 4000-44
15.0 / 20.0
1.5 / 2.0
123.6
32.9
10.0
50
Note: 7.5 kW burner fan motors are started D.O.L.
Above 7.5 kW Star/Delta starters are fitted.
OIL SUPPLY
The oil supply pipework to the burner must be appropriate to local conditions and must be
constructed and installed in compliance with appropriate Codes and Standards. It shall be of
sufficient size to satisfy the pressure and flow requirements of the burner under all firing conditions.
Checks should be made to ensure that all meters and other components are appropriately rated for
the maximum oil flow rate anticipated. Galvanised steel pipe should not be used. The supply
pipework should include an appropriate filter. The final connection to the oil pump inlet port should be
made using the flexible pipes supplied with the burner.
MDFL burners may employ a pumped ring main or a gravity feed oil supply system.
Where a gravity feed system is used it should be designed and sized such that the oil pressure at the
pump inlet is not less than 350 mbar and not more than 689 mbar. When a two-pipe system is used,
it is important to ensure that the return pipe is not obstructed as this may result in damage to the
pump.
Where it is thought desirable, a pumped ring main (refer to schematic diagram on page 8) of
appropriate capacity may be used for MDFL burners. The capacity of the ring main pump should be
at least 1.25 times that of the burner pump(s) that it is required to supply.
OIL HANDLING TEMPERATURES AND PRESSURES
Fuel Handling Temperatures (°C)
Fuel Delivery Pressures
(At Inlet to Burner Oil Pump)
Fuel Class
Viscosity
(Seconds)
Minimum
From Tank
Burner
Inlet
Atomising
kg/cm
2
psi
D
35
Minimum 5 recommended
0.35 to 0.70
5.0 to 10.0
MDFL 3300 & MDFL 4000 Issue 2 08/08
Page 7
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...
