FläktGroup ECO SIDE, Руководство по установке и обслуживанию

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eCO Side - Installation and Maintenance Manual 32
FläktGroup DC_10176GB_20180924_R3 Specifications are subject to alteration without notice
q =
1000
k
D
p
m
x
10. CONTROL FUNCTIONS, CONT.
10.7 FAN CONTROL
10.7.1 STANDARD
3-speed control (trickle, normal, boost). To change fan speed use
schedules, external timer or PIR.
10.7.2 CONSTANT PRESSURE CONTROL (COP)
Control principle in which the unit maintains a constant duct
pressure. Normally used in variable flow systems (VAV).
Pressure sensors GP3 and GP4 are mounted in the control
box. With pressure control the pressure in the index duct (the
duct with the highest pressure and where the static pressure
is the lowest) is controlled. The hose from the pressure sensor
GP3 has to be placed in the supply air duct and the hose from
the pressure sensor GP4 has to be placed in the extract air duct.
Make sure that both the hoses have to be placed at a suitable
location with a representative pressure.
Units that are supplied with pressure control will be pre-
con figured for that. For settings see section 9.6.
10.7.3 CONSTANT AIR VOLUME (CAV)
Control principle in which the unit maintains a constant duct flow.
Pressure sensors are mounted in the control box and all the hos-
es are connected.
Using a measurement pressure
D p
m
in Pa and a constant k,
the airflow q in R/W is calculated with the follo wing formula:
The measuring pressure, D p
m
, is the difference between the pres-
sure in the empty section at the fan inlet and the pressure inside
the inlet cone.
Value of the constant (k) is shown in the table below. For set-
tings see section 9.6.
Size 03 04 06
k-value extract air fan 58,4 51,5 49,2
k-value supply air fan 62,5 52,1 51,4
4-20mA
LED
Jumper 1
Jumper 2
Jumper 3 24VDC
GND
0-10V
LED
Jumper 1
Jumper
2
Jumper
3
push-button
ZERO POINT-CALIBRATION, PRESSURE SENSORS
The sensors must be zeroed during commissioning. They should
then be zeroed annually. The sensors should have been ener-
gized for approximately one hour before calibration is carried out.
After that, remove the hoses from the sensors. To start calibration
press the push-button next to the pressure range jumpers.
The red LED lights up and goes out after about a second.
Reassemble the air hoses.
Done!
10.7.4 CO
2
CONTROL
Control principle in which the unit limits the CO
2
value.
A CO
2
sensor is mounted in the extract air when delievered.