Electrical Connection; Fan Connection - Maico EZR ... B Series Montage- Und Betriebsanleitung

3. Transport unit to installation location and
deposit there. Observe Chapter 7.1.
4. Mount pre-fitted fan unit with mounting foot
to wall, ceiling or bracket. Mounting
material of the sufficient size should be
provided by the customer.
5. Lay folded spiral-seams ducts flush
against the fan on the inlet and outlet side.
Observe spacing for flexible cuffs or
flexible couplings (types EL../ELA..).
6. Securely screw folded spiral-seams ducts
down to fan flange bores with all screws
using flexible cuffs or flexible couplings
(types EL../ELA..). Ensure seal integrity.
7. With a free inlet, also fit a protective grille
(type SG) as protection against accidental
contact and drawing in.
8. Fit suitable insulation and sound-
deadening material.

10. Electrical connection

NOTICE
Risk of damage to unit in the event of
short-circuits.
Insulate any unnecessary cable cores.
Important notes
● Always note the relevant specifications
for electrical installations and when fitting
equipment. In Germany, observe DIN
VDE 0100 and the corresponding parts
in particular.
● The fan has to be connected to an
external control device with automatic self-
holding switch-off  Chapter 4.3 Thermal
overload protection. The control device
must not switch on again automatically
after being tripped.
● Pole-changeable motors with speed ratios
of 8/4 or 4/2 have a Dahlander pole-
changing circuit.
● Reverse in air flow direction for DZR units
with reverse wiring of external conductor
L1 and L2.
10. Electrical connection │ UK
● Operation with frequency converters is
only admitted if factory is consulted.
Feasibility must be checked in each case.

10.1 Fan connection

Prescribed tightening torques
Component
Terminal box cover M4
stainless steel cylinder head
screws
Mantle terminal M7 x 0.75 mm
Motor terminals TK
1. Switch off mains fuse and prevent from
being started up again. Attach warning sign.
2. Remove the terminal box cover.
3. Pierce cable grommet in terminal box [7]
with a nozzle pin. Note cable diameter.
4. Guide the power cable into the terminal
box such that the cable grommet fits
around the cable sheathing completely.
Have customer seal cable grommet if
required.
5. Wire fan to the terminal block according to
the wiring diagram ( Chapter 17). Note
tightening torques.
6. Connect external control device to the two
motor terminals TK of the terminal block.
Note tightening torques.
7. Install thermal motor protection for pole-
changeable units or DZR 25/4 D. The
usage temperatures may not be exceeded.
8. Fit optional on/off switch.
9. Connect optional accessory components
(speed controller, 5-step transformer)
 Chapter 10.2 or 10.3.
10. Fit terminal box cover. 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.
Check seal integrity of terminal box.
11. With protection class I, check the connec-
tion of the PE conductor.
Tightening
torque
1.0 Nm
0.7 Nm
0.7 Nm
17