13
●
Especially make sure that the arrow showing the direction of air flow through the filter cassette can
be seen from the side of the operator (the arrow is by the unit´s door) and that it is always pointing
toward the heat recovery exchanger!
●
The unit is supplied with filter cassette labels unattached. Attach the relevant identification labels
near both filters. (e.g. for the door type)
Unpack and install air filters last, immediately before putting the unit into service to avoid their
contamination.
Use original filter cassettes only! If different cassettes were used, the manufacturer could not
guarantee their proper function!
Record the date of installing filters appropriately in e.g. the operational logbook.
5.11.
Installing, connecting and filling liquid manometers
Liquid manometers are a separately supplied accessory. Manometers are compulsory for hygienic
units in compliance with VDI 6022.
Manometers are used for measuring the pressure loss of air filters. During installation follow the
visual instructions supplied with this optional accessory. After installation level the manometers
horizontally.
Connect the manometers to collection points on the unit´s surface using tubes. Connect the tube
to the top of the manometer and run it to the metal bushing on the unit´s surface (also see a
separate manometer installation manual). The tube must always connect two matching connection
points identified by symbols “+” and “F+” and “-“ and “F-“ (cannot be combined). Make sure that
tubes from just one filter are connected to the manometer.
Attach the relevant label near each manometer. Fill out the boxes with the filter grade and record
the flow rates and pressure losses of the clean filter (initial pressure loss) and when clogged (final
pressure loss) using data from the table below; the values must be adjusted on the basis on actual
air flow rates through the unit. The unattached label without information filled out is included.
DUPLEX
VENT
Flexi 650
Filter type Flow rate (m
3
/h)
150
300
450
600
700
ISO
EPM1
50%
Initial pressure loss (Pa)
20
42
68
98
119
Final pressure loss (Pa)
200
200
200
200
200
ISO
EPM10
50%
Initial pressure loss (Pa)
3
10
21
35
47
Final pressure loss (Pa)
200
200
200
200
200
DUPLEX
VENT
Flexi 1100
Filter type Flow rate (m
3
/h)
250
500
750
1000
1100
ISO
EPM1
50%
Initial pressure loss (Pa)
8
32
71
126
153
Final pressure loss (Pa)
200
200
200
200
200
ISO
EPM10
50%
Initial pressure loss (Pa)
6
16
29
45
52
Final pressure loss (Pa)
200
200
200
200
200
DUPLEX
VENT
Flexi 1600
Filter type Flow rate (m
3
/h)
400
800
1200
1500
1600
ISO
EPM1
50%
Initial pressure loss (Pa)
16
43
84
126
142
Final pressure loss (Pa)
200
200
200
200
200
ISO
EPM10
50%
Initial pressure loss (Pa)
6
14
25
38
43
Final pressure loss (Pa)
200
200
200
200
200
