Sauter flexotron®800
ventilation
Configuration
P100012082
93
16.23.2 Step controller cooling
"Step controller Cooling" can be set to sequential or binary.
Step contr. cooling
Sequential
"Step controller Cooling" activation levels for sequential control.
For binary control the activation levels are calculated by the controller depending
on the number of steps involved
Start step 1: 10 %
Stop step 1: 5 %
Start step 2: 50 %
Stop step 2: 45 %
Start step 3: 95 %
Stop step 3: 90 %
Control parameters. Chiller groups is used to calculate activation levels for binary
control.
‘‘Hyst.’’ is the switching differential used for each step when running
binary control.
Chiller groups: 3
Minimum on/off-
time: 60 sec
Hyst.: 0.5 %
When DX cooling is used in conjunction with pressure controlled or flow
controlled fans it is possible to block DX cooling if the supply air fan control
signal falls below a preset values. The blocking level is individually settable for
each DX cooling step.
At lower SAF-output
block step 1: 0 %
block step 2: 0 %
block step 3: 0 %
For a more detailed description, see section 5.1.4 Step controllers.
16.23.3 Step controllers Change-over
The digital output signals "Heating/cooling step 1", "Heating/cooling step 2" and
"Heating/cooling step 3" are used for step controllers during Change-over control (see
section 5.1.12). They have the same functions as other step controller outputs, but are
set to either heating or cooling depending on whether heating or cooling is required. In
other words, when heating is active, they will follow the settings for "Heating 1-3" and
when cooling is active they will follow the settings for "Cooling 1-3".
