7.
Installation ‒ Electrical connection │ uk
17
● Tightening torques of screws on terminal
block [19] 0.7 Nm and on terminal box
cover [21] 1.0 Nm.
● The fan has to be connected to an
external control device with automatic self-
holding switch-off. For example, to a
Maico motor protection switch MVE 10
(EZD .. BL), MV 25 (DZD .. BL) or to a
contactor circuit with self-holding. The
control device must not switch on again
automatically after being tripped.
● These units are not approved for operation
on the frequency converter as standard.
Devices for frequency converters are only
available as special versions.
Connection
1. Switch off mains fuse and prevent from
being started up again. Fit warning sign.
2. Remove the terminal box cover [21].
NOTICE
Danger of short circuits and
damage to unit. Water may
penetrate the terminal box if
the power cable is introduced
incorrectly or if the cable
grommet [22] is not fitted
correctly.
Pierce the cable grommet [22]
so that it can tightly seal the
power cable.
3. Drill mounting holes for the terminal box
[18], insert dowels and screw terminal box
down tightly at installation location.
4. Pierce cable grommet [22] in terminal box
with a nozzle pin.
5. Guide the power cable into the terminal
box such that the cable grommet fits
around the cable sheathing completely.
If necessary, seal the cable grommet
on-site.
6. Connect mains to the terminal block
according to the wiring diagram (
in
Chapter 13). Note tightening torque of
screws of 0.7 Nm.
NOTICE
Risk of damage to unit if
unauthorised external control
device is used.
Only use control devices with an
automatic, self-holding switch-off
function. For example, Maico
motor protection switch MVE 10
(EZD), MV 25 (DZD) or
contactor circuit with self-
holding.
7. Connect external control device to the two
motor terminals TK of the terminal block.
Note tightening torque of screws of 0.7
Nm.
8. Fit service switch HS 3 (
catalogue,
Internet) near unit.
9. Fit an On/Off switch provided by the
customer.
10. Connect optional accessory components
(
chapter 7.3 or 7.4).
NOTICE
Unit damage due to moisture
in the event of improperly
attached terminal box cover.
1. The terminal box cover
sealing must be flush all the
way round the terminal box.
2. Tighten screws to a tightening
torque of 1.0 Nm.
11. Fit terminal box cover.