MANUAL
HK2 – HK4 25-08-2014
Page
29
3.12
Controller function explanation
Boiler start:
Short press (< 2 sec):
Fire-up function activated; the fan runs at high speed (r2) until the flue gas temperature reaches the minimum flue gas
temperature (n6) or till the fire-up time (r1) has elapsed; hereafter the fan speed reduces to the max rotation speed (n0).
Pressing Stop button will stop the fan if and only if the flue gas temperature is below (n6).
The boiler symbol is blinking until the boiler has reached normal operation.
The LED is blinking
green
until activation of the normal operation mode.
Long press (> 2 sec):
Refill function activated; the fan runs at high speed (r2) for
5 minutes
(fixed value).
NB: The refill function can only be activated if and only if the fan is already running and only if the fire-up function is
not activated.
The wood log symbol in the upper left corner of the display shows for as long as the Refill function is active.
Pressing the Stop button will deactivate the high speed (the wood log symbol will switch off); hereafter the fan speed will
continue at normal maximum speed (n0).
Pressing Stop button once more will stop the fan if and only if the flue gas temperature is below (n6).
The LED is blinking
green
if:
•
Refill active, i.e. until the 5 minutes has passed.
•
the Refill function has been stopped and the flue gas temperature < (n6+r0)
Operation:
Shifting to normal operation:
When the flue gas temperature comes above (n6) + (r0) the controller shifts to normal operation. First after reaching this
state, the fan will be able to stop again if the flue gas temperature decreases below minimum flue gas temperature (n6).
During normal operation, the speed of the fan maintains at max rotation (n0). Only if the boiler temperature rises above
the boiler temperature set point (preset boiler temperature) the fan speed reduces linearly towards min rotation speed
(n1) until the boiler temperature comes above (preset boiler tempe P5 (under code 804)). If the boiler
temperature comes above this temperature the fan stops. The fan will only start again if the boiler temperature comes
below (preset boiler temperature – boiler temperature hysteresis (n3)).
During normal operation, the LED lights constant
green
.
During period with reduced fan speed, the LED lights constant
orange
.
If the fan stops because of high boiler temperature, the LED lights blinks
red
during this period.
IMPORTANT
: As the flue gas temperature has come above the minimum flue gas temperature (n6), it is no longer
possible to stop the process using the STOP button.
Burning down:
Shifting to burning down period:
As the flue gas temperature during normal operation comes below (n6), the function shifts to the burning down function.
For the period “Detection time out of fuel” (n4) the fan continues to run.
Setting the parameter (n4) to zero (0) will stop the fan stops as the minimum flue gas temperature reaches (n6).
The LED is blinking
orange
during the burning down period.
Pressing the Stop button will stop the Burning down function, i.e. the fan stops, and the controller goes to the Finished
operation mode.
Finished operation:
As the burning down period has elapsed, the fan stops.
The pump continues to run for the time (n9) – if and only if the boiler temperature is above (n2).
The LED is OFF (no light)
Summary of Contents for HK2
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