Dzq, Dzs - Maico DZQ Ex e Serie Manual De Instrucciones

UK
6. DZD .. Ex e/t: Use suitable insulation,
sound-deadening and installation material be-
tween the unit and roof/roof socket.
DANGER
!
fan may vibrate during operation.
The
Should the
attachment come loose, there is a
risk of death if the fan falls as a result of its
inherent weight.
Only mount on walls/ceilings
with sufficient load-bearing capacity and sufficiently
dimensioned mounting material.
NOTICE
Risks of leakages if unit is not sealed tightly
enough. Firmly screw fan down at all flange holes.
7. Install fan and screw down securely to wall/ceil-
ing/roof/roof socket at all flange holes [X] (4...16
holes, depending on type). Mounting material
of the sufficient size should be provided by the
customer. Note direction of rotation and air flow
 air direction arrows on unit sticker.
8. Mount DZR.. Ex e/t with pre-fitted mounting foot
to wall, ceiling or bracket. Mounting material
of the sufficient size should be provided by the
customer.
9. DZR/DZD .. Ex e/t: Connect ventilation ducts.
Securely screw down folded spiral-seams ducts
to all fan flange holes with flexible cuffs or flex-
ible couplings (MAICO types EL-Ex / ELA-Ex).
Ensure seal integrity.
10. Check air gap between impeller and housing.
DZQ ../DZS ..: Check air gap between impeller
and housing after mounting with the gauge
provided  Fig. A1, table.
DANGER
!
Explosion hazard when operating without pro-
tective device should foreign bodies fall or be
drawn into the air channel  Risk of death due
to spark formation. Use an approved protective
grille to protect the impeller from contact, anything
falling in and foreign bodies being sucked into the
air channel .
11. If the air inlet or outlet is not covered, mount a
permitted protective grille, e.g. MAICO protec-
tive grille SG... in front of the unit.
12. Ensure a sufficient fresh air supply intake.
13. Fit suitable insulation, sound-deadening and
installation material.
17 Electrical connection  Fig. E
DANGER
!
Danger of electric shock.
● Prior to accessing the connection terminals
disconnect 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 parts.
● Attach a clearly visible warning sign.
Ensure that there is no explosive atmosphere
and/or dust layers.
Operation only permitted:
● with permanent electrical installation.
● with connection cable permitted for explosion risk
areas and load.
● with mains disconnector with a contact opening
of at least 3 mm per pole.
● with shared non-metallic sheathed cable for mo-
tor voltage and PTC thermistor terminal.
● with permitted voltage and frequency
 rating plate.
● with explosion protection terminal box provided.
8
● with protective-conductor terminal, at mains end
in terminal box. There is a terminal on the outside
of the fan for earthing the duct system.
● if operating in intended air power range.
● at permitted operating point. The current and
power stated on the rating plate are measured
with free suction and free blow-out. They may be
higher or lower depending on the operating point.
A PTC thermistor triggering device is essen-
i
tial for thermal fusing. Only undertake speed
control with transformer matched to type,
e.g. with MAICO TR... Exception: DZ.. 35/2 B
Ex e/t does not offer speed control.
i
DZD .. Ex e/t: Fit service switch on roof direct-
ly at installation location.
Connect the fan electrically
1. Switch off power supply circuits, position a visible
sign warning against being accidentally switched
back on.
2. Open terminal box, route cables into terminal box
and screw down with cable feedthrough. Note
tightening torques (in Nm). Check tightness and
tighten if necessary.
Terminal box cover
M4 stainless steel fillister head
screws
Mantle terminals
M20 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping range
M25 x 1.5 cable feedthrough:
Connection thread
Cap nut
Clamping range
with set of reduction seals
M25 x 1.5 sealing plug:
3. Wire fan  Wiring diagram.
Insulate exposed wire ends not needed.
Earthing of fan and duct system
1. Connect PE conductor at mains end in terminal
box with explosion protection.
2. Connect PE conductor duct system to terminal on
outside of fan.
Direction of rotation and air flow
1. Check direction of rotation and air flow  Arrows
on fan housing. Maximum flow rate at stated air
flow direction according to Fig. D. If the air direc-
tion flow is reversed, the flow rate is reduced
by around 35 %.
Type
Air flow direc-
tion
 with air drawn

DZQ, DZS

across the motor
DZR DZR
 with air blown
DZD
across the motor
 Rotational direction of motor when looking
towards impeller
2. To reverse air flow direction, swap external
conductors L2 and L3. If the air flow direction is
reversed, check the safety and function of the
system again. Note that this may result in:
● the flow rate being reduced
● protection against foreign bodies being drawn
in no longer being guaranteed
● the explosive atmosphere no longer being
extracted and
● the fan not being thermally configured for
continuous operation (operating mode S1), i.e.
not for frequent changes in direction of rotation.
The fan motor may heat up impermissibly if the
direction of rotation is changed frequently.
PTC thermistor triggering device, on/off switch
1. Install PTC thermistor triggering device and wire
in accordance with wiring diagram ( wiring
diagram, Fig. E, terminals 4, 5 and 6). Recom-
mendation: Only install MAICO MVS 6 outside
areas subject to explosion hazards.
2. Fit an On/Off switch provided by the customer.
Checking electrical connection
1. Perform the following checks: D = detailed check,
N = close inspection, S = visual inspection
Test schedule
I Screws, cable and line feeds
(direct and indirect), blind closures
are of the correct type, complete
and sealed.
Cable and line type fit for purpose.
II
III No visible damage on cables and
lines.
IV Electrical connections secure.
V Unused connection terminals
tightened.
VI Insulation resistance (IR) of motor
windings satisfactory.
VII Earth connections, including any
additional potential compensation
connections, are correct (e.g.
1.4 Nm
connections are tight, conductor
cross-sections are sufficient).
4.0 Nm
VIII Error loop impedance (TN system)
or earth resistance (IT system)
2.3 Nm
satisfactory.
1.5 Nm
7 ... 13 mm
IX Automatic electrical protective
equipment set correctly (automatic
3.0 Nm
resets not possible).
2.0 Nm
X Special operating conditions are
10 ... 17 mm
observed (PTC thermistor
7 ... 12 mm
triggering device in accordance
1.5 Nm
with Directive 2014/34/EC).
XI All cables and lines which are
not being used are connected
correctly.
XII Installation with changeable
voltage in agreement with the
documentation.
XIII Electrical insulation clean/dry.
2. Fit terminal box cover for explosion protection.
Ensure that there are no dirt particles in the
terminal box and that the seal of the terminal box
cover has close contact all the way around the
terminal box. Note tightening torques of
1.4 Nm. Check seal integrity of terminal box.
Rotational direc-
18 Commissioning
tion 
Checks before commissioning
right
1. Perform the following checks: D = detailed check,
N = close inspection, S = visual inspection
left
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
entering the housing in compliance
with the IP rating.
IV Encapsulated components undam-
aged
V Impeller at sufficient distance from
housing (air gap), see Chapter 16.
VI Air flow not hampered. No foreign
bodies in the air section.
VII Sealing of shafts, cables, ducts
and/or conduits satisfactory.
VIII Conduit system and transition to
mixed system undamaged.
D N S
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