Programming hints

Startup

The macro use the startup flag, use the Startup macro or reset the flag to 0 by yourself after controller is started.

Whether you do not need one of the macro inputs, connect them to the value specified in the next table.


Inputs

When not used set to:

ERCCtrlSig


T1_InletAirTemp

999

T2_SupplyAirERC

999

T3_ReturnAirTemp

999

T4_ExhaustAirTmp

999

SupFan_running

1

ExtFan_running

1

ERC_running

1

Summer_Mode

0


Energy efficiency calculation type

The macro can be used for:


If you need both efficiency values, use the macro twice and connect the right sensors.

If all 4 sensors are connected the macro calculates the supply air efficiency.

If one of the needed sensors is not connected, the respective output will display the invalid value "999".


Control signal input compensation

If the normal compensation factor

is not accurate enough, you have to adjust the input characteristics of the ERC control signal for an exact match of the efficiency.


Sensor connection for supply air efficiency

The next picture shows the sensor connection for supply air efficiency calculation.

The macro will calculate the supply air efficiency, even if all 4 sensors are connected.



Sensor connection for extract air efficiency

The next picture shows the sensor connection for extract air efficiency calculation.


ATTENTION: The macro will calculate the supply air efficiency, even if all 4 sensors are connected.