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Preliminary 003
Access V4.X Configuration manual
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2019-05-13
Room outdoor compensated
The room temperature can be compensated when the outdoor temperature increases. One can, for
instance, imagine accepting a slightly higher room temperature if it is warm outside or, conversely, a
slightly lower temperature if it is chilly. This function is included to conserve energy.
Extract air outdoor compensated
The extract air temperature can be compensated when the outdoor temperature increases. One can, for
instance, imagine accepting a slightly higher extract air temperature if it is warm outside or, conversely,
a slightly lower extract air temperature if it is chilly. This function is included to conserve energy.
Extract air dependent supply air
A difference between extract air temperature and supply air temperature can be configured to maintain
the supply air temperature setpoint to follow extract air temperature with this difference (+10°C to -
10°C). Supply air temperature setpoint = extract air tempe difference.
Heating/Cooling sequences
The supply air temperature is adjusted by controlling the output signals
for AHU’s components by
regulating corresponding sequences. Up to 10 sequences with separate PID control settings can be used.
Each sequence can be set for Heating, Cooling, Exchanger, Damper, Pressure/flow compensation or set
as Not used.
For standardization all 10 sequences have predefined names to cover the most frequent configurations
of AHUs. The sequences are also identified by letter A to J.
The order of sequence activation is set by assigning order number for heating and cooling. As in
configuration example bellow in case of heating demand, the Exchanger (SEQ-B) will start first and
Heating (SEQ-A) will follow second.
In case of cooling demand, the Exchanger (SEQ-B) will start first and the Cooling (SEQ-C) will follow
second.
Configuration > Functions > Function activation > Heating/Cooling sequences >
Position
Heating
Cooling
Start
Heating
Start
Cooling
Name
SEQ-A
2
Off
0%
0%
Heating
SEQ-B
1
1
0%
0%
Exchanger
SEQ-C
Off
2
0%
0%
Cooling
SEQ-D
Off
Off
0%
0%
Recirculation 1
SEQ-E
Off
Off
0%
0%
Recirculation 2
SEQ-F
Off
Off
0%
0%
Fan heating/cooling
SEQ-G
Off
Off
0%
0%
Heating 2
SEQ-H
Off
Off
0%
0%
Cooling 2
SEQ-I
Off
Off
0%
0%
Exchanger extract
SEQ-J
Off
Off
0%
0%
Extra heating/cooling capacity