Outdoor Air Compensation - Swegon GOLD RX Operation And Maintenance Instructions

6.4.1.8 Outdoor air compensation

Outdoor air compensation of the airflow can be activated if you
want to change the airflow for specific outdoor air temperatures.
An individually adjusted curve regulates the ratio between the
airflow and the outdoor air temperature. The curve has four
adjustable breakpoints..
If the function is selected solely for low speed or high speed
operation, the curve will regulate only one of these. The airflow
for the operating case that has not been selected will then be
according to the preset set point for airflow/duct pressure.
In the flow regulation mode, the current set point for airflow is
changed. When pressure regulation is selected, the current set
point for pressure is changed. The function has no effect if the
airflow is demand-controlled.
The airflow change is expressed in the preset airflow unit and
pressure in Pa.
Settings:
Value
Outdoor air compensation mode
X1, breakpoint, outdoor air temp. -50 – +50 °C -20 °C
X2, breakpoint, outdoor air temp. -50 – +50 °C -10 °C
X3, breakpoint, outdoor air temp. -50 – +50 °C +10 °C
X4, breakpoint, outdoor air temp. -50 – +50 °C +20 °C
Supply air, flow
Y1, breakpoint, supply air
Y2, breakpoint, supply air
Y3, breakpoint, supply air
Y4, breakpoint, supply air
Extract air, flow
Y1, breakpoint, extract air
Y2, breakpoint, extract air
Y3, breakpoint, extract air
Y4, breakpoint, extract air
Supply air, pressure
Y1, breakpoint, supply air
Y2, breakpoint, supply air
Y3, breakpoint, supply air
Y4, breakpoint, supply air
Extract air, pressure
Y1, breakpoint, extract air
Y2, breakpoint, extract air
Y3, breakpoint, extract air
Y4, breakpoint, extract air
1) See table for min./max. flows in Section 6.4.1.2
36 www.swegon.com
Setting Factory
range setting
Inactive/Low Inactive
speed/High
speed/Low
speed and
High speed
1) 25% of max.
airflow for air
handling unit
25% of max.
1)
airflow for air
handling unit
1) 25% of max.
airflow for air
handling unit
25% of max.
1)
airflow for air
handling unit
25% of max.
1)
airflow for air
handling unit
1) 25% of max.
airflow for air
handling unit
1) 25% of max.
airflow for air
handling unit
25% of max.
1)
airflow for air
handling unit
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
20-750 Pa 100 Pa
Outdoor air
compensation
3,0
2,5
1
2,0
1,5
2
1,0
0,5
-30 -20 -10
X = Outdoor air temperature °C
Example:
Flow regulated air handling unit The same principle can be ap-
plied to a pressure regulated AHU, however this well cause a
reduction in pressure in Pa.
If the outdoor air temperature is under -20 °C (X1), the flow set
point will be a constant 2.0m
If the outdoor air temperature is between -20 °C (X1) and -10
°C (X2), the airflow will decrease from 2.0 m
(Y2) as shown in the curve.
If the outdoor air temperature is between -10 °C (X2) and 10 °C
(X3), the flow set point will be a constant 1.0 m
If the outdoor air temperature is between 10 °C (X3) and 20 °C
(X4), the airflow will increase from 1.0 m
as shown in the curve.
If the outdoor air temperature is over 20 °C (X4), the flow set
point will be a constant 2.5 m
We reserve the right to alter specifications without notice.
GB.GOLDSKE.160901
4
3
0 +10 +20
/s (Y1).
3
/s (Y1) to 1.0 m
3
3 /s (Y2 and Y3).
/s (Y3) to 2.5 m
3 3
/s.
3
/s
3
/s (Y4)