BCU 580 · Edition 11.15
103
12 .5 Parameter chip card
The parameter chip card must be installed in the unit for the
BCU to operate. The parameter chip card contains the valid
parameter settings for the BCU. If a BCU is replaced, the
parameter chip card can be removed from the old unit and
inserted into the new BCU. The BCU must be disconnected
from the electrical power supply for this purpose. The valid
parameters are then adopted by the new BCU. The old device
and the new BCU must have an identical type code.
12 .6 Protecting the pilot burner from overload
To protect the unit against overload by frequent cycling, only
a specific number of pilot burner start-up attempts can be
carried out by the BCU. The maximum number of start-up
attempts per minute depends on the safety time t
SA
and the
ignition time t
Z
.
t
SA
[s]
t
Z
[s]
Cycle lock
[s]
3
2
12
5
3
13
10
6
16
If too many start-up attempts are made,
53
flashes on the
display to indicate a fault.
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