© KWB – Kraft und Wärme aus Biomasse GmbH
IM Easyfire 10/2008
Page
61
5 Operation, factory customer service
5 Operation, factory customer service
5
OPERATION, FACTORY CUSTOMER SERVICE
5.1
Menu item – Basic Settings
5.1.1 Fan
Air:
Speed levels for the combustion air fan for the three power stages Partial load (P), Medium
load (M) and Nominal load (N)
Suction:
Speed stages for the induced draught fan for the three power stages Partial load (P), Medium
load (M) and Nominal load (N)
Switch-off delay:
Switch-off delay for the fan
Shut down:
Multiplier for the switch-off delay of the combustion air fan when switching off the burner
Switch-on delay:
Switch-on delay for the fan
The air quantities are pre-set when the system is commissioned. Thus the control system is adapted to the different
nominal boiler output levels and chimney draught conditions. It is only possible to precisely set the air quantities
with a flue gas measurement device. The fan speed is regulated in the lower output stages. There are 51 air stages
(0 - 50) available; and 0 corresponds to idle and 50 corresponds to the maximum speed.
To prevent boiler puff-back when switching down from nominal load to medium load, or from medium load to partial
load, all fans continue to run at the higher speed (switch-off delay, 180 seconds for example). When switching down
to ready status the primary fan continues to run for a multiple of this time (e.g. 3 x 180 s) to completely burn off the
fuel in the burner plate. When switching up to a higher output, the switch-up process of the fan speed is delayed
by 20 seconds (switch-on delay).
5.1.2
Boiler
output
KWB USP:
Enter the boiler size as specified on the type plate (nominal output in kW)
Nominal load,
medium load,
partial load:
Specification of the push-in power in kW (precise specification only with exact adjustment
of the pellet factor) for the different output stages. Partial load should not exceed 30 % of
nominal load. If these settings are changed then the air stages of the fans must be adapted
to the changed settings.
5.1.3
Ignition
Feeding:
Time for filling the burner with pellets
Heating:
Maximum runtime of the electrical heater in the ignition lance
Complete ignition:
Time until the fuel bed is completely formed
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MA-Easyfire 10.2008_EN.indd 61
30.03.2009 13:30:09 Uhr
30.03.2009 13:30:09 Uhr
