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Control programme
t
5s
Putting control circuit under atmospheric pressure
4
t
7,5s
Time between start-up and energizing of main "AR" relay
6
t
22,5s 1st verification stage at atmospheric pressure
1
t
5s
Putting control circuit gas under pressure
3
t
27,5s 2nd verification stage at gas pressure
2
t
67,5s Total time of tightness control, up to burner operation consent
5
t
22,5s Return of programmer to rest position = fresh verification is enabled
20
Course of programme
LDU 11.. GAS VALVE TIGHTNESS CONTROL EQUIPMENT
AL
remote alarm signalling
AR
main relay with "ar" contacts
AS
equipment fuse
BR
blocking relay with "ar" contacts
DW
outer pressure switch (tightness control)
EK... unblocking button
GP
outer pressure switch (for mains gas pressure)
HR
auxiliary relay with "ar" contacts
L1
equipment trouble signalling lamp
SK
line switch
I...XI
programmer cam contacts
39
Terminals activated by
equipment or by electric
connections
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