Installation and dismantling of fan impeller in Duobloc burners
dreizler A 3001 E - 18.12.2015 | A 2028 - 1.09 | EN - 15.06.2009
115
34 Installation and dismantling of fan impeller in Duobloc burners
marathon
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burner model Duobloc of series M..., M...ARZ and MC... are equipped with a fan impeller with
locking bush (taper lock).
34.1 Dismantling the fan impeller
Turn the main switch OFF.
Remove the outlet grid on the air box.
Disconnect the low-pressure line at the air box and remove the box.
NOTICE:
In models with suction-side air dampers, the electric connection of the servomotor must be disconnected
as well as the low-pressure line. Then the air damper, suction grating and the air box can be removed from
the fan housing completely.
Apply markings on the flange and clamp ring of the injection nozzle, so that they can later be re-mount-
ed in their original position.
Remove both clamp ring and injection nozzle.
a) The fan impeller has a hub with cylindrical bore:
Use an extractor to remove the fan impeller from the shaft.
b) The fan impeller is equipped with a clamping hub:
see section below 34.3 "Dismantling the taper lock bush".
34.2 Mounting the fan impeller
The fan impeller can be mounted on the shaft in two different ways:
a) The fan impeller has a hub with cylindrical bore:
Mount the fan impeller by way of the cap screw on the motor shaft
b) The fan impeller is equipped with a clamping hub:
see section below 34.4 "Mounting the taper lock bush".
Mount the fan impeller on the motor shaft.
Use the clamp ring to centre the injection nozzle.
Turn the fan impeller by hand to check for unimpeded running.
There should not be any grinding noises.
Remount the air box, the suction grating and the low-pressure line.
NOTICE:
The following installation measurements must be observed for fan impellers with taper lock bushes:
43mm from the front edge of the motor shaft to the taper lock bush
27mm from the front edge of the motor shaft to the taper lock bush in burner type 10001.4 with 45kW
motor capacity.