EN/US/CA/A.mist A.mistT/UM-2239-1
13
Subject to alteration without prior notice.
Risk of trapping injury!
Do not insert your hand into the filter unit when the fan is running. Do not wear
loosely hanging clothing near the fan when operational. These can be sucked
into the fan or get caught.
1.
Check that the filter cassettes are properly secured.
Open the door and check that the filter cassettes are properly secured, i.e. that the sealing is com
-
pressed to approx. 3 mm. How to secure, se heading 12.3.
2. The fan’s direction of rotation
Make sure that the fan impeller rotates in the proper direction (counter-clockwise viewed from the
motor side). If you are unable to see the motor while the impeller is rotating, start the fan, read the
pressure drop across the filters from the pressure gauge, stop the fan, transpose two phase leads,
restart the fan and read the pressure drop again. The connection that gave the highest pressure
drop is the correct one.
Note: For A•mist
20HP
, the fan impeller rotates clockwise viewed from the motor side.
3.
Air flow
The air flow must be checked, so that the value does not exceed the design level for the instal
-
lation (refer to the quote or unless otherwise stated the nominal flow under heading “Technical
data”). The air flow can be adjusted with the damper or frequency converter, if fitted. If it is difficult
to reach the required flow, check the direction of rotation of the fan motor according to section 2
above. If the unit is run with a too high flow, there is a large risk that the life span of the filter cas
-
settes will be shortened.
4.
Pressure drop over the filter cassettes
Read the A•monitor
(
A•mist
60
: read the analogue pressure gauges)
and note down the pressure
drop over the different filter stages (heading 11 resp 10). These values can then be used as a basic
value to assess the pressure increase /life span of the different filter cassettes.
5. Spray system (if installed)
If the filter unit is equipped with a spray system its function must be checked as this has a large ef
-
fect on the life span of the filter cassettes.
The function of the spray system and fault tracing are described in the separate user guide.
6. Frequency converter (if installed)
If the filter unit is equipped with a frequency converter, you find a protocol of the different settings
and a description how to handle the frequency converter attached.
TO BE CHECKED BEFORE THE FIRST START OF THE
FILTER UNIT
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10.1 General
Preventive maintenance and regular service extend the life span and ensure that the filter
unit maintains its performance. Besides, you mainain a high cleaning efficiency in the indu
-
strial environment.
To facilitate inspection of the filter cassette status, Absolent supplies most
A•mist
filter units
with an electronic pressure gauge as a standard. A•mist
60
is supplied with 3 analogue pres-
sure gauges for the different filter stages. The different pressure gauges are positioned on
the front of the filter unit as shown below:
CARE / MAINTENANCE
10
