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Corrigo ventilation 3.4 manu

ManualsBrandsSystemair ManualsAir Handling UnitsTopvex TR4000-208-3-CAV ERV - 4000 cfm Top Connection Rotary Compact ERV
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Manual Corrigo Ventilation, revision R Chapter 5 Functional description 47
Frequency control EAF with flow control SAF
The rotational speed of the extract air fan is controlled by a pressure transmitter which is placed in
the extract air duct. The supply air fan is controlled by the extract air duct flow in order to achieve a
balanced ventilation. A pressure transmitter placed in the extract air fan cone (“Extra SAF
Pressure”) provides a measurement of the current extract air flow. A corresponding pressure
transmitter is placed in the supply air fan cone, providing a measurement of the supply air flow.
The supply air fan is controlled using the extract air flow as a setpoint. A scaling factor can be
added if the supply air fan does not have the same characteristics as the extract air fan.
Frequency control SAF and EAF with external flow setpoint
This signal can be used to control the SAF and EAF flow setpoints from an external VAV system if
the ”Frequency control external” fan type is used.
If this signal is configured as an analogue input signal, the flow setpoint for the SAF and EAF will
be controlled in normal speed.
The signal can be configured by using scaling: Min volt input (Vmin)/Min flow and Max volt input
(Vmax)/Max flow.
Minimum limit
For frequency controlled fans an adjustable minimum limit can be set individually on the supply air
and extract air fan control signals.
In- and outputs
1-speed
2-speed
Pressure/
Flow
DO
DO
Start SAF Normal
DO
DO
Start EAF Normal
DO
Start SAF reduced
DO
Start EAF reduced
DO
SAF frequency start
DO
EAF frequency start
DI
DI
Indication/alarm SAF
DI
DI
Indication/alarm EAF
AI
Pressure transmitter SAF
AI
Pressure transmitter EAF
AI
Pressure transmitter 2 SAF
AI
Extra pressure transmitter SAF
AI
Extra EAF Pressure
AI
External flow setpoint
AO
Frequency converter SAF
AO
Frequency converter EAF
5.4.2 Demand controlled ventilation
In applications with varying occupancy the fan speeds or mixing dampers can be controlled by the
air quality as measured by a CO
2
sensor.
You can choose to activate the function "1. Always", "2. Only when the running mode is On", "3.
Only when the running mode is Off".