Sauter flexotron®800
ventilation
Functional description
P100012082
50
If demand controlled ventilation is activated in combination with mixing dampers, and
the CO
2
-value rises above the setpoint value, the dampers will let in more outdoor air.
The function is controlled by a PI-controller. See section 5.1.3 Heat exchanger types.
The function has a settable minimum running time.
In- and outputs
AI
CO
2
sensors
5.5
Pump control
Digital inputs and outputs can be configured for pump control.
All the pumps can use run indication with malfunction alarm
or
an alarm input
connected to a motor protection or similar.
5.5.1
Heating circuit
The circulation pump for the heating circuit will always run when the outdoor
temperature is lower than a settable value (FS +10°C). At higher outdoor temperatures
the pump will run when the heating output is larger than 0V.
If no outdoor temperature sensor has been configured, the stop temperature can be set
to 0°C. Then the pump will only run on heat demand.
The pump has a settable stop delay.
The pump will be exercised once daily at 3 p.m. for one minute or the set shortest
running time, whichever is the longest.
5.5.2
Exchanger circuit, liquid connected exchangers
The circulation pump for the exchanger circuit will run when the output to the exchanger
valve is larger than 0V.
The pump has a settable, shortest running time.
The pump will be exercised once daily at 3 p.m. for 1 minute, or the set stop delay,
whichever is the longest.
5.5.3
Cooling circuit
The circulation pump for the cooling circuit will run when the output to the cooling valve
is larger than 0V.
The pump has a settable, shortest running time.
The pump will be exercised once daily at 3 p.m. for 1 minute, or the set stop delay,
whichever is the longest.
flexotron®800 can be configured to block DX cooling if a
’’Malfunction P1-Cooling’’
alarm should occur.
In- and outputs
Heating Exch Cooling
AI
Outdoor temperature sensor
DO
DO
DO
Start/stop circulation pump
DI
DI
DI
Run ind/alarm, circ. pump
5.6
Damper control
5.6.1
Close-off dampers
The outdoor air and exhaust air ducts close-off dampers can be controlled by digital
outputs or be hard-wired to the supply air fan relays for normal and reduced speed in
