Flow indication equipment EUAZ-33, ECAZ-30

INSTALLATION & MAINTENANCE
EU Air Handling Unit
Flow indication equipment EUAZ-33, ECAZ-30
75
125
89
122
120 145
175
EUAZ-33-1
ECAZ-30-1
EUAZ-33-3
ECAZ-30-3
Pressure converter (0–500 Pa) without display
Digital indicator instrument with integral pressure changer
Pressure converter (0–500 Pa) without
display
Pressure converter (0–500 Pa) with display
The pressure converter is connected via air hoses to the qnozzle measurement probe in the fan inlet. The 0–10 V /
4–20 mA output signal, which is in a linear relationship
to the flow, can be connected to a frequency inverter or
to a central monitoring system. The actual flow can be
read on the display of the flow transmitter.
The pressure converter is connected via air hoses to the qnozzle measurement probe in the fan inlet. The 0–10 V
output signal, which is in a linear relationship to the
flow, can be connected to a frequency inverter or to a
central monitoring system.
Technical data, sensor
Technical data, sensor
Supply voltage
Frequency
Power consumption
Analogue output signal
Current
Measurement range
Accuracy
Enclosure
Weight
Permissible ambient
operating temperature
Supply voltage
Frequency
Power consumption
Analogue output signal
Current
Measurement range
Accuracy
Enclosure
Weight
Permissible ambient
operating temperature
24 V ± 20%
50–60 Hz
3 VA
0–10 V
1 mA
0–500 Pa
± 12,5 Pa
IP 32
0.45 kg
24 V AC ± 15%
50–60 Hz
3 VA
0–10 V / 4–20 mA
0,5 mA
0–500 Pa
± 5 Pa
IP 65
0,65 kg
0 to +55 °C
–10 to +50°C
Electrical connection
Electrical connection
out
G
B1
M
24 V AC
Output signal 0–10 V DC
Common neutral
Fläkt Woods
3224 GB 03.01
NL+
1
Output signal 0–10 V DC / 4–20 mA
Common neutral
24 V AC
Specifications are subject to alteration without notice
EU Air Handling Unit
MAINTENANCE
Flow indication equipment EUAZ-33-3, ECAZ-30-3
Settings on the lower card
DIL 1
ON
1 2 3 4 5
Dip switches
ZERO
P1
Potentiometer
Terminal block for electrical connection
Output (0-10V, 4-20mA)
N–
(Common)
L+
(24VAC)
1. Remove the cover. Fold up the upper card.
2. Connect the supply cable (24 V AC) and any signal
cable (0-10 V / 4-20 mA) to the terminal block, if
this has not already been done.
3. Select the desired output signal.
DIL 1
0–10 V
ON
1234 5
DIL 1
4–20 mA
ON
1234 5
4. Switch on the supply voltage and wait for 60 seconds
(warm-up period).
5. Disconnect the pressure hoses.
Adjust the zero point of the sensor
with the ZERO potentiometer (P1)
until the display shows 000. Then
reconnect the pressure hoses.
Display
N.B.
The zero point should be checked annually.
Fläkt Woods
3224 GB 03.01
2
ZERO
P1
Specifications are subject to alteration without notice
EU Air Handling Unit
MAINTENANCE
Flow indication equipment EUAZ-33-3, ECAZ-30-3
Settings on the upper card
(Factory setting)
DIL 1
Display
ON
1 2 3 4 5
Indication on display
SW 1
Pressure
Flow
SW 1
ON
Dip
switches
DIL 2
1 2 3 4 5
Fine adjustment of flow indication
– Fold down the upper card.
SW 1
Operational setting of DIL 2
1. Slide the double switch SW1/SW2 to the
right.
DIL 2
A) Flow indication 000–999 l/s.
ON
SW 1
1234 5
2. First set switch 1 = OFF, and then
switch 2 = ON.
DIL 2
B) Flow indication 1.00–9.99
m3/s.
ON
DIL 2
m3/s.
DIL 2
ON
12 3 4 5
3. In the table, read the flow to be indicated on the display at 500 Pa. Example:
EC-05, impeller wheel with forwardcurved blades ⇒ 3.95 m3/s. Adjust
potentiometer P4 until the display shows
this value.
1234 5
C) Flow indication 10.0–99.9
P4
Potentiometer
ON
1234 5
Display
P4
DIL 2
4. Now set switch 2 = OFF, and then switch
1 = ON. Ready.
