Checks Before Commissioning; Cleaning & Maintenance; Fault Rectification - Maico EZQ 20/4-E Ex e Original-Montage- Und Betriebsanleitung

EN
19 Commissioning

19.1 Checks before commissioning

1. Perform the following checks: D = detailed
check, N = close inspection, S = visual in-
spection
Test schedule
I No damage or unauthorised
changes on unit.
II Condition of terminal box seal
satisfactory. Ensure connections
are sealed.
III No evidence of water or dust en-
tering the housing in compliance
with the IP rating.
IV Encapsulated components un-
damaged.
V Air flow not hampered. No for-
eign bodies in the air section.
VI Sealing of shafts, cables, ducts
and/or conduits satisfactory.
VII Duct system and transition to
mixed system undamaged.
VIII Unit has sufficient protection
from corrosion, weather, vibra-
tion and other interfering factors.
IX Accumulations of dust or dirt not
excessive.
19.2 Checking correct functioning
1. Switch on unit and perform the following
checks: D = detailed check, N = close inspec-
tion, S = visual inspection
Test schedule
I Direction of rotation / air flow dir-
ection.
II Ensure correct power consump-
tion The rating current (→ rating
plate) may be higher or lower de-
pending on local conditions (duct
distance, altitude, temperatures).
I may be exceeded at nominal
max
voltage due to ageing or a reduc-
tion in terminal voltage (e.g. trans-
former).
III Thermal safety is ensured by the
motor protection switch system.
19.3 Setting of motor protection
switch
1. Set motor protection switch to 0.32 A.
With a starting current ratio of I
tor must be switched off within time t
seconds.
If this is not the case, the effective nominal cur-
rent occurring at the operating point must be de-
termined, adjusted and the test repeated.
20 Cleaning, maintenance
According to Directive 1999/92/EC, the work-
place and work equipment must be main-
tained with due regard to safety. The points
listed in EN 60079-17 must be taken into ac-
count and carried out.
The intervals should be determined by the oper-
ating company in accordance with EN 60079-17
and may be extended if a sufficient maintenance
concept is used – frequency depending on ambi-
ent conditions and anticipated restrictions. The
maintenance intervals are to be shortened in
case of dust or a corrosive atmosphere.
DANGER Danger of electric shock.
Prior to accessing the connection terminals, dis-
connect all supply circuits.
Secure against being switched back on, check
that no voltage is present.
Earth and connect the EARTH with active parts
which are to be short-circuited.
D N S
Cover or block off neighbouring live compon-
● ● ● ents.
Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
●
and/or dust layers.
CAUTION Hot motor surfaces may result
●
in skin burns if touched.
Do not touch hot motor surfaces. Always wait
until the motor has cooled down.
●
CAUTION Risk of injury if there is no
protection against accidental contact (pro-
● ● ●
tective grille) on the free air inlet/outlet.
There is danger, in particular, if the fan is in-
● ● ●
stalled in a manner accessible to persons.
Fan may only be operated with an access
●
guard.
Areas with possible access to rotating parts (im-
peller) should be made safe with an access
● ● ●
guard according to EN ISO 13857, e.g. with
MAICO protective grille SG.. (meets IP 20 de-
gree of protection according to EN 60529).
● ● ●
NOTICE Damage to the unit if the line feed-
through to the terminal box is pre-installed.
Line feedthroughs may be damaged if the con-
nection line is pulled or the unit is lifted by the
line.
Do not pull connection lines or lift the unit using
the lines.
D N S
20.1 Cleaning by a qualified person
●
Regularly clean fan at appropriate intervals with
a damp cloth, especially after long periods out of
●
service.
Clean fan at shorter intervals if you expect lay-
ers of dust to accumulate on the impeller and
other parts of the fan.
20.2 Maintenance by a qualified per-
son
The fan should be regularly checked and main-
tained. In particular, ensure:
●
• unimpaired flow in the air duct.
• the effectiveness of the protective grilles.
• compliance with the permitted temperatures.
• quiet bearings. Bearing life of 40 000 hours,
depending on application.
• cables are secure in the terminal box.
/I = 1.5, the mo-
A N
• potential damage to terminal box, cable screw-
= 300
E
connections, sealing plugs and cables.
• secure routing of cables.
During regular safety checks (maintenance inter-
val), undertake a complete check in accordance
with the previous test schedules.
This involves checking the function of safety
components, air gap, power consumption, bear-
ing noise, damage and disproportional vibration
(e.g. impeller imbalance). Remove dirt and for-
eign particles.
20.3 Repairs
In the event of wear/tear on unit components,
have the fan repaired or overhauled only by a
certified repair shop.

21 Fault rectification

See Action to take in the event of a fault [} 9]
22 Disassembly and environ-
mentally-sound disposal
DANGER Danger of electric shock.
Prior to accessing the connection terminals, dis-
connect all supply circuits.
Secure against being switched back on, check
that no voltage is present.
Earth and connect the EARTH with active parts
which are to be short-circuited.
Cover or block off neighbouring live compon-
ents.
Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
and/or dust layers.
• Only a qualified electrician trained in and au-
thorised for explosion protection work may un-
dertake disassembly.
Old devices and electronic components
may only be dismantled by specialists with
electrical training. Proper disposal avoids detri-
mental impact on people and the environment
and allows valuable raw materials to be reused
with the least amount of environmental impact.
Do not dispose of the following
components in household waste!
Old devices, wearing parts (e.g. air
filter), defective components, elec-
trical and electronic scrap, environ-
mentally hazardous liquids/oils, etc.
Dispose of them in an environment-
ally friendly manner and recycle
them at the appropriate collection
points (→ Waste Management Act).
1. Separate the components according to ma-
terial groups.
2. Dispose of packaging materials (cardboard,
filling materials, plastics) via appropriate re-
cycling systems or recycling centres.
3. Observe the respective country-specific and
local regulations.
Acknowledgements
© Maico Elektroapparate-Fabrik GmbH.
Translation of the original operating instructions.
Misprints, errors and technical changes are re-
served. The brands, brand names and protected
trade marks that are referred to in this document
refer to their owners or their products.
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