Elster BCU 480, Руководство пользователя

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BCU 480 · Edition 06.07
65
The default safety time during operation t
SB
in accordance with
EN 298 is 1 second. In accordance with EN 746-2, the safety
time of the installation during operation (including closing time
of the valves) may not exceed 3 seconds (see “Project planning
information”). Note the requirements of the Standards!
Flame signal 12 .6
If a flame is detected, the flame detector will supply a flame
signal.
Fault lock-out 12 .7
In the event of a fault lock-out, all valves and the ignition trans-
former are disconnected from the electrical power supply,
and a fault is signalled. Resetting must take place manually
following a fault lock-out.
Safety interlocks (Limits) 12 .8
The limiters in the safety interlock (linking of all the relevant
safety control and switching equipment for the use of the ap-
plication, e.g. safety temperature limiter, minimum/maximum
gas pressure) must isolate input from the voltage supply.
Pilot gas valve V1 12 .9
The start fuel flow rate for the pilot burner is released by pilot
gas valve V1. It opens when the safety time on start-up t
SA1
starts to elapse. It remains open until the burner is switched
off again by a normal shut-down or fault lock-out.
Main gas valve V2 12 .10
The start fuel flow rate for the main burner is released by main
gas valve V2. It opens when the safety time on start-up t
SA2
starts to elapse. It remains open until the burner is switched
off again by a normal shut-down or fault lock-out.
L1 (L1)
N (L2)
PE
1 2 PE
N N
s
s1
V1 V2 C N S M L
µC
l
N
v1 c2
88
c1
N
v2
BCU 480
V1
V2
O
I
F1 F2
230V~
max. 2 A,
253 V
I
Z
30 31 32 33 34 35 36 37
DI
50 51
l
38
F3
(BCU 480..C)
40 41 42 43 44 45 46 47
UVS
1
2
3
P
5 6 7 8 11 9 10 12 13 14 15 25 26 27 18 19 20 22 24
PE 7 8 9 10 24 25 PE 7
8
9 24
A
23
ϑ
3 4
1 ϑ 2
21
12 .11 Continuous operation
The gas burner runs continuously for more than 24 hours.
Air valve 12 .12
The air valve can be used
– for cooling,
– for purging,
– to control the burner capacity in ON/OFF mode and in
High/Low mode when using a pneumatic air/gas ratio
control system.
Glossary