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Output configuration
Load input,
start condition
A B C D
Modulating load input with
switching command and
modulating load outputs
Number of
stages or
aggregates
4
1
Start
Run priority
changeover
(Example 3)
A+B
a
d
a
d
a
No
Description:
- 2 refrigeration machines with different capacities have an internal output control (e.g. hot gas
bypass) controlled in sequence to a common flow temperature.
- Typical capacity profile: Aggregate A (min. output = 0.5 kW, rated output = 3 kW), Aggregate B (min.
output 1 kW; rated output 6 kW).
- The total output at X
P
= 100 % is 9 kW.
Plant diagram
Function diagram (not to dimensions)
AI
DI
AO
DO
T
31
2
3
S
63
1
2
1
2
0 %
Q
X
P
100 %
A
A
B
+
B
31
23
D
27
Configuration diagram
C D
C
D
X
A
B
Rotary
step switch 1
Modul. output
Modul. output
Main menu > Extra configuration > Aggregates > Rotary step switch > Rotary step switch
1…2 >
Configuration
Operating line
Setting
Type Flexible
Main menu > Commissioning > Settings >…
or
Main menu > Settings > Aggregates > Rotary step switch > Rotary step switch 1…2 >
Operating line
Range
Setting
Output A
0.1…999.9
3.0
Min output A
0.0…999.9
0.5
Output B
0.1…999.9
6.0
Min output B
0.0…999.9
1.0
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Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Aggregates
01.04.2010