6.
ON/OFF Valves and Proportional Speed Fan (0-10V)
The valves are activated in ON-
OFF mode with hysteresis.
Speed fan follow to the Propor-
tional Band as shown in the dia-
gram aside generating a 0-10V
output control signal.
7a.
Proportional Valve (0-10V) and Proportional Speed Fan (0-10V) (2-pipe plant)
The valves are activated in se
-
quence mode (0-5/6-10) with
hysteresis. If the set is satisfied the
output is 5,5V.
Fan speeds follow the Proportion-
al Band as shown in the diagram
aside generating a 0-10V output
control signal.
Control modes diagrams
2-pipe plant
Out AO1
Out AO2
6
No
---
Fan
6
Yes
---
Fan
7
Yes
Hot/cool valve
Fan
7
No
Hot/cool sequence
Fan
Modulating valve and/or fan application example
7b.
0-5/6-10 V Sequence Valves and Proportional Speed Fan (0-10V) (4-pipe plant)
The valves are activated in Pro
-
portional mode (0-100%) using
the set proportional band, (heat-
ing during winter, cooling during
summer).
Fan speeds follow the Proportion-
al Band as shown in the diagram
aside generating a 0-10V output
control signal.
1
st
Issue rev. c
12/2015
DBL408e
Page 12
