Sauter flexotron®800
ventilation
Configuration
P100012082
104
16.28.5 Exchanger to 100% at start and alarm delay at start
To minimise the risk of freeze-up problems, the heat exchanger can be forced to
maximum capacity for the set time at start-up.
To eliminate the risk of, for example, fan pressure alarms at start-up, all alarm functions
can be suppressed for the set time.
Exch 100% at start
2 sec
Alarm delay at start
60 sec
For the function
’’Slave control of the extract air fan’’, the fan will start directly at 50 %
after the start delay, in order for the heating of the exchanger to work for this operating
mode. When the supply air fan starts, the extract air fan will be slave controlled by the
flow in the supply air duct.
16.28.6 Split controller signal
Splits the controller output (Heating Controller Output signal = HCOut) between the
analogue temperature control output signals Y1, Y2 and Y3 for "Heating", "Heat
exchanger" and "Cooling".
To create a neutral zone, leave a percentage gap between sequences.
The set P-band for the supply air controller is for the whole controller signal. This
means that the P-band for each sequence is proportionate to the split percentage
values given to sequences.
Example:
P-band for the supply air controller is set to 33K. The HCO is set so that cooling gets
0…30 % = 30 %, the exchanger gets 32…50 % = 18 % and the heater gets 54…100 %
= 46 %. The individual P-bands will then be:
Chiller: 30 % of 33°C = 10°C
Exchanger: 18 % of 33°C = 6°C
Heating: 46 % of 33°C = 15°C
The remaining 2°C are the neutral zone between cooling and exchanger.
Split settings
Exchanger
0% at HCOut= 32%
100% at HCOut= 50%
Split settings
Heating
0% at HCOut= 54%
100% at HCOut= 100%
Split settings
Cooling
0% at HCOut= 30%
100% at HCOut= 0%
Split settings
Extra Sequence Y4
0% at HCOut= 0%
100% at HCOut= 0%
