Basic Documentation

8.1.7 Application examples
Pump used as a frost protection pump in connection with air heating coil:
Frost protection pump
AI
3101S18
X3
x
Y
SIGNAL Y
LABEL
FRST
Pump used as a load-dependent recooling pump on a multistage refrigeration
machine:
Load-dependent
recooling pump
3101S30
V
Q1
T
X1
M
Y1
Y
X1
Y
SIGNAL Y
LABEL
TEMP
yp yp yp
x
xx
DIFF
x
Q
MAIN
LIM SEQLIM
SHIFT
1CTLOOP 1
DV ALM
SEQ2 Y SEQ2 P SEQ1 Y SEQ1 P SEQ4 Y SEQ4 P SEQ5 Y SEQ5 P
Q1
p2
PUMP 1
PUMP 1
Y1
DO
AO
1
y2
IN X
x
A0
AO 1
AI
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Siemens Universal Controllers RLU2… CE1P3101en
Building Technologies Aggregates 29.08.2008