11
DESHU - October 2015
Technical instructions
for Installation
4/
Electrical connections
4.1/ Power supply
Electrical connections are usually on the side of the unit
(or on top),
in the axis of the main power switch
. For
electrical supply location, refer to the technical documentation or to the unit detailed drawing.
Electrical cable size shall be determined according to the information provided
in the commercial offer and
confi rmed in the wiring diagrams.
ETT does not select the type of wire to use, as the wire section depends on the installation length and type
according to the low voltage electrical board connection.
The installer shall make this calculation.
Power supply specifi cation must comply with the specifi cations of the wiring diagrams delivered with the unit.
Cable type and cross-section suitable for connection to the main power switch are indicated on the wiring
diagrams. Do not use aluminium unless specifi ed.
Unless otherwise requested in the order,
wiring is designed for 400V 3-phase power supply, with insulated
earth, without neutral
(TT system according to French standard NF C 15-100, set on the day of delivery).
If the earthing scheme is different, ETT shall not be responsible for bringing it into compliance.
All the wiring performed on site must comply with applicable regulations (appropriate wire cross-section to
avoid line voltage drops or overheating).
Our technician will control phase sequence during commissioning. In case of wrong phase sequence,
any
damage to the unit will not be covered by the guarantee
.
Our units are not protected against the risks of lightning strike. If necessary, it is the responsibility of the installer
or the client to
perform a lightning risk assessment
(LRA).
If the site is subject to a peak load reduction agreement, it may disrupt equipment operation (risk of controller
or drives fault). We can propose a technical solution to handle peak load reduction without affecting
equipment operation.
!
Warning:
Operation with a non-compliant supply voltage, or with an excessive phase unbalance
(5% maximum), is considered improper and voids the guarantee.
4.2/ Temperature probe connection
The temperature probe is installed on return air side.
4.3/ Humidity probe connection
The humidity probe is installed on return air side.
The probe is delivered in a plastic bag to avoid saturation during transport.
The ETT technician will install it during commissioning.
