IFD 258 · Edition 03.12l
28
44
ซ
.
บรมราชชนนี
70
ถ
.
บรมราชชนนี
ศาลาธรรมสพน์
ทวีวัฒนา
กทม
. 10170.
โทร
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Line ID: @add11 e-mail: [email protected]
7 .3 Purge
In the case of multiple burner applications, burners
with forced air supply are used. The air for combustion
and pre-purge is supplied by a central fan controlled
by a separate logic. This logic determines the purging
time and controls an external relay that switches the air
valve to purge.
The automatic burner control unit must not be activat-
ed during purging. This is achieved by interrupting the
safety interlock, amongst other methods.
7 .4 Emergency stop in the event of fire or
electric shock
If there is a risk of fire, electric shock or similar, inputs
L1, N and 3 (start-up/safety interlock signal) of the IFD
should be disconnected from the electrical power sup-
ply.
Important!
This should be reflected in the wiring on
site!
7 .5 Emergency stop triggered by safety
interlock
The safety interlock turns off the power to the input 3
(start-up/safety interlock signal), such as in the event of
air deficiency or similar.
7 .6 Overload protection
To protect the unit against overload by frequent cycling,
only a specific number of start-up attempts can be car-
ried out by the IFD. The maximum number of start-up
attempts per minute depends on the safety time t
SA
and the ignition unit.
t
SA
[s]
t
Z
[s]
Type of ignition
Cycle lock
[s]
3
1.8
External TZI
10
5
3
External TZI
12
10
6
External TZI
15
3
1.8
IFD..I
36
5
3
IFD..I
60
10
6
IFD..I
120
If too many start-up attempts are made,
flashes on
the display to indicate a fault.
13
14
5
GIK..B
VAS
BIO/
BIC
VR..R
N
11
10
Purge