Fläkt Woods
8666 GB 2010.06
Specifications are subject to alteration without notice
Installation and maintenance instructions
Control equipment
19
Nollställningsknapp
Byglar
1
2
3
4-20mA
ZERO
0,8/4s
Jumper 2
Jumper 3 24VDC
GND
0-10V
Configuration of the sensor
Where the pressure range must be changed on the sensor,
do this in accordance with the figures below.
Jumpers:
Response time
0,8s
4s
Jumper 1
Pressure range
1
2
3
4
Jumper 2
Jumper 3
NOTE!
A black field indicates a strapped connection.
Model
Pressure range 1
Pressure range 2
Pressure range 3
Pressure range 4
DPT1000 –R4
250Pa
500 Pa
750 Pa
1000Pa
DPT3000 –R4
750Pa
1500Pa
2250Pa
3000Pa
DPT5000 –R4
1250Pa
2500Pa
3750Pa
5000Pa
DPT7000 –R4
1700Pa
3500Pa
5250Pa
7000Pa
NOTE!
The new pressure range must be entered into the controller when changing the pressure range on the sensor,
irrespective of whether the pressure or flow is being controlled. Read about this in the controller manual.
Zero point-calibration
NOTE!
The sensors must be zero calibrated during commissioning.
They should then be zero calibrated annually.
The sensors should have been energized for approximate
-
ly five minutes before calibration is carried out. After that,
remove the hoses from the sensors. To start calibration,
press the button below the dip switches, see the figure.
Release the button when the LED lights.
Fig. 16
Zero point calibration
Flow determination according to the formula:
q =
where the constant k is unique for each air handling unit
size. The k factor is shown on the air handling unit data
plate
k-factors
D
p m
3
/s
1
k
e
(273+t)
293 m
3
/s
e
Temperature correction
The flow scale on the display instrument and flow formula
above apply to air at a temperature of +20°C.
At other air temperatures the flow must be corrected using
the formula:
q = q
20
q = the true flow through the fan,
q
20
= the flow reading
t = current temperature in °C
Zero calibration button
Jumpers
Содержание eq Controls
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