Dryer Furnace - Mepu K-SERIES Operating Manual

5.6 Dryer furnace

Deployment
The furnace installed on the mobile dryer is ready for use, after the on-site electrical and oil circuit
connections have been made. Before starting the drying mode, check the following furnace parts:
 Check that the oil hoses are connected correctly (the arrow on the filter and the pump
indicate the suction and return sides).
 Check that the oil filter is upright.
 Check that the explosion hatch and the soot hatch are closed.
 Check that the smokestack is compliant with the requirements and is tightly fastened to the
dryer.
The economy of the drying process can be significantly affected by two furnace related aspects:
Therefore, before commissioning the dryer, read the furnace operating and maintenance manual
carefully. The furnace settings must always be checked with the furnace installer in order to ensure
clean burning and low oil consumption. The warranty is valid, provided that the burner is serviced
annually by a professional.
Burners and nozzles
The nozzle capacities shown in the table are intended for 10 bar oil pressure. The nozzle capacities
can be reduced below the values shown in the table, if necessary. The 1 and 2 stage ratios can also
be modified, but the total capacity of the nozzles must not be exceeded.
Furnace Burner
type
210 Oilon KP 26
210 Oilon KP 26 H
250 Oilon KP 26 H
300 Oilon KP 26 H
400 Oilon KP 50 H
500 Oilon KP 50 H
The nozzle spray angle must be 80 degrees. Exceeding these nozzle capacities cause the
warranty to become void.
Furnace temperature settings
If the drying air temperature rises above the set value of the burner thermostat, the burner shall stop
and will restart when the temperature has dropped by 2–4
If the furnace is equipped with a 2 stage burner (KP 26 H or KP 50 H), the thermostat has two
settings, one for 1 stage and the other – for 2 stage. In this case note that the setting for the 1 stage
has to be higher than the setting for the 2 stage. The idea is that the burner should never switch off
during the drying process; instead the 2 stage should compensate the variations of the outdoor
temperature. If the outdoor temperature drops, the 2 flame shall burn for longer intervals, while rise
of the outdoor temperature reduces the need for the 2 flame.
The setting value of the overheat thermostat is a bit higher than that of the burner thermostat, and it
makes sure that the temperature of the furnace does not rise too high. If the dryer is stopped in the
middle of the drying process, the fan thermostat stops the furnace fan only after the furnace
temperature has dropped below the temperature value set for the fan thermostat.
17
Max Nozzle size I
power stage
[kg/h]
19 4 gal 80°
19 3.5 gal 80°
23 4 gal 80°
29 5 gal 80°
38 6 gal 80°
48 8.5 gal 80°
Nozzle size Nozzle
II stage kg/h
14.2
1.5 gal 80° 12.9 + 5.84=18.8
2 gal 80° 14.2 + 7.4=21.6
2 gal 80° 18.5 + 7.4=25.9
3 gal 80° 23.4 + 11.6=35
4 gal 80° 33.1 +14.2=47.3
o
C.
power Flame plate
setting
[mm]
46
42
43
50
2.7
4.6
D00125-2019_EN