5.6 Outdoor installation
The enclosure class of MLE motor is a NEMA 3 rating. If you install
the motor outdoors, provide the motor with a suitable cover and
open the drain holes to avoid condensation on the electronic
components. See figs Examples of covers (not supplied by
Grundfos) and Drain holes.
When fitting a cover to the motor, observe the guideline in
the section on ensuring motor cooling.
The cover must be sufficiently large to ensure that the motor is not
exposed to direct sunlight, rain or snow. Grundfos does not supply
covers. We therefore recommend that you have a cover built for the
specific application. In areas with high humidity, we recommend that
you enable the built-in standstill heating function. See the section
on standstill heating.
TM053496
Examples of covers (not supplied by Grundfos)
In order to maintain the UL mark, additional requirements
apply to the equipment. See the appendix on installation
in the USA and Canada.
Related information
5.5 Ensuring motor cooling
5.7 Drain holes
8.21 "Standstill heating"
5.7 Drain holes
When the motor is installed in moist surroundings or areas with high
humidity, the bottom drain hole must be open. The enclosure class
of the motor will then be lower. This helps prevent condensation in
the motor as the motor becomes self-venting, and it allows water
and humid air to escape.
The motor has a plugged drain hole on the drive side. You can turn
the flange 90° to both sides or 180°.
TM029037
Drain holes
5.8 Changing the position of the control (operating)
panel
DANGER
Electric shock
Death or serious personal injury
‐ Switch off the power supply to the motor and to the
signal relays. Wait at least 5 minutes before starting
any work on the motor. Make sure that the power
supply cannot be switched on accidentally.
You can turn the operating panel 180°. Follow the instructions
below.
1. Loosen the four screws (TX25) of the terminal box cover.
TM055351
Loosening the screws
2. Remove the terminal box cover.
TM055352
Removing the terminal box cover
3. Press and hold in the two locking tabs (A) while gently lifting the
plastic cover (B).
TM055353
Lifting the plastic cover
4. Turn the plastic cover 180°.
Do not twist the cable more than 90°.
TM055354
Turning the plastic cover
12
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