Fläkt Woods
3224 GB 03.01
3
ON
12 3 4 5
Specifications are subject to alteration without notice
EU Air Handling Unit
MAINTENANCE
Flow indication equipment EUAZ-33, ECAZ-30
EU size
1)
size 2
2) size 1
normal
2) size 2
normal
2) size 3
normal
2) size 1
reinforced
2) size 2
reinforced
2) size 3
reinforced
K-factor m3/s at K-factor m3/s at K-factor m3/s at K-factor m3/s at K-factor m3/s at K-factor m3/s at K-factor m3/s at
500 Pa
500 Pa
500 Pa
500 Pa
500 Pa
500 Pa
500 Pa
11
30.76
0.727
20
15.89
1.41
21.34
1.05
16.42
1.36
21
10.07
2.22
16.42
1.36
10.72
2.09
8.12
2.75
22
8.21
2.72
10.72
2.09
8.12
2.75
6.51
3.43
30
8.21
2.72
10.72
2.09
8.12
2.75
6.51
3.43
31
5.07
4.41
6.51
3.43
4.57
4.89
3.90
5.73
32
3.61
6.19
4.57
4.89
3.90
5.73
3.03
7.38
33
3.61
6.19
3.90
5.73
3.03
7.38
40
3.61
6.19
4.57
4.89
3.90
5.73
3.03
41
2.89
7.74
3.90
5.73
3.03
7.38
2.30
42
2.22
10.1
3.03
7.38
2.30
9.72
1.99
11.24
44
2.22
10.07
2.30
9.72
1.99
11.24
50
2.22
10.1
3.03
7.38
2.30
9.72
1.99
51
1.69
13.2
2.30
9.72
1.99
11.24
1.50
53
1.4
16.0
1.99
11.24
1.50
14.91
60
1.4
16.0
1.99
11.24
1.50
62
1.09
20.5
1.50
14.91
1.35
64
0.85
26.3
1.35
16.56
71
0.85
26.3
1.35
16.56
1.08
0.85
26.3
1.35
82
84
73
80
EC size
0.69
24.37
0.92
6.51
3.43
4.89
3.90
5.73
3.03
7.38
4.57
4.89
3.90
5.73
3.90
5.73
3.03
7.38
7.38
4.57
4.89
3.90
5.73
3.03
7.38
9.72
3.90
5.73
3.03
7.38
2.72
8.22
2.23
10.03
7.38
2.72
8.22
8.22
2.23
10.03
11.24
3.03
7.38
2.72
8.22
2.23
10.03
14.91
2.72
8.22
2.23
10.03
1.75
12.78
1.35
16.56
2.23
10.03
1.75
12.78
1.35
16.56
14.91
1.35
16.56
2.23
10.03
1.75
12.78
1.35
16.56
16.56
1.08
20.70
1.75
12.78
1.35
16.56
1.08
20.70
1.08
20.70
0.80
27.95
1.35
16.56
1.08
20.70
0.80
27.95
1.08
20.70
0.80
27.95
1.35
16.56
1.08
20.70
0.80
27.95
20.70
0.80
27.95
0.68
32.88
1.08
20.70
0.80
27.95
0.68
32.88
16.56
1.08
20.70
0.80
27.95
1.35
16.56
1.08
20.70
0.80
27.95
1.08
20.70
0.80
27.95
0.68
32.88
1.08
20.70
0.80
27.95
0.68
32.88
0.80
27.95
0.68
32.88
0.52
43.00
0.80
27.95
0.68
32.88
0.52
43.00
K-factor m3/s at K-factor m3/s at
500 Pa
500 Pa
32.18
4.57
3.03
2)
2
3.43
3.43
2.72
1)
1
6.51
6.51
Inspection of pressure converter:
Fit T-pieces to the air hoses and connect
a manometer. The flow is determined
from the relationship:
q=
3
15.81
1.41
21.63
1.03
4
9.31
2.40
11.25
1.99
5
5.49
4.07
6.06
3.69
6
4.17
5.36
4.95
4.52
7
3.20
6.99
3.88
5.76
8
2.52
8.87
2.96
7.55
9
1.99
11.24
2.29
9.76
√ ∆p
k
m3/s
N.B. The q-nozzle measurement probe
should be blown clean 1–2 times a year,
depending on the air quality.
Temperature correction
The indicated flow is applicable to air
at a temperature of +20°C. At other air
temperatures, the flow must be corrected using the formula:
q = q20 ·
√
(273 + t)
m3/s
293
where q = actual flow,
q20 = indicated flow, and
t = ambient temperature in degrees C
1) Impeller wheel forward-curved blades
2) Impeller wheel with backward-curved blades
Calculation of air flow from output signal
Flow as a function of output signal 0–10 V
q = q500 ·
E
m3/s
10
Flow as a function of output signal 4–20 mA
q = q500 ·
E–4
m3/s
16
where q500 = flow at 500 Pa from q-nozzle, m3/s
E
= actual output signal from pressure converter in V and mA
Fläkt Woods
3224 GB 03.01
4
Specifications are subject to alteration without notice
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