Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Con-<br />
dition<br />
DELTABOOSTER_GB01<br />
B4<br />
By-pass<br />
switch<br />
Pump<br />
operation<br />
B2<br />
Pres.<br />
( low)<br />
Function<br />
The diagram illustrates the various situations that theoretically may arise.<br />
B1<br />
Pres.<br />
( high)<br />
0 0 0 0 0<br />
Status<br />
Start<br />
signal<br />
Delay<br />
Sec.<br />
Function<br />
0 , 1 Manual<br />
start<br />
pump<br />
1 0 1 0 1 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
2 0 1 1 0<br />
3 0 1 1 1<br />
Consump-<br />
tion<br />
Consump-<br />
tion<br />
2 Start<br />
pumps<br />
15Operationstable 4 0 1 0 0 Leakage 2 5 Stop<br />
plant<br />
( fault)<br />
5 1 0 0 0 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
6 1 0 0 1 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
7 1 0 1 0 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
8 1 0 1 1 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
9 1 1 0 1 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
10 1 1 1 0 Illegal 1 5 Stop<br />
plant<br />
( fault)<br />
111 1 1 1 By-pass 15 Stop<br />
one<br />
pump<br />
C<br />
Working Diagram<br />
As an example condition 4 illustrates: Pump operation (one or more pumps in operation).<br />
B1 and B2 are not activated, meaning that the pressure is lower than 25 bar and there is<br />
no by-passing. Thus there will be no outlet of water from the system and there must be a<br />
leakage. The plant will be stopped after 25 seconds in this condition.<br />
Condition 10 illustrates that water is by-passing, a pump is in operation and there is a<br />
system pressure of at least 25 bar. This is only possible if the overflow valve V1 is<br />
adjusted lower than B1, i.e. an illegal situation.<br />
10
Change